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NEC TG-16/TE/TurboDuo => TG/PCE Repair/Mod Discussion => Topic started by: Platinumfungi on June 02, 2008, 01:02:51 PM

Title: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: Platinumfungi on June 02, 2008, 01:02:51 PM
Here's a chart of the capacitors in the Turbo Express. I'm not sure but I'm assuming that the JPN version is the same. Hopefully this will make repair work for people a bit easier.

Please feel free to use it, but don't claim that this is yours or try to make money off it. That's not why this is here...

As always questions and comments welcome.

Special thanks go to Nat for adding some missing information, and to Custm42435 for making a correction :D
https://postimg.cc/Mc7LLhbY

(https://i.postimg.cc/yNtzDKD2/Express-Capreplacementchart31.jpg) (https://postimages.org/)
Title: Re: Turbo Express total cap replacement chart - need two caps ID'ed still...
Post by: nat on June 02, 2008, 01:14:53 PM
100uf 6v
Title: Re: Turbo Express total cap replacement chart - need two caps ID'ed still...
Post by: Platinumfungi on June 02, 2008, 02:15:16 PM
Great! Thanks Nat. I'll update this within 24 hours.

Updated and ready!
Title: Re: Turbo Express total cap replacement chart
Post by: chop5 on June 03, 2008, 04:02:28 PM
nice chart  :)
Title: Re: Turbo Express total cap replacement chart
Post by: Platinumfungi on June 04, 2008, 12:22:12 PM
Thanks chop. PM me if you'd still like a Duo pic.
Title: Re: Turbo Express total cap replacement chart
Post by: Platinumfungi on November 22, 2008, 09:48:43 AM
Just updated the chart with new info from Nat.
Title: Re: Turbo Express total cap replacement chart
Post by: Duo_R on November 22, 2008, 12:08:49 PM
RG - this is really nice. I liked using your Duo chart, that was very helpful! For those installing - try to not go more than 2X the original voltage.
Title: Re: Turbo Express total cap replacement chart
Post by: agt_dale_cooper on November 23, 2008, 10:42:30 AM
NICE frigging chart!!!!
I suggest a sticky for this, if possible.
Also need somebody to update the Duo version of this, version I have from Duo_R only has uF, not voltages....
Title: Re: Turbo Express total cap replacement chart
Post by: Platinumfungi on December 06, 2008, 12:16:48 PM
Thanks  :D

I'll update the Duo chart if you'd like (if mine is the one you're talking about?). It's listed here in the repair/mod forum somewhere. Just search for "Duo total capacitor replacement chart".
Title: Re: Turbo Express total cap replacement chart
Post by: brettlee on December 25, 2008, 03:32:37 PM
Hey guys, this chart should be put as a sticky. Simply invalueble info  :!:
Title: Re: Turbo Express total cap replacement chart
Post by: Mehunglo on January 10, 2009, 05:40:59 AM
YYYEEESSSS!!!!
Title: Re: Turbo Express total cap replacement chart
Post by: vasteelyobabymama on January 15, 2009, 08:30:36 PM
what type of iron do i have to use to replace the caps?
Title: Re: Turbo Express total cap replacement chart
Post by: Platinumfungi on January 16, 2009, 12:27:34 PM
Just a standard 15 watt soldering iron is fine. You can get one at Radio Shack if you need one. I think they're about $8.
Title: Re: Turbo Express total capacitor replacement chart
Post by: pceslayer on March 08, 2009, 03:47:32 PM
This chart needs to be a sticky! :)

ok now my question... What would happen if I replace the Audio with 33uF 6.3V caps? nothing?

How dangerous is it to go above the current voltage?
Title: Re: Turbo Express total capacitor replacement chart
Post by: Duo_R on March 08, 2009, 05:40:49 PM
You would hear sound.  :D

.......For those installing - try to not go more than 2X the original voltage.


This chart needs to be a sticky! :)

ok now my question... What would happen if I replace the Audio with 33uF 6.3V caps? nothing?

How dangerouse is it to go above the current voltage?

Title: Re: Turbo Express total capacitor replacement chart
Post by: Platinumfungi on March 09, 2009, 05:41:23 AM
This chart needs to be a sticky! :)

I think it's in the works  :D (I asked about it at least)
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: marshallh on April 28, 2009, 12:10:34 PM
I'm fixing a TurboExpress for commision, which was completely dead. No video or sound. I used some capacitors I had laying around and did both the sound and video fixes. They did nothing.

I looked closer at the SMD caps and found that they were ALL leaking except for the three 100uF 16v bigger caps. You can tell because there is a yellowish coloring on the leads.

I didn't want to cram leaded caps in there, so I found SMD replacements from Digikey.

1   8   493-2088-1-ND   CAP 100UF 6.3V ELECT WX SMD      0   0.17000   $1.36
2   1   493-2118-1-ND   CAP 22UF 35V ELECT WX SMD      0   0.17000   $0.17
3   1   493-2083-1-ND   CAP 22UF 6.3V ELECT WX SMD      0   0.13000   $0.13
4   5   PCE3859CT-ND   CAP ELECT 33UF 6.3V VS SMD      0   0.15200   $0.76
5   1   493-2099-1-ND   CAP 10UF 16V ELECT WX SMD      0   0.13000   $0.13
6   5   PCE4643CT-ND   CAP ELECT 4.7UF 35V VS SMD      0   0.15400   $0.77
7   5   PCE4304CT-ND   CAP 4.7UF 50V ELECT VS BI-POLAR      0   0.28800   $1.44
8   3   493-2105-1-ND   CAP 100UF 16V ELECT WX SMD      0   0.17000   $0.51

The part number is the third column. The Panasonic resistors can only be ordered in sets of 5.

After replacing all these capacitors the TE booted right up, and was loud as heck.
I'm pretty sure everyone is going to need to replace all the capacitors eventually. The video fix and audio fix are bandaids at best.

The bad capacitors:
(http://img254.imageshack.us/img254/6429/img0613s.html)

Fixed
(http://img165.imageshack.us/img165/8585/img0609rjm.html)

These are the new ones. Hopefully you can't tell the difference, except for the one trace I lifted XD
(http://img253.imageshack.us/img253/38/img0608.html)
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: bacteria on April 29, 2009, 03:04:49 AM
Ah, marshallh - decided to pop over here and dip your toes into the water from the BenHeck forum then?  :D  8)
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: marshallh on April 29, 2009, 05:26:21 PM
Yeah, the TurboExpress is such a unique piece of machinery that I thought it was fitting the job got done right.

I'm already planning a CoreGrafx portable, with built-in flash cart. The addressing scheme seems to be pretty simple and no dirty tricks like the NES/SNES. Far off in the future, though. I might have more motivation if there's a demand for such a thing.
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: bacteria on April 29, 2009, 05:33:02 PM
Interesting project. No idea market for it, the consoles are expensive as you know; although the games are very good. Using a flashcard is a good idea, although of course most of the games (good ones) aren't that expensive. The TurboGrafx/PC-Engine games are one of my favourite platforms now; so I am looking forward to finishing my project.
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: spenoza on April 29, 2009, 05:48:19 PM
There is SO demand for this. Hell, I won't be a grad student forever. I intend to be employed full-time in the next year, and if you pull this off it'll be at the top of my wish list.

Yeah, the TurboExpress is such a unique piece of machinery that I thought it was fitting the job got done right.

I'm already planning a CoreGrafx portable, with built-in flash cart. The addressing scheme seems to be pretty simple and no dirty tricks like the NES/SNES. Far off in the future, though. I might have more motivation if there's a demand for such a thing.
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: Custm42435 on June 04, 2009, 02:10:22 PM
Here's a chart of the caps on the Turbo Express I made. I'm not sure but I'm assuming that the JPN version is the same.

Hopefully this will make Express repair work for people a bit easier.

Please feel free to use it, but don't claim that this is yours or try to make money off it. That's not why this is here...

Special thanks go to Nat for adding some missing information :D

(http://pic.photobucket.com/bwe.png)


The bottom center cap under the metal shield is a 10uf 16v not a 100uf 6v.... cc704
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: blueraven on June 04, 2009, 03:04:38 PM
I just pulled all the caps off of my express and that one was a 100uf 6v.
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: Custm42435 on June 04, 2009, 03:09:48 PM
I just pulled all the caps off of my express and that one was a 100uf 6v.
i meant the bottom center one... its a 10uf 16v not a 100uf 6v
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: blueraven on June 04, 2009, 03:27:10 PM
I thought you meant the center one, under the heat shield. You're right! 10uf 16v!
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: Platinumfungi on June 05, 2009, 07:35:40 AM
I'll update the chart in the near future with that cap info. Thanks for catching it :D
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: Platinumfungi on June 17, 2009, 11:09:54 AM
Ok, just updated the chart with the corrected cap. Thanks again Custm42435 for catching it  :D

It's a bit more zoomed in this time...doesn't quite fit on the page but you can scroll over... I'm not in the mood to work on it anymore at this time so I'm leaving it like this unless people really think it's an issue.

Enjoy!
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: Platinumfungi on July 16, 2009, 05:34:42 AM
Just uploaded a totally new version of the cap chart. Better photo, better background, etc. Enjoy  :D
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: esteban on July 20, 2009, 11:15:12 AM
Rock on, this is nice as well. Good work. :)
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: BlackandBlue on July 21, 2009, 12:47:49 AM
Thanks, this is going to come in handy shortly... or whenever I actually get myself to start replacing the caps.  I opted for the radial type resistors, so hopefully I can squeeze them all in there.
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: override on August 17, 2009, 11:28:07 AM
I figured this would be as good a place for any to show Bludgeons Turbo Express! I took it apart yesterday and examined the board, it didnt look all that bad....until I started pulling caps off.  :shock:

EVERY SINGLE CAP LEAKED, even the one on the controller board...When Blud sent me the system it would not play video or sound at all...In fact I would go as far to say (although I didnt test) it may not of even turned on if I had tried. I ordered all High Temperature capacitors for the system from mouser.com (which now that I have used mouser I would recommend them over newark.com). They had every cap needed at good prices! Also shipping was I think 2 days from the night I ordered and it all came in one box unlike newarks two boxs that didnt arrive at the same time.

Well I got the caps in and went to town, I started pulling cap to find out how bad it really was! In the first picture of this post, I had all caps removed, you can see the electrlytic acid all over the board, it was glistening there was so much. After pulling everything off I went to the sink, filled with warm water and sprayed the board down with what seems to be a very good cleaning agent! I have used it on all the board so far and it does very well. The cleaner is called tough and gentle all-purpose cleaner. I cleaned the board with a toothbrush, rinsed and then stuck it in the oven for 15 mintues to dry!


Boards now clean and dry, I desoldered as much from the cap pads as possible, and then scrapped all of them with a flat blade x-acto knife. I then added flux to each pad followed by a soldering iron to kinda help prepare them. After all was clean, I reflowed solder on every pad, i had to go back and scrap a couple more pads to get the solder to flow on the full pad. Afterwords I applied flux again to the newley soldered pads.

Now its time to pull the caps out and figure the placement for them, so I start examining and cutting cap legs to fit the board. I soldering all the caps back together and cleaned the board one last time with a blast of air.

System goes back together for a test run......I notice that some caps are not allowing the system to fit properly at this stage. Popped some batterys in and tested the Turbo Express! Sucess!!! :clap:  :clap: The TE was loud and clear and video was working great!

Ok, now its time to take apart and figure out which caps need to be moved around....I figured it all out, recut and resoldered some stuff, added hot glue to spots that seem they may be trouble areas and to help secure some caps. System goes back together, all final pictures are taken....Now its time for a final test run. System is functioning correctly and plays well, sound is clear and crisp!

Ready for the pics and final video I made for Bludgeon? Im sure the suspense is building! lol

Well here they are, all high temp caps, I believe should be ok up to 105°C which converts to 221°F!

The three red circles were caps that were so bad they popped off by thumb pressure alone, the blue cap was the first I had replace but had leaked really bad:


Caps pulled board uncleaned:
(http://pic.photobucket.com/bwe.png)

Board cleaned and scraped:
(http://pic.photobucket.com/bwe.png)

Cap Pads reflown with solder:
(http://pic.photobucket.com/bwe.png)

Caps almost finsihed:
(http://pic.photobucket.com/bwe.png)

Rearranged a Cap or two:
(http://pic.photobucket.com/bwe.png)

Rearranged caps final:
(http://pic.photobucket.com/bwe.png)

Controller Board:
(http://pic.photobucket.com/bwe.png)

Front gaurd back on:
(http://pic.photobucket.com/bwe.png)

Back gaurd back on:
(http://pic.photobucket.com/bwe.png)

Final video for Blugeon:
(http://i621.photobucket.com/albums/tt295/dpg_override/Blugeons%20TE/th_Bludsfinaltest.jpg) (http://s621.photobucket.com/albums/tt295/dpg_override/Blugeons TE/?action=view&current=Bludsfinaltest.flv)

Thanks goes out to Red Ghost for the visual guide to follow! Helped the process move faster! I noticed on this board there were only (6) 100uF 6v caps....Start to finish was 3hrs 30minutes!  :clap:
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: Bludgeon on August 17, 2009, 03:21:57 PM
To sweet. Can hardly wait to get my baby back and my Duo also. Thank you very much Override for ressurecting what I thought was a 300.00 paperweight. Now to see if the tv tuner still gets tv stations in. lol
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: Duo_R on August 17, 2009, 05:24:21 PM
nice job override, that is how I normally replace the caps but haven't seen one yet that needed a full swap. Oh and nice wifebeater.... LOLMAX
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: Necromancer on August 18, 2009, 03:34:29 AM
Another 'Express saved from the landfill.  Congrats on gettin' 'er sorted out and back in order.  8)

Oh and nice wifebeater.... LOLMAX
:lol:
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: blueraven on August 19, 2009, 09:20:45 PM
You may remember my completely-narfed express from this thread:

http://www.pcenginefx.com/forums/index.php?topic=6971.0

Every cap in this Turbo Express was corroded and leaking, except for the 470uf cap right between the volume and tint knob. Although I was able to get the unit to boot once to watch Jeapordy with no sound before the digital TV switchover, it popped, fizzled, and went dead. The video caps faded, and the sound was non-existent even with earphones. The batteries were left in this thing for YEARS, and then it was left in a damp basement.  #-o

I opened the TE, and found extensive rust residue that had collected in the bottom of the unit. The entire thing was disassembled, cleaned with 70% isopropyl alcohol and a toothbrush, fluxed and oiled. Upon disconnecting the board, I could already smell battery acid (that alkaline thing) :-s

This is how the board looked after the capacitors were removed, and extensive cleaning.

(http://i430.photobucket.com/albums/qq21/Rookstower/Video%20Games/repairs/express-fullcap/express-initial.jpg)

The board is generally in pretty good shape. After cleaning and desoldering the board, It started to look good until the copper traces lifted away with the solder from their 10-year encounter with the battery acid. I make new traces with pieces of tinfoil and proceed.

(http://i430.photobucket.com/albums/qq21/Rookstower/Video%20Games/repairs/express-fullcap/express-cleaned.jpg)

The NTK 180° cap replacement went excellent as a general rule, with the exceptions of the three trouble caps; The to 100uf caps right next to the audio caps, and the one left video cap. In two of the three cases, I had to trace back to the hole, and solder the scrap-legs of capacitors directly into the trace hole and cross-hatch at 45-90 degrees to make a connection. The video cap was the worst.

You may also notice the discolored pin on the bottom HU6280 CPU chip, it was a huge rust deposit that covered 3 solder pins  :shock: and was cleaned upon initial assembly. 

Here's the finished board; with 47uf sound caps (teh Upgrad3Z! Little buggers are LOUD!)  8)

(http://i430.photobucket.com/albums/qq21/Rookstower/Video%20Games/repairs/express-fullcap/express-repaired.jpg)

Special thanks to chop5, Override, and The Old Rover for bearing with me on this in shout! Also, thanks RedGhost for the diagram; the old Engineer guys at the electronics store were really impressed when they saw how thorough it was! :clap:

I cracked a Pabst and played Bonk's Revenge and Splatterhouse for the first time in 15 years last night. Even killed teh 6 batteries.  :mrgreen:

(http://i430.photobucket.com/albums/qq21/Rookstower/Video%20Games/repairs/express-fullcap/express-working.jpg)
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: override on August 20, 2009, 07:47:52 AM
Im very glad to have been able to help ya blue! Congrats to another successful TE save!  :clap:
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: chriscomputers on February 24, 2011, 10:08:52 AM
I have been staying quite on this matter because from what I can tell the topic how now become pretty ugly. I have in no way stolen your idea to make a huge gain for myself. I have been repairing drives like this for a couple years now for a couple local video game stores in my area. It's only been recently that I have decided to put my services on ebay. You claim that my price is too high. I spend at least 5-6 hours working on and testing these drives. I also have to buy parts for the repairs. Do you know how much money I actually make? About $8 an hour after it's all said and done. If it was about money I'd just go and get a 2nd job and not offer this service. You are welcome to offer your service for less and to take some of my buisiness. I am not worried or care about that as this is not my full time job and it is something I do to help people out by keeping their CD drives going. I just don't like being blamed as a stealer of someone elses ideas for my own gain. Think it all you want but this is not the case. 
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: Necromancer on February 24, 2011, 10:22:15 AM
I have been staying quite on this matter because from what I can tell the topic how now become pretty ugly. I have in no way stolen your idea to make a huge gain for myself. I have been repairing drives like this for a couple years now for a couple local video game stores in my area. It's only been recently that I have decided to put my services on ebay. You claim that my price is too high. I spend at least 5-6 hours working on and testing these drives. I also have to buy parts for the repairs. Do you know how much money I actually make? About $8 an hour after it's all said and done. If it was about money I'd just go and get a 2nd job and not offer this service. You are welcome to offer your service for less and to take some of my buisiness. I am not worried or care about that as this is not my full time job and it is something I do to help people out by keeping their CD drives going. I just don't like being blamed as a stealer of someone elses ideas for my own gain. Think it all you want but this is not the case. 

Wrong thread, chief.  I don't know if the chicken or the egg came first, but it sure would've been nice if you shared your experiences with the other peeps trying to repair stuff.
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: thesteve on April 18, 2011, 05:12:57 PM
why is everyone using leaded caps, oe style are available at digikey and not bad at install.
http://onlinecatalog.digikey.com/WebProject.asp?CodeId=7.4.4.18&pagelabel=1721#
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: PunkicCyborg on April 25, 2011, 12:52:36 PM
I changed mine out this weekend and I am amazed at how much it improved the picture quality. I didn't have any sound at all before and now I can hear the KILLER music in Rastan Saga 2 in all it's glory on the go.
Thanks this awesome forum for all the help especially from BlueBMW and Chop5.
If anyone is hesitant about trying this, I had minimal soldering skill and was a little nervous at first but it turned out great. If I can do it you can too.
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: roflmao on April 25, 2011, 06:19:33 PM
That's good to know.  I'll have to give it a shot on mine as well since it's basically a paper-weight right now. :(
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: thesteve on May 09, 2011, 05:33:48 PM
just got this one butchered as received
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: thesteve on May 09, 2011, 05:35:41 PM
repairs begun
using wires and wire strands to replace missing runs
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: thesteve on May 09, 2011, 05:38:39 PM
capacitors replaced
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: thesteve on May 09, 2011, 05:40:57 PM
working perfect
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: roflmao on May 19, 2011, 02:17:49 PM
Well, I went ahead and ordered a complete set of caps from Mouser.  Hopefully my poor little Express will be back in business sometime next week!
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: roflmao on June 05, 2011, 01:40:37 PM
Well I got my caps awhile back and have made 2 attempts at doing the replacement myself and have come to the conclusion that I suck at this. :) Is there anyone on the board here that would be willing to  take a crack at doing the repair on mine?  I ordered enough caps to replace them all on 5 expresses so whoever can do this repair will get all of those and I can offer cash or games or something to sweeten the deal.
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: thesteve on June 05, 2011, 07:35:51 PM
i can, chop can, beemer can.
likely others too.
look through this thread to see some of our work on the express.
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: roflmao on June 06, 2011, 12:20:08 AM
Thanks, thesteve.  Beemer sent me a PM so I'm sending it his way.  This community is too awesome. :)
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: Keith Courage on June 09, 2011, 05:57:15 AM
So has anyone here ever had to replace all the caps before? I mean I have repaired 3 turbo express units (one for me and two for friends) All they needed was the typical 1 Video cap replaced and 4 audio caps replaced. Do the other ones eventually go bad as well?
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: BlueBMW on June 09, 2011, 06:04:55 AM
I always do all the caps.  Every time I removed any of the other caps I find leakage.  While it might not manifest in audio or video issues, you know eventually the leakage will corrode something important and cause system failure.  There aren't many caps on an express so there really is no reason to not do them all if you've got it apart.
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: thesteve on June 09, 2011, 08:09:25 AM
i just changed my 16V caps
leakage was present and the picture got more vivid
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: daedalia on June 22, 2011, 04:04:52 AM
Replaced all the caps in my PCE GT and just want to say thanks to all those who contributed. Used surface mounts thanks to marshalh, first time and fairly easy to solder, practiced on an old video card.

With regard to doing all the caps; I'd recommend it. While working on mine I accidently breathed on a few and they flew off. Not only leaking but they were badly corroded too, took a bit of prep to sort the contacts out. Miraculous the unit worked at all. So I'd say if you are going to open it, you may as well do them all. All of mine were fooked.
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: Keith Courage on June 24, 2011, 08:30:33 AM
I have already replaced the necessary audio caps on my turbo express. However, I was thinking about trying some 47UF instead of the 33UF to make it a little louder as stated in the cap replacement chart. Has anyone ever done this? Is it safe and are there any long term problems if done this way?
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: thesteve on June 24, 2011, 10:20:35 AM
i use 47's on all mine
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: BlueBMW on June 24, 2011, 12:41:33 PM
As do I.  Saves me from having to order 33uf caps :mrgreen:
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: blueraven on June 29, 2011, 02:04:35 PM
Attached photo of a full silver cap replacement with NTK Hi-Temp capacitors on a PC Engine GT. The 100uf caps are really bad on these, so be really careful removing the three right next to the 33/47uf sound caps.

I have already clearanced the caps for re-assembly, so if you organize and place them similarly to how I have in the picture, the unit will go back to together without any major issues.

Also, when re-attaching the board to the plastic backing, make SURE to put a screw (you have 3 and 4 holes) in the Top Right hole, where all the traces shroud around, or the hu-card will stick out and you will have to hold it down when you flip the power switch.  

I keep this chart open on my screen every time I repair one of these :D
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: thesteve on June 29, 2011, 03:09:58 PM
I printed the chart, and work from the paper.
when using caps with wires, surface mounted like that you should use some silicone calking to glue them in place.
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: boliver on August 04, 2011, 12:30:06 AM
hi, I have a broken turbo express. i accidentally hooked up a 12 volt power adapter to it, now its completely dead when i put games in or when i turn on the tv tuner. only the lcd backlight still works. i was wondering if i could pay someone to look at it.

thanks!
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: thesteve on August 04, 2011, 03:31:24 AM
pm sent
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: farankoshan on August 28, 2011, 10:16:59 AM
My TurboExpress won't even boot up anymore (no sound, no audio, and seemingly no power). Will a total replacement of the caps solve that problem?
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: BlueBMW on August 28, 2011, 10:23:59 AM
Its possible... but if it is because of caps, its very likely you'll have to repair some traces and maybe some other components that have been damaged by leaked capacitor fluid.
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: farankoshan on August 28, 2011, 10:39:46 AM
:( :( :( :( I will begin the long road to raising this baby from the dead.
Hopefully, my efforts will not be for naught.
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: BlueBMW on August 28, 2011, 11:03:31 AM
:( :( :( :( I will begin the long road to raising this baby from the dead.
Hopefully, my efforts will not be for naught.

If you fail, one of us can surely fix it :D
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: farankoshan on August 28, 2011, 06:45:12 PM
Hey thanks, BlueBMW!

I do hope it's capacitor-fixable for now. :)

(Is it just me, or is Red Ghost's chart and diagram lacking...?)
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: BlueBMW on August 29, 2011, 12:46:51 AM
(Is it just me, or is Red Ghost's chart and diagram lacking...?)

Lacking in what way?  It shows all the capacitors that tend to fail.  The solid surface mount capacitors dont have the same problems that the aluminum electrolytics do.
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: farankoshan on August 30, 2011, 08:37:35 PM
Does anyone know where I can source a replacement for the transformer that powers the screen lamp? Mine shorted (due to cap leakage) and I'm not sure where to find a replacement...
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: BlueBMW on August 31, 2011, 12:28:24 AM
The best bet would be from a junk express / gt.   Shoot username Duo_R a pm.  I seem tobrecall he may have a few completely dead or severely damaged expresses.
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: phipscube on September 12, 2011, 02:58:21 AM
This is a fantastic Guide!! I recently bought a PC Engine GT and it had very weak audio and washed out colour. I did a full cap replacement and its now working great! nice loud audio (I used 47uF caps on the audio section) and much nicer colour :) The only thing that i'm a bit gutted about is the screen has a dead pixel appear after I did this. I was very careful with the top shell/display but for some reason when I assembled the unit the dead pixel was there. Not a REALLY big deal as it's not noticable when playing, but i'm a bit of a perfectionist so it bugs me a bit when the screen is black.
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: BlueBMW on September 12, 2011, 03:31:26 AM
Finding an express without a dead pixel is hard.  They almost all have at least one dead pixel.
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: phipscube on September 12, 2011, 07:25:19 PM
Ah ok, I thought I could have done something to make it appear. Just coincidence I guess :)
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: thesteve on September 12, 2011, 08:42:41 PM
of the 5 i think, expresses i have worked on, only one has a dead pixel. PS. its one of mine
even TZD listed dead pixels as common, and nothing to be concerned with
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: BlueBMW on September 13, 2011, 03:13:41 AM
So that's where all the good expresses are.. :lol:  stevs been hoarding them
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: farankoshan on September 13, 2011, 07:15:02 AM
please send one my way... hehehe. :)

My Express is now just a glorified bit-tunes player for Turbografx music...
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: thesteve on September 13, 2011, 07:20:15 AM
i only have 2, 1 with a perfect screen.
the other perfect screens i have seen were units i fixed for others. (all the ones fixed for others)
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: farankoshan on September 13, 2011, 07:23:44 AM
i only have 2, 1 with a perfect screen.
the other perfect screens i have seen were units i fixed for others. (all the ones fixed for others)

One day, stevo! :) One day! You've helped me so much over this thread, man... but, yeah, I have to send my dead-screened Express to you one day.

Until then, I've managed to get to the Sound Test debug of Blazing Lazers, purely on audio alone... good tunes. Gotta admit, the TurboExpress still does that job right with the great 47uF caps doing their job. ;)
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: phipscube on September 14, 2011, 09:06:52 PM
I wonder if there is a way to make dead pixels work again on PCE GT/TGE?... Mine is sometimes a colour, not just black, so i'm wondering if its just a bit "stuck". I've seen programs that flash flat colours quickly to bring back stuck pixels on PC monitors. It would be cool if some kind of homebrew program existied for PCE to try this (loaded up on a flash cart of some sort like the Neo Power 128M).
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: Necromancer on September 15, 2011, 02:57:07 AM
I've seen programs that flash flat colours quickly to bring back stuck pixels on PC monitors. It would be cool if some kind of homebrew program existied for PCE to try this (loaded up on a flash cart of some sort like the Neo Power 128M).


Rover made such a color cycling program (http://www.pcenginefx.com/forums/index.php?topic=5015.msg86234#msg86234).  :wink:
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: phipscube on September 15, 2011, 03:16:39 AM
That's awesome! I'll give that thread a good read, it looks very interesting, Thanks necromancer :)
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: phipscube on September 17, 2011, 12:43:36 AM
If any of you guys are interested I posted some photos of my efforts replacing my caps over on Amibay where i'm a regular, I also plugged this awesome site a bit ;) : -

http://www.amibay.com/showthread.php?p=212375#post212375
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: BlueBMW on September 17, 2011, 10:52:55 AM
If any of you guys are interested I posted some photos of my efforts replacing my caps over on Amibay where i'm a regular, I also plugged this awesome site a bit ;) : -

http://www.amibay.com/showthread.php?p=212375#post212375


Nice writeup :D  That one guy had never heard of a portable PC engine!?  [-( [-X  :lol:

Hopefully that mod chip will arrive soon so you can really be playing in style!
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: phipscube on September 18, 2011, 05:46:59 AM
If any of you guys are interested I posted some photos of my efforts replacing my caps over on Amibay where i'm a regular, I also plugged this awesome site a bit ;) : -

http://www.amibay.com/showthread.php?p=212375#post212375


Nice writeup :D  That one guy had never heard of a portable PC engine!?  [-( [-X  :lol:

Hopefully that mod chip will arrive soon so you can really be playing in style!


Thanks mate :) Yeah that guy not knowing about a "Handheld PC engine" tsk tsk! Not sure if he was pulling my leg so replied very neutrally.

I do hope the mod chips get here soon, i'm itching to get cracking. Probably not too much longer to wait now :)
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: farankoshan on September 18, 2011, 10:04:30 AM
Congratulations on the fix! It's real good to see GTs/Expresses work just fine after a cap replacement. :)
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: farankoshan on September 20, 2011, 06:22:38 AM
Guys, I just noticed now, and I'm a little confused. On this thread (Turbo Express Cap Replacement Chart), the very helpful chart says that bringing up the 33uF 6V cap to a 47uF 6.3v cap will improve the speaker audio.

But on this thread:
http://www.pcenginefx.com/forums/index.php?topic=702.0

The audio fix comes from replacing the 100uF 6V caps.

Are they both for audio? Or has one of the guides been made obsolete?
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: thesteve on September 20, 2011, 07:22:49 AM
both are coupling caps, in the audio circuit.
33uf are stock.
47uf and 22uf are much more common and both work equally well.
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: farankoshan on September 20, 2011, 07:52:59 AM
I see. :) Thanks for clarifying, Stevo! Good caps for good sound. Makes sense to me. :)

This forum continues to be the friendliest, & most helpful NEC-related one around. :)
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: Alexander78 on December 06, 2011, 01:39:24 AM
Hello people ! I'm new, I'm italian, sorry for my english ....

I have a PC Engine GT  this guide goes well for the PC Engine GT ?

 What type of SMD (caps) should be used ????

What are the best smd caps to use?
 ( example: polyester, polypropylene or ceramic ? )
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: thesteve on December 06, 2011, 02:18:54 PM
ceramic are best.
tantalum come in larger sizes
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: HercTNT on December 07, 2011, 12:01:06 AM
With capacitors coming in so many varieties, does one type excel in say an audio environment more than another? Or a game system? and so on.... I guess what I mean is for example, if your gonna recap a hand held console, does one capacitor have an advantage over another?  measurable improved battery life or cleaner picture and sound.......
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: Alexander78 on December 07, 2011, 12:35:12 AM
ceramic are best.
tantalum come in larger sizes


Thanks thesteve, so  ceramic are the best, then I will use these.

I want to replace all smd caps of the my Pc Engine Gt (version jap)

I hope not to do stupid things on the GT.

This tutorial in this forum i think That It Is Also useful for the PC Engine GT (Jap version)
 and not only for the Turbo Express,   is not it  ????

Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: BlueBMW on December 07, 2011, 02:25:23 AM
The board layout is the same US and JPN with regard to capacitors.
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: Alexander78 on December 07, 2011, 07:26:00 AM
the board is identical to Turbo Express, but all smd Also, just?

I'll change all the SMD  present in the board
 
for BlueBMW:   is a particular question .... but.... How old you have to wait for capacitors to change of again ????   (about)
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: BlueBMW on December 07, 2011, 08:15:41 AM
In theory electrolytics will last 15 years or so, often longer.    If you change to solid caps like ceramics they should outlive you :)
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: Alexander78 on December 07, 2011, 09:53:07 PM
ah ok, in theory 15 years ....

but the ceramic caps are not too big to put on the board Pc-Engine Gt ?
I am afraid that the Gt is difficult mount with caps in ceramic.... (they are too large in nature)

if you put small caps smd as the original ones, I would not have trouble closing and mount the two parts Pc-Engine Gt

I want to find, the caps used in the original Pc-Engine GT  (Although I know that will not be easy)
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: thesteve on December 08, 2011, 09:11:35 AM
look at an earlier post, i have used ceramics in TE.
they are smaller than original

http://www.pcenginefx.com/forums/index.php?topic=10167.0
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: Alexander78 on December 09, 2011, 02:11:07 AM
for thesteve:    great post! 

incredible these small tantalum capacitors , with these I would not problems  in closing and to mount the Gt ....
 
I asked my local electronics store here in Italy but does not sell them ....

I think they are not easy to find .... (are special)

thesteve, where you found them ?   what store ?
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: thesteve on December 09, 2011, 06:39:19 AM
ive been getting my ceramics on ebay from the manufacturers in 50 and 100 counts
the tantelum caps im using are the 100uf shown and i bought 1500 of them as new surplus on ebay.
all the parts i used can be bought from most on line electronics suppliers.
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: Alexander78 on December 09, 2011, 11:43:51 AM
Thanks thesteve, BlueBMW for the info.   ;)
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: Alexander78 on December 15, 2011, 12:45:26 AM
ive been getting my ceramics on ebay from the manufacturers in 50 and 100 counts
the tantelum caps im using are the 100uf shown and i bought 1500 of them as new surplus on ebay.
all the parts i used can be bought from most on line electronics suppliers.




Hello thesteve, 


I was speechless because I can not understand the problem ...

 I did run the operation by a skilled electronics technician

 I did replace all the capacitors on the card of my PC-engine Gt (version jap).

Are been welded type smd  " electrolytic "  capacitors, all with the same value, but I have not solved the sound problem and the delay of the screen.

The technician after who performed the surgery, saw something explode capacitor

I can not understand the problem .... can you help me understand what may be the problem?

I changed all the capacitors, with  "electrolytic capacitors smd"  putting but I have not solved the problem of audio and video, can you help me ?   

(some capacitors are even exploded)

Is there anything else I should check or replace  ?
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: thesteve on December 15, 2011, 04:11:52 AM
if you have new caps exploding they were too low of voltage rating or installed backwords.
the original caps often explode or leak, requiring the board to be cleaned and sometimes repaired to restore function
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: Alexander78 on December 15, 2011, 11:22:27 PM
my Pc-Engine Gt  has the sound down and the delay of the screen.

The electrolytic caps that I did solder on the board were of the same value as the original.

Some new caps explode because the caps in the originals time they released the liquid on the board or perhaps the my board is damaged. But how can I tell my technician to indicate where my board is damaged ?

thesteve, how can I resolve ? only with a cleaning ?

Please... What should I tell my technician do to solve the problem ? ?
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: thesteve on December 16, 2011, 04:10:48 AM
if you used tantalum caps they are often marked reverse to the ones originally used.
even a damaged board would not cause the caps to explode.
as for the video delays, the screens of the time were not that great, and veried considerably from one to another.
the caps can cause some screen issues, but are often not the issue.
try using a headset for a better idea of the sound functionally
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: Alexander78 on December 16, 2011, 04:38:27 AM
The caps that were used are "electrolytic type", what do you advise me to do thesteve ?
What information should I give to the technician ?
He replaces the caps and some explode....

only putting "the original old's the caps"  work ,  but the audio and video are not normal.


I do not understand how to find a solution to the my problem.
What would you do ?
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: thesteve on December 16, 2011, 06:51:58 AM
some good pics would be helpfull (pics of the board and the video defect)
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: Alexander78 on December 17, 2011, 11:45:11 AM
thesteve ok, I would have pictures to show you...
 
thesteve how I can send you pictures of the my board in this forum ?
(I do not see the tool to insert the image in my posts)

can you tell me how to insert the picture ?
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: thesteve on December 17, 2011, 12:31:16 PM
if you hit the reply button it opens the full post editor
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: BlueBMW on December 17, 2011, 12:53:57 PM
Its usually easiest to host the pictures on another site like photobucket and then link to them here.
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: Alexander78 on December 17, 2011, 09:24:20 PM
some good pics would be helpfull (pics of the board and the video defect)


thesteve ok, start to post link pictures ....

The PC engine now is in the lab by my technician, the photos that I have right now are all shielded in the board....

I hope that these photos can help you to understand my problem, I do not know if my board is to clean or is damaged ....

I can not do the video .... because my pc-engine Gt is in a laboratory by a technician who does not know what to do. However, when you turn on my pc-engine Gt the screen is black after a few minutes then slowly stabilizes the image screen and you can see well with good colors, Instead the audio
is very low but with headphones you feel better.

I post link my images....


link Photo high-resolution

http://img828.imageshack.us/img828/3886/photo8upk.jpg (http://img828.imageshack.us/img828/3886/photo8upk.html)


other link Photo Board high-resolution

http://img526.imageshack.us/img526/9394/photo3var.jpg (http://img526.imageshack.us/img526/9394/photo3var.html)


other link Photo

http://img338.imageshack.us/img338/7686/photo4iz.jpg (http://img338.imageshack.us/img338/7686/photo4iz.html)


other link

http://img85.imageshack.us/img85/8779/photo5ry.jpg (http://img85.imageshack.us/img85/8779/photo5ry.html)


Even if they are photo with board  shielded I hope that can help.


Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: thesteve on December 17, 2011, 09:56:34 PM
hmm i was hoping for the after pics.
that does not look bad at all (should have been a simple cap swap to fix it)
the real question is what damage was done during the cap swap
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: Alexander78 on December 18, 2011, 11:05:17 AM
thesteve what do I do....  I do not understand almost nothing about electronics.
Maybe solve this problem, is like finding a needle in a haystack.
The same capacitors are used with the same values and see some capacitors that explode when they are replaced it is not normal.

my technician wants information, what can I tell him to do  ? ? ? ?  :-k
   
( thesteve aspect  your advice, to put it to my technician to try to solve my problem )

Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: thesteve on December 18, 2011, 12:06:42 PM
its not normal for the replaced ones to explode.
it took many years for the original caps to fail, the same can be expected of the replacements.
the slow pic is likely due to cap failure, however its possible for the lamp to fail as well.
the sound circuit will need to be traced out to solve it, as it appears to no longer be an issue covered.
fortunately the sound circuit is very strait forward, any electronics tech should have no issue trouble shooting it.
the speaker is driven off the headphone jack directly.
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: Alexander78 on December 18, 2011, 08:35:22 PM
ok thank you,  thesteve
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: constantt on December 21, 2011, 01:55:33 PM
Dear All,

Thanks for your contribution on repairing PCE GT/TE!  :D

I've already successfully fixed the sound problem with replace the 16V 100uF cap.  However, I've also experienced the dark screen problem on my GT & I've tried to reaplce the 35V 4.7uF cap with a 50V 4.7uF (since I cannot find a 35V 4.7uF cap anymore).  The back light came back, however it's going too light, even I adjust to the lowest brightness, it's still too light.  Any suggestion on this?

Looking forward to your reply

Best Regards
Constant
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: HercTNT on December 21, 2011, 03:13:06 PM
mouser or digikey should have the capacitor your looking for.  Ask thesteve about the backlight, he recently repaired a gt for me and can most likely help.
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: BlueBMW on December 21, 2011, 03:27:55 PM
Dear All,

Thanks for your contribution on repairing PCE GT/TE!  :D

I've already successfully fixed the sound problem with replace the 16V 100uF cap.  However, I've also experienced the dark screen problem on my GT & I've tried to reaplce the 35V 4.7uF cap with a 50V 4.7uF (since I cannot find a 35V 4.7uF cap anymore).  The back light came back, however it's going too light, even I adjust to the lowest brightness, it's still too light.  Any suggestion on this?

Looking forward to your reply

Best Regards
Constant


If the screen is staying too bright even with the contrast adjusted all the way down, its usually because your batteries are almost dead.  Try a fresh set and see if that makes a difference!
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: constantt on December 22, 2011, 04:17:53 AM
Dear All,

Thanks for your contribution on repairing PCE GT/TE!  :D

I've already successfully fixed the sound problem with replace the 16V 100uF cap.  However, I've also experienced the dark screen problem on my GT & I've tried to reaplce the 35V 4.7uF cap with a 50V 4.7uF (since I cannot find a 35V 4.7uF cap anymore).  The back light came back, however it's going too light, even I adjust to the lowest brightness, it's still too light.  Any suggestion on this?

Looking forward to your reply

Best Regards
Constant


If the screen is staying too bright even with the contrast adjusted all the way down, its usually because your batteries are almost dead.  Try a fresh set and see if that makes a difference!


Hi BlueBMW,

Really thanks for your help & it's work perfectly after I changed the battery!!  Sorry for boring you guys!!

Best Regards
Constant
Title: Will teh NightWolve successfully repair his TurboExpress or fail miserably ? ? ?
Post by: NightWolve on April 27, 2012, 06:13:49 PM
** Organized TurboExpress Part List (4-27-2012)

Qty.
Part #
Description
Price
Ext. Price
6493-2088-1-ND (http://search.digikey.com/us/en/products/UWX0J101MCL1GB/493-2088-1-ND/590063)"CAP ALUM 100UF 6.3V 20% SMD"
0.44
$2.64
3493-2105-1-ND (http://search.digikey.com/us/en/products/UWX1C101MCL1GB/493-2105-1-ND/590080)"CAP ALUM 100UF 16V 20% SMD"
0.47
$1.41
2PCE3859CT-ND (http://search.digikey.com/us/en/products/EEE-0JA330WR/PCE3859CT-ND/766235)"CAP ALUM 33UF 6.3V 20% SMD"
0.49
$0.98
1P5114-ND (http://search.digikey.com/us/en/products/ECA-0JM471/P5114-ND/244973)"CAP ALUM 470UF 6.3V 20% RADIAL"
0.25
$0.25
1493-2118-1-ND (http://search.digikey.com/us/en/products/UWX1V220MCL1GB/493-2118-1-ND/590093)"CAP ALUM 22UF 35V 20% SMD"
0.51
$0.51
1493-2083-1-ND (http://search.digikey.com/us/en/products/UWX0J220MCL2GB/493-2083-1-ND/590058)"CAP ALUM 22UF 6.3V 20% SMD"
0.50
$0.50
1493-2099-1-ND (http://search.digikey.com/us/en/products/UWX1C100MCL2GB/493-2099-1-ND/590074)"CAP ALUM 10UF 16V 20% SMD"
0.48
$0.48
1PCE4304CT-ND (http://search.digikey.com/us/en/products/EEE-1HA4R7NP/PCE4304CT-ND/946239)"CAP ALUM 4.7UF 50V 20% SMD"
0.71
$0.71
1PCE4643CT-ND (http://search.digikey.com/us/en/products/EEE-1VA4R7AR/PCE4643CT-ND/1718066)"CAP ALUM 4.7UF 35V 20% SMD"
0.50
$0.50
1P1142-ND (http://search.digikey.com/us/en/products/ECE-A0JN470U/P1142-ND/227583)"CAP ALUM 47UF 6.3V 20% RADIAL"
0.30
$0.30
Subtotal
$8.28
Shipping/Tax
~$3.22
Total
~$11.50

Eh, I decided to move over most of this post to my own thread:

http://www.pcenginefx.com/forums/index.php?topic=11660.0
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: Frank_fjs on October 05, 2012, 06:17:55 PM
Need some help guys, very confused at the moment. :)

Trying to work out which caps would be best, should I go for all SMD Tantalum or is that overkill and should I just use aluminium caps instead?

I see that Steve has mentioned using ceramic caps but I can't work out where these should be used, he seems to use a combination of both Tantalum and ceramic?

Also, if someone has the time, could you tell me if these are the right parts?

4.7uF 35V: http://au.element14.com/nichicon/f931v475mcc/capacitor-tant-4-7uf-35v-1-8-ohm/dp/1818596
4.7uF 50V: http://au.element14.com/vishay-sprague/593d475x9050d2te3/capacitor-tant-4-7uf-50v-0-6-ohm/dp/1614982
10uF 16V: http://au.element14.com/nichicon/f931c106mba/capacitor-tant-10uf-16v-2ohm-3528/dp/1818581
22uF 6V: http://au.element14.com/nichicon/f930j226maa/capacitor-tant-22uf-6-3v-2-5ohm/dp/1818568
22uF 35V: http://au.element14.com/vishay-sprague/293d226x9035e2te3/capacitor-tant-22uf-35v-0-6-ohm/dp/9303669
33uF 6V: http://au.element14.com/vishay-sprague/tr3a336k6r3c0600/capacitor-tant-33uf-6-3v-0-6ohm/dp/1615383
100uF 6V: http://au.element14.com/nichicon/f910j107mcc/capacitor-tant-100uf-6-3v-0-25ohm/dp/1818563
100uF 16V: http://au.element14.com/vishay-sprague/tr3d107k016c0100/tantalum-capacitor/dp/1616462
470uF 6.3V: http://au.element14.com/kemet/t495d477k006ate100/capacitor-tant-470uf-6-3v-0-1ohm/dp/1642274

Perhaps a better question to ask, does anyone here sell cap kits for the GT?
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: NightWolve on October 05, 2012, 06:22:21 PM
Definitely go for ceramic/tantalum if you're willing to spend the extra dough. You'll eliminate that very apparent hum in the audio if you avoid standard, electrolytic aluminum caps like I used... :( Yeah, forget my list above there which are for the original SMD aluminum types which are harder to solder back on. Ceramic ones you won't have to worry about polarity and tantalums you will.
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: Frank_fjs on October 05, 2012, 06:40:33 PM
So you can use ceramic caps for all of them?

As an example, for the 4.7uF 35V cap, is this what I'm after?

http://au.element14.com/taiyo-yuden/gmk316f475zg-t/capacitor-4-7uf-35v5v-1206/dp/2112843?in_merch=New%20Products

or

http://au.element14.com/taiyo-yuden/gmk325bj475mn-t/capacitor-ceramic-4-7uf-35v-x5r/dp/1683538

Not really sure what the difference is between the above two caps, aside from price and temperature range. Does it matter which one I get?
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: NightWolve on October 06, 2012, 05:30:40 AM
If you can find them. I found everything in ceramic for my SNES, but they cost more. They used to only cover very small capacitance values, but now you can get them in average values, never as high as aluminum though.

http://www.digikey.com/product-detail/en/C2012X7R1V475K/445-7555-1-ND/2733627

There's one, .70 cents. Seems all surface mount only though. I soldered two of them on, not hard if you prep it.

In the case of the two that you're looking at, I see a size difference. One is smaller than the other, so it's just a matter of space. It's helpful if you measure the spacing where the old aluminum one is and buy one that's about the same length so you don't have to do tricks with extra solder to install them.
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: sparkychan on October 07, 2012, 09:37:07 PM
Like many have said before, thanks to all that helped with the creation of the chart and providing their technical knowledge to this thread. I am going to begin the process of replacing all the capacitors in my Turbo Express. One question I had was how most remove the white epoxy-like substance near the large 100uf  capacitors? I'm having trouble exposing the solder points for the capacitors.

Any help would be appreciated.

Thank you!
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: NightWolve on October 08, 2012, 04:34:38 AM
Yeah, that was hard. I used a fresh razor blade for that.
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: thesteve on October 08, 2012, 05:27:15 AM
sharp knife here
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: sparkychan on October 08, 2012, 04:55:32 PM
Thanks for the replies. Ugh, I think my attempt was too aggressive and may have chipped the component that is concealed by the epoxy. Does anyone know what the component is that is underneath the epoxy?

Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: thesteve on October 08, 2012, 06:23:29 PM
its a choke (coil of wire)
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: Frank_fjs on October 09, 2012, 05:10:47 PM
Any reason why I couldn't use a 'Tag Tantalum Capacitor' in a few spots?

(http://www.jaycar.com.au/products_uploaded/productLarge_4567.html)

I can get them locally for quite cheap, specifically:

4.7uF 35V
33uF  6V

^ Seeing as these relate to audio/video I thought it might be better to use the Tantalums here.

Can also get the '10uF 16V' & '22uF 6V' in a tag tantalum but am not sure if there's a benefit to doing this, what are these caps responsible for anyhow?

I was planning to use standard electrolytic caps for the rest, just for the sake of cost/availability and ease of install.
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: thesteve on October 10, 2012, 04:57:02 AM
yes you can use them, but uprate the voltages on most
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: maverick1978 on October 30, 2012, 06:30:26 AM
Does anyone sell ceramic/tantalum cap kits for the TE? - I can find all the radials I need, but searching through other types of caps really confuses me (electronics newbie here, though I can solder pretty much anything)
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: thesteve on October 30, 2012, 06:51:04 AM
i use size 1206 ceramics (they fit well)
a ceramic is non-polarized (can be installed either way)
ceramics handle ripple well (no need to use higher voltage ratings)
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: NightWolve on October 30, 2012, 06:55:58 AM
yes you can use them, but uprate the voltages on most

Hey steve, pretty much every capacitor just needs to be above 16 Volts, correct ? All capacitors could be replaced with 16 Volt or better models as long as the capacitance value matches, right? That is how I have understood things. I mean, 10 Volts comes into the motherboard, the regulator steps the voltage down to 5V for most operations, etc. there is never anything that steps the voltage back up, is there ? Since the power supply is not a more expensive well-regulated one, you do have 13 Volts, not ~10 Volts exactly coming in, but yeah, as long as everything is 16V or above, it'd work fine, right ???

See, I made the mistake in believing I had to match the voltages exactly as well when I ordered the caps for my Express... But I could've purchased all of them as 16 Volts or above... All that happens with higher voltage rated caps is that you pay more and they're bigger, but as long as the capacitance value is the same, they'll function the same, isn't that pretty much the case ??

ERR: I was asking about a Duo, hence the 10V rated power supply coming in, but same deal with an Express that has 7V coming in... which in that case, everything probably could be a 10V rated cap at the minimum, but probably still better to have all 16V rated ones, eh?

The one real question I'm asking is, could I just buy ALL caps at 16 Volts or what, ALL caps at 25 Volts to avoid this "ripple" concept you're mentioning ?? What is the ONE minimum voltage breakdown rating that I could buy for ALL capacitors on the board ??
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: thesteve on October 30, 2012, 08:55:29 AM
on the duo no step-up, however the express does use 2 inverters producing higher voltages.
check the voltage across the cap before subbing it
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: NightWolve on October 30, 2012, 09:19:13 AM
Aaaaah, OK, so there is a "step-up" in voltage at times, via what you're referring to as an "inverter," hence the max voltage rating that the manufacturer chose matters in such an instance, and you say that is a valid concern when it comes to an Express, but not the Duo. That makes sense. I was thinking, why did NEC put 50V caps over here, then 16V caps over there, when the motherboard operates at 7-10V, why not just get all 16V caps, you know? I figured there's possible spiking or step-up in voltage at times or something.

I answered my other concern about a 3.3uF capacitor for the Duo that's at 50V, that is, real small capacitance values come in high voltages (like ceramics) most of the time, so you don't find 3.3uF at 16V or something, they make 'em mostly at 50V and they're still pretty small for electrolytic aluminum type. Something Red Ghost had said made me think there was a spike in voltage for that 3.3uF, but that's not the case for the Duo as you say; it's just that small micro-farad value caps generally come in 50V ranges like under 47uF. The closer the capacitance value is to the traditional ceramic range for an electrolytic, the more likely it can handle 50V, etc. Seems like.

Well, I think I understand the rest of my concerns now although I'd like to hear more about this "ripple" concept you mentioned and how that should guide the substitution. Danke!
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: thesteve on October 30, 2012, 04:20:14 PM
ripple causes heat
ripple can also damage polarized caps when the discharge current causes a polarity flip internally
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: NightWolve on October 30, 2012, 04:25:15 PM
Hence why AC non-polarized ceramics are better. Gotcha. Well, I had a bad experience when I switched to all ceramic with my SNES, so now I'm paranoid about going that route. Blew $11 bucks and then I switched back to cheap electrolytic anyway....  :roll:
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: bust3dstr8 on November 17, 2012, 09:08:24 AM

Text version for the people that prefer this style :)



CC100   100uF   16v
CC101   33uF   6v
CC102   33uF   6v
CC103   100uF   6v
CC104   100uF   6v
CC500   100uF   16v
CC501   4.7uF   35v
CC502   4.7uF   50v
CC503   22uF   35v
CC504   100uF   6v
CC505   100uF   6v
CC700   100uF   6v
CC702   470uF   6.3v
CC703   100uF   6v
CC704   10uF   16v
CC900   100uF   16v
CC901   22uF   6v

Controller PCB Cap:
N/A   47uF   6.3v

(http://console5.com/techwiki/images/b/bb/Turbo-Express-Cap-Map.gif)
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: cosmos99 on January 13, 2013, 09:19:38 PM
Here is the parts number listing at Digikey , note that those are exactly the same as used in the GT/TE or close when unavailable,none of those is bigger, some just shorter in height wich is not a problem:

Surface mount:

3 x 100µF 16v PCE3879CT-ND
6 x 100µF 6v PCE3852CT-ND
2 x 33µF 6v PCE4560CT-ND
1 x 22µF 35v PCE3952CT-ND
1 x 4,7µF 50v PCE4304CT-ND
1 x 4,7µF 35v 565-2114-1-ND
1 x 10µF 16v 565-2442-1-ND

On holes:

1 x 470µF 6.3v 399-6611-ND
1 x 47µF 6.3v P957-ND  
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: override on January 31, 2013, 01:46:09 AM
Nice to see this forum is still kicking! Whats up nightwolve, been a LONG TIME :)
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: NightWolve on January 31, 2013, 06:46:36 AM
Nice to see this forum is still kicking! Whats up nightwolve, been a LONG TIME :)


Hey there! Uh, did I know you by another alias? override doesn't ring a bell.

Hence why AC non-polarized ceramics are better. Gotcha. Well, I had a bad experience when I switched to all ceramic with my SNES, so now I'm paranoid about going that route. Blew $11 bucks and then I switched back to cheap electrolytic anyway....  :roll:


I thought I'd mention an update while I'm at it with regards to this. I believe I figured out the problem when it comes to replacing standard aluminum caps with high-capacitance ceramic equivalents. First off, I highly recommend that everyone purchase a Digital Multi-Meter that can measure capacitance for cap replacement jobs. Very important I think! I'm extremely happy with the Vicky VC99 (http://www.pcenginefx.com/forums/index.php?topic=13670.0) I recently purchased that can measure caps as small as 40nF.

OK, so anyhow, here's why it's important to have this feature: every cap in your kit has a different value than what is stated, ceramics are usually a lot lower and aluminums are usually somewhat higher. If it's a 100uF cap, if might actually read 120uF or 95uF, all varies. So before you replace a cap with a new one, you can test each one with a good DMM (if you get one) and pick out the best from the lot that you bought! Not all are created equal, etc.

Now, here's the deal with what happened with my SNES. I bought 2.2uF, 10uF and 100uF in ceramic. Expensive, but hopefully lifelong and would never leak, so cool deal right? Well, after doing a full replacement, it looked like everything was working fine, but when I tried Super Street Fighter II, when Ryu does his opening fireball and the screen goes *full* white and bright, the TV would lose sync and right before at the top, it'd look like say what electricity would, etc. I played around using a resistor in between the Luma output which would fix it, but you'd lose the perfect contrast that the SNES outputs because the thing has a rock-solid Luma to begin with and doesn't need to be messed with... Not an acceptable solution.

Anyway, I finally got sick of this, and I declared all of these high-value ceramic caps a big mistake, and I had paranoia in ever using them again. So I put new aluminum caps back in place and everything worked fine again! However, after my new VC99 DMM arrived, I tested all of the ceramic caps that Digikey had sold me (I blew $11 bucks after all!). Here were the results: the single 2.2uF cap came out to 3uF, the 10uF caps were 9.3uF - 9.5uF, BUT, the 100uF caps were like 64uF!!!! They were off by f*cking 40% from the stated value, WAY unacceptable and those were the caps that caused the problem! The Luma/Y amplifier circuit on 1st generation SNES systems has a 200uF cap before going to the Multi-AV out to kill off the remaining 1.35 Voltage. 2 100uF caps are connected in parallel for this. Anyhow, as a result, I put the small 2.2uF and 10uF ceramic caps back on the system and I left the 100uF caps in aluminum...

So, ProTip: Stay away from high-value ceramics (above 10uF) or get a DMM that can measure them for you so you don't get f*cked by one that's way way too low from the stated value!!!

The other thing: Digikey sent me a notice that TDK discontinued manufacture of most of the caps that I had bought from them for this SNES job... (I was like, thanks a lot, a$$holes!) So yeah, my experience may not be reflected by anyone else and any general rules may not apply. Nonetheless, I don't trust a new cap now unless I can pre-measure it before soldering it on and I wanna be able to pick out the best ones first out of the package... The Vicky VC99 (http://www.pcenginefx.com/forums/index.php?topic=13670.0) allows for this, get it! Then throw another dollar to this Chinese seller (http://www.ebay.com/itm/150800600810?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649) for the alligator clips, so you can clip on the leads to a cap for easy testing, and you're all set (it doesn't come with them).

* Discontinued ceramic cap in question (100uF 6.3V):

http://www.digikey.com/product-search/en?x=17&y=14&lang=en&site=us&KeyWords=445-4827-ND

TDK's stated reasons: http://media.digikey.com/pdf/PCNs/TDK/Dipped_Y5V_Disc.pdf

I bought 4 of those f*ckers, and they were ~60-70uF, VERY far off! The aluminums are usually higher than the stated value is what I am finding with my cap measuring DMM.
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: thesteve on February 03, 2013, 08:16:37 AM
the caps are typically allowed 20% unless stated otherwise
your caps were off over 50% and should be considered defective.
i have only used 22uf and lower in ceramic and 100uf tant
the ceramics are more forgiving than tant, and preferred.
often aluminum will be rated @ -20%+80%
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: RTQ on May 25, 2013, 03:55:50 PM
Steve,

I ordered an entire set of aluminum capacitors to fix my TE before finding this site.  I want to reorder everything ceramic now.  Are you saying to just use ceramic ones up to 22uf and then use aluminum over 22uf?  Or can I use ceramic to replace them all?

Should I get the exact Volts with ceramic?  If not, how many volts higher is within allowable range?  Thank you very much!

First Post!
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: BlueBMW on May 25, 2013, 04:48:40 PM
You can go with higher voltage as long as size doesnt cause an issue.
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: NightWolve on May 25, 2013, 08:56:30 PM
RTQ, this is a key point once made by steve: if you can replace all capacitors with tantalums or ceramic on a Turbo Express, you can eliminate the humming sound in the speakers and headphones (it's more pronounced I recall when using headphones).

You can get all values in ceramic at Digikey and the other place that's linked here (mouser, I think), but I am nervous that the values above 10 uF or more will be of lower capacitance than the stated value. I'd bet that's not the case with tantalums, though. Like, if they have a 120 uF ceramic capacitor, I would buy that one and use it for the 100 uF replacements - that'd be my advice... Would be good if you have a DMM that can measure capacitance so you know what's going on exactly... but yeah, point is, the actual capacitance value of a ceramic capacitor is usually lower than what it says it is... While some aluminum caps can be actually higher (significantly sometimes) than the stated value...

As for voltage, the higher the better as Blue says, but that means the capacitor will be bigger, thus take up more space, plus it'll be more expensive! They'll last longer too, being better able to handle "ripples" as it's referred to. Anyway, go 35V+ if you can in ceramic and see what the price is, etc. Ceramics are much smaller compared to aluminums, so I doubt you'll have spacing issues even with the 100 uF ones that you need for a TE.
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: Slypty on February 05, 2014, 02:23:18 AM
Some great info in this repair forum, I'm about to undertake repairing a PC Engine GT, it has no Sound but the video is fine and works well other than that.  I think it's worth the overhaul to put in new caps before something bad happens.

  Anyways, I was wondering if anyone can confirm that the same caps are used in the PCE GT?  I suppose I could just open it up and check, just a bit lazy.  Thanks
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: thesteve on March 05, 2014, 05:42:54 PM
the gt and te use the same main board and controller
all parts match except the te has a 0ohm resistor to bypass region check
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: ltpitt on March 16, 2014, 12:15:16 AM
I have been able to (finally) fix my sound thanks to all this precious info.

My soldering skills completely suck so I want to spend a few words to give courage to other friends out there :)

I had to train because I didn't want to wreck my precious PC Engine so I decided to throw a bit of money into that.

This silly thing helped me a lot:

https://www.futurashop.it/index.php?route=product/product&path=4025_3193_303&product_id=3664

If you're able to deal with this repairing the Pc Engine will be a piece (almost) of cake.

If you are lazy and / or afraid to make mistakes when buying parts a kind french guy sells the whole kit:

http://www.otakus-store.net/en/nec-pc-engine/230-smd-full-cap-kit-for-pc-engine-gt-turbo-express.html

Be sure to grab a third hand and a nice magifier and PATIENCE.

Lots of it.

You can kill your little fellow if you don't abuse of your patience.

Thanks to all the electronics heroes that made my work possible: you are awesome.
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: mickcris on February 23, 2015, 11:40:49 PM
Couple of dumb questions:

When removing the white epoxy from the inductor, i exposed part of the windings.  Just wondering if I need to cover back up with something?  Not sure what the purpose of it was originally.

Also, can you replace 2 through hole caps with ceramic/tantalum?  I mostly saw in this thread talking mainly about the surface mounts being replaced with them.  Don't think these would be any different though, but not 100% sure.  The through hole cap on my controller board seems to be the one that has leaked the worst.

thanks.
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: Keith Courage on February 24, 2015, 07:17:52 AM
Make sure the wiring for the inductor is still connected to its traces on the board. Sometimes when uncovering it one end can snap off. I've used a two part epoxy to cover it back up in the past when I've accidentally uncovered it. Not sure if it needs it but it can't hurt anything to cover again. I'm sure hot glue would work nicely as well.

Use any kind of caps you want.
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: Necromancer on February 24, 2015, 08:00:33 AM
I'm sure hot glue would work nicely as well.

Thanks for the tip, Drakon.  :mrgreen:
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: NightWolve on February 24, 2015, 08:01:09 AM
I love hot glue, for the record.  :mrgreen: So damn useful!
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: mickcris on February 24, 2015, 10:15:16 AM
Make sure the wiring for the inductor is still connected to its traces on the board. Sometimes when uncovering it one end can snap off. I've used a two part epoxy to cover it back up in the past when I've accidentally uncovered it. Not sure if it needs it but it can't hurt anything to cover again. I'm sure hot glue would work nicely as well.

Use any kind of caps you want.

Thanks, its still connected so ill just cover it back up to be safe.

edit:

replaced all the caps with ceramics/tantalum and its working great.  also covered up the inductor in hot glue as it was the easiest.
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: scoobs22 on June 26, 2015, 05:31:00 PM
Hi all.. this is my first post here, and this looks like a really cool and helpful community. So this may be a hail Mary, considering the thread is so old... but here goes.

I bought a TE on eBay recently, and it was advertised as "in great shape." It works, and the headphone audio is fine, but the speaker hardly makes a whisper. There's a little bit of image ghosting on the screen, too. From what I've read, this is all likely the result of bad capacitors.

Now, I've done a little bit of soldering to replace batteries in NES games and such, but I'm still a total amateur. So this was a bit too much of an investment for me to feel comfortable messing with it myself. Is there anyone here located in the US who could replace all the capacitors for me? If you're experienced with TE repair and can do the job, please do send me a PM.

Thanks!
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: MotherGunner on June 26, 2015, 05:36:55 PM
Welcome! Hit up guys like thesteve, and keith courage.  They will do the repair work for a price that's well worth it.
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: 780racer on February 10, 2016, 03:34:16 PM
I just want to thank everyone in here who has helped make this place so awesome. Got some replacement caps, and last night replaced them all in the express I got from a local retail store for dirt when they found out it didn't work.

I can not OBEY on the GO!. Woot. (I'm just excited I fixed something that was broken... Its always exciting)
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: Keith Courage on October 04, 2017, 10:33:05 PM
(http://www.tapatalk.com/groups/pcengine/imageproxy72fd.jpg?url=http://i130.photobucket.com/albums/p266/Rockguard/Express/ExpressCapreplacementchart31.jpg)
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: xybots on February 20, 2022, 03:42:15 PM
Hi All

Ive just recapped my PC Engine GT today, and every cap had leaked I didn't have a 4.7UF 50V so I used a 4.7uf 35V and it worked a charm.
I was wondering would I do any damage to my PC Engine GT as I should of replaced it with 4.7UF 50V.

The Pc Engine GT is working great but just wanted to make sure if it ok to use 4.7uf 35V

thanks
 
Title: Re: REPAIR GUIDE - TurboExpress: Total capacitor replacement chart
Post by: MasterofBiscuits on February 22, 2022, 06:52:57 AM
50v is the maximum rated voltage the cap can handle, so using a lower voltage is not advisable. I would replace it with one of the correct voltage ASAP.