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NEC TG-16/TE/TurboDuo => TG/PCE Repair/Mod Discussion => Topic started by: MobiusStripTech on September 04, 2017, 12:40:26 PM

Title: TurboExpress/PC-Engine GT Screen and A/V Out Boards
Post by: MobiusStripTech on September 04, 2017, 12:40:26 PM

Hey Guys,

I made a couple small PCB's and put them up on OSHPark for anyone who wants to order them. These are based on thesteve's circuit for modding your TurboExpress or PC-Engine GT for a new screen or A/V Out. While the circuit can obviously be built without these, I just think it's a bit cleaner than using perfboard or building a circuit on top of the 6260.

TurboExpress/PC-Engine GT Screen Mod Only Board
https://oshpark.com/projects/fAyYocPK/

TurboExpress/PC-Engine GT Screen Mod and A/V Out Board
https://oshpark.com/shared_projects/SAfzq1dI/

Title: Re: TurboExpress/PC-Engine GT Screen and A/V Out Boards
Post by: MobiusStripTech on October 02, 2017, 02:37:22 AM

Just a note, I have now installed these and can confirm they work just fine. It definitely helps keep everything clean.

Title: Re: TurboExpress/PC-Engine GT Screen and A/V Out Boards
Post by: RxM on October 02, 2017, 03:00:13 PM

I'm interested in purchasing 2pcs
You except PayPal?  how much are  they? and Do you provide instructions guide?


Thanks Regards
RxM
 

Title: Re: TurboExpress/PC-Engine GT Screen and A/V Out Boards
Post by: MobiusStripTech on October 03, 2017, 03:36:55 AM

Yeah I can sell you prebuilt ones if you want. Do you want the ones with or without the AV out? The circuit is slightly different if you want AV out or just a screen mod. I can give you some instructions as well. All of this is based on the circuits and findings that theSteve posted on here. I just made a board to contain the circuit.

You will still need to lift the pins on the huc6260 and obviously make those connections. Just let me know which boards you want.

(http://scontent.fash1-1.fna.fbcdn.net/v/t1.0-9/21765207_341177199660484_619285591567818_n1501.jpg?oh=ac6b69b1f7919168514720418d436530&oe=5A456B31)

Title: Re: TurboExpress/PC-Engine GT Screen and A/V Out Boards
Post by: RxM on October 03, 2017, 11:57:40 AM

I would like the prebuilt 2pcs  that will do both LCD and AV out

How much for 2 pcs ?





Thanks
RxM

Title: Re: TurboExpress/PC-Engine GT Screen and A/V Out Boards
Post by: MobiusStripTech on October 03, 2017, 12:07:13 PM

If you are in the US probably $10 shipped.

Title: Re: TurboExpress/PC-Engine GT Screen and A/V Out Boards
Post by: RxM on October 03, 2017, 12:09:43 PM

Ok Great......You except PayPal?   If yes   what is your papal email address so i can send you payment

Title: Re: TurboExpress/PC-Engine GT Screen and A/V Out Boards
Post by: MobiusStripTech on October 03, 2017, 12:14:10 PM

Mobiusstriptech@gmail.com

Just make sure you put your address.

Title: Re: TurboExpress/PC-Engine GT Screen and A/V Out Boards
Post by: RxM on October 04, 2017, 04:41:10 AM

I just sent you a PayPal payment of $10.

Please let me know when it shipped.


Thank you

Title: Re: TurboExpress/PC-Engine GT Screen and A/V Out Boards
Post by: MobiusStripTech on October 04, 2017, 06:06:11 AM

Below are images of the test install I did.

(http://scontent.fash1-1.fna.fbcdn.net/v/t1.0-9/21761734_341277262983811_5779845555543913428_n10f7.jpg?oh=7f0188f6aeefb438212a0319090fe5c4&oe=5A49F0E4)

(http://scontent.fash1-1.fna.fbcdn.net/v/t1.0-9/21765245_341277312983806_8519419044183851662_nf0f1.jpg?oh=58b732cc2d91e9852eb5ecd31ae7a555&oe=5A83C249)

Title: Re: TurboExpress/PC-Engine GT Screen and A/V Out Boards
Post by: RxM on October 08, 2017, 09:52:18 AM

Hey MobiusStripTech,

I got your package.. Thank you!

The two pics you posted , the first one is showing the pins of the chip that needed to be lifted and they all
need to be grounded to same wire?

And what’s the second pic for? 

Thanks
-RxM

Title: Re: TurboExpress/PC-Engine GT Screen and A/V Out Boards
Post by: MobiusStripTech on October 08, 2017, 05:05:40 PM

Just a potential mounting point. You can put them pretty much anywhere you want because they are so small.

The pins that need lifting can be individually hooked to ground or you can hook them all together and then to ground. The latter is easier.

Title: Re: TurboExpress/PC-Engine GT Screen and A/V Out Boards
Post by: Keith Courage on October 08, 2017, 05:18:57 PM

Quote from: RxM on October 08, 2017, 09:52:18 AM

Hey MobiusStripTech,

I got your package.. Thank you!

The two pics you posted , the first one is showing the pins of the chip that needed to be lifted and they all
need to be grounded to same wire?

And what’s the second pic for? 

Thanks
-RxM

(https://s1.postimg.org/33bjpfvllb/pce_Composite_Video_repair.gif)

Title: Re: TurboExpress/PC-Engine GT Screen and A/V Out Boards
Post by: MobiusStripTech on October 08, 2017, 05:34:40 PM

Thanks for that Keith.

RxM, that is the circuit schematic these boards are built from. So basically just lift and ground all the pins listed at the top of the schematic. Then connect all the other pins listed to the appropriate points on the board. Then you are good to go.

Title: Re: TurboExpress/PC-Engine GT Screen and A/V Out Boards
Post by: RxM on October 11, 2017, 01:45:26 AM

Thank you MobiusStripTech & Keith Courage.  Your help greatly appreciated.


Regards,
RxM

Title: Re: TurboExpress/PC-Engine GT Screen and A/V Out Boards
Post by: hernan43 on October 15, 2017, 12:45:06 PM

Quote from: MobiusStripTech on October 08, 2017, 05:34:40 PM

Thanks for that Keith.

RxM, that is the circuit schematic these boards are built from. So basically just lift and ground all the pins listed at the top of the schematic. Then connect all the other pins listed to the appropriate points on the board. Then you are good to go.

At the risk of sounding like an idiot what is meant by lifting the pins? My assumption is it means to lift them off of their pads but in the photos it looks like they are still attached to the pads. Sorry for any confusion.

Title: Re: TurboExpress/PC-Engine GT Screen and A/V Out Boards
Post by: MobiusStripTech on October 15, 2017, 01:17:26 PM

No problem at all. Lifting the pins does mean to unseat them from their pads. Ideally you use hot air or an iron and apply heat while using a pick or similar device to separate the pin from the pad. Once it's separate from it's pad, you just connect the pin to ground. Some people do it similar to how I did it, others may connect each pin individually.

In my photo you will see a L shape along the chip connected to a blue wire. I bend each leg up and then solder each one to a component leg from a capacitor. Then I attach a wire to it and to ground.

The other wires you see are all the wires that must be attached for this circuit to work.

Title: Re: TurboExpress/PC-Engine GT Screen and A/V Out Boards
Post by: RxM on October 15, 2017, 02:38:43 PM

Hey MobiusStrip,

In your pic that you have provided wires Red, Blue,Yellow and Green are they soldered to the pins or the pads directly to the HuC6260?.  Please correct me if I'm wrong.  The RED wire gets soldered directly
to pin 41 of the HuC6260 chip or the pin need to be lifted first then the RED wire gets soldered to the pad where the pin was origially lifted? Also pin 41 of the chip is that where i tap to get 5V?. 


Thanks
RxM

Title: Re: TurboExpress/PC-Engine GT Screen and A/V Out Boards
Post by: MobiusStripTech on October 15, 2017, 02:44:04 PM

Hey RxM,

For the soldered wires, just connect them directly to the pins and don't lift those ones. You are correct with pin 41, the red wire connected to pin 41 is pulling 5v and that pin is not lifted. You don't have to pull 5v from there. I just did it for simplicity sake. I hope that all makes sense.

Title: Re: TurboExpress/PC-Engine GT Screen and A/V Out Boards
Post by: RxM on October 16, 2017, 12:32:56 AM

Thank you MobiusStrip.   :D Makes a whole alot a sense now.

Regards,
RxM

Title: Re: TurboExpress/PC-Engine GT Screen and A/V Out Boards
Post by: MobiusStripTech on October 20, 2017, 08:27:26 AM

I should have more of these prebuilt in the next week or so. Just waiting on them to come in from fab and they already shipped to me.

Title: Re: TurboExpress/PC-Engine GT Screen and A/V Out Boards
Post by: MobiusStripTech on October 24, 2017, 02:21:47 PM

For anyone else who wants them, I have more of these rebuilt now. After I run out of these I am not going to be ordering more of either of these circuits.

Title: Re: TurboExpress/PC-Engine GT Screen and A/V Out Boards
Post by: hernan43 on October 26, 2017, 04:55:47 PM

What is the best connector to use to provide the AV out? TRRS?

Title: Re: TurboExpress/PC-Engine GT Screen and A/V Out Boards
Post by: MobiusStripTech on October 26, 2017, 04:58:30 PM

It depends on your preference but I like the TRRS setup. It keeps the case clean. You can also replace the tuner jack with an 8pin mini-DIN or something similar. I have seen people just use a panel mount jack and screw it into the case, but personally that's not what I would do.

Title: Re: TurboExpress/PC-Engine GT Screen and A/V Out Boards
Post by: Duo_R on October 27, 2017, 05:46:06 PM

Interested in some pre built boards.

Title: Re: TurboExpress/PC-Engine GT Screen and A/V Out Boards
Post by: MobiusStripTech on October 27, 2017, 06:22:41 PM

Sure thing. Within the 48 states they are $5 each shipped. Doesn't matter which version. Just let me know how many you want and which style and I can get them out to you. Feel free to pm me if you prefer.

Title: Re: TurboExpress/PC-Engine GT Screen and A/V Out Boards
Post by: MobiusStripTech on November 21, 2017, 01:07:28 AM

I still have some of these, both styles, if anyone wants them. I won't be making any more of them when I run out.

Title: Re: TurboExpress/PC-Engine GT Screen and A/V Out Boards
Post by: ginoscope on November 28, 2017, 03:08:41 AM

I'll be interested in one of the av out boards I will PM you thanks.

Title: Re: TurboExpress/PC-Engine GT Screen and A/V Out Boards
Post by: bdoi on March 30, 2020, 07:28:14 AM

do you use the link jack socket for an A/V out?