REPAIR GUIDE - TurboExpress: Total capacitor replacement chart

[BlueBMW]

The board layout is the same US and JPN with regard to capacitors.

[Alexander78]

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)

[BlueBMW]

In theory electrolytics will last 15 years or so, often longer.    If you change to solid caps like ceramics they should outlive you

[Alexander78]

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)

[thesteve]

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

[Alexander78]

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 ?

[thesteve]

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.

[Alexander78]

Thanks thesteve, BlueBMW for the info.   

[Alexander78]

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  ?

[thesteve]

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

[Alexander78]

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 ? ?

[thesteve]

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

[Alexander78]

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 ?

[thesteve]

some good pics would be helpfull (pics of the board and the video defect)

[Alexander78]

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 ?