Topics

[Console Repair/Mod Center / PC Engine GT help identifying parts]

Hello.
I'm trying to fix a PCE GT thats been sent to me. It powers up and shows an image for about 3 seconds then starts to flake out with unstable image, then fades out completely. nothing cna be seen after that.
Someone has done an awful job ar recapping this in the past, but I'm trying to identify some transisters.
https://photos.app.goo.gl/EetXV0dGvaH2Yvtv1

I have heard that the transisters at Q900 and 901 can be problematic, and these ones look like they have fungus growing on them lol. Can anyone tell me what the 3 smaller ones are? I'm going to remove them and clean the board, but I might as well replace them.

It also has no sound at all, just a static hum, but I'll look at that after the video.

[Console Repair/Mod Center / ADPCM]

Hello.
I'm fixing a couple of PCE Duo's and want to check ADPCM after changing OpAmp IC503.
Can someone tell me a title of a CD game that uses ADPCM and when I should hear it?

I can easily tell if Hu-card and streaming CD audio is working (which it is but no idea when and where ADPCM is used.

Thanks

[Console Repair/Mod Center / Duo music/cd volume]

Hello. I'm trying to fix a black PC engine duo. The sound is working correctly for the HU card games, but very faint for the CD background music.

I have done a complete re-cap, and initially everything worked. Then the next day NO SOUND at all.
After days of poking around I fixed a couple of traces and replaced the 2 op-amps under the board, and the one at the AV jack.

I reassembled and found the CD volume is very low on both the AV and headphone jack.

Can someone tell me which caps and amps are for the CD drive?
Thanks