Messages

[Console Repair/Mod Center / Re: duo full of problems]

Awesome, thanks for the tip! Yesterday I noticed that the cd laser pot screw also doesn´t turn (any way) so I'm assuming the person that touched this also glued it -_-

[Console Repair/Mod Center / Re: duo full of problems]

Doh! You right, stupid typo. I meant the 6260 and I got the idea from the furrtek reversed lut yuv table (from https://www.furrtek.org/?a=pceyuv)

[Console Repair/Mod Center / Re: duo full of problems]

I was able to mess with the unit today again and after messing with VR103 (turning it more CCW) Rondo now plays the music non stop. The Ys issue still persists (I'm going to trust Steve and maybe try to find a replacement motor). VR102 is functional but looks horrible. Anyway, work in progress but apparently is progressing well. Thank you for your input Steve and thanks NIghtWolve for summoning him I'll come back soon-ish with more details/progress report.

In a side question: Steve, would you know how the Huc6280 digital DACs work? I'm under the impression they receive the 3 bits for each color and just scale them to send the signal but I'm not sure. I'm asking because I'm trying to make a RGB->YUV color lut on the OSSC (I kinda got it working but the image is kinda yellowish and I'm wondering if its the signal getting scrambled somewhere due to noise or maybe I'm misunderstanding the DACs). Thanks once again

[Console Repair/Mod Center / Re: duo full of problems]

Wish I was in the US to get some professionals to do it :/ I'm in south america
I ended up fixing the audio and the caps (it was mostly leak capacitor on the board + bad traces).

My biggest problem now is the cd :/

EDIT: Captured the problem https://1drv.ms/v/c/4b0117f8503301c7/IQCYNZaGSsuzQrV3zSFFDksLAR8HLqT9rehHggXNk4e36SU?e=oVUlTG

[Console Repair/Mod Center / duo full of problems]

Hi everyone,

Found this a amazing community a couple of days ago after buying a duo and felt like I could ask for some help here, sorry if its not the correct place

So...I got this duo on ebay in November. The seller claimed it was recapped which led me to believe it was problem free

I went to play red alert (original disk) and I could play almost-normally but I felt that sometimes it took too long to read the disc.. Since I have some experience in electronics + soldering I decided to open it and immediately found the horrors committed to this beautiful system.

Lots of leaking capacitor fluid still on the board....close to the AV connector it was really yellow. Some capacitors soldered to non-working (now floating) pads. IC506 blackish (even the legs). C315 completely dead. Some vias fully black. The person kinda destroyed VR102. The list goes on and on 

I cleaned whatever I could with a cotton swab and Isopropyl alcohol. I redid some soldering and connected the floating pads directly to their correct place by testing continuity where the traces led. Then I went to the CD.

I tried as best as I could to calibrate the pots by looking at the eye pattern following this guide (https://www.retrosix.wiki/laser-tuning-pc-engine-duo). It still not the best. On Rondo of Blood (CDR) sound test the sixth track stops but the disk keeps spinning. If I try to play Book of Ys, when I get to the talking lady on the first dungeon the laser moves totally to the right and gets stuck there (I have to manually force the track with my fingers in order for it to unstuck). If I turn VR103 CW it stops doing that but also stops reading and the pattern becames a fuzzy mess.

Can anyone give me some tips here? I tried the pots, the eye pattern on the scope looks kinda ok but this problem of getting stuck and the music stopping is very confusing (it sounds like a bad cap because it happens after a while?). Also when playing the CD the music is only coming out on the left channel....

All in all this was a bad experience but it is not completely ruined. I can play HuCard games fine and I was able to install a RGB mod. Thanks for any help