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[Console Repair/Mod Center / Re: REPAIR GUIDE - TurboDuo: Sound Fix]

I'm still looking for someone that lives in California that can change out the remaining caps and fix my PC Engine PAC. I am dying to get this working. Please respond.

[Console Repair/Mod Center / Re: REPAIR GUIDE - TurboDuo: Sound Fix]

Is there anyone in here that can replace all the caps in my PC Engine PAC? I already did the majority of them, but got no results at all from changing them. I am willing to pay a lil to get the rest of them swapped out with new ones if that will fix my sound issue I am having. I live in California. Please someone PM me and let me know. I am tired of owning a faulty PC Engine PAC, and want to see it work again someday. The only problem it is having is it had staticy sound coming from the left speaker during games. After changing out a ton of caps it now has no sound fx coming from the left speaker even though music works fine.

[Console Repair/Mod Center / Re: REPAIR GUIDE - TurboDuo: Sound Fix]

General notes-
C301, 307, 308 are raw power supply filtering. 

For CD audio (sourced at U103 PCM decoder), start at U201 (DAC), come out stereo to U202 filter (caps C205,C206 significant here),through U203 amp/filter, through U504 audio gate, into U505 (caps c617,c618).  Out U505 (through caps c613,c614  -- also, c616 sets frequency response) to U506, out U506 (caps c604,c610) to AV output connector.  Same signal also fed to U507 amp/filter (through caps c670, c671), then output (via c678, c679) to headphone connector.  U507 also uses caps c675 and c676 to set its filter operation. 

For game audio (sourced by U901), come out stereo through caps c878 and c879 into U506, continue as above. 

For ADCPM audio (sourced by U502), come out mono through cap c652 to passive filter (uses c623), to one-half of U503 amp  , out U503 (cap 653) through passive filter (uses c621) to other-half of U503, into U504 audio gate (both channels), continue as above.

C526 is the VCC cap for U515, the 512K ROM.

C323 is regulated power filtering.

Somebody should start tracking this stuff in one of the "sticky" posts, maybe as a table of what cap does what.

Good luck.

Charlie

So this information is good for Turbo Duo users only or what? I cant find the caps you listed at all in my PC Engine PAC.

[Console Repair/Mod Center / Re: REPAIR GUIDE - TurboDuo: Sound Fix]

...replaced every cap that I could (some have strange info on them so I don't know what they are so I could not do all of them)...

This probably isn't what you want to hear, but it might be one of the unidentified caps.  Sorry I can't be on any real assistance. 

If I took pics of the thing can you guys help me then? I mean, I know the PC Engine PAC is rare as hell and nobody has one, but still it is very much like a regular turbo duo just smaller, so there should be ways to repair this unit. I dont care if I must replace every cap on the unit, (theres not many left to replace) I just need to know the values of the caps to buy some new ones. They have weird values on them for example...the ones that read 10  and 16v... were replaced with 10uf caps at 16volts each. The cap that said 47 16s was replaced with a 47uf cap at 16volts..  which should be fine but then I have a TON more with 100  6s on them (Im guessing its 100uf at 6volts?)  and a bunch more with 22  6s  37c on them  which I can only guess would be 22uf at 6 volts?  any ideas?  Anyone here with a LaserActive system that can repair this for me???

[Console Repair/Mod Center / Re: 8PDT Slide and Push Button Switches for Region Modding!]

Premade PCB Chips are still made....There is one site I have found them at for sale.....Although I have not tried to buy one yet. Check www.multimods.com

That is D-lite, no one has heard from him lately as you may have heard. Feel free to send him some $$$ and see what happens.

This is the switch I use now (I used to use old slide switch, u can see pics of it in the web page in my sig):




I am curious on the price u got, not a bad deal. I just think you will have a hard time getting more than 30 purchased on a group buy.

m sorry I dont know what I was thinking it was (5) SPST Switches (I think) He mounted them on the cover for the expansion slot....I may be a little off but I have seen it....Infact here is the link

Im probably off on this one but atleast you can see something of what Im talking about...

My gawd, that is the worst mod ever!!!!

Can you install this push button switch for region mod on a PC Engine PAC for LaserActive?

[Console Repair/Mod Center / Re: No ADPCM sound.]

I have ADPCM issues also along with regular sound fx issues..

[Console Repair/Mod Center / Re: REPAIR GUIDE - TurboDuo: Sound Fix]

Well, since nobody can help me here I decided to go ahead and do it myself. I ordered a ton of capacitors from allelectronics.com and when they got here yesterday I went ahead and shotgunned the PC Engine PAC and replaced every cap that I could (some have strange info on them so I don't know what they are so I could not do all of them), but to no surprise I have the same problem still. No ADPCM or Sound FX from the left channel. It did however make the sound fx and ADPCM sound from the right channel crystal clear and loud again. So I guess it was not a total waste of time. But I still cannot hear any sound fx or ADPCM from the left channel...any ideas? please help!

[Console Repair/Mod Center / Re: REPAIR GUIDE - TurboDuo: Sound Fix]

I am also having this issue with sound crackle only mine is with my PC Engine PAC for the LaserActive. I replaced one of the capacitors as mentioned for the Duo and the crackle sound has stopped, but now I have no sound fx or ADPCM sound coming from the left speaker at all, but the CD audio works perfectly for both speakers. I can't believe my PAC is affected by this issue. I seriously don't wanna ruin my PC Engine PAC by ripping traces prying off these caps and replacing them as the PC Engine PAC is rare and expensive. Anyone know of Pioneer repair shops that fix these things?