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I reflowed all the joints, same issue :( I suspect le GA20 :'( I ordered a YM2151 I'll change the one I have since I'm not able to test it and it's not expensive

I replaced all the capacitors, I think it's the lightening. The resistances that I replaced had the right mesurements once removed. I'll rework the joints with fresh solder and see if I get better result

Can someone help me figure out the right resistor values of the following : R1 470KOhm R201 1KOhm R2 470KOhm R202 Not...

I replaced the following resistors : R201 – 1KOhm R203 – 100KOhm R205 – 4.7KOhm R208 – 4.7KOhm R209 – 2.7KOhm R211 – 10KOhm R213 – 10KOhm Still got no sound :(

is it possible that the resistors could be the culprit ? They seem to be in bad shape

@ShootTheCore thanks for files it seems that the site is down :( (needed to check some repair logs

How do I test the following components : input output MB3730A Pin1 Pin5 JRC 064D Pin2/3 Pin1 MC3403 Pin6/5 Pin7 (According to the datasheets I need to test the pins listed above) Now I have the tools, I just need someone to help me :)

Thanks guys :thumbsup:

Crystal System bundle sold.

Hi gals and girls, The JAMMArcade donwload section seems to be dead :( https://jammarcade.net/programs/ Where can I find Porchy's BINMan zip to download ? I have written to Porchy but I didn't get any answer :/ Thanks

Now I have audio probe :) It's not the amplifier something wrong elswhere

Sorry for having been out of business for a long time, I've updated this old sales thread with some stuff, feel free to pm me if you have any questions

Anybody can help me with the resistors values ? I can't identify them on my board :( I'll change them and see if the problem is still here

Not yet in stock or already out of stock at VGPerfection :/ Any other supplier in Europe ? Thanks

They match up fine

Hi, My USB decoder worked fine since 2016 and now I have an issue with one direction (down) all other stuff works fine. I succeeded in updating the firmware but I still have the same problem :( Can someone help me ?

1) AMP ok, I can hear crackling 2 My Rom Board works fine with another mother board, Do I have to dump the Roms anyway ? 3) Can you point me to Sound CPU number ? I don't want to make a mistake :) Thanks

Yes, there is some corrosion, but I did a continuity check and it's OK, I cleaned with 95° alcohol No lifted pads,

Hello Guys and Gals, I got a working Irem M92 Hook game but with no sound. So I first started by removing and changing all the brown capacitors. I still have no sound. My skills an tools are limited but I would like to learn. I swapped Mother Boards and I got sound. Rom Board is original. I...

A dead back among the living digging up graves :) What is the status of this ? I'm interested in both options