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[Console Repair/Mod Center / Re: No video/audio through Super CD-ROM² output]

Yes, I cleaned it first with isopropyl alcohol and cotton swabs, but it didn't work for me.

[Console Repair/Mod Center / Re: No video/audio through Super CD-ROM² output]

I got desperate, and I washed the pcb using a hose, a toothbrush, and Palmolive. Now, the sound is perfect! 

[Console Repair/Mod Center / Re: No video/audio through Super CD-ROM² output]

What a maze! I finally found where pin 4 is connected. It's connected to 2 diodes, which are connected to some transistors, near the 1000µF cap:



That's it for today... LOL!

[Console Repair/Mod Center / Re: No video/audio through Super CD-ROM² output]

Hmm... Right now, it's 1.02V. I removed that cap, and it was pretty clean. I cleaned it again though.
It made no difference.

I'm going to verify all the traces related to that pin.

Thanks!

[Console Repair/Mod Center / Re: No video/audio through Super CD-ROM² output]

I turned up the volume, and there's sound! Low crackling sound though.

I read that was your problem pnauts. So, I think I just need to clean the pcb. Let's see...

[Console Repair/Mod Center / Re: No video/audio through Super CD-ROM² output]

Thanks for your response pnauts!

There was a broken trace between C305 and R306. Now, I have video, but still no audio.

I've checked the values of every pin and now they're pretty similar to your values:

1 = 7.97V
2 = 2.96V
3 = 3.09V
4 = 5.58V
5 = 7.70V
6 = 0V
7 = 0V
8 = 4.92V
9 = 0V
10 = 2.72V
11 = 0V
12 = 5.58V
13 = 3.1V
14 = 2.95V

At least, now I know that the M51131L is fine.

[Console Repair/Mod Center / No video/audio through Super CD-ROM² output]

Hi guys,

I bought a Super CD-ROM² with no sound, and when I tested it out there was no video/audio through Super CD-ROM² output.

If I connect the A/V cable to the Core Grafx, the games play perfectly, but obviously with no CD audio. I've replaced all the capacitors and there's no difference.

The volume balance IC (M51131L) has only 0.77V as supply voltage.

I would be happy, if I could fix just the audio. For video, I can have the RGB mod.

Any ideas?

Regards,
Raulie

[Console Repair/Mod Center / REPAIR GUIDE - Super CD-ROM²: Total Capacitor Replacement Chart]

Does anyone know what happens when the RF shields aren't installed?

[Console Repair/Mod Center / Re: PCE Interface Unit IFU-30A Repair - Black screen for CD games]

Have you tried to format it? There's a capacitor for saving data (C101). It can be replaced with a MAL219612473E3.