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[Console Repair/Mod Center / Re: Turbo Duo CD-Rom issue]

On a whim, I pulled IC107 and noticed a ton of corrosion underneath the 4558. Vias were totally eaten away, so I ran a couple of jumper wires around to the other side for pins 6 and 7, and now the CD drive, while it still spins with the CD door open, runs at about half speed, and the laser, which had been moving and sticking to the center of the drive, runs to the outside of the drive and sits in place.

I guess it's a step in the right direction. I'll keep looking for more bad traces or vias in that area of the board.

[Console Repair/Mod Center / Re: Turbo Duo CD-Rom issue]

Hate to bump, but I'm having the exact same problem except on a PC Engine Duo.

I've checked every trace around the LED and I've even tried replacing the CXA1082B thinking that might have gone bad, to no avail.

Essentially, both the laser motor and CD spindle turn at full power when switched on regardless of the console lid switch's position. I can't see any particular traces that have been damaged and am getting continuity through to both sides of the board as far as I've tested.

IC109 (the top BA6290A) gets extremely hot within a few seconds of switching on the console, which I attribute to both CD unit motors going nuts. If I disconnect the CD unit motor loom, it doesn't heat up at all. I have a couple of replacement BA6290A's on order in case those are the issue, but I somehow doubt that's it.

I've done a capacitor swap to the entire console and the HuCard side works flawlessly.

Anyone have any additional thoughts or things I can try? I have access to a scope and multimeter.

[Console Repair/Mod Center / Re: PCE DUO - R691 value?]

Oh, disregard. Spotted it in a repair video. I guess it's 15k ohms.

That said, is there any easy way to look these sort of things up rather than hunt for high-res pics of the board?

[Console Repair/Mod Center / PCE DUO - R691 value?]

Hiya, first blood.

I recently picked up a PC Engine Duo off ebay and was doing a recap with a hot air station. I had C610 pop while heating, and it blew off R605, D601 and R691 along with it. I should've known better.

I was able to recover R605 and D601 and put them back, but I cannot, for the life of me, figure out where in my work area R691 flew off to. Anyone know what the resistor value of that one is so that I can order a replacement? Or is it even necessary for running the console?

Thanks in advance.