Is it possible to resurrect dead Color Classic logic boards?

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bengi's picture
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Joined: Aug 2 2005
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I have quite a collection of dead CC logic boards, all have been recapped and washed in the dishwasher. Besides recapping what other parts can be replaced? For instance what the three LPs (LP1, LP2 and LP3) are?

How come there are no schematic around.

If anybody had some info I'd apprecited,

Ben

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Joined: Mar 6 2006
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Re: Is it possible to resurrect dead Color Classic logic boards?

I have a 520 logic board that failed suddenly and I'm in the same situation. I know almost nothing about components beyond capacitors but I'm wondering if there might be some kind of tiny surface mount fuses that can be replaced?

Would a bad Logic board capacitor completely stop a CC from powering up?

DJ

eeun's picture
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Re: Is it possible to resurrect dead Color Classic logic boards?

Have you verified with a known working logic board that it is your logic boards, and not the CC's analog board, that's bad?

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Re: Is it possible to resurrect dead Color Classic logic boards?

In my case - yes I have. The stock CC logic board works fine.

bengi's picture
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Re: Is it possible to resurrect dead Color Classic logic boards?

I have now also an LC 525, sort of Mac TV. Well all the three CC logic board ,which I considered dead, do work on the LC and the good LC board dos not work on the CC.

So my CC must have a dead analogue board...

Where do I go from now?

Ben

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PB100, 160, 180, 180c, 190, 190c, 5300cs, 5300c, 5300ce B/W (custom), 5300ce, 1400c 166, 3500, WS 500 MHz (custom), Aluminium 15" 1.25 Hi Res display (custom), Aluminium 1.67 Hi Res, iBook G3 12", iBook G4 14", MacBook white unibody, Classic 40MHz 68030, Classic II, Color Classic (dead), SE, SE/30, LC, LC II, LC 475, Quadra 700, LC 630, PowerMac 4400, 7600 G4 1000 MHz, PowerMac 8600 G4 450, PowerMac G3 700 MHz G4 (custom), PowerMac G5 2.7 LQ (liquid replaced), MacPro 3.2 GHz

eeun's picture
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Re: Is it possible to resurrect dead Color Classic logic boards?

If I recall correctly, on the CC analog board there were two big diodes that got really hot...so hot they tended to discolor the board. Replacing those and any components near them that would have been cooked may help.
Or it might be a connection issue. I had intermittent troubles with one of my CCs on the upper edge connector. And you can always try re-capping the analog board. If you do, it's okay to use a higher voltage rated cap if needed, just don't go lower.

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bengi's picture
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Re: Is it possible to resurrect dead Color Classic logic boards?

eeun wrote:

If I recall correctly, on the CC analog board there were two big diodes ....

thanks, as soon as I have time I will go for a recapping session, probably this coming weekend!

Ben

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PB100, 160, 180, 180c, 190, 190c, 5300cs, 5300c, 5300ce B/W (custom), 5300ce, 1400c 166, 3500, WS 500 MHz (custom), Aluminium 15" 1.25 Hi Res display (custom), Aluminium 1.67 Hi Res, iBook G3 12", iBook G4 14", MacBook white unibody, Classic 40MHz 68030, Classic II, Color Classic (dead), SE, SE/30, LC, LC II, LC 475, Quadra 700, LC 630, PowerMac 4400, 7600 G4 1000 MHz, PowerMac 8600 G4 450, PowerMac G3 700 MHz G4 (custom), PowerMac G5 2.7 LQ (liquid replaced), MacPro 3.2 GHz