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| Color Classic won't turn on - Analog board issue |
Posted by: appleg33k85 on 2022-03-11 18:21:07
Good Evening
Looking for some help with with an analog board issue I'm having. I recently acquired a Color Classic that doesn't power on. With the logic board removed, flipping on the power switch with it plugged in creates a constant clicking sound. Here is what I've tried thus far:
Full recap of the board, verified all caps are installed correctly.
Replaced the Optocoupler and TDA IC chips
Checked the large resistors
Checked for cracked solder joints
The CP16 capacitor has a crack in it, but I don't believe it is what is causing the issue. Not sure where to go from here so looking for someone to point me in the right direction. |
Posted by: Johnnya101 on 2022-03-11 18:45:31
Not well versed in color classics, is CP16 on the AB or LB? AB recapped as well? I'd say any caps with a crack are dead, but if it has anything to do with what you're seeing, no idea. |
Posted by: appleg33k85 on 2022-03-17 06:07:50
An Update to this: I've replaced a few more common failure components. I replaced the RIFA cap that was cracked in the above photo along with a film cap. I also replaced the 1N4148 diodes and an IRFBC40 MOSFET. Board is still having the same issue and I feel like I'm coming up short on ideas of what the issue could be. |
Posted by: ktkm on 2022-03-22 02:56:39
Could it be a grounding issue? I believe the CC MB shield needs good contact. |
Posted by: appleg33k85 on 2022-03-22 13:07:11
Could it be a grounding issue? I believe the CC MB shield needs good contact. Could be, not sure what points it needs to be in contact at to ground? I haven't tested the AB fully outside of the case because i'm not sure if thats safe to do without the flyback being connected. |
Posted by: bibilit on 2022-03-23 00:31:00
Could it be a grounding issue Don't think, mine is missing the grounding shield |
Posted by: joshc on 2022-03-23 01:29:28
What is the expected behaviour when testing a CC without the LB installed? Have you tried a test with a known good LB? |
Posted by: bibilit on 2022-03-23 02:49:30
What is the expected behaviour when testing a CC without the LB installed The fan should kick-in only IIRC |
Posted by: imactheknife on 2022-12-11 19:09:48
Any success with your ab? |
Posted by: ironborn65 on 2023-01-07 09:22:34
I'm interested in this thread because I'm suffering the same issue, as many with a CC |
Posted by: appleg33k85 on 2023-01-09 08:06:29
Unfortunately I never was able to resolve the issue, I was tired of throwing parts at it without success and ended up getting a new AB. |
Posted by: ironborn65 on 2023-01-09 08:17:26
I understand the feeling, you are not alone pal! |
Posted by: Cam on 2023-01-09 12:04:47
I'm not feeling so alone in AB hell; I have 2 of them that are D-E-D dead when the LB is inserted. |
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