68kMLA Classic Interface
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| Click here to select a new forum. | | Classic II over and under volt. Help | Posted by: jimjimx on 2019-07-18 16:44:25
After a recap, I got the chime back, but still have screen issues.
Checked the electromotive force, and I’m reading 13.51 and 4.47... and drifting lower & higher
Both are too far out of spec., and I’m asking for help on finding out where I should start with this one.
Edit
When reading the -12 line, it holds -12 for about 30 seconds, than drops to zero, climbs to -1 or -2, than jumps to -12 again.
Any ideas?
This thing is everywhere
| Posted by: jimjimx on 2019-07-19 08:30:04
Well...
Could anybody help me out with schematics of the analog board?
Do ya have ‘em?
Know where I can get ‘em?
| Posted by: dochilli on 2019-07-21 01:08:53
I would replace DP3, DP4, CP4, CP5, TDA4605, IRFB40 and CNY17G-3. These are often defect.
| Posted by: jimjimx on 2019-07-21 07:31:20
I think I’m going to start with the caps and see where the rails are at from there, and probe around to see what’s doing what..
Too bad I don’t have the parts here & now. I think I’ll double the order.
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