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67 is flakey
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10-11-2023, 01:48 AM
Post: #2
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RE: 67 is flakey
Update: I pulled the ACT and the ROMs (not ROM0) and saw no sign of battery leakage. (whew!)
But, decided on a guess to check traces w/ohmeter, set on max R. Found high impedance between traces that go to nothing. huh? Cleaned w/IPA (and dried) and no more high Z found. An aside: I think I "cleaned" this board w/vinegar years ago. I pulled out my vinegar and checked a cap full...conductive! It might be good for battery mess, but clean w/IPA. Anyway, thought that might be it, but NO, it was the same issue. (all chips soldered back in) Replaced the cap (330pf) in the osc LC (a suggestion) but no change at all. Stumped! |
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| Messages In This Thread |
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67 is flakey - mbielman - 10-09-2023, 04:26 PM
RE: 67 is flakey - mbielman - 10-11-2023 01:48 AM
RE: 67 is flakey - teenix - 10-11-2023, 03:49 AM
RE: 67 is flakey - John Garza (3665) - 10-11-2023, 06:49 AM
RE: 67 is flakey - mbielman - 10-11-2023, 02:31 PM
RE: 67 is flakey - John Garza (3665) - 10-11-2023, 04:01 PM
RE: 67 is flakey - mbielman - 10-11-2023, 04:08 PM
RE: 67 is flakey - John Garza (3665) - 10-11-2023, 10:39 PM
RE: 67 is flakey - mbielman - 10-11-2023, 04:14 PM
RE: 67 is flakey - teenix - 10-11-2023, 07:40 PM
RE: 67 is flakey - mbielman - 10-11-2023, 08:04 PM
RE: 67 is flakey - teenix - 10-11-2023, 08:18 PM
RE: 67 is flakey - mbielman - 10-11-2023, 11:10 PM
RE: 67 is flakey - mbielman - 10-13-2023, 01:49 AM
RE: 67 is flakey - teenix - 10-13-2023, 02:22 AM
RE: 67 is flakey - mbielman - 10-13-2023, 03:21 AM
RE: 67 is flakey - mbielman - 10-14-2023, 08:31 PM
RE: 67 is flakey - teenix - 10-15-2023, 12:07 AM
RE: 67 is flakey - mbielman - 10-14-2023, 10:13 PM
RE: 67 is flakey - mbielman - 10-15-2023, 12:17 AM
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