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Transistor Replacement
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04-22-2022, 09:42 PM
Post: #12
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RE: Transistor Replacement
I think this is the last post for me on this confusing subject. I pulled Q4 from a working 97, and it's NPN. I checked the tracing on both the older and newer boards, and they're the same. The 1976 service manual is correct. The 1982 manual has a number of errors.
1) The keyboard PCA is part # 0097-60019 (the manual has 60910) 2) Q4 is NPN (manual has PNP) 3) Q2 base is connected to R7, but NOT connected to Vbatt. My conclusion - Tony Nixon was correct on all counts (not surprised!). Best Regards to all, Dave |
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| Messages In This Thread |
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Transistor Replacement - teenix - 04-18-2022, 11:51 AM
RE: Transistor Replacement - AndiGer - 04-18-2022, 12:22 PM
RE: Transistor Replacement - teenix - 04-18-2022, 12:45 PM
RE: Transistor Replacement - teenix - 04-19-2022, 03:13 AM
RE: Transistor Replacement - Dreato - 04-20-2022, 03:32 PM
RE: Transistor Replacement - teenix - 04-20-2022, 09:26 PM
RE: Transistor Replacement - Dreato - 04-21-2022, 08:57 PM
RE: Transistor Replacement - Dreato - 04-21-2022, 09:28 PM
RE: Transistor Replacement - teenix - 04-21-2022, 10:21 PM
RE: Transistor Replacement - AndiGer - 04-22-2022, 02:39 PM
RE: Transistor Replacement - Dreato - 04-22-2022, 04:52 PM
RE: Transistor Replacement - Dreato - 04-22-2022 09:42 PM
RE: Transistor Replacement - AndiGer - 04-23-2022, 06:17 AM
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