HP-41C with 23A batteries - remedy possible?
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11-21-2017, 07:12 PM
Post: #5
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RE: HP-41C with 23A batteries - remedy possible?
The power circuitry is composed of diodes CR1, CR5, CR6, zener CR4, inductance/coil L1, some electrolytic capacitors (470uF, 47uF) and a bipolar 14-pin IC (U2), all these component should be around U2. You should be able to check all the diodes fairly easy with a DMM and the electrolytic capacitors if you have a meter with such feature. Also the coil can be checked with the ohmmeter functionality of the DMM. if all the passive components are okay then I would say the problem might be U2.
Hope this helps. |
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Messages In This Thread |
HP-41C with 23A batteries - remedy possible? - Jonas Sandstedt - 11-15-2017, 01:12 PM
RE: HP-41C with 23A batteries - remedy possible? - mfleming - 11-15-2017, 03:28 PM
RE: HP-41C with 23A batteries - remedy possible? - Jonas Sandstedt - 11-15-2017, 05:27 PM
RE: HP-41C with 23A batteries - remedy possible? - Jonas Sandstedt - 11-20-2017, 02:58 PM
RE: HP-41C with 23A batteries - remedy possible? - acapde - 11-21-2017 07:12 PM
RE: HP-41C with 23A batteries - remedy possible? - Jonas Sandstedt - 11-21-2017, 08:41 PM
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