Repairing & restoring HP82002 - advice needed
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09-17-2019, 06:38 AM
Post: #4
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RE: Repairing & restoring HP82002 - advice needed
Hi,
indeed open curcuit voltage of calculator supply path is above 15V. So far I have never come across a faulty transformer inside Classics chargers. So no transformer advice from my side. Normally output capacitor is dead. Then output voltage(s) (when a load, e. g. calculator is attached) have a measureable AC portion and Classics calculator display flickers or do not work at all. You can replace it with any modern 470uF/25V oder 470uF/50V capacitor. When there are AC/DC output voltage(s) of zero normally fuse inside is dead. I vaguely remember that I used a matching (in size and rating) SMD fuse as replacement in such cases. Best regards, Werner |
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Messages In This Thread |
Repairing & restoring HP82002 - advice needed - albertofenini - 09-13-2019, 12:37 PM
RE: Repairing & restoring HP82002 - advice needed - teenix - 09-14-2019, 12:13 AM
RE: Repairing & restoring HP82002 - advice needed - albertofenini - 09-16-2019, 06:56 PM
RE: Repairing & restoring HP82002 - advice needed - Sadsilence - 09-17-2019 06:38 AM
RE: Repairing & restoring HP82002 - advice needed - Paul Berger (Canada) - 09-17-2019, 02:47 PM
RE: Repairing & restoring HP82002 - advice needed - vassilisprevelakis - 09-21-2019, 09:36 PM
RE: Repairing & restoring HP82002 - advice needed - Martin Hepperle - 09-23-2019, 02:44 PM
RE: Repairing & restoring HP82002 - advice needed - albertofenini - 09-17-2019, 09:38 PM
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