[HP48GX] Testing repaired keyboard
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07-26-2016, 02:42 PM
Post: #10
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RE: [HP48GX] Testing repaired keyboard
One way to determine if the four pads are independent of one another would be to use a continuity tester on pairs of pads. As a practical matter, I would expect the PCB to have a single ground plane that uses one or more twist ties as a return path to the batteries.
~ Mark Remember kids, "In a democracy, you get the government you deserve." |
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Messages In This Thread |
[HP48GX] Testing repaired keyboard - fnas - 07-21-2016, 09:29 AM
RE: [HP48GX] Testing repaired keyboard - mfleming - 07-21-2016, 11:29 PM
RE: [HP48GX] Testing repaired keyboard - TomC - 07-24-2016, 11:59 AM
RE: [HP48GX] Testing repaired keyboard - TomC - 07-24-2016, 01:52 PM
RE: [HP48GX] Testing repaired keyboard - fnas - 07-24-2016, 05:00 PM
RE: [HP48GX] Testing repaired keyboard - mfleming - 07-25-2016, 01:58 AM
RE: [HP48GX] Testing repaired keyboard - fnas - 07-25-2016, 12:32 PM
RE: [HP48GX] Testing repaired keyboard - mfleming - 07-25-2016, 02:32 PM
RE: [HP48GX] Testing repaired keyboard - fnas - 07-25-2016, 05:17 PM
RE: [HP48GX] Testing repaired keyboard - mfleming - 07-26-2016 02:42 PM
RE: [HP48GX] Testing repaired keyboard - fnas - 08-01-2016, 12:00 PM
RE: [HP48GX] Testing repaired keyboard - mfleming - 08-01-2016, 03:49 PM
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