Missing segments on all digits (HP-55)
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07-25-2018, 09:52 PM
Post: #1
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Missing segments on all digits (HP-55)
Missing b, c and d for all digits.
Simple fix? Ideas? |
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07-26-2018, 09:23 PM
Post: #2
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RE: Missing segments on all digits (HP-55) | |||
07-29-2018, 09:52 PM
Post: #3
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RE: Missing segments on all digits (HP-55)
Or possibly a bad solderjoint on an inductor array or driver chip.
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07-30-2018, 05:25 PM
Post: #4
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RE: Missing segments on all digits (HP-55)
I thought that since the error was so "definite" somebody
(who understands the drive logic more than I do) could determine the exact cause. Missing the same segments on all digits to me indicates a single problem. But I might be wrong about that. And the problem may be beyond repair. I've read articles about this from Alex Knight, Joe Rigdon and Tony Duall but my tools are basic; I'm an engineer but not an electrical engineer. I do miss my calculator, though. I've been using it for more that 30 years. |
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