HP97 printer never turns off
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04-30-2018, 10:13 AM
Post: #4
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RE: HP97 printer never turns off
(04-30-2018 08:01 AM)isanchez Wrote: Dear friends, Unfortunately, this could be any number of things. The paper adv is just a flag input to the ACT, which controls the PIK chip which in turn controls the print mechanism including the motor. If the display is blank as well, the ACT chip or ROMs could be faulty. The 97 repair manual suggests replacing the main logic board as the first test, then the keyboard logic assembly, then down to component level tests, power up reset circuit etc. With the help of the manual, there are test points and waveforms that can be looked at with a CRO and multi-meter. There is obviously power and the motor drivers work, so I would guess it is further back into the main circuit. cheers Tony |
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Messages In This Thread |
HP97 printer never turns off - isanchez - 04-30-2018, 08:01 AM
RE: HP97 printer never turns off - Hans Brueggemann - 04-30-2018, 08:34 AM
RE: HP97 printer never turns off - isanchez - 04-30-2018, 09:01 AM
RE: HP97 printer never turns off - teenix - 04-30-2018 10:13 AM
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