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cathode for HP91
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07-31-2015, 05:09 AM
Post: #4
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RE: cathode for HP91
(07-31-2015 04:59 AM)isanchez Wrote: You mention that it controls the low battery led...in my case, after replacing the cathode, it in the 91, the low battery indicator is always on. I have read in the service manual, that it is associated to he pair cathode / R2 resistor ... In the logic schematic, R2 is not shown...I suppose it is the R* shown as variable... I should then change the R2 resistor to reduce the indicator sensitivity... In the 97 service manual (page 4-23) it's marked as R1* and the parts list shows that it can have values of between 2.87K and 9.09K ohms. -katie |
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| Messages In This Thread |
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cathode for HP91 - isanchez - 07-30-2015, 06:29 AM
RE: cathode for HP91 - Katie Wasserman - 07-30-2015, 04:11 PM
RE: cathode for HP91 - isanchez - 07-31-2015, 04:59 AM
RE: cathode for HP91 - Katie Wasserman - 07-31-2015 05:09 AM
RE: cathode for HP91 - PANAMATIK - 07-31-2015, 08:04 AM
RE: cathode for HP91 - Thomas Radtke - 07-31-2015, 08:34 AM
RE: cathode for HP91 - Katie Wasserman - 07-31-2015, 04:04 PM
RE: cathode for HP91 - Thomas Radtke - 07-31-2015, 05:34 PM
RE: cathode for HP91 - isanchez - 07-31-2015, 08:27 AM
RE: cathode for HP91 - Etienne Victoria - 08-02-2015, 08:35 AM
RE: cathode for HP91 - isanchez - 08-04-2015, 07:21 AM
RE: cathode for HP91 - d b - 08-04-2015, 02:25 PM
RE: cathode for HP91 - TASP - 08-05-2015, 05:22 AM
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