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HP-35 Power Supply Waveforms
04-08-2019, 05:52 AM
Post: #24
RE: HP-35 Power Supply Waveforms
Hi
this is the guide we are using :
http://home.comcen.com.au/therobinsons/h...repair.pdf
if you look at page 7, after disconnecting the measurement points the values should be :
Vcc should be just around 8.2V.
Vgg should be about –12.4V
Vss should be about 6.28V
which are the same we encounter on a working HP65
our are a little higher, which to me is difficult to explain considering the similarity of all of the components used
The idea was to have a working PSU and use it for both testing unknown components from broken units, or to power units (classic only) under troubleshooting whose PSU condition is uncertain ...
but with these values we are afraid to use ...
Thanks for all the support and take care !

Edoardo & Alberto
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Messages In This Thread
HP-35 Power Supply Waveforms - cruff - 04-29-2018, 09:10 PM
RE: HP-35 Power Supply Waveforms - teenix - 03-28-2019, 11:06 PM
RE: HP-35 Power Supply Waveforms - cruff - 03-29-2019, 12:16 AM
RE: HP-35 Power Supply Waveforms - cruff - 04-02-2019, 12:20 AM
RE: HP-35 Power Supply Waveforms - cruff - 04-03-2019, 12:12 AM
RE: HP-35 Power Supply Waveforms - cruff - 04-03-2019, 12:59 AM
RE: HP-35 Power Supply Waveforms - cruff - 04-04-2019, 12:48 AM
RE: HP-35 Power Supply Waveforms - cruff - 04-05-2019, 11:50 PM
RE: HP-35 Power Supply Waveforms - teenix - 04-06-2019, 09:52 AM
RE: HP-35 Power Supply Waveforms - cruff - 04-06-2019, 12:36 PM
RE: HP-35 Power Supply Waveforms - cruff - 04-06-2019, 06:24 PM
RE: HP-35 Power Supply Waveforms - Zaphod - 04-09-2019, 10:34 PM
RE: HP-35 Power Supply Waveforms - cruff - 04-07-2019, 08:33 PM
RE: HP-35 Power Supply Waveforms - teenix - 04-08-2019, 09:21 PM
RE: HP-35 Power Supply Waveforms - albertofenini - 04-08-2019 05:52 AM
RE: HP-35 Power Supply Waveforms - cruff - 04-08-2019, 01:08 PM
RE: HP-35 Power Supply Waveforms - AndiGer - 04-08-2019, 02:21 PM
RE: HP-35 Power Supply Waveforms - AndiGer - 04-08-2019, 03:28 PM
RE: HP-35 Power Supply Waveforms - cruff - 04-09-2019, 12:49 AM
RE: HP-35 Power Supply Waveforms - cruff - 04-09-2019, 11:41 PM
RE: HP-35 Power Supply Waveforms - AndiGer - 04-09-2019, 05:17 PM
RE: HP-35 Power Supply Waveforms - cruff - 04-10-2019, 02:41 AM



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