Hi all,
Thanks for your help. I've just found a sch witch seems quite similar to
what I have on the boards in this thread:
So I can investigate a bit. The fuse didn't blown and no smoke!
Will tell you more if I found something!
Roland, F8CHK
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Envoy¨¦ : mardi 11 juillet 2017 15:43
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Objet : SV: [hp_agilent_equipment] 8594E power supply
Hi Roland
I have repaired several of these PSU and there is no SCH for it but if you
have the SCH for the 8560E series PSU you will find a lot similar.
The main error I have found is the switching FET¡¯s and the corresponding
small resistors, if my fussy memory is correct there are a 220 ohm and a 10
ohm leaded resistor to each FET check these.
The low voltage board has come in 3 different versions where the latest is
SMT but the design is the same but I have not yet repaired any of these yet
so concentrate on the HV switching and the capacitors here as well.
I hope this can help you a bit on the way, I have a handwritten SCH for a
8593A which also gives an idea of the built for the E series if you would
like this let me know.
Michael, OZ2ELA
Fra: hp_agilent_equipment@...
[mailto:hp_agilent_equipment@...]
Sendt: 11. juli 2017 12:36
Til: hp_agilent_equipment@...
Emne: [hp_agilent_equipment] 8594E power supply
Hi all,
I am trying to repair a 8594E spectrum analyser for a friend. The power
supply is faulty, none of the output voltages are ok, all leds on the ps are
off.
This is the 5062-8229 model, made in USA in the 90's. Three boards:
switching regulator 60024, output regulator 60025 and command 60026.
I have read that no schematics are available, is that still true? No visible
default, testing diodes, transistors, resistors, chemicals caps, didn't find
the problem.
I'm wandering if anyone have a faulty ps on a shelf, that may be I could use
to repair mine, two bads = one good, hi!
Open to any idea! Thanks for reading,
Roland F8CHK
