Re: HP8920B power supply removal
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Hi ,
the big problem of these power supply are the electrolytic capacitors of the primary and secondary
Em domingo, 4 de novembro de 2018 18:22:44 BRST, george edmonds via Groups.Io <G6HIG@...> escreveu:
Hi Brian
I have worked on the 8920 series
The plastic mains switch actuator "rod" is the key, if you try to remove the power supply without removing it first you will damage it or the power supply switch (unobtainable).
The power supplies are SMPSU's, there are NO circuit diagrams available.
If it is like the 8920A they are dual input AC an DC and a nightmare to repair.
I have done two of them with difficulty,?
73 George G6HIG
On Sunday, November 4, 2018 8:15 PM, marcschrdrs <ambcs@...> wrote:
Hi Brian, never worked on a 8920, but I found a manual which states on p89:
Use the following sequence to remove the Power Supply:
1.Remove the Input assembly (see figure 8, "A23 RF Input Assembly," on page 77).
2.Pull the POWER switch shaft forward from the power supply, then pull it out back toward the rear of the Test Set.
3.Remove the screws and molex connector.
4.Slide the power supply out from the bottom of the Test Set.
Good luck,
Marc.
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