Electronics > Repair
Agilent 53132A Counter Repair (FIXED and Upgraded)
jadew:
That looks great. I had the same experience with the little rubber foot, got on everything.
HighVoltage:
Ok, the second broken counter is fixed.
Faillure:
- All LED light up but nothing showed up on the VFD.
Problem:
- No high voltage power to the VFD.
- 5V supply was OK
- 38V supply was bad
Broken parts:
- VR1 and VR2 both bad
- (DIODE-ZNR 6.2V 5pct PD=1.5W IR=5UA)
Solution:
- Installed 2 new zener diodes
- Installed new VFD
Repair done!
glarsson:
That PCB is missing one XLINX so it's a 53131A, no a 53132A.
Never seen that extra PCB, with the three blue coax cables, in any 5313xA. What option is that?
texaspyro:
Where are you getting the VFDs?
HighVoltage:
--- Quote from: glarsson on December 27, 2017, 04:16:38 pm ---
Never seen that extra PCB, with the three blue coax cables, in any 5313xA. What option is that?
--- End quote ---
There are a few interesting things in this 53131A
I am not sure if this board with the blue cables is an option or was standard in the early counters.
The small blue cable is to take the 10MHz output from the Option 010 (High Stability) board to the main board output.
The little circuit board withe the 3 blue cables has a relay and can switch the 10 MHz output to two different locations on the main board:
Location 1: EXTERNAL 10 MHz OUT
Location 2: Ref. IN
May be it is for self calibration purpose? I am not sure and did not read up on it.
Interestingly this counter has the high stability crystal option 010 but there are no power supply cables going from the power supply to the Option 010 board, like usual (J2 on PCB not populated).
Instead it is powered by the ribbon cable.
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