Electronics > Repair

Agilent 53132A Counter Repair (FIXED and Upgraded)

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HighVoltage:

--- Quote from: pizzigri on August 01, 2021, 10:45:24 am ---
Plus, since the Delta PS is so unreliable, maybe it could be a good idea to make a linear ps for it. Replacement Delta PS go for 250-350 Euro which together with the VFD going prices, is totally crazy...

--- End quote ---

This was discussed before in a different thread also in a Keysight scope thread since the PSUs in some Keysight gear are not very reliable.
The positive aspect of this is that we can find broken test gear for low cost and repair it for fun.

f14:
sorry for bump old topic.
I have two error QSPI  fail and INTERP fail. it suddently happens. My 53131a is "newer" version ( diffirent A1 board with agilent service doc)
Have any idea with this fail ?. power supply is good. voltage output within specs

HighVoltage:
The service manual gives these indications:

QSPI: FAIL
A1 Motherboard Assembly, or A2 Display Board Assembly

INTERP: FAIL
A1 Motherboard Assembly, or A4 AC Power Supply Assembly

So, most likely something is wrong in the A2 motherboard assembly

What are the symptoms of the instrument?
Do these fails show up doing starting of the instrument?

f14:

--- Quote from: HighVoltage on April 02, 2022, 11:01:10 am ---The service manual gives these indications:

QSPI: FAIL
A1 Motherboard Assembly, or A2 Display Board Assembly

INTERP: FAIL
A1 Motherboard Assembly, or A4 AC Power Supply Assembly

So, most likely something is wrong in the A2 motherboard assembly

What are the symptoms of the instrument?
Do these fails show up doing starting of the instrument?

--- End quote ---
it suddently appear when power on self test.
I have read service doc from agilent but Im not clear about they explain this errors
now my 53131a like a brick it appear INTERP:FAIL when hit RUN or enter
I have test A1 mainboard. and I got something strange for me . C60 C61 cap. votage not stable (changing ~2v <->5v) I remove both caps and check the voltage it stable at 5v but the caps is fine (I check with LCR)
thanks for your anwers

HighVoltage:
Check all DC voltages and rails for AC ripple and stability.

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