Electronics > Repair

Agilent 53132A Counter Repair (FIXED and Upgraded)

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TheSteve:
The counter does look to have newer firmware then I have seen posted anywhere - 4806. Not quite as easy to dump and post as it was with older units that had four socketed PLCC devices.

Vgkid:
Could you either substitute a different fan to run off of another rail(non standby rail).
 Or, use a relay to turn on the fan(off the 5v rail, or others) and keep it wired the same way.
The 2nd one is how that is implemented in the 5335.

HighVoltage:
Interesting comments everyone - thank you, I will look in to the fan issue, when I put it back together.
I probably have to get a new fan anyways.

Right now is cleanup time.
I took the instrument completely apart now and started with the display and front cover.
All cleaned up now, looks like new -  kind of.

Next is to clean the PCB in alcohol.


EPTech:
Hi there,

If the fan has died somewhere along the way, you should check the condition of the input cap but most certainly the low ESR output caps on the SMPS. I would just replace them by default, that may already fix the problem. I  am not affiliated to any brand but I would recommend the FC, FM or FK series from Panasonic. Also check the high ohm resistors.

Does the supply work without load attached?

HighVoltage:

--- Quote from: EPTech on January 15, 2016, 01:36:58 pm ---Hi there,

If the fan has died somewhere along the way, you should check the condition of the input cap but most certainly the low ESR output caps on the SMPS. I would just replace them by default, that may already fix the problem. I  am not affiliated to any brand but I would recommend the FC, FM or FK series from Panasonic. Also check the high ohm resistors.

Does the supply work without load attached?

--- End quote ---

Thanks EPTech
The PSU is sitting in alcohol right now since it was so full of dirt, some components were not visible.
I wanted to clean it, before I would test without load.

The corrosion on the frame is removed with a rotating steel brush but it was already deep in to the metal, even after cleaning it looked horrible.

So, I decided to cover this area of the frame with some paint.
And it seems to turned out alright.


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