HP 6634A repair (blown filter capacitor) part 2

I finally remembered to order the three capacitors I needed for this repair in my last order and so I went ahead and did the repair.

To reach the main board I didn’t exactly follow the service manual: after opening the HP 6634A I just pulled out the transformer and then the main board. Done that it was easy: clean the pcb, solder in the three capacitors and then done.

I also calibrated the HP 6634A… it appears that someone calibrated it without setting up the proper connections on the back. Now it works as it should.


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