HP / Agilent 6632B System Power Supply Repair and testing

In this video the Ebay auction score item, 6632B system power supply, is taken apart to try to fix suspected issues.

Testing and verification is done and hopefully I will be able to perform a calibration in the future. I will need to gain access to accurate references / DMMs to perform calibration of these precision devices before that can happen.

[jejesson]

Thanks, very useful video! How did you get the side ears from from bezel back far enough to release the cover?

[fpvart]

How did you on display set the current to 0?
I have after calibration on display current readings -0.0022A

[johnbiden]

Nice to see this power supply in action somewhere else. I appreciate Agilent 6632B. What i dont like is the noisy fan. Its sounds like drilling my teeth. Is there a chance to make it smoother or bit silent. Another noise is the resonance in the metall cover comming from the transformer net frequency (50 Hz here). But this i can try to put a thicker rubber patch between transformer and cover. But the fan is an agressive sound. I am also thinking to change the color of the bluish plexi glas front display to a red one, which is my favorite color for power supply displays.

[kimitachi]

with a source of this type can I have a voltage of .86v and limit the current to 0.0001A? or the current is adjusted depending on the voltage? I would appreciate your response.

[hungtongle]

Hey! I have 1 pcs . This is drop voltage plz help me!

[johnlucier]

This is where thing usually get worse when you have a reostat as loose as it is. Keep messing with it and it's the end. Get it replace and shut it off..

[glaysonnn]

Muito bom o vídeo, forçou meu fraco inglês a entrar em ação.

[grhinson]

I have 6632A and the unit starts-up just fine-no errors and displays just fine but the only button working is the "ERR". Visually everything looks correct inside and out. I bought it, as-is, in a lot, but could not get it working. I had a GPIB interface, but I think someone ran off with it. Just curious, if anyone else was familiar with this issue. I know the front keypad can be locked per the manual, but I assume it is reset during start-up.

[hardkore]

Bad design on the encoder, they should've indented the knob further into the face plate so it doesn't stick out as far, which is far more prone to being damaged

[wolfgangbeginners-mind]

I'm 9 months late, but wouldn't it be wise to first remove the cables from the transformer to the pcb's and test them to make sure the re-setting of jumpers dosn't do some thing UN-expected? I've been totally sure, while fallowing printed instructions on other equipment only to find out that I just pork-ed "over Amped" something.
Remember Richard Nixon "Trust but Verify" or was it Ron Ray-Gun? I forget.