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I recapped my 2465A power supply and now it produces an audible clicking noise and the device no longer turns on.
Accordingly, I have constructed the dummy load presented in the service manual but am struggling to figure out how to use it to test the power supply boards outside.
I'm trying to use the "Inverter Troubleshooting Procedure" found in the service manual.

I'm still a novice at repair on these devices so please advise on how I can best remedy this issue.

Hi,

If you followed the silkscreen on the PC (it has an error), you probably swapped 2 capacitors locations.
One of them needing a 100+ Volt one, where now a 35V one is installed.
If you changed the caps 1 at the time, you do not have this common mistake. (Don't ask how I know)

If no mix up, check if you properly aligned the interconnection pins in between the 2 boards.

Just my 2 cents, good luck,

Leo

Hello, have no had 2465A in decades but these comments apply to 2465B and perhaps also to 2465, 2465A.

Get service man for your model and serial range.

see long threads on EEVBLOG: Tektronix 2465B teardown (72 pages) and both Qservice Greece and Conrad Audio in Isreal on 246x PSU, recapping, etc.

Normally if it aint broke dont fix!


Most affected caps are RIFA VDE X,Y in PSU EMI filter (bow eventually on 230V mains) and PSU bulk lytics (low C, leaky) and -15V PUS output cap.

A5 control board if it has SMD caps that leak corrosive and ruin the traces and components.

Jon

Do you have any specific recommendations for where to begin debugging this problem?
I've read through that forum post and don't know where to start.
I've already checked components for shorts and haven't found any so far.

My main question involves how I can follow the "Inverter Troubleshooting Procedure" from the service manual.
I believe this is the problem.
From what I understand, I'm supposed to test the PSU outside of the oscilloscope with the dummy load.
Is this correct?
And if so, this means I'm supposed to attach the PSU to mains voltage too?

On Mon, Apr 1, 2024 at 08:05 PM, JD wrote:

Do you have any specific recommendations for where to begin debugging this
problem?

Did you follow up on Satbeginner's post (#203616)?

Raymond

JD, I have the same problem. I was able to observe that on my A3 board, instead of the CR1070 diode, there is a zero ohm resistor, is this normal?

Excuse me, what I considered the replacement for the CR1070 is actually the W1060. In any case, the CR1070 diode is not present.

Did you follow up on Satbeginner's post (#203616)?

Raymond

Yes, I followed up on that post to no avail.