Electronics > Repair

Advantest R3273 / R3267 Repair

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chick0n:
I played a little bit more today.

I first thought, the High Band Mixer (TOP2301) is completely toast. This little block is responsible for the 3.5 to 26.5GHz range.

It is a combined YIG Filter and Harmonics Mixer. It can also pass through the low band (100HZ to 3.5GHz). It mixes the High Band right down to 421MHz.

I got very low readings from 4 to 8GHz, and nothing beyond that, at first. After twiddling around in the maintenance menu, I now get strong peaks from 3.5 to 26.5GHz. Not correct readings, but I can "see" up to 26GHz now. :)

It seems, the mixer was a little bit out of calibration, or some previous owner swapped it.

Non the less, a good calibration manual for the R3273 would be nice to have...


chick0n:
I examined the "Filter" board some more.

Its really are "just" 6 Voltage Regulators.

It takes +12.6V and -12.6V at the Input, splits it to 3x +12.6V and 3x -12.6V, to each Regulator.

At the Output, I get 6 times +-11.7 Volts.  :P

One 12V Voltage is missing, because the Transistor is broken. And one AD822 gets really hot. I will try to repair it. Or maybe build a new one?

Maybe Advantest calls it Filter-Board, because the Voltage stays about the same, but the output is more clean and stable.


Also, I fine-tuned the YTF. I get constant readings now, on the full range to 26.5GHz.  8)

The Amplitude still reads too high, but hey...  :-//

dxl:

--- Quote from: chick0n on September 16, 2022, 07:51:51 am ---Also, I fine-tuned the YTF. I get constant readings now, on the full range to 26.5GHz.  8)

--- End quote ---

I would have tried to repair the board first before doing any adjustments - are you sure that the YTF adjustment is wrong? Maybe the values it depend on the addtional voltage drop from the regulator? Do you still have the original values?

chick0n:

--- Quote from: dxl on September 17, 2022, 08:45:42 am ---
--- Quote from: chick0n on September 16, 2022, 07:51:51 am ---Also, I fine-tuned the YTF. I get constant readings now, on the full range to 26.5GHz.  8)

--- End quote ---

I would have tried to repair the board first before doing any adjustments - are you sure that the YTF adjustment is wrong? Maybe the values it depend on the addtional voltage drop from the regulator? Do you still have the original values?

--- End quote ---

Yes...I made photos of almost all calibration values.

With the password for the Debug Mode, one could save calibration values as .csv files. And save as backup, or edit in excel. That would be really cool...

chick0n:
Yesterday the CPU-Board died again.  :palm: I guess it has been Resoldered too often.

So I need to wait till someone sells me an R3267 / 73 CPU-Board. Or wait till a parts Machine pops up.

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