Electronics > Repair
Advantest R3273 / R3267 Repair
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jjoonathan:
Hi! Glad to see I'm not the only one to experience the BROKEN tracking generator  ;D

As for the underside of the RF deck, I do have pictures, because that's where the frequency response calibration EEPROM is. I also have a python class that knows how to read and write frequency response calibration values. Here:

https://www.dropbox.com/sh/duiwlludrlxyala/AACnrKwy0W6_VMswptNcmWIVa?dl=0

The RF deck EEPROM is in a really obnoxious location, so it would be nice if you figured out how to do it through GPIB instead. The most promising lead I know on that front is the $R/$W GPIB commands from the older R3371. The Advantest mailing list figured them out after I did things the hard way, of course -- but maybe they can help you!


--- Code: ---# $R is READ
# $W is WRITE    [url]https://groups.io/g/advantestinstrument/message/1545[/url]

allData = b''
print('Start reading %s words' % n)
for a in range(0, n):
    address = str(format(start_adr+(a * 2), '02x'))
    data = Device.query('$R%s' % address).strip("\n")
    print(address, '\t', data)
    allData = allData + binascii.unhexlify(data.strip())

Program to concatenate:
[url]https://groups.io/g/advantestinstrument/message/1526[/url]

--- End code ---

EDIT: fix link
chick0n:

--- Quote from: jjoonathan on October 15, 2022, 01:59:31 am ---Hi! Glad to see I'm not the only one to experience the BROKEN tracking generator  ;D

As for the underside of the RF deck, I do have pictures, because that's where the frequency response calibration EEPROM is. I also have a python class that knows how to read and write frequency response calibration values. Here:

https://www.dropbox.com/sh/duiwlludrlxyala/AACnrKwy0W6_VMswptNcmWIVa?dl=0

The RF deck EEPROM is in a really obnoxious location, so it would be nice if you figured out how to do it through GPIB instead. The most promising lead I know on that front is the $R/$W GPIB commands from the older R3371. The Advantest mailing list figured them out after I did things the hard way, of course -- but maybe they can help you!


--- Code: ---# $R is READ
# $W is WRITE    [url]https://groups.io/g/advantestinstrument/message/1545[/url]

allData = b''
print('Start reading %s words' % n)
for a in range(0, n):
    address = str(format(start_adr+(a * 2), '02x'))
    data = Device.query('$R%s' % address).strip("\n")
    print(address, '\t', data)
    allData = allData + binascii.unhexlify(data.strip())

Program to concatenate:
[url]https://groups.io/g/advantestinstrument/message/1526[/url]

--- End code ---

EDIT: fix link

--- End quote ---

For the R3273, its little bit different.

There are two Hidden Menus. In one menu, you can tweak the calibration values directly from the front panel. For this menu, the Password is known.

The other one is the Debug Menu, with this you can read and write the whole memory map. And you can save the Calibration Values as .csv files on the CF-Card. (every module in R3273, has its own eeprom with cal values). Unfortunately, the Password for the Debug Menu is not known yet, so no one was able to test this yet.

"csv" sounds like, the analyzer converts the eeprom content directly into human readable form.

The passwords for the menus are not stored in ASCII form, but encoded with alghoritm? Decoding this exceeds my skills....
jjoonathan:
I never figured out the second password, but I did calibrate the frequency response on two R3273s with r3273.py. It works.
chick0n:

--- Quote from: jjoonathan on October 15, 2022, 09:58:49 pm ---I never figured out the second password, but I did calibrate the frequency response on two R3273s with r3273.py. It works.

--- End quote ---

Sorry... i didnt see the dropbox link first.

That looks very helpful. My r3273 could use a Step Attenuator calibration too. But I have to figure out how to get this running...

Also, the Attenuator crimping looks identical to mine. Thanks.

Gyorgy Albert:
Hi folks,

I sketched some time ago the schematic of the BLC024864, I attached it as a pdf file. It is not looking very nice, but at that time it was good enough for me to repair mine. It si a simple voltage filter, which makes silent power supply lines for the RF part. In my unit, one 39 kOhm divider resistor was simply interrupted. It is not exposed to high voltages or currents, it simply gives up. After replacement all my RF voltages were fine. But as it was stated above, I also skipped the filter board as a first step, and looped the voltages back to the RF module. Just after that I started to find the problem on the module itself.

My R3267 units have flash ROMs, and no CF cards inside. The main CPU boards are different from the R3273, which indeed has the firmware on a CF card (pictures of the two sides of one of my R3267 attached).
@Chick0n: if you need some measurements on the main CPU boards connectors/interfaces, please let me know. I will try to do them in one of the following weekends.

BR,
Gyorgy
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