Electronics > Repair

Advantest R3273 / R3267 Repair

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chick0n:

--- Quote from: Gyorgy Albert on October 23, 2022, 12:51:35 pm ---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

--- End quote ---

Thanks for the Schematic!

Do you Measure the same Voltages as me on the Voltage Filter? About 12.7V Input and 11.7V Output?

chick0n:
After Disassembling the MAINTE.X, I found 3 ocurrences of "882323":

ROM:0000D016                      cmpi.l  #882323,0(a0)
ROM:0000D0C0                      cmpi.l  #882323,0(a0)
ROM:0000D184                      cmpi.l  #882323,0(a0)

One for each hidden menu? Except, for "SHIFT + Transient", nothing happens.

So maybe the Password is Correct, and something is missing for triggering the debug menu, or the menu gets triggered somewhere else?

Gyorgy Albert:
Maybe a dipswitch setting is required ( under the backplate). The eeprom write must be also enabled by a dipswitch, so this could be similar. You have a Write protection in the software menus, but it will work only if the dipswitch is set. It worth a try using the unknown dipswitch items. Some are already identified, if I remember, one or two are used to route different signals to the backpanel BNC socket. So the remaining could be what we are looking for.

chick0n:

--- Quote from: Gyorgy Albert on October 27, 2022, 06:44:33 pm ---Maybe a dipswitch setting is required ( under the backplate). The eeprom write must be also enabled by a dipswitch, so this could be similar. You have a Write protection in the software menus, but it will work only if the dipswitch is set. It worth a try using the unknown dipswitch items. Some are already identified, if I remember, one or two are used to route different signals to the backpanel BNC socket. So the remaining could be what we are looking for.

--- End quote ---

Already tried the dip switches on cpu board and backpanel.  :-//

Gyorgy Albert:
Maybe a floppy disk must be inserted and detected by the system. Just a thought.   ???

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