Electronics > Repair

Advantest R3273 / R3267 Repair

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chick0n:
This first problem is solved, or where non existant.

Scroll down for more problems. :)

chick0n:
Some Pictures: https://ibb.co/album/xqNvf6


Some stuff I found out: (With help of other people on the Forum)

- After you Disconnect / Change the NVRAM Lithium battery, the trace wents to the top of the LCD in full span mode.

Solution: You have to turn off the analyzer and hold the "." dot key, while turning on, during the whole bootup process. This initializes the NVRAM, and everything is back to normal.


- When you want to use a new CF card, you need a 8 or 16MB card, and format it with this tool:
https://www.sdcard.org/downloads/formatter/
Then copy the files on it. Nothing else worked for me.


- After pressing: "Shift + Format + 882323 + Hz", you can reset "ATT switch count" and "Power ON switch count".


- After pressing: "SHIFT + WINDOW + 882323 + Hz", you enter the calibration menu, where you can read/write/tweak every calibration value. So you dont need some unobtainium PC Software like with R&S Machines. (Thank you Advantest :)
When you want to save the changes to the EEPROM, you need to remove the small backplate assembly, with the 4 screws. There is a DIP Switch, where you can turn EEPROMWRITE on.


- Pressing SHIFT + TRANSIENT will also ask for a password, but it is not known yet. I think this is the access to the debug mode. I found some interesting strings in the firmware:

DFM.txt: --- Read memory ----------------
DFM.txt:                                     
DFM.txt:              DEBUG MODE             
DFM.txt:             TBC SEND 595           
DFM.txt:             TBC SEND DAC           
DFM.txt:           TBC SEND DAC 500         
DFM.txt:             TBC SEND CXD           
DFM.txt:          TBC SEND 87086/16         
DFM.txt:          TBC SEND 87086/20         
DFM.txt:           TBC SEND AD7008           
DFM.txt:            TBC READ 0831           
DFM.txt:           TBC EEPROM WRITE         
DFM.txt:           TBC EEPROM READ           
DFM.txt:            TBC SRAM WRITE           
DFM.txt:            TBC SRAM READ           
DFM.txt: DEBUG MODE
DFM.txt: Standard
DFM.txt: TBC|Send xxx
DFM.txt: TBC|Read 0831
DFM.txt: TBC|EEPROM xxx
DFM.txt: TBC|D.P.M xxx
DFM.txt: return
DFM.txt: STANDARD
DFM.txt: ACTIVE
DFM.txt: address| write
DFM.txt: FORMAT
DFM.txt: Hex|Dec
DFM.txt: SIZE TYPE
DFM.txt: 8|16|32
DFM.txt: Read Loop
DFM.txt: Write Loop
DFM.txt: return
DFM.txt: SEND 1/2
DFM.txt: TBC|Send 595
DFM.txt: TBC|Send DAC
DFM.txt: TBC|Send DAC5
DFM.txt: TBC|Send CXD
DFM.txt: TBC|Send 7008
DFM.txt: next menu
DFM.txt: return
DFM.txt: SEND 2/2
DFM.txt: TBC|Send 87086|/16
DFM.txt: TBC|Send 87086|/20
DFM.txt: prev menu
DFM.txt: TBC EEPROM
DFM.txt: TBC|EP Write
DFM.txt: TBC|EP Read
DFM.txt: return
DFM.txt: LOCAL BUS
DFM.txt: TBC|SRAM Write
DFM.txt: TBC|SRAM Read
DFM.txt: return
DFM.txt: DEBUG TBC
DFM.txt: ACTIVE
DFM.txt: address| write
DFM.txt: Write Loop
DFM.txt: return
DFM.txt: DEBUG TBC
DFM.txt: ACTIVE
DFM.txt: address| write
DFM.txt: Read Loop
DFM.txt: return
DFM.txt: DEBUG TBC
DFM.txt: ACTIVE
DFM.txt:  ID |sorc|dest|size
DFM.txt: Execute
DFM.txt: return

I searched all firmware files for the passwords, but could not even find "882323", which is the same as for the R3131A.
I wonder how they are encoded?

- There even exist a tool on the cf card (TBC.X), to read/write the calibration values as .csv files. But I dont know how to execute it. (Maybe through  Debug Mode)


I attached my CF-Card content, and I even Read out the TSOP Flash-EPROM on the CPU Board. Maybe anyone can find the Debug mode password.


The Operating System is called VRTX-32 from Mentor Graphics. I think the kernel runs on the Flash-Eprom, and the executables are on the CF-Card.

Also VRTX runs the Hubble Space Telescope. :)

CF Card Content: https://drive.google.com/file/d/1XZMoc3Zd86UlXWMjUhN6VH5KTtQ_qpTr/view

Also: Broken TG Fix: Oh Boy....  |O



chick0n:
Other Problems:

The -10dbm 30MHz Calibration Signal is OK. But when I connect it to the input, the analyzer reads it as 0dbm. This is only in the first minutes of operation, when the analyzer is still cold.

When the analyzer is warming up for a few minutes, suddenly the noisefloor drops a little bit, and the 30MHz signals then gets read as about -37dbm.

Both readings are either too high or too low, to be recognized in the calibration routine or selftest.

Sometimes the calibration routine catches the signal, and tries to calibrate for a few seconds. But then it freezes. and I have to press preset to reset the analyzer.

When the selftest catches the signal, everything fails, except the CPU and Synthe Block test.

When I look in the maintenance menu, at the system status, it complains about the RF and IF Output level. (See Photo)

Ignore the "Reference PLL" failure, I got that fixed already...

Also the Option 01 DSP Board doesnt get detected. But maybe it is really broken, and this isnt a bus communication error. I will try to deactivate this option, since its "only" a Signal Analyzer for old Mobile Standarts like cdma2000 and stuff....

chick0n:
I investigated a little bit further today, and tested the IF / Mixer stages.

I set the analyzer to zero span, and injected a 21.4MHz signal (3rd IF) into the IF Card. The dbm level reads about right.

Then I injected 421MHz (2nd IF Signal) into the 3rd Mixer. The level reads ok too.

Then I injected 4231.4MHz (1st IF Signal) into the second mixer. And there the strange behaviour begins to show. The signal level degrades over the course of a few seconds.

So the problems seems to lay in the 2nd Mixer. I treated the area with cooler spray and heat, but nothing changed.

Maybe the problem lays in the steering of the mixer on the underside of the RF block.

The PLL seems to work...

Maybe its a digital problem...

chick0n:
Also the last owner soldered around Q100. This is the amplifier stage for the 1st IF Signal.

The gaasfet looks like a NE32584C, so I ordered a new one.

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