Advantest u3772 password for maintenance mode - Page 1
Forum section: electronics / testgear

author: avlijas.sladjan
author_rank: Contributor
timestamp: August 06, 2020, 11:06:15 am
content: Hi,I have a problem with the Advantest U3772 Spectrum analyzer and I need a password to go into the calibration menu. Can anyone know the password for maintenance mode of this instrument. I also tried to find it in a cf card (this is linux based software), but i did not have luck. I also try to contact Advantest, but they dont want to help me (It is very disappointing).Also I have an old instrument R3271A and Advantest don't want to share with me the service manual. I think that this will be my last Advantest instrument, and in future I will buy only old HP/Agilent for my home lab.

author: eb4fbz
author_rank: Regular Contributor
timestamp: August 06, 2020, 04:01:32 pm
content: Have you tried 27466?

author: avlijas.sladjan
author_rank: Contributor
timestamp: August 06, 2020, 09:36:20 pm
content: Thank you, I will try this password tomorrow.

author: avlijas.sladjan
author_rank: Contributor
timestamp: August 07, 2020, 07:49:10 am
content: 27466 is not password for this instrument

author: avlijas.sladjan
author_rank: Contributor
timestamp: August 11, 2020, 08:23:33 am
content: Does anyone have any idea where to look for password?

author: Whales
author_rank: Super Contributor
timestamp: August 11, 2020, 08:41:56 am
content: Try the simple ones:00000000000012312341234511111etcMost often people don't want to set a password, but are forced to, so they do whatever.

author: avlijas.sladjan
author_rank: Contributor
timestamp: August 11, 2020, 09:02:45 am
content: I try it before. But this is not user password, it is factory set password for maintenance menu.

author: Whales
author_rank: Super Contributor
timestamp: August 11, 2020, 10:34:37 am
content: Ah, apologies.Searching the CF card further is probably your last bet. If it's hard-coded then it will be inside an executable, the "strings" commandline utility may help you + grepping for a series of 0-9 digits.

author: avlijas.sladjan
author_rank: Contributor
timestamp: August 11, 2020, 11:22:39 am
content: I did not have luck to find it. I find only the symbol "1checkMaintPassword(const QString &)", but don't have luck to find a password.I was trying to start an app in some similar linux environment (to try to debug), but got an error (cannot find /dev/fram). This is a QT linux desktop app.

author: Whales
author_rank: Super Contributor
timestamp: August 11, 2020, 12:00:47 pm
content: /dev/fram sounds like non-volatile hardware storage. ie a few kb of flash on the board.If the app is accessing it then it sounds like important stuff is stored there. At a guess: calibration data + passwordsBut that's only a guess.Is there any way you couldcat /dev/fram > fileon the equipment? If the program only uses normal reading & writing syscalls to /dev/fram then you can probably just create /dev/fram as an ordinary file on your test linux setup. Regardless: you will want to look inside your device's fram with a hex editor to see if it stores anything useful.I should add a disclaimer at this point: I assume you actually own this machine and are not renting it or otherwise have it under some support contract. It looks like this model is EOL so it's probably a safe guess, and if the company won't give you a password for an EOL machine that you own so you can calibrate/repair/etc it then that's just evil.

author: avlijas.sladjan
author_rank: Contributor
timestamp: August 11, 2020, 12:17:03 pm
content: Yes, fram is maybe small eeprom on board.This is an analyzer of my friend. He doesn't live near me, and he only sends me cf card images. In case that Analyzer is here, I will log to linux and debug/crack. But without instruments I only have files to try to find a pass.

author: avlijas.sladjan
author_rank: Contributor
timestamp: August 11, 2020, 12:18:52 pm
content: Also calibration data is on cf card + user password (on another "/data" partition).

author: avlijas.sladjan
author_rank: Contributor
timestamp: August 11, 2020, 12:34:39 pm
content: Also don't worry, my friend is an RF engineer and he owns this machine.

author: eevcandies
author_rank: Regular Contributor
timestamp: August 13, 2020, 03:51:34 am
content: here are som eother numbers...maybe good luckhttps://www.scribd.com/document/253979485/Advantest-Reset-Instructions

author: avlijas.sladjan
author_rank: Contributor
timestamp: August 13, 2020, 05:22:13 am
content: Thank you. I tried all of this before and nothing helped.

author: abyrvalg
author_rank: Frequent Contributor
timestamp: August 13, 2020, 07:57:03 am
content: Try 85472 (found in you gui.zip in checkMaintPassword())

author: avlijas.sladjan
author_rank: Contributor
timestamp: August 13, 2020, 11:16:59 am
content: Thank you, thank you, this is the right password. Now my friend has access to all settings in the instrument. I owe you a beer

author: richard2010
author_rank: Newbie
timestamp: March 02, 2022, 03:00:18 pm
content: Hello guys. Can anyone help me how to enter maintenance mode in this instrument?You told us the password but didnt tell us how to access maintenance mode menu.Thanks in advance,Richard.

author: milesd969
author_rank: Newbie
timestamp: March 04, 2022, 06:48:28 am
content: Entering maintenance mode: shift + 5 the code entry window opens