Tek CSA7404/TDS7000 repair project (Upgraded memory/CPU)

[Claudius089]

Hello exit_failure,
I just looked at your gitbhub repository and it's very good work. My TDS7254 works with some problems in "trigger EDGE" synchronization mode. On the other hand, when I use the “ADVANCED trigger” mode, it works very well. What I would like to do is make a backup of the CMOS and NVRAM contents before putting in a backup battery because mine is from 2012 and migrating to a W2000 or XP environment with all the applications working fine.
I care a lot about my TDS7254 and I wouldn't want to break it, that's why I want to take all the necessary precautions before making NVRAM and software modifications. I ordered equipment to do the job (mat, anti-static bracelets, welding stripper etc…).
I would like to receive your image under XP of your TDS7104 to try it on my TDS7254.
Cordially.

Translation by G..e.

[exit_failure]

Hello exit_failure,
I just looked at your gitbhub repository and it's very good work. My TDS7254 works with some problems in "trigger EDGE" synchronization mode. On the other hand, when I use the “ADVANCED trigger” mode, it works very well. What I would like to do is make a backup of the CMOS and NVRAM contents before putting in a backup battery because mine is from 2012 and migrating to a W2000 or XP environment with all the applications working fine.
I care a lot about my TDS7254 and I wouldn't want to break it, that's why I want to take all the necessary precautions before making NVRAM and software modifications. I ordered equipment to do the job (mat, anti-static bracelets, welding stripper etc…).
I would like to receive your image under XP of your TDS7104 to try it on my TDS7254.
Cordially.

Translation by G..e.

Hi Claudius,I never backed anything up since mine came with a dead battery anyway. I don't know if there is any calibration data or anything else that needs to be backed up which will be lost permanently. You can display the necessary settings for board to board communication and the boot process by attaching a serial console in the way described at the repo and taking screenshots/copying the text.
Maybe somebody else knows if there is anything else worth backing up.
After reinstalling the operating system or applying an image you always have to run the self calibration from the TekScope application.

Also maybe consider getting a separate HDD/SSD for the new installation so you can put the old one back in the scope if anything goes wrong.
Please give me a week or so for the image. I have a lot of work that requires my attention at the moment. :-(
 

[Claudius089]

Hello,
I have already imaged the original 40 GB HDD and replaced it with a 128 GB Sata SSD. In addition I replaced the CMOS battery. It works very well and it starts much faster. I read that if you manipulate the NVRAM, you will have to configure everything. What I don't know how to do at the moment. Fortunately, there are specialists who share their information with beginners like me. With their experiences it seems easy to them, but for me who has never done any manipulations on this scope I have an apprehension is much more complicated. This afternoon I just received my USB-serial cable, I will connect it and see what happens when my TDS7254 starts up.
A big thank you for your image and I will wait all the time necessary and I take this opportunity to order another SSD.

[RPuccio]

Hi Claudius ! I haven't even try to upgrade to Win2000 as the Win98 image works fine here ! Also, it seems like we already chat a bit on French' "Leboncoin" 

Thanks a lot Exit_failure for your help ! I'm gonna check the Github repository.

[Claudius089]

Hi Claudius ! I haven't even try to upgrade to Win2000 as the Win98 image works fine here ! Also, it seems like we already chat a bit on French' "Leboncoin" 

Thanks a lot Exit_failure for your help ! I'm gonna check the Github repository.

Hello RPuccio,
Yes, absolutely, we discussed on LBC.fr. I'm still trying to fix my sync issue. I had a few discussions on other forums about this and I was strongly advised to reinstall everything. Indeed, as I wrote previously, I think that my scope was reinstalled just before my purchase and that the synchronization fault could come from there. That's why I would like to backup NVRAM, CMOS because I made an image of my HDD (installed by vendor) and it does not contain NVRAM and CMOS contents.
I am not reassured to disassemble my scope. This is why I want to take the maximum precaution. The beginnings start badly, I have just bought a USB-COM serial link and for the moment I have no character displayed on the Terminal console when starting the scope (I use CoolTerm on PC W10).
Since I don't have anything extra to do a full reinstall, I'll try with an image other than mine. I would prefer to have all the elements to do a complete installation.
I'm glad to know that your oscilloscope is working properly. Is it a full install or an image? If it's a full install with W98, would it be possible to get your full procedure with all the softwares.

[sucharitha]

Hi,

Recently i got a Tek TDS7404 DPO with No power-on response.
gone thru the entire service manual. checked the unit by removing all the boards one by one to locate the fault: with  powersupply board , PPC board and rear power distribution board in loop , but the result is null.

With Mains power-on, Standby led glows on PSB without Debug poweron jumper on PPC, if the pins shorted with jumper led goes off.
no further response.
How to find out which one is faulty : powersupply or PPC.
Gone thru the entire thread but dint come across this sort of problem.
Can we check power supply in standalone condition if so pls any help is appreciated

hopefully i might get successful in repairing this with ur help  Thanks a lot

[Uranium Fever]

Hi,

I recently bought a working TDS 7054 from an industry auction for next to nothing. It stopped working last week, being stuck at the TekScope splashscreen.
With the help of this thread, I was able to fix it by spotwelding a new battery to the NVRAM powercap and reconfiguring it. The PC Mainboard had a leaking capacitor which did not affect performance yet but which I of course replaced.

I just wanted to say thank you to TiN. Stay strong! I hope you are fine and that this despicable invasion is soon put to an end.

[RPuccio]

Hi Claudius, my file is a W98 image, not a full install.

[charlyd]

@everybody:  repairing his 7154/7254/7404 Scope ( non B Version) .  did you ever think about glue-ing heatsinks on the trigger chips otherwise they will die overtime  and your unit becomes useless.!
    (Chips are obsolete / not available anymore.)

@Claudius089: i hope it is not yet too late.  -> sympthon is edge triggering problems

when working on those units without heatsinks on the trigger chips use a forced airflow over the ACQ board.

[Claudius089]

Hi Claudius, my file is a W98 image, not a full install.

Hello @RPuccio,
Like me, I only have one hard drive iso. I thought you did a full install.
I recovered on the web a W9..SE os in iso cd and a bootable dos 6.2 diskette. What I would like to know is if I reinstall W9..SE, do we find all the applications (drivers, third-party applications, etc.) for it to work correctly. I went to Tek site and found the main application (CSA7000 AND TDS7000 SERIES FIRMWARE UPGRADE - V2.5.3) but no drivers on the hardware. I don't know what drivers I need to install for graphics card, touch screen etc...
I already installed pcs completely, but at least I knew all the hardwares boards inside and I can say that sometimes it was not easy, so for a complex oscilloscope like TDS7254, I prefer to take all my precautions which will save me a lot of surprises.
I have to replace the battery of the famous NVRAM. I assume that disconnecting the battery, the data will be lost and it will certainly be necessary to configure everything.
I try to document myself on the information that passes through the COM port. It starts badly, I bought a USB-COM converter and I can't communicate with the oscilloscope. I shunted RD&TD and on my PC terminal when I send a character I receive it. It proves that the USB-COM converter is working.
Translation by go..le

[Claudius089]

@everybody:  repairing his 7154/7254/7404 Scope ( non B Version) .  did you ever think about glue-ing heatsinks on the trigger chips otherwise they will die overtime  and your unit becomes useless.!
    (Chips are obsolete / not available anymore.)

@Claudius089: i hope it is not yet too late.  -> sympthon is edge triggering problems

when working on those units without heatsinks on the trigger chips use a forced airflow over the ACQ board.

Hello @Charlyd
For the moment I have not fully opened the oscilloscope. I replaced the CMOS battery. I'm scheduled to fully open it to replace the NVRAM battery (it's from 2012). When it's disassembled I'll put the heatsinks on the chips.
Thanks for this info.
Translation by go..le

[sucharitha]

hi
TEK TDS7404
not switching on
this condition is
standalone powersupply with mains switch on on the

now its in standby mode

[sucharitha]

now this pic is with rear power distribution board connected between
powersupply & PPC board

[dannybeckett]

Thank you everyone for the massive contributions, and exit-failure on the github repo.

I'm currently repairing a TDS 8000 scope, and unwittingly removed the aquire board nvram battery

Does anyone know if the option rom software works with 8000 series scopes too?

[bg8aak]

I dont find the AGP/PCI select option either,

Do you have solution?

thanks

[bg8aak]

hi,

Could you please give me a copy of TDS7104  win2k image or ghost files?
When I reinstall windows2000 , I met the“UNSUPPORTED HARDWARE DETECTED”

[coromonadalix]

Hi   reviving this thread  loll

What are the problems i may face if the N-vram battery is dead,  i have an 7254B   who began to lock while using it, sometimes take a long time to boot from the TEK DPO  logo / page

Sometimes it hang while running,   but pass all spc tests ??

It has the latest  865 motherboard, the mobo battery was changed 1 week ago, i had clock problems and lan setup lost loll


It has the ds1245y-120  chip  28 pins i think on the power pc board  year 2005,  surely must be dead        

Did manage to copy the vxboot  folder on usb key just in case

[charlyd]

@coromonadalix if you have a programmer always good to replace the nvram DS1245Y of the TDS7254B and solder in a socket.

but from my interrested.  what windows pc  type motherboard is installed in your scope?  i guess Intel desktop but can you share some pictures and also from the vga/ bridge card.

[bg8aak]

hello everyone
I fix the HDD operation system and replace the dead DS1245Y 。due to lack and fake DS1245Y，I use TI BQ4013YMA-70N to replace DS1245Y
It seems worked ok.

I pass all selftest but SPC failed.
I use the console to monitor whats wrong abot SPC test:
0x973310 (Ch1 Gain Cal): >> Error at step ChanCalPart2.36: FineOffset DAC Nonconvergent during cal of Reference (10X) Attenuator Gain

0x2c46a70 (CalWatch): Temperature transition into SPC-supporting range.

Is some DAC  in Acq. board dead？ Is anybody know which DAC is it?

thanks

73!

[coromonadalix]

It's an p4 2,8ghz with 2gb of ram

When i'll re open it  i'll take some pictures ... still need to use it  while it doesn't create / have too many problems

I ordered at digikey  a ds1245y-120  pdip around 50$ CAD ?? the tricky part will be to remove that chip ... will need an vacuum desoldering tool


Did read thru all this thread        for the nvram backup script, i found out i can force a factory reset and apparently put back  stuff in the nvram,  i have no experiences for these kind of stuff  loll  but feel relieved.


Found out that  the motherboard is in DHCP mode for the lan, and apparently or it seems the TEK Scope software will push an ip address ??


Pushed  XP Sp3 pack into it without problems ...  did put XP in classical mode with the ''best optimal mode'' in the performance settings

Managed to find an usb hdd dock with Ide and sata ports who can clone hard drives and i'll do an hdd image just in case

May be tempted to put an pata  ssd in it to slightly optimise to boot time, but mostly to get rid of an aging drive

And i did found out i have a slight touch screen offset, even with the calibration utility, it can't be corrected.

From the middle screen to the bottom, i have around 3 to 5 mm offset in the mouse pointer ...


In my case  all  SPC   tests passes ....  but sometimes the scope hangs without reasons,  have to restart it ?



You have partial service manual for the tds7000 series, but haven't found a complete manual  if there is one ??  Links ??

[charlyd]

@coromonadalix. i used my denon sc7000  to desolder the Dalles chip.  and afterwards i placed this socket.(see picture for the quality type)

i will be happy and curious to see your pictures.
maybe you can share the bios version fro. your unit.
When you enter the bios with [DEL or [F2]  you find a setting called  " silent boot "  enabled .  when switching to disabled you see lots of more info while posting and also bios info.

greetz charly

[coromonadalix]

thks

I did get an nvram bin file and somekind of bios bin file ??   not sure this bios file is the mainboard one ??  The file size seems okay with the extracted bios ??

I know there is an universal bios tool, gonna try this one  too


I have extracted / backed the VXboot folder contents, all the drivers, calibration files  etc ...

I'm gonna post them in a while and send them to KO4BB  too



EDIT

The board is an Intel D865GLC  (Tektronix boot logo)   bios rev : BF86510A.86A.0075.P24

P4 2.8ghz  fsb 533mhz 

Primary video is : pci,   use Tvia Display Driver V.5.2.005


Bios file : just  remove the .txt extension

Bios file extracted thru the nvram backup script ??   remove the .txt extension

Attached files are the files found here and github  to backup the nvram, i used the 6000-7000  one

Edit 2

For the motherboard : it can support up to 4 gig of ddr400 ram and fsb800 cpu ??

Not sure i want to go al the way up ??

Will it affect tekscope ??

Edit 3 
Attached calcons files,  spc was done recently and passed all tests ??

[bg8aak]

Need CalCons files .

Could someone upload there TDS7104 c:\vxBoot\CalCons  files?

like 0~16 0~16.sta
I found 0~15 files match the BANK0~BANK15  and 16/16.sta match user cal SPC data
I met a 521 error
and when I calConStatus = cc_init(2)
I met

0x1641540 (tShell): cc_restoreBank: can't open file C:/vxBoot/calCons/0

0x1641540 (tShell): cc_init: bank 0 chksum failed, NOT reset to factory

etc.

So I need these files. Plase help me
Thanks
VY 73!

[coromonadalix]

here's the calcon of our 7254B,   spc has pass all tests and was done recently

[bg8aak]

thank you