Electronics > Repair
fluke dsp-2000 and 4x00
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The1:

--- Quote from: davidwf on January 14, 2022, 05:48:26 pm ---Looking for any suggestions as to why, after years of sterling service my Fluke DSP-4000 main unit suddenly just displays some horizontal bands when powered on...it was pworking perfectly when turned off the day before!

--- End quote ---

I have multiple 4100 units like this, i have checked the whole board and seems nothing wrong. I pulled both U17 & U18 AT29LV040A off the board and read in programmer but both modules are dead, i have new ones but unsure of how the flash should be done, the remote unit firmware is less than 4mbit so i have flashed onto both chips and replaced but remote unit still not booting.

The address lines of the 4mbit eeproms goto the MC68307V so it's likely i guess that the firmware is motorola assembly.
hcmsun:
I have a DSP-4300 not booting, The U17 is damaged. Can anyone read the this chip?
Ned70:
Hi Asis,
I’ve just been searching through form posts looking for firmware and standards files for my DSP-4300.  I know considerable time has passed, but do you still have 1.925 and do you have the Standard 5.17 file?  I look forward to hearing from you.
asis:
Hi,

I'm already retired and don't work with these TDRs, but there are some files in the archives on the old PC.
Tell me what you need and give me a link to a file hosting service to which I will try to upload.
The1:
Thanks for taking the time to post, we already have those files, what we need is a read of the internal eeproms from a working unit. To restore the bootloader.
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