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Hi Rodd,
sorry for my long span of inactivity on EDAboard.
I just started a new thread containing the schematic for reconstructing the -DROE signal.
This is also because I recently got another request via PM.
Quick Replies and replies to Private Messages obviously cannot contain attachments -...
Tek 2710 Spectrum Analyzer -DROE reconstruction logic
Dear Fellows,
I opened this thread to attach the schematic of the reconstruction logic
for the -DROE signal with a failed PLD U352 (PLS173).
I can give no warranty for correctness of the shared information,
but it is to my best knowledge...
tektronix 2712 repair
I just upload a possible fix for this (new/different) problem.
It assumes that the EW- signal is not generated, so that the CPU cannot write any registers on the display storage board (despite the marker positions).
Of course, the old connection(s) between U352 and U438...
spectrum analyzer tektronix 2710
Hello,
the failure mode "analog only" seems to have a different cause. However, the cause might reside within the same PLD (U352, PLS173).
Attached is a draft address-map of the display-storage board. Although I believe that the information is correct, there...
tektronix 2710 doc
By the way, does someone have a datasheet for the National Semiconductors DM86S64 character generator?
Only information I found is that it is contained in an old 1980 memory data book.
manual tektronix 2710
Congratulations, David!
Assuming that any PLD could fail, and that any part of even one specific PLD could fail, my confidence decreased, but the symptoms seem to direct specifically onto this one fault.
FvM: The GAL22V10 will probably work. Some of the pins used on the...
2710 tektronix service manual
It is a PLS173 from Signetics / Philips / NXP. There are a total of 10 (ten) devices from this series on the display storage board, each dissipating 600 to 750mW, causing much heat. They are indeed programmed by burning NiCr fuses.
I also had this thought to...
manual old instrument tektronix
Hi,
here is another 2710 which had this problem.
I bought it from a colleague who described these symptoms before repair:
- Power-on messages about NVRAM / file system errors
- Spurious characters on the display
- Useless files which could not be deleted
After...
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