Electronics > Repair
Tektronix DPO4054 stucked at tektronix splash screen
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pcwrangler:
I'm actually working on an MSO4104(non B) and my board doesn't even match that manual. The original manual didn't have the JTAG interface in the service manual. Does anyone have a 4104B that can take a picture of that J9201? I assume it will look similar across the board. Once we have the right interface I can find the pinout.
m k:
Manualslib wasn't very supportive.
Many models were leading to few manuals.

If console is somewhere, like is quite possible, at least one model has a command "Console" in the ROM,
where can it be, where it can't be.

What kind of a connection is the option module, standard USB?

How far from the CPU is the probe?
Is it possible that RS-232 trigger is used as a part of a console port?
ApertureScience:
The Tx Pin is located on the 20-pin connector at the bottom. With the screen facing up, its the 2nd pin in the first row.
Good read on the topic: https://debugmo.de/2013/03/whats-inside-tektronix-dpo5034/
ApertureScience:
I also bought a DPO4054, whis is also stuck at splash screen. Replaced U380 prescaler, but nothing changed. My bootlog suggests either DEMUX or RAM, maybe...

For clarification: The ADC talks to the RAM via the DEMUX chips. There are 4 512Mbyte chips per DEMUX. I tried to layout the functional groups below, based on my guess.


ADCU271DEMUXU270                                 U370RAM U162 U171 U0170 U0180                                 U470 U480 U0462 U0471
analogRF:
can you post the boot log?
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