Electronics > Repair
DL1540 Repair
cattlot:
Hi all, first time posting here, Currently repairing this non-booting DL1540, on the main cpu board i probed these abnormal signals being sent to the analog board, in general does anyone know what could be causing these signal instabilities?
The board and daughterboards were all powered by an external supply?
Tracing the pins back they all go through different hex inverters or diffrerent trancivers so one chip cannot be the root cause of the problem,
thanks for any replies :)
indeterminate:
Your probably barking up the wrong tree.
Start with what is a DL1540 when was it maid a photo of the cpu card.
are the power rails correct & noise free
is there a clock signal on the cpu
is the cpu out of reset
is the eprom enabled
is there activity on the data bus
is there activity on the address bus
Swake:
Yokogawa scope?
cattlot:
yes it is, I forgot to mention that it is an oscilloscope. Whoops. It is a yokogawa oscilloscope DL 1540
Swake:
You write it is not booting. Is there a logo shown on the screen or absolutely nothing?
As it is a CRT if there is nothing on the screen it might be that the issue is with the CRT itself, not with the rest of the scope. Let's start with that.
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