4–7Troubleshooting
DCU RAM
Instruction Indication Yes No
1. Cycle power: Turn printer off.
Wait 15 seconds. Turn printer
on.
“DCU RAM” message. Go to step 2. Return printer to
normal operation.
2. Press the control panel
switch that clears fault
indications.
“DCU RAM” message. Replace DPU and
RTPU on
controller board.
(See Appendix C.)
Go to step 3.
Return printer to
normal operation.
3. Run a diagnostic self–test
(page 4–37).
“DCU RAM” message. Replace all RAM
on controller
board. (See
Appendix C.) Go
to step 4.
Return printer to
normal operation.
4. Run a diagnostic self–test
(page 4–37).
“DCU RAM” message. Replace controller
board.
Return printer to
normal operation.
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