Printronix P9012, Maintenance Manual

Page: 71 / 256

4–5 Troubleshooting
CHANGE RIBBON
Instruction Indication Yes No
1. Check for fault message
when using the
RibbonMinder feature. CHANGE RIBBON
message. Replace the
ribbon. —
COOLING
Instruction Indication Yes No
1. Check for inoperative blower
assembly, air flow sensor, or
MCU PCBA. COOLING message. Replace one at a
time, in the
following order,
until the message
disappears:
mechanism driver,
MCU PCBA,
sensor, blower. —
FONT PROM *
Instruction Indication Yes No
1. Set power switch to O (OFF).
Wait 5 seconds. Set power
switch to 1 (ON). FONT PROM *
message. Step 2. Return printer to
normal operation.
2. Press the CLEAR switch. FONT PROM *
message. Step 3. Return printer to
normal operation.
3. Run a diagnostic self–test
(page 4–14). FONT PROM *
message. Replace all font
PROM chips on
the DCU PCBA. Return printer to
normal operation.