2NC/2NF/2NG/2NN/3P7/3P8/3P9
1-4-35
F040 Communication error
between Main/Engine PWB
and Print engine
Main/Engine PWB
1. Turn the main power swtch off and after
5 seconds, then turn power on.
2. Repair or replace the wire from the main/
engine PWB, that may be grounded.
(Check short-circuit between 5V and
3.3V.)
3. Check the main/engine software and
upgrade to the latest, if necessary.
4. If not corrected, replace the main/engine
PWB (see page 2-2-11).
F050 Print engine ROM check-
sum error
Main/Engine PWB
1. Turn the main power swtch off and after
5 seconds, then turn power on.
2. Confirm that the EEPROM has been
properly installed.
3. Check the main/engine software and
upgrade to the latest, if necessary.
4. If not corrected, Replace the main/
engine PWB (see page 2-2-11).
Code Contents Related parts
Check procedures/
corrective measures
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