2PX/2PY
1-4-26
F000 Main PWB - operation panel 
PWB communication error
Defective main 
PWB.
Turn the main power switch off/on to restart 
the machine. If the error is not resolved, 
replace main PWB (see page 1-5-30).
Defective opera-
tion panel PWB.
Replace the operation panel PWB and 
check for correct operation.
F010 Main PWB checksum error Defective main 
PWB.
Turn the main power switch off/on to restart 
the machine. If the error is not resolved, 
replace main PWB (see page 1-5-30).
F020 Main PWB RAM checksum 
error
Defective main 
memory (RAM) on 
the main PWB.
Turn the main power switch off/on to restart 
the machine. If the error is not resolved, 
replace main PWB (see page 1-5-30).
Defective 
expanded memory 
(DIMM).
Replace the expanded memory (DIMM) (see 
page 1-2-12).
F040 Main PWB - print engine 
communication error
Defective main 
PWB.
Turn the main power switch off/on to restart 
the machine. If the error is not resolved, 
replace main PWB (see page 1-5-30).
Replace the engine PWB and check for cor-
rect operation (see page 1-5-27).
F041 Main PWB - scanner engine 
communication error
Defective main 
PWB.
Turn the main power switch off/on to restart 
the machine. If the error is not resolved, 
replace main PWB (see page 1-5-30).
F050 Print engine ROM check-
sum error
Defective engine 
PWB.
Turn the main power switch off/on to restart 
the machine. If the error is not resolved, 
replace engine PWB (see page 1-5-27).
F051 Scanner engine ROM 
checksum error
Defective engine 
PWB.
Turn the main power switch off/on to restart 
the machine. If the error is not resolved, 
replace engine PWB (see page 1-5-27).
F278 Power supply in drive sys-
tem error
Main power switch 
was turned off 
without using the 
power key, or a 
power failure has 
occurred.
Turn on power.
(To switch off power, first press the power 
key until the main power indicator goes off, 
then turn the main power switch off.)
Code Contents Causes
Check procedures/
corrective measures