2PS/2PT
1-4-28
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 1-5-29).
Defective
expanded memory
(DIMM).
Replace the expanded memory (DIMM) (see
page 1-2-10).
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 1-5-29).
Defective engine
PWB.
Replace the engine PWB and check for cor-
rect operation (see page 1-5-26).
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 1-5-26).
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, then turn the main power switch off.)
Code Contents Causes
Check procedures/
corrective measures