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5FF
(2) Self diagnostic codes
Code
C0420
Communication problem
Communication errors from the com-
munication microcomputer on the
copier main PCB:
No communication: there is no reply
after 3 retries.
Abnormal communication: a communi-
cation error (parity or checksum error)
is detected five times in succession.
C1100
Paper deck motor 1 problem
A motor over-current signal is detected
continuously for 1 s or longer.
C1110
Paper deck motor 2 problem
A motor over-current signal is detected
continuously for 1 s or longer.
C1120
Deck right lift position problem
Deck level switch 2 does not turn on
within 30 s of paper deck motor 2 turn-
ing on.
C1130
Deck left lift position problem
Deck level switch 2 does not turn on
within 30 s of paper deck motor 2 turn-
ing on.
1-3-6
Contents
Causes
Check procedures/corrective measures
Poor contact of
Check the connection of connectors CN3
the connector ter-
on the copier main PCB and CN1 on the
minals.
deck main PCB, and the continuity across
the connector terminals. Remedy or re-
place if necessary.
Defective copier
Replace the copier main PCB and check
main PCB.
for correct operation.
Defective deck
Replace the deck main PCB and check for
main PCB.
correct operation.
Paper deck motor
Check the gears and remedy if necessary.
1 does not rotate
correctly (the mo-
tor is overloaded).
Paper deck motor
Reinsert the connector. Also check for con-
1 connector
tinuity within the connector cable. If none,
makes poor con-
repair or replace the cable.
tact.
Paper deck motor
Check the gears and remedy if necessary.
2 does not rotate
correctly (the mo-
tor is overloaded).
Paper deck motor
Reinsert the connector. Also check for con-
2 connector
tinuity within the connector cable. If none,
makes poor
repair or replace the cable.
contact.
Defective deck
Check if CN5-4 on the desk main PCB
level switch 2.
goes low when desk level switch 2 is
turned off. If not, replace desk level switch
2.
Poor contact of
Reinsert the connector. Also check for con-
deck level switch
tinuity within the connector cable. If none,
2 connector termi-
repair or replace the cable.
nals.
Defective paper
Check for continuity across the coil. If
deck motor 2.
none, replace paper desk motor 2.
Poor contact of
Reinsert the connector. Also check for con-
paper deck motor
tinuity within the connector cable. If none,
2 connector termi-
repair or replace the cable.
nals.
The deck right lift
Check the gears and belts, and remedy if
does not rise
necessary.
properly.
Defective deck
Check if CN5-7 on the desk main PCB
level switch 1.
goes low when desk level switch 1 is
turned off. If not, replace desk level switch
1.
Poor contact of
Reinsert the connector. Also check for con-
deck level switch
tinuity within the connector cable. If none,
1 connector termi-
repair or replace the cable.
nals.
Remarks
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