MX-2300/2700 N/G SELF DIAG AND TROUBLE CODE 8 – 26
U2-80 EEPROM read/write error
(SCU detection)
U2-81 Adjustment value check sum error
(SCU detection)
U2-90 EEPROM read/write error
(PCU detection)
U2-91 EEPROM (PCU) check sum error
U6-00 Desk communication trouble
U6-01 Tray 1 lift-up trouble
U6-02 Tray 2 lift-up trouble
U6-09 LCC lift motor trouble
Trouble content 1) EEPROM version error
2) Write error to EEPROM
Section Scanner
Case 1 Cause EEPROM trouble, installation of EEPROM which is
not initialized
Check
and
remedy
Check that EEPROM is properly set.
Case 2 Cause SCU PWB EEPROM access circuit trouble
Check
and
remedy
To avoid deletion of the counter data/adjustment data,
use the simulation to save the counter/adjustment
values. (If there is a printer option, execute SIM22-1 to
save the counter data and the adjustment values.)
Replace the SCU PWB. Use SIM16 to cancel the
trouble.
Trouble content EEPROM (SCU) check sum error
Section Scanner
Case 1 Cause Control circuit hang-up due to electrical noises
Check
and
remedy
Use SIM16 to cancel U2 trouble.
Case 2 Cause EEPROM trouble
Check
and
remedy
To avoid deletion of the counter data/adjustment data,
use the simulation to save the counter/adjustment
values. (If there is a printer option, execute SIM22-1 to
save the counter data and the adjustment values.)
Replace the SCU PWB. Use SIM16 to cancel the
trouble.
Case 3 Cause SCU PWB EEPROM access circuit trouble
Check
and
remedy
Check that EEPROM is properly set.
Trouble content EEPROM version error, write error to EEPROM
Section PCU
Case 1 Cause EEPROM trouble, installation of EEPROM which is
not initialized
Check
and
remedy
Check that EEPROM is properly set.
Case 2 Cause PCU PWB EEPROM access circuit trouble
Check
and
remedy
To avoid deletion of the counter data/adjustment data,
use the simulation to save the counter/adjustment
values. (If there is a printer option, execute SIM22-1 to
save the counter data and the adjustment values.)
Replace the PCU PWB. Use SIM16 to cancel the
trouble.
Trouble content Check sum error of adjustment value (PCU)
Section PCU
Case 1 Cause Control circuit hang-up due to electrical noises
Check
and
remedy
Use SIM16 to cancel the trouble.
Case 2 Cause EEPROM trouble.
Check
and
remedy
Check that EEPROM is properly set.
Case 3 Cause PCU PWB EEPROM access circuit trouble
Check
and
remedy
To avoid deletion of the counter data/adjustment data,
use the simulation to save the counter/adjustment
values. (If there is a printer option, execute SIM22-1 to
save the counter data and the adjustment values.)
Replace the PCU PWB.
Trouble content Desk communication error, communication line test
error after turning on the power or canceling the
exclusive simulation
Section PCU
Case 1 Cause Connector and harness connection trouble or
disconnection, desk control PWB trouble, control
PWB (PCU) trouble, malfunction due to electrical
noises
Check
and
remedy
Cancel the trouble by turning OFF/ON. Check the
connector and the harness of the communication line.
Trouble content DLUD1 does not turn ON within the specified time.
Section PCU
Case 1 Cause DLUD1 sensor trouble, tray 1 lift-up motor trouble,
desk PWB, lift-up unit, paper feed unit harness
connection trouble
Check
and
remedy
Check DLUD1 and its harness and connector. Check
the lift-up unit.
Trouble content DLUD2 does not turn ON within the specified time.
Section PCU
Case 1 Cause DLUD2 sensor trouble, tray 2 lift-up motor trouble,
desk PWB, lift-up unit, paper feed unit harness
connection trouble
Check
and
remedy
Check DLUD2 and its harness and connector. Check
the lift-up unit.
Trouble content • The encoder input value is not changed in 0.13sec
(1st time)/0.5sec (2nd time and later) after rotation
of the motor.
• The motor is rotated for 18sec or more.
• The encoder is changed after passing a certain
time from stopping the motor. (2sec, 10 count or
more)
Section PCU
Case 1 Cause Sensor trouble, LCC control PWB trouble, gear
breakage, lift motor trouble
Check
and
remedy
Use SIM4-2 and 4-3 to check the operation of the
sensor and the lift motor. Use SIM15 to cancel the
trouble.
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