Eeprom Read/Write Error (Scu Detection); Adjustment Value Check Sum Error (Scu Detection); Eeprom Read/Write Error (Pcu Detection); Eeprom (Pcu) Check Sum Error - Sharp MX-2300 G Service Manual

U2-80 EEPROM read/write error
(SCU detection)
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 Check that EEPROM is properly set.
and
remedy
Case 2 Cause SCU PWB EEPROM access circuit trouble
Check To avoid deletion of the counter data/adjustment data,
and use the simulation to save the counter/adjustment
remedy 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.
U2-81 Adjustment value check sum error
(SCU detection)
Trouble content EEPROM (SCU) check sum error
Section Scanner
Case 1 Cause Control circuit hang-up due to electrical noises
Check Use SIM16 to cancel U2 trouble.
and
remedy
Case 2 Cause EEPROM trouble
Check To avoid deletion of the counter data/adjustment data,
and use the simulation to save the counter/adjustment
remedy 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 Check that EEPROM is properly set.
and
remedy
U2-90 EEPROM read/write error
(PCU detection)
Trouble content EEPROM version error, write error to EEPROM
Section PCU
Case 1 Cause EEPROM trouble, installation of EEPROM which is
not initialized
Check Check that EEPROM is properly set.
and
remedy
Case 2 Cause PCU PWB EEPROM access circuit trouble
Check To avoid deletion of the counter data/adjustment data,
and use the simulation to save the counter/adjustment
remedy 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.
MX-2300/2700 N/G SELF DIAG AND TROUBLE CODE 8 – 26
U2-91

EEPROM (PCU) check sum error

Trouble content Check sum error of adjustment value (PCU)
Section PCU
Case 1 Cause Control circuit hang-up due to electrical noises
Check Use SIM16 to cancel the trouble.
and
remedy
Case 2 Cause EEPROM trouble.
Check Check that EEPROM is properly set.
and
remedy
Case 3 Cause PCU PWB EEPROM access circuit trouble
Check To avoid deletion of the counter data/adjustment data,
and use the simulation to save the counter/adjustment
remedy values. (If there is a printer option, execute SIM22-1 to
save the counter data and the adjustment values.)
Replace the PCU PWB.
U6-00 Desk communication trouble
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 Cancel the trouble by turning OFF/ON. Check the
and connector and the harness of the communication line.
remedy
U6-01 Tray 1 lift-up trouble
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 Check DLUD1 and its harness and connector. Check
and the lift-up unit.
remedy
U6-02 Tray 2 lift-up trouble
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 Check DLUD2 and its harness and connector. Check
and the lift-up unit.
remedy
U6-09 LCC lift motor trouble
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 Use SIM4-2 and 4-3 to check the operation of the
and sensor and the lift motor. Use SIM15 to cancel the
remedy trouble.