Sharp AL-1611 Service Manual page 55

Main Sub
code code
L3 00 Cause Mirror unit
Mirror home position sensor defect
MCU PWB defect Scanner wire discon-
nection
Check and Check the scanning operation with SIM
remedy 1-1.
L4 01 Content Main motor lock
Detail The main motor encoder pulse is not
detected for 400msec.
Cause Main motor defect
Harness disconnection between the
MCU PWB and the main motor.
Control circuit failure
Check and Check the main motor operation with
remedy SIM 25-1.
Check the harness and the connector
between the MCU PWB and the main
motor.
10 Content Job separator motor trouble
Details When the home is not detected within
2.5 sec after the job separator tray starts
to move upwards.
Cause The job separator upper limit detection
sensor is defective.
The job separator motor is defective.
The job separator motor periphery circuit
is defective. The condition of the MCU
PWB JP5 is wrong.
Check and Check the job separator operation by
countermea- means of SIM3-2 and 4.
sure Check the harnesses and connectors.
Check whether the condition of the MCU
PWB JP5 is correct.
L6 10 Content Polygon motor lock
Detail The lock signal (the specified rotation
speed signal) is not supplied within the
specified time (about 6 sec) after starting
the polygon motor rotation.
Cause LSU connector disconnection or harness
disconnection in the LSU.
Check and Check the operation of the polygon
remedy motor with SIM 25-10.
Check the harness and the connector
connection. LSU replacement
L8 01 Content Zero cross pulse (FW) trouble
Detail Zero cross pulse width is shifted by 55Hz
10% or more.
Cause MCU PWB defect Power supply unit
breakdown
Check and Check the harness and the connector.
remedy MCU PWB replacement Power supply
unit replacement
U2 04 Content EEPROM serial communication error
Detail Error in communication with EEPROM
Cause EEPROM failure
Installation of uninitialized EEPROM
MCU PWB EERPOM access circuit fail-
ure
Check and Check that the EEPROM is properly set.
remedy To prevent against loss of counter/
adjustment values, record the values
with simulation.
U2 trouble cancel with SIM 16 MCU
PWB replacement
Detail of trouble
AL-1611/AL-1622 TROUBLE CODE LIST
10 – 5
Main Sub
code code
U2 11 Content Counter check sum error
Detail Counter check sum value stored in the
EEPROM is abnormal.
Cause EEPROM failure
Control circuit hung up by noises
MCU PWB EEPROM access circuit
defect
Check and Check that the EEPROM is properly set.
remedy To prevent against loss of counter/
adjustment values, record the values
with simulation.
U2 trouble cancel with SIM 16 MCU
PWB replacement
12 Content Adjustment value check sum error
(EEPROM)
Detail Adjustment value data area check sum
error
Cause EEPROM failure
Control circuit hung up by noises
MCU PWB EEPROM access circuit fail-
ure
Check and Check that the EEPROM is properly set.
remedy To prevent against loss of counter/
adjustment values, record the values
with simulation.
U2 trouble cancel with SIM 16 MCU
PWB replacement
40 Content CRUM communication error
Detail Toner cartridge CRUM data read error
Cause A toner cartridge of a different destina-
tion is installed.
EEPROM trouble
Check the destination setup.
Toner cartridge CRUM PWB trouble
MCU PWB trouble
CRUM connector disconnection
Check and Install a specified toner cartridge.
remedy Check the SIM 26-6 setup.
Replace the EEPROM. Replace the
toner cartridge.
Replace the MCU PWB.
Check connection of the CRUM connec-
tor.
Execute SIM 16.
U3 29 Content Mirror base home position error
Detail Home position is not detected when
starting mirror base shift.
Cause Mirror unit defect
Mirror home position sensor defect
MCU PWB decfect
Scanner wire disconnection
Check and Check the scanning operation with SIM
remedy 1-1.
U9 00 Content Communication trouble between MCU
and OPE (OPE detection)
Detail Communication setup error, framing,
parity, protocol error
Cause Operation control PWB connector dis-
connection
Operation control PWB MCU PWB har-
ness failure
Check and Check the connectors and harness of
remedy the operation control PWB and the MCU
PWB.
Check grounding of the machine.
Check the ROM of the operation control
PWB.
Detail of trouble