AL-1611/AL-1622
TROUBLE CODE LIST
10 – 5
L3
00
Cause
Mirror unit
Mirror home position sensor defect
MCU PWB defect Scanner wire discon-
nection
Check and
remedy
Check the scanning operation with SIM
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
remedy
Check the main motor operation with
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
countermea-
sure
Check the job separator operation by
means of SIM3-2 and 4.
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
remedy
Check the operation of the polygon
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
m
10% or more.
Cause
MCU PWB defect Power supply unit
breakdown
Check and
remedy
Check the harness and the connector.
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
remedy
Check that the EEPROM is properly set.
To prevent against loss of counter/
adjustment values, record the values
with simulation.
U2 trouble cancel with SIM 16 MCU
PWB replacement
Main
code
Sub
code
Detail of trouble
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
remedy
Check that the EEPROM is properly set.
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
remedy
Check that the EEPROM is properly set.
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
remedy
Install a specified toner cartridge.
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
remedy
Check the scanning operation with SIM
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
remedy
Check the connectors and harness of
the operation control PWB and the MCU
PWB.
Check grounding of the machine.
Check the ROM of the operation control
PWB.
Main
code
Sub
code
Detail of trouble