Service manual

AL-1651CS TEST COMMAND, TROUBLE CODES 10 - 29
L1 00 Content Feeding is not completed within the specified
time after starting feeding. (The scan head
locking switch is locked)
Detail The white area and the black marking on the
shading plate are used to obtain the difference
in the CCD level values for judgment of lock.
When the difference in the levels of which and
black is small, it is judged that the black mark
could not be scanned by lock and the trouble
code “L1” is displayed.
Cause The scan head is locked by the lock switch.
Mirror unit abnormality
The scanner wire is disconnected.
The origin detection sensor abnormality
Mirror motor harness abnormality
Check
and
remedy
Check to confirm that the scan head lock switch
is released.
Use TC 1-1 to check the mirror reciprocating
operations.
When the mirror does not feed.
Check for disconnection of the scanner wire.
Check the harness and the connector between
the mirror motor and the MCU PWB.
Replace the mirror unit.
Replace the MCU PWB.
When the mirror does feed.
Use TC 1-2 to check the mirror home position
sensor.
L3 00 Content Scanner return trouble
Detail When the mirror base is returned for the
specified time (6 sec) in mirror initializing after
turning on the power, the mirror home position
sensor (MHPS) does not turn ON. Or when the
mirror base is returned for the specified time
(about 6 sec) after start of copy return, the
mirror home position sensor (MHPS) does not
turn ON.
Cause Mirror unit abnormality
Scanner wire disconnection
Origin detection sensor abnormality
Mirror motor harness abnormality
Check
and
remedy
Use TC 1-1 to check the mirror reciprocating
operations.
When the mirror does not return.
Check for disconnection of the scanner wire.
Check the harness and the connector between
the mirror motor and the MCU PWB.
Replace the mirror unit.
Replace the MCU PWB.
When the mirror does feed.
Use TC 1-2 to check the mirror home position
sensor.
L4 01 Content Main motor lock detection
Detail When the main motor encoder pulse is not
detected for 100 msec.
Cause Main motor unit abnormality
Improper connection or disconnection the main
motor and the harness.
MCU PWB abnormality
Check
and
remedy
Use TC 25-01 to check the main motor
operations.
Check connection of the main motor harness/
connector.
Replace the main motor.
Replace the MCU PWB.
Main
code
Sub
code
Details of trouble
L6 10 Content Polygon motor lock detection
Detail The lock signal (specified rpm signal) does not
return within a certain time (about 20 sec) from
starting the polygon motor rotation.
Cause Polygon motor unit abnormality
Improper connection or disconnection of the
polygon motor and the harness.
MCU PWB abnormality
Check
and
remedy
Use TC 61-1 to check the polygon motor
operations.
Check connection of the polygon motor
harness/connector.
Replace the polygon motor.
Replace the MCU PWB.
U2 04 Content EEPROM read/write error (Serial
communication error)
Detail EEPROM access process error
Cause EEPROM abnormality
Check
and
remedy
Check that the EEPROM is properly set.
Use TC 16 to cancel the trouble.
Replace the MCU PWB.
11 Content Counter check sum error (EEPROM)
Detail Check sum error of the counter area in the
EEPROM
Cause EEPROM abnormality
Check
and
remedy
Check that the EEPROM is properly set.
Use TC 16 to cancel the trouble.
Replace the MCU PWB.
U9 99 Content Operation panel language error
Detail There is no language file.
The language file is destroyed.
Cause Language file abnormality
MCU PWB abnormality
Check
and
remedy
MCU firmware download
Replace the MCU PWB.
Main
code
Sub
code
Details of trouble