Read Sharp AL-2020 (serv.man2) Service Manual online
AL-2040 SIMULATION, TROUBLE CODES 10 - 19
L1
00
Content Feeding is not completed within the
specified time after starting feeding. (The
scan head locking switch is locked)
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.
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
Mirror unit abnormality
The scanner wire is disconnected.
The origin detection sensor abnormality
Mirror motor harness abnormality
Check
and
remedy
and
remedy
Check to confirm that the scan head lock
switch is released.
Use SIM 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 SIM 1-2 to check the mirror home
position sensor.
switch is released.
Use SIM 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 SIM 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.
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
Scanner wire disconnection
Origin detection sensor abnormality
Mirror motor harness abnormality
Check
and
remedy
and
remedy
Use SIM 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 SIM 1-2 to check the mirror home
position sensor.
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 SIM 1-2 to check the mirror home
position sensor.
Main
code
code
Sub
code
Details of trouble
L4
01
Content Main motor lock detection
Detail
When the main motor encoder pulse is not
detected for 100 msec.
detected for 100 msec.
Cause
Main motor unit abnormality
Improper connection or disconnection the
main motor and the harness.
MCU PWB abnormality
Improper connection or disconnection the
main motor and the harness.
MCU PWB abnormality
Check
and
remedy
and
remedy
Use SIM 25-01 to check the main motor
operations.
Check connection of the main motor
harness/connector.
Replace the main motor.
Replace the MCU PWB.
operations.
Check connection of the main motor
harness/connector.
Replace the main motor.
Replace the MCU PWB.
32
Content Exhaust fan motor lock detection trouble
Detail
The error detection is started after 2 sec
from starting rotation of the exhaust fan
motor.
1) The continuous rotation state of 250ms
from starting rotation of the exhaust fan
motor.
1) The continuous rotation state of 250ms
is not detected for 1 sec after starting
detection.
detection.
2) When the lock sensor (in the exhaust
fan) detects the HIGH level (unstable)
after detection the lock state (stable
state).
after detection the lock state (stable
state).
Cause
Exhaust fan motor connector connection
trouble
Exhaust fan motor trouble
MCU PWB trouble
trouble
Exhaust fan motor trouble
MCU PWB trouble
Check
and
remedy
and
remedy
Exhaust fan motor connector connection
check
Exhaust fan motor replacement
Replace the MCU PWB.
check
Exhaust fan motor replacement
Replace the MCU PWB.
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.
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
Improper connection or disconnection of
the polygon motor and the harness.
MCU PWB abnormality
Check
and
remedy
and
remedy
Use SIM 61-1 to check the polygon motor
operations.
Check connection of the polygon motor
harness/connector.
Replace the polygon motor.
Replace the MCU PWB.
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
and
remedy
Check that the EEPROM is properly set.
Use SIM 16 to cancel the trouble.
Replace the MCU PWB.
Use SIM 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
EEPROM
Cause
EEPROM abnormality
Check
and
remedy
and
remedy
Check that the EEPROM is properly set.
Use SIM 16 to cancel the trouble.
Replace the MCU PWB.
Use SIM 16 to cancel the trouble.
Replace the MCU PWB.
Main
code
code
Sub
code
Details of trouble
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