Sharp MX-6500N / MX-7500N (serv.man21) Service Manual ▷ View online
MX-7500N TROUBLESHOOTING 7 – 13
C1-05
Charger cleaner trouble (M)
C1-07
Charger cleaner trouble (Y)
C1-10
Main charger trouble (Monochrome)
C1-14
Main charger trouble (Color)
C4-00
PTC trouble
C4-01
PTC (Pre Transfer Charger) cleaner
trouble
trouble
Trouble content
Detail
PCU
Cause
The main charger unit (M) is not installed properly.
There is an abnormality in the main charger unit (M).
Connector connection trouble of the drum unit (M) HP
sensor, the discharge lamp, or the after-transfer
discharge lamp.
Harness disconnection of the drum unit (M) HP
sensor, the discharge lamp, or the after-transfer
discharge lamp.
HP sensor dirt.
Charger cleaner motor (M) trouble.
PCU PWB connector connection trouble/PWB trouble.
There is an abnormality in the main charger unit (M).
Connector connection trouble of the drum unit (M) HP
sensor, the discharge lamp, or the after-transfer
discharge lamp.
Harness disconnection of the drum unit (M) HP
sensor, the discharge lamp, or the after-transfer
discharge lamp.
HP sensor dirt.
Charger cleaner motor (M) trouble.
PCU PWB connector connection trouble/PWB trouble.
Check & Remedy
Use SIM6-4 to check the operation of the charger
cleaner.
Check disconnection of the main charger unit./
Replace.
Check for disconnection of the connector of the drum
unit (M) HP sensor, the discharge lamp, and the after-
transfer discharge lamp.
Check the harness of the drum unit (M) HP sensor,
the discharge lamp, and the after-transfer discharge
lamp. (Since the earth wire is common to them, check
the three positions.)
Clean the HP sensor.
Check disconnection of the PCU PWB connector./
Replace PWB.
Replace the charger cleaner motor (M).
cleaner.
Check disconnection of the main charger unit./
Replace.
Check for disconnection of the connector of the drum
unit (M) HP sensor, the discharge lamp, and the after-
transfer discharge lamp.
Check the harness of the drum unit (M) HP sensor,
the discharge lamp, and the after-transfer discharge
lamp. (Since the earth wire is common to them, check
the three positions.)
Clean the HP sensor.
Check disconnection of the PCU PWB connector./
Replace PWB.
Replace the charger cleaner motor (M).
Trouble content
Detail
PCU
Cause
The main charger unit (Y) is not installed properly.
There is an abnormality in the main charger unit (Y).
Connector connection trouble of the drum unit (Y) HP
sensor, the discharge lamp, or the after-transfer
discharge lamp.
Harness disconnection of the drum unit (Y) HP
sensor, the discharge lamp, or the after-transfer
discharge lamp.
HP sensor dirt.
Charger cleaner motor (Y) trouble.
PCU PWB connector connection trouble/PWB trouble.
There is an abnormality in the main charger unit (Y).
Connector connection trouble of the drum unit (Y) HP
sensor, the discharge lamp, or the after-transfer
discharge lamp.
Harness disconnection of the drum unit (Y) HP
sensor, the discharge lamp, or the after-transfer
discharge lamp.
HP sensor dirt.
Charger cleaner motor (Y) trouble.
PCU PWB connector connection trouble/PWB trouble.
Check & Remedy
Use SIM6-4 to check the operation of the charger
cleaner.
Check disconnection of the main charger unit./
Replace.
Check for disconnection of the connector of the drum
unit (Y) HP sensor, the discharge lamp, and the after-
transfer discharge lamp.
Check the harness of the drum unit (Y) HP sensor, the
discharge lamp, and the after-transfer discharge lamp.
(Since the earth wire is common to them, check the
three positions.)
Clean the HP sensor.
Check disconnection of the PCU PWB connector./
Replace PWB.
Replace the charger cleaner motor (Y).
cleaner.
Check disconnection of the main charger unit./
Replace.
Check for disconnection of the connector of the drum
unit (Y) HP sensor, the discharge lamp, and the after-
transfer discharge lamp.
Check the harness of the drum unit (Y) HP sensor, the
discharge lamp, and the after-transfer discharge lamp.
(Since the earth wire is common to them, check the
three positions.)
Clean the HP sensor.
Check disconnection of the PCU PWB connector./
Replace PWB.
Replace the charger cleaner motor (Y).
Trouble content
Detail
PCU
Cause
The main charger unit (K) is not installed properly.
There is an abnormality in the main charger unit (K).
The developer unit (K) is not installed properly.
There is an abnormality in the developer unit (K).
Disconnection of the high voltage MC PWB connector.
Breakage of the high voltage harness.
High voltage MC PWB trouble.
PCU PWB trouble.
There is an abnormality in the main charger unit (K).
The developer unit (K) is not installed properly.
There is an abnormality in the developer unit (K).
Disconnection of the high voltage MC PWB connector.
Breakage of the high voltage harness.
High voltage MC PWB trouble.
PCU PWB trouble.
Check & Remedy
Check the output of the main charger with SIM8-2.
Check the output of the developing bias with SIM8-1.
Check disconnection of the main charger./Replace.
Check disconnection of the developer unit./Replace.
Check disconnection of the high voltage MC PWB
connector./Replace.
Replace the high voltage MC PWB.
Replace the PCU PWB.
Check the output of the developing bias with SIM8-1.
Check disconnection of the main charger./Replace.
Check disconnection of the developer unit./Replace.
Check disconnection of the high voltage MC PWB
connector./Replace.
Replace the high voltage MC PWB.
Replace the PCU PWB.
Trouble content
Detail
PCU
Cause
The main charger unit (CMY) is not installed properly.
There is an abnormality in the main charger unit
(CMY).
The developer unit (CMY) is not installed properly.
There is an abnormality in the developer unit (CMY).
Disconnection of the high voltage MC PWB connector.
Breakage of the high voltage harness.
High voltage MC PWB trouble.
PCU PWB trouble.
There is an abnormality in the main charger unit
(CMY).
The developer unit (CMY) is not installed properly.
There is an abnormality in the developer unit (CMY).
Disconnection of the high voltage MC PWB connector.
Breakage of the high voltage harness.
High voltage MC PWB trouble.
PCU PWB trouble.
Check & Remedy
Check the output of the main charger with SIM8-2.
Check disconnection of the main charger./Replace.
Check disconnection of the developer unit./Replace.
Check disconnection of the high voltage MC PWB
connector./Replace.
Replace the high voltage MC PWB
Replace the PCU PWB.
Check disconnection of the main charger./Replace.
Check disconnection of the developer unit./Replace.
Check disconnection of the high voltage MC PWB
connector./Replace.
Replace the high voltage MC PWB
Replace the PCU PWB.
Trouble content
Detail
PCU
Cause
The PTC unit is not properly installed.
PTC unit trouble.
High voltage 2TC PWB trouble.
PCU PWB trouble.
Connector, harness connection trouble.
PTC unit trouble.
High voltage 2TC PWB trouble.
PCU PWB trouble.
Connector, harness connection trouble.
Check & Remedy
Replace the PTC unit.
Replace the high voltage 2TC PWB.
Replace the PCU PWB.
Check connection of the connector and the harness.
Replace the high voltage 2TC PWB.
Replace the PCU PWB.
Check connection of the connector and the harness.
Trouble content
Shifting the charger cleaner is not completed within
the specified time.
the specified time.
Detail
PCU
Cause
Charger unit trouble
HP sensor, motor, PCU PWB, harness connection
trouble
HP sensor, motor, PCU PWB, harness connection
trouble
Check & Remedy
Check the charger unit, the PCU PWB, and the
harness connection.
harness connection.
MX-7500N TROUBLESHOOTING 7 – 14
C4-20
Primary transfer output open trouble
C4-21
Primary transfer output short trouble
C4-30
Secondary transfer output open
trouble
trouble
C4-31
Secondary transfer output short
trouble
trouble
E6-10
Shading error (Black correction)
E6-11
Shading error (White correction)
E6-14
CCD-ASIC error
E7-01
MFP image data error
Trouble content
When the primary transfer output is delivered, the
output voltage exceeds the specified level.
output voltage exceeds the specified level.
Detail
Primary transfer
Cause
Primary transfer unit abnormality.
Primary transfer unit insertion trouble.
1TC output harness disconnection, breakage.
Primary transfer unit separation operation trouble.
OPC drum abnormality (Does not rotate.)
High voltage 1TC PWB trouble.
PCU PWB trouble.
PCU PWB - high voltage 1TC PWB harness
disconnection, breakage.
Primary transfer unit insertion trouble.
1TC output harness disconnection, breakage.
Primary transfer unit separation operation trouble.
OPC drum abnormality (Does not rotate.)
High voltage 1TC PWB trouble.
PCU PWB trouble.
PCU PWB - high voltage 1TC PWB harness
disconnection, breakage.
Check & Remedy
Replace the primary transfer unit.
Reinsert the primary transfer unit.
Check or replace the 1TC output harness.
Replace the high voltage 1TC PWB.
Replace the PCU PWB.
Check the harness between the PCU PWB and the
high voltage 1TC PWB, and replace as needed.
Reinsert the primary transfer unit.
Check or replace the 1TC output harness.
Replace the high voltage 1TC PWB.
Replace the PCU PWB.
Check the harness between the PCU PWB and the
high voltage 1TC PWB, and replace as needed.
Trouble content
When the primary transfer output is delivered, the
output voltage does not reach the specified level.
output voltage does not reach the specified level.
Detail
Primary transfer
Cause
Primary transfer unit abnormality.
Primary transfer unit insertion trouble.
High voltage 1TC PWB trouble.
PCU PWB trouble.
PCU PWB - high voltage 1TC PWB harness
disconnection, breakage.
Primary transfer unit insertion trouble.
High voltage 1TC PWB trouble.
PCU PWB trouble.
PCU PWB - high voltage 1TC PWB harness
disconnection, breakage.
Check & Remedy
Replace the primary transfer unit.
Reinsert the primary transfer unit.
Replace the high voltage 1TC PWB.
Replace the PCU PWB.
Check the harness between the PCU PWB and the
high voltage 1TC PWB, and replace as needed.
Reinsert the primary transfer unit.
Replace the high voltage 1TC PWB.
Replace the PCU PWB.
Check the harness between the PCU PWB and the
high voltage 1TC PWB, and replace as needed.
Trouble content
When the secondary transfer output is delivered, the
output voltage exceeds the specified level.
output voltage exceeds the specified level.
Detail
Secondary transfer
Cause
2TC output harness disconnection, breakage
High voltage 2TC PWB trouble.
PCU PWB trouble.
PCU PWB - high voltage 2TC PWB harness
disconnection, breakage.
Secondary transfer unit abnormality.
Primary transfer unit insertion trouble.
Secondary transfer unit not installed.
High voltage 2TC PWB trouble.
PCU PWB trouble.
PCU PWB - high voltage 2TC PWB harness
disconnection, breakage.
Secondary transfer unit abnormality.
Primary transfer unit insertion trouble.
Secondary transfer unit not installed.
Check & Remedy
Check or replace the 2TC output harness.
Replace the high voltage 2TC PWB.
Replace the PCU PWB.
Check the harness between the PCU PWB and the
high voltage 2TC PWB, and replace as needed.
Check or replace the secondary transfer unit.
Check or replace the primary transfer unit.
Replace the high voltage 2TC PWB.
Replace the PCU PWB.
Check the harness between the PCU PWB and the
high voltage 2TC PWB, and replace as needed.
Check or replace the secondary transfer unit.
Check or replace the primary transfer unit.
Trouble content
When the secondary transfer output is delivered, the
output voltage does not reach the specified level.
output voltage does not reach the specified level.
Detail
Secondary transfer
Cause
Secondary transfer unit abnormality.
Primary transfer unit insertion trouble.
Secondary transfer unit not installed.
2TC output harness disconnection, breakage
High voltage 2TC PWB trouble.
PCU PWB trouble.
PCU PWB - high voltage 2TC PWB harness
disconnection, breakage.
Primary transfer unit insertion trouble.
Secondary transfer unit not installed.
2TC output harness disconnection, breakage
High voltage 2TC PWB trouble.
PCU PWB trouble.
PCU PWB - high voltage 2TC PWB harness
disconnection, breakage.
Check & Remedy
Check or replace the secondary transfer unit.
Check or replace the primary transfer unit.
Check or replace the 2TC output harness.
Replace the high voltage 2TC PWB.
Replace the PCU PWB.
Check the harness between the PCU PWB and the
high voltage 2TC PWB, and replace as needed.
Check or replace the primary transfer unit.
Check or replace the 2TC output harness.
Replace the high voltage 2TC PWB.
Replace the PCU PWB.
Check the harness between the PCU PWB and the
high voltage 2TC PWB, and replace as needed.
Detail
SCU
Cause
Installation error of the CCD unit harness.
CCD unit trouble.
DSPF PWB trouble.
CCD unit trouble.
DSPF PWB trouble.
Check & Remedy
Check the installing state of the harness to the CCD
unit.
Check the CCD unit.
Check the DSPF PWB.
unit.
Check the CCD unit.
Check the DSPF PWB.
Detail
SCU
Cause
Installation error of the CCD unit harness.
Copy lamp lighting trouble.
Dirt on the mirror, the lens, or the reference white
plate.
CCD unit trouble.
DSPF PWB trouble.
Shading SIM not executed / Shading ROM
abnormality.
Copy lamp lighting trouble.
Dirt on the mirror, the lens, or the reference white
plate.
CCD unit trouble.
DSPF PWB trouble.
Shading SIM not executed / Shading ROM
abnormality.
Check & Remedy
Check the installing state of the harness the CCD unit.
Check the installing state of the harness to the copy
lamp unit.
Clean the mirror, the lens, or the reference white plate.
Check the CCD unit.
Check the DSPF PWB.
Check the installing state of the harness to the copy
lamp unit.
Clean the mirror, the lens, or the reference white plate.
Check the CCD unit.
Check the DSPF PWB.
Trouble content
Detail
SCU
Cause
DSPF PWB trouble.
Check & Remedy
Check the DSPF PWB.
Trouble content
Detail
MFP
Cause
Image data transfer error in the MFPC PWB.
MFPC PWB trouble.
MFPC PWB trouble.
Check & Remedy
Check connection of the connector and the harness of
the MFPC PWB.
Check or replace the MFPC PWB.
the MFPC PWB.
Check or replace the MFPC PWB.
MX-7500N TROUBLESHOOTING 7 – 15
E7-02
HDD trouble when the mirroring kit is
installed
installed
E7-03
HDD trouble (When the mirroring kit is
not installed)
not installed)
E7-03
HDD trouble
(When the mirroring kit is installed)
(When the mirroring kit is installed)
E7-04
HDD-ASIC error
E7-07
SD card error
E7-10
Shading error (Black correction)
E7-11
Shading error (White correction)
E7-14
CCD-ASIC error
Trouble content
Detail
MFP
Cause
When installing the mirroring kit, the HDD of the
machine or the HDD of the mirroring kit breaks down
or connection fails.
- Defective installation of the mirroring kit
- Breakdown of the HDD of the mirroring kit
- Defective connection between the HDD and the
machine or the HDD of the mirroring kit breaks down
or connection fails.
- Defective installation of the mirroring kit
- Breakdown of the HDD of the mirroring kit
- Defective connection between the HDD and the
mirroring kit harness
- MFP PWB trouble
Check & Remedy
- Use SIM62-20 to check the trouble.
- Check installation of the mirroring kit (connector and
- Check installation of the mirroring kit (connector and
harness), and replace if necessary.
- Replace the broken HDD.
- Replace the mirroring kit.
- Replace the MFP PWB.
- Replace the mirroring kit.
- Replace the MFP PWB.
Trouble content
Detail
MFP
Cause
Connector, harness connection trouble in the MFPC
PWB and HDD.
HDD (error file management area) data abnormality
(FAT breakage).
MFPC PWB trouble.
PWB and HDD.
HDD (error file management area) data abnormality
(FAT breakage).
MFPC PWB trouble.
Check & Remedy
Check connection of the connector and the harness of
the MFPC PWB and HDD.
Use SIM62-2, 3 to check read/write operations of the
HDD.
Replace the HDD.
Check or replace the MFPC PWB.
the MFPC PWB and HDD.
Use SIM62-2, 3 to check read/write operations of the
HDD.
Replace the HDD.
Check or replace the MFPC PWB.
Cause
(When the
mirroring kit is
not installed)
RAID PWB trouble.
A HDD which has been used for mirroring is installed.
Both HDD's go into trouble under the use environment
of mirroring.
A HDD which has been used for mirroring is installed.
Both HDD's go into trouble under the use environment
of mirroring.
Check & Remedy
(When the
mirroring kit is
installed)
Check the RAID PWB, and replace if necessary.
Replace the HDD.
(For details, refer to the HDD and RAID PWB
replacement procedures under mirroring
environment.)
Replace the HDD.
(For details, refer to the HDD and RAID PWB
replacement procedures under mirroring
environment.)
Trouble content
Detail
MFP
Cause
Connector, harness connection trouble in the MFPC
PWB and HDD.
HDD (error file management area) data abnormality
(FAT breakage).
MFPC PWB trouble.
PWB and HDD.
HDD (error file management area) data abnormality
(FAT breakage).
MFPC PWB trouble.
Check & Remedy
Check connection of the connector and the harness of
the MFPC PWB and HDD.
Use SIM62-2, 3 to check read/write operations of the
HDD.
Replace the HDD.
Check or replace the MFPC PWB.
the MFPC PWB and HDD.
Use SIM62-2, 3 to check read/write operations of the
HDD.
Replace the HDD.
Check or replace the MFPC PWB.
Cause
(When the
mirroring kit is
installed)
RAID PWB trouble.
A HDD which has been used for mirroring is installed.
Both HDD's go into trouble under the use environment
of mirroring.
A HDD which has been used for mirroring is installed.
Both HDD's go into trouble under the use environment
of mirroring.
Check & Remedy
(When the
mirroring kit is
installed)
Check the RAID PWB, and replace if necessary.
Replace the HDD.
(For details, refer to the HDD and RAID PWB
replacement procedures under mirroring
environment.)
Replace the HDD.
(For details, refer to the HDD and RAID PWB
replacement procedures under mirroring
environment.)
Trouble content
Detail
MFP
Cause
HDD-ASIC trouble. (MFPC PWB trouble.)
An error occurs in the HDD-ASIC self test when
booting.
An error occurs in the HDD-ASIC self test when
booting.
Check & Remedy
Check or replace the MFPC PWB.
Trouble content
Detail
MFP
Cause
SD card trouble or contact error
MFPC PWB trouble.
MFPC PWB trouble.
Check & Remedy
Replace the SD card.
Check the SD card socket.
Replace the MFPC PWB.
Check the SD card socket.
Replace the MFPC PWB.
Trouble content
Detail
SCU
Cause
Abnormality in the CCD black scan level when the
scanner lamp is turned OFF.
Improper installation of the harness to the CCD unit.
CCD unit abnormality.
SCU PWB abnormality.
scanner lamp is turned OFF.
Improper installation of the harness to the CCD unit.
CCD unit abnormality.
SCU PWB abnormality.
Check & Remedy
Check connection of the harness to the CCD unit.
Check the CCD unit.
Check the SCU PWB.
Check the CCD unit.
Check the SCU PWB.
Trouble content
Detail
SCU
Cause
Abnormality in the CCD white reference plate scan
level when the scanner lamp is turned ON.
Improper installation of the harness to the CCD unit.
Dirt on the mirror, lens, and the reference white plate.
Scanner lamp lighting trouble.
Scanner lamp drive PWB trouble
CCD unit abnormality.
SCU PWB abnormality.
level when the scanner lamp is turned ON.
Improper installation of the harness to the CCD unit.
Dirt on the mirror, lens, and the reference white plate.
Scanner lamp lighting trouble.
Scanner lamp drive PWB trouble
CCD unit abnormality.
SCU PWB abnormality.
Check & Remedy
Check connection of the harness to the CCD unit.
Check connection of the harness to the scanner lamp
unit.
Check or replace the scanner lamp.
Check or replace the scanner lamp drive PWB.
Clean or replace the mirror, the lens, and the
reference white board.
Check or replace the CCD unit.
Check or replace the SCU PWB.
Check connection of the harness to the scanner lamp
unit.
Check or replace the scanner lamp.
Check or replace the scanner lamp drive PWB.
Clean or replace the mirror, the lens, and the
reference white board.
Check or replace the CCD unit.
Check or replace the SCU PWB.
Trouble content
Detail
SCU
Cause
SCU PWB trouble.
Check & Remedy
Check the SCU PWB.
Replace the SCU PWB.
Replace the SCU PWB.
MX-7500N TROUBLESHOOTING 7 – 16
E7-20
LSU laser detection and deterioration
error (K)
error (K)
E7-21
LSU laser deterioration error (C)
E7-22
LSU laser deterioration error (M)
E7-23
LSU laser deterioration error (Y)
E7-24
LSU LD driver trouble (K)
E7-25
LSU LD driver trouble (C)
E7-26
LSU LD driver trouble (M)
E7-27
LSU LD driver trouble (Y)
E7-28
LSU - PCU connection error
E7-29
LSU ASIC frequency error
Trouble content
Detail
PCU
Cause
Laser optical axis misalignment
Reduced laser power, lighting error, laser diode
trouble.
LSU harness, connector trouble
LSU BD PWB/LD PWB/LSU control PWB trouble.
Reduced laser power, lighting error, laser diode
trouble.
LSU harness, connector trouble
LSU BD PWB/LD PWB/LSU control PWB trouble.
Check & Remedy
Use SIM61-1 to check the operation of the LSU.
Check or replace the LSU control PWB.
Check connection of the LSU harness.
Replace the LSU.
Check or replace the LSU control PWB.
Check connection of the LSU harness.
Replace the LSU.
Trouble content
Detail
PCU
Cause
Reduced laser power, lighting error, laser diode
trouble.
LSU connector trouble
LD PWB/LSU control PWB trouble.
trouble.
LSU connector trouble
LD PWB/LSU control PWB trouble.
Check & Remedy
Use SIM61-1 to check the operation of the LSU.
Check or replace the LSU control PWB.
Check connection of the LSU harness and connector.
Replace the LSU.
Check or replace the LSU control PWB.
Check connection of the LSU harness and connector.
Replace the LSU.
Trouble content
Detail
PCU
Cause
Reduced laser power, lighting error, laser diode
trouble.
LSU connector trouble
LSU LD PWB/LSU control PWB trouble.
trouble.
LSU connector trouble
LSU LD PWB/LSU control PWB trouble.
Check & Remedy
Use SIM61-1 to check the operation of the LSU.
Check or replace the LSU control PWB.
Check connection of the LSU connector.
Replace the LSU.
Check or replace the LSU control PWB.
Check connection of the LSU connector.
Replace the LSU.
Trouble content
Detail
PCU
Cause
Reduced laser power, lighting error, laser diode
trouble.
LSU connector trouble
LD PWB/LSU control PWB trouble.
trouble.
LSU connector trouble
LD PWB/LSU control PWB trouble.
Check & Remedy
Use SIM61-1 to check the operation of the LSU.
Check or replace the LSU control PWB.
Check connection of the LSU connector.
Replace the LSU.
Check or replace the LSU control PWB.
Check connection of the LSU connector.
Replace the LSU.
Trouble content
The LSU LD is lighted, the initialization process of the
LD driver is not performed normally.
LD driver is not performed normally.
Detail
PCU
Cause
Reduced laser power, lighting error, laser diode
trouble.
LSU connector trouble.
LD PWB/LSU control PWB trouble.
trouble.
LSU connector trouble.
LD PWB/LSU control PWB trouble.
Check & Remedy
Use SIM61-01 to check the operations of the LSU.
Check or replace the LSU control PWB.
Check connection of the LSU harness.
Replace the LSU.
Check connection of the LSU harness.
Replace the LSU.
Trouble content
The LSU LD is lighted, the initialization process of the
LD driver is not performed normally.
LD driver is not performed normally.
Detail
PCU
Cause
Reduced laser power, lighting error, laser diode
trouble.
LSU connector trouble.
LD PWB/LSU control PWB trouble.
trouble.
LSU connector trouble.
LD PWB/LSU control PWB trouble.
Check & Remedy
Use SIM61-01 to check the operations of the LSU.
Check or replace the LSU control PWB.
Check connection of the LSU harness.
Replace the LSU.
Trouble content
The LSU LD is lighted, the initialization process of the
LD driver is not performed normally.
LD driver is not performed normally.
Detail
PCU
Cause
Reduced laser power, lighting error, laser diode
trouble.
LSU connector trouble.
LD PWB/LSU control PWB trouble.
trouble.
LSU connector trouble.
LD PWB/LSU control PWB trouble.
Check & Remedy
Use SIM61-01 to check the operations of the LSU.
Check or replace the LSU control PWB.
Check connection of the LSU harness.
Replace the LSU.
Check connection of the LSU harness.
Replace the LSU.
Trouble content
The LSU LD is lighted, the initialization process of the
LD driver is not performed normally.
LD driver is not performed normally.
Detail
PCU
Cause
Reduced laser power, lighting error, laser diode
trouble.
LSU connector trouble.
LD PWB, LSU control PWB trouble.
trouble.
LSU connector trouble.
LD PWB, LSU control PWB trouble.
Check & Remedy
Use SIM61-01 to check the operations of the LSU.
Check or replace the LSU control PWB.
Check connection of the LSU harness.
Replace the LSU.
Trouble content
Detail
PCU
Cause
Communication error between the CPU in the PCU
PWB and the LSU control ASIC.
Improper connection of the communication connector
between the PCU PWB and the LSU control PWB .
Harness trouble between the PCU PWB and the LSU
control PWB
PCU PWB trouble.
LSU control PWB trouble.
LSU trouble.
PWB and the LSU control ASIC.
Improper connection of the communication connector
between the PCU PWB and the LSU control PWB .
Harness trouble between the PCU PWB and the LSU
control PWB
PCU PWB trouble.
LSU control PWB trouble.
LSU trouble.
Check & Remedy
Check connection of the connector and the harness
between the PCU PWB and the LSU control PWB.
Replace the LSU control PWB.
Replace the PCU PWB.
Replace the LSU.
between the PCU PWB and the LSU control PWB.
Replace the LSU control PWB.
Replace the PCU PWB.
Replace the LSU.
Trouble content
Detail
PCU
Cause
Oscillation abnormality of the external oscillator used
in the LSU ASIC.
LSU ASIC abnormality on the LSU control PWB.
in the LSU ASIC.
LSU ASIC abnormality on the LSU control PWB.
Check & Remedy
Replace the LSU control PWB.
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