Read Sharp MX-6240N / MX-7040N (serv.man26) Service Manual online
MX-7040N TROUBLESHOOTING 7 – 13
C1-03
Charger cleaner trouble (C)
C1-05
Charger cleaner trouble (M)
C1-07
Charger cleaner trouble (Y)
C1-10
Main charger trouble (Monochrome)
C1-14
Main charger trouble (Color)
Trouble content
Detail
PCU
Cause
The main charger unit (C) is not installed properly.
There is an abnormality in the main charger unit (C).
Connector connection trouble of the drum unit (C) HP
sensor, the discharge lamp, or the after-transfer
discharge lamp.
Harness disconnection of the drum unit (C) HP
sensor, the discharge lamp, or the after-transfer
discharge lamp.
HP sensor dirt.
Charger cleaner motor (C) trouble.
PCU PWB connector connection trouble/PWB trouble.
There is an abnormality in the main charger unit (C).
Connector connection trouble of the drum unit (C) HP
sensor, the discharge lamp, or the after-transfer
discharge lamp.
Harness disconnection of the drum unit (C) HP
sensor, the discharge lamp, or the after-transfer
discharge lamp.
HP sensor dirt.
Charger cleaner motor (C) 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 (C) HP sensor, the discharge lamp, and the after-
transfer discharge lamp.
Check the harness of the drum unit (C) 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 (C).
cleaner.
Check disconnection of the main charger unit./
Replace.
Check for disconnection of the connector of the drum
unit (C) HP sensor, the discharge lamp, and the after-
transfer discharge lamp.
Check the harness of the drum unit (C) 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 (C).
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.
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