Read Sharp AR-C170 (serv.man28) Service Manual online
AR-C170M TROUBLESHOOTING 11 - 5
Main
code
code
Sub
code
Title
LED controller output trouble
(Black)
(Black)
E7
24
Display
Lamp/Message
Phenomenon Detail
When printing, the print end
signal for each page is not
properly provided.
signal for each page is not
properly provided.
Section
LED/ICU PWB
Case 1
Cause
Disconnection of the LED
head connector.
head connector.
Check &
Remedy
Remedy
Check connection of the
LED head connector.
LED head connector.
Case 2
Cause
Disconnection of the
harness inside the LED
head.
harness inside the LED
head.
Check &
Remedy
Remedy
Replace the LED head unit.
Case 3
Cause
ICU PWB abnormality
Check &
Remedy
Remedy
Replace the ICU PWB.
Main
code
code
Sub
code
Title
LED controller output trouble
(Cyan)
(Cyan)
E7
25
Display
Lamp/Message
Phenomenon Detail
When printing, the print end
signal for each page is not
properly provided.
signal for each page is not
properly provided.
Section
LED/ICU PWB
Case 1
Cause
Disconnection of the LED
head connector.
head connector.
Check &
Remedy
Remedy
Check connection of the
LED head connector.
LED head connector.
Case 2
Cause
Disconnection of the
harness inside the LED
head.
harness inside the LED
head.
Check &
Remedy
Remedy
Replace the LED head unit.
Case 3
Cause
ICU PWB abnormality
Check &
Remedy
Remedy
Replace the ICU PWB.
Main
code
code
Sub
code
Title
LED controller output trouble
(Magenta)
(Magenta)
E7
26
Display
Lamp/Message
Phenomenon Detail
When printing, the print end
signal for each page is not
properly provided.
signal for each page is not
properly provided.
Section
LED/ICU PWB
Case 1
Cause
Disconnection of the LED
head connector.
head connector.
Check &
Remedy
Remedy
Check connection of the
LED head connector.
LED head connector.
Case 2
Cause
Disconnection of the
harness inside the LED
head.
harness inside the LED
head.
Check &
Remedy
Remedy
Replace the LED head unit.
Case 3
Cause
ICU PWB abnormality
Check &
Remedy
Remedy
Replace the ICU PWB.
Main
code
code
Sub
code
Title
LED controller output trouble
(Yellow)
(Yellow)
E7
27
Display
Lamp/Message
Phenomenon Detail
When printing, the print end
signal for each page is not
properly provided.
signal for each page is not
properly provided.
Section
LED/ICU PWB
Case 1
Cause
Disconnection of the LED
head connector
head connector
Check &
Remedy
Remedy
Check connection of the
LED head connector.
LED head connector.
Case 2
Cause
Disconnection of the
harness inside the LED
head.
harness inside the LED
head.
Check &
Remedy
Remedy
Replace the LED head unit
Case 3
Cause
ICU PWB abnormality
Check &
Remedy
Remedy
Replace the ICU PWB.
Main
code
code
Sub
code
Title
LED control ASIC connection
abnormality
abnormality
E7
28
Display
Lamp/Message
Phenomenon Detail
Access error between the
PCU PWB CPU and the
LED control ASIC
PCU PWB CPU and the
LED control ASIC
Section
ICU/PCU PWB
Case 1
Cause
Disconnection of the ICU/
PCU PWB communication
connector
PCU PWB communication
connector
Check &
Remedy
Remedy
Check connection of the
ICU/PCU PWB
communication connector
ICU/PCU PWB
communication connector
Case 2
Cause
ICU/PCU PWB
communication harness
trouble.
communication harness
trouble.
Check &
Remedy
Remedy
Check the ICU/PCU PWB
communication harness.
communication harness.
Case 3
Cause
ICU PWB/PCU PWB
trouble
trouble
Check &
Remedy
Remedy
Check grounding of the
machine. Replace the ICU
PWB or the PCU PWB.
machine. Replace the ICU
PWB or the PCU PWB.
Main
code
code
Sub
code
Title
Color correction data write
abnormality
abnormality
E7
40
Display
Lamp/Message
Phenomenon Detail
Data write error to the
Nand-Flash for holding
color correction data
Nand-Flash for holding
color correction data
Section
MFP PWB
Case 1
Cause
Color correction data
rewrite error
rewrite error
Check &
Remedy
Remedy
Perform rewriting of color
correction data again.
correction data again.
Case 2
Cause
MFP PWB trouble
Check &
Remedy
Remedy
Replace the MFP PWB.
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