DOWNLOAD Sharp AL-840 (serv.man9) Service Manual ↓ Size: 6.35 MB | Pages: 27 in PDF or view online for FREE

Model
AL-840 (serv.man9)
Pages
27
Size
6.35 MB
Type
PDF
Document
Service Manual
Brand
Device
Copying Equipment / AL800 840 Service Manual-Troubleshooting
File
al-840-sm9.pdf
Date
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SELF DIAG CODE MESSAGE
U2
No
C13
PHENOMENON
DISPLAY
CODE
MAIN CODE
U2
SUB CODE
04
LAMP
TITLE
EEPROM (MCU PWB) trouble (read/write error)
DETAIL
EEPROM (MCU PWB) read/write operation trouble
SECTION
MCU PWB
EEPROM
ITEM
TYPE (MODE)
User
Warning
Service
YES
Trouble
YES
Other
Other
OPERATION MODE
All modes
Machine operation when the
message is displayed
Stop
NOTE
BASIC CAUSE 1
EEPROM (MCU PWB) read/write operation trouble
CASE 1
No
TROUBLE POSITION
CAUSE
EEPROM (MCU PWB) read/write operation trouble
EEPROM (MCU PWB) trouble
REMEDY
(Check)
(Remedy)
1) MCU PWB replacement
2) Reset the trouble with SIM 14.
3) Use simulations to set various set values and adjustment values.
(After work)
NOTE
SELF DIAG CODE MESSAGE
U2
No
C14
PHENOMENON
DISPLAY
CODE
MAIN CODE
U2
SUB CODE
05
LAMP
TITLE
EPROM (MCU PWB) trouble
DETAIL
EPROM (MCU PWB) data error
SECTION
MCU PWB
EPROM
ITEM
TYPE (MODE)
User
Warning
Service
YES
Trouble
YES
Other
Other
OPERATION MODE
All modes
Machine operation when the
message is displayed
Stop
NOTE
BASIC CAUSE 1
EPROM (MCU PWB) data error
CASE 1
No
TROUBLE POSITION
CAUSE
EPROM (MCU PWB) data error
EPROM (MCU PWB) trouble
REMEDY
(Check)
(Remedy)
1) MCU PWB replacement
2) Reset the trouble with SIM 14.
3) Use simulations to set various set values and adjustment values. 
(After work)
NOTE
10 – 13
SELF DIAG CODE MESSAGE
U2
No
C15
PHENOMENON
DISPLAY
CODE
MAIN CODE
U2
SUB CODE
06
LAMP
TITLE
RAM (MCU PWB) trouble (read/write error)
DETAIL
RAM (MCU PWB) read/write operation trouble
SECTION
MCU PWB
RAM
ITEM
TYPE (MODE)
User
Warning
Service
YES
Trouble
YES
Other
Other
OPERATION MODE
All modes
Machine operation when the
message is displayed
Stop
NOTE
BASIC CAUSE 1
RAM (MCU PWB) read/write operation trouble
CASE 1
No
TROUBLE POSITION
CAUSE
RAM (MCU PWB) read/write operation trouble
RAM (MCU PWB) trouble
REMEDY
(Check)
(Remedy)
1) MCU PWB replacement
2) Reset the trouble with SIM 14.
3) Use simulations to set various set values and adjustment values.
(After work)
NOTE
SELF DIAG CODE MESSAGE
C1
No
C16
PHENOMENON
DISPLAY
CODE
MAIN CODE
CH
SUB CODE
LAMP
"CH" ON
TITLE
Cabinet open/close detection switch trouble
DETAIL
1) Cabinet (operation unit) open/close detection switch malfunction
2) Cabinet (operation unit) open/close detection switch signal is not recognized.
SECTION
Power PWB unit
ITEM
TYPE (MODE)
User
YES
Warning
YES
Service
YES
Trouble
YES
Other
Other
OPERATION MODE
All modes
Machine operation when the
message is displayed
Stop
NOTE
BASIC CAUSE 1
Cabinet (operation unit) open/close detection switch signal is not recognized.
CASE 1
No
TROUBLE POSITION
CAUSE
Cabinet (operation unit) open/close detection switch signal recognition error
1) Cabinet (operation unit) open/close detection switch trouble
2) MCU PWB cabinet (operation unit) open/close detection switch signal input circuit trouble
REMEDY
(Check)
1) Cabinet (operation unit) open/close detection switch
2) MCU PWB cabinet (operation unit) open/close detection switch signal input circuit
(Remedy)
1) Cabinet (operation unit) open/close detection switch replacement
2) MCU PWB replacement
3) Power PWB replacement
(After work)
1) When the MCU PWB is replaced, perform simulations to input various set values and
adjustment values.
NOTE
10 – 14
No
C16
CASE 2
No
TROUBLE POSITION
CAUSE
Cabinet (operation unit) open/close detection switch actuator does not operate while the cabinet is
opened/closed.
1) Cabinet (operation unit) open/close trouble
REMEDY
(Check)
1) Cabinet (Operation unit)
(Remedy)
1) Cabinet (operation unit) replacement
(After work)
NOTE
SELF DIAG CODE MESSAGE
CH
No
C17
PHENOMENON
DISPLAY
CODE
MAIN CODE
CH
SUB CODE
LAMP
"CH" blink
TITLE
Developer cartridge detection trouble
DETAIL
1) Toner density sensor malfunction 
2) Toner density sensor signal recognition error
SECTION
Developer cartridge
ITEM
TYPE (MODE)
User
YES
Warning
YES
Service
YES
Trouble
YES
Other
Other
OPERATION MODE
All modes
Machine operation when the
message is displayed
Stop
NOTE
BASIC CAUSE 1
Toner density sensor signal level recognition error
CASE 1
No
TROUBLE POSITION
CAUSE
Toner density sensor signal recognition error
1) Toner density sensor trouble
2) Toner density sensor signal input circuit trouble
REMEDY
(Check)
1) Toner density sensor
2) Toner density sensor signal input circuit 
(Remedy)
1) Toner density sensor replacement
2) PCU PWB Replacement
(After work)
1) When the MCU PWB is replaced, perform simulations to input various set values and
adjustment values.
NOTE
SELF DIAG CODE MESSAGE
E1
No
C18
PHENOMENON
DISPLAY
CODE
MAIN CODE
P
SUB CODE
LAMP
"P" blink
TITLE
Paper misfeed
DETAIL
1) Paper entry detection (PIN) malfunction 
2) Paper entry detector (PIN) signal recognition error
3) Paper feed roller abnormal rotation
SECTION
Fusing, paper exit
ITEM
TYPE (MODE)
User
YES
Warning
YES
Service
YES
Trouble
YES
Other
Other
OPERATION MODE
All modes
Machine operation when the
message is displayed
Stop
NOTE
BASIC CAUSE 1
1) Paper entry detector (PIN) signal recognition error
2) Paper feed roller does not feed paper.
10 – 15
No
C18
CASE 1
No
TROUBLE POSITION
CAUSE
Paper entry detector (PIN) signal recognition error
1) Paper entry (PIN) trouble
2) Paper entry detector (PIN) signal input circuit trouble
REMEDY
(Check)
1) Paper entry detector (PIN)
2) MCU PWB paper entry detector (PIN) signal input circuit
(Remedy)
1) Paper entry detector (PIN) replacement
2) MCU PWB replacement
(After work)
1) When the MCU PWB is replaced, perform simulations to input various set values and
adjustment values.
NOTE
CASE 2
No
TROUBLE POSITION
CAUSE
Paper feed roller does not feed paper normally.
1) Paper feed roller clutch drive circuit trouble
2) Paper feed roller clutch trouble
3) Paper feed roller trouble
4) Paper separation sheet trouble
REMEDY
(Check)
1) MCU PWB paper feed roller clutch drive circuit
2) Paper feed roller clutch 
3) Paper feed roller
4) Paper separation sheet
(Remedy)
1) MCU PWB replacement
2) Paper feed roller clutch replacement
3) Paper feed roller replacement
4) Paper separation sheet replacement
(After work)
NOTE
SELF DIAG CODE MESSAGE
E2
No
C19
PHENOMENON
DISPLAY
CODE
MAIN CODE
SUB CODE
LAMP
Paper jam lamp blinking
TITLE
Paper jam (paper entry section)
DETAIL
1) Paper entry detector (PIN) malfunction
2) Paper entry detector (PIN) signal recognition error
SECTION
Paper entry, transfer
ITEM
TYPE (MODE)
User
YES
Warning
YES
Service
YES
Trouble
YES
Other
Other
OPERATION MODE
All modes
Machine operation when the
message is displayed
Stop
NOTE
BASIC CAUSE 1
Paper entry detector (PIN) signal recognition error
CASE 1
No
TROUBLE POSITION
CAUSE
Paper entry detector (PIN) signal recognition error
1) Paper entry detector (PIN) trouble
2) Paper entry detector (PIN) signal input circuit trouble
REMEDY
(Check)
1) Paper entry detector (PIN)
2) MCU PWB paper entry detector (PIN) signal input circuit
(Remedy)
1) Paper entry detector (PIN) replacement
2) MCU PWB replacement
(After work)
1) When the MCU PWB is replaced, perform simulations to input various set values and
adjustment values.
NOTE
10 – 16
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