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

Sharp AL-840 (serv.man9) Service Manual ▷ View online

[10] TROUBLESHOOTING
1. Self diag message and troubleshooting
A. Outline
When a trouble occurs in the machine or when the life of a con-
sumable part is approached or expired, the machine detects it by
itself and displays it on the display section or notifies the user and the
how allowing the user and the serviceman to take proper measures.
In case of a trouble, the occurrence of the trouble is notified and the
machine is stopped to minimize damages.
B. Function and propose
1) Assuring safety. (The machine is stopped simultaneously with
detection of a trouble.)
2) Minimizing the machine damages. (The machine is stopped simul-
taneously with detection of a trouble.)
3) The trouble content is displayed to identify the trouble position at
an early stage. (The precise repair work is allowed and the repair
efficiency is improved.)
4) Warning of near end of consumable part life allows arrangement
of the consumable part in advance. (Machine stop by exhaustion
of consumable part is avoided.)
C. Kinds of self diag messages
The self diag messages are classified as follows:
Group 1
User
Troubles and warnings which can be
recovered by the user. (Paper jam,
consumable part exhaustion, etc.)
Service
Troubles and warnings which can be
recovered only by the serviceman. (Motor
trouble, maintenance, etc.)
Other
Group 2
Warning
Warning to the user, and no direct relation
with machine troubles. (Consumable part
life preliminary warning, etc.)
Trouble
Machine troubles. The machine is stopped.
Other
D. Self diag operation 
(1) Self diag operation and flow of countermeasures
The machine is always watching its state.
When the machine detects a trouble, it stops the operation and dis-
plays a trouble message.
The warning message is made when a consumable part life is near
end or expired.
When a warning message is made, there are two cases: where the
machine and where the machine is not stopped.
Trouble and warning messages are made by LED and lamps, at the
display section, and the host’s display section.
The display form and the display position differ depending on the
machine specifications.
Trouble messages are cleared automatically after repairing them or
must be cleared by test commands.
Warning messages for consumable parts are automatically cleared
when the consumable part is supplied or must be cleared by the diag
and test commands.
NO
YES
The machine condition is
 monitored.
Content detection/
analysis
Trouble/Warning
Warning
Trouble
Operation stop
Content display
Trouble/Warning
Warning
Trouble
Investigation of trouble
cause.
Repair
Cancel of self diag
message (test command)
Reset
Standby
Is the consumable 
part life expired ?
Replace or supply the
consumable part.
10 – 1
(2) Status detection and display
Recognition of the machine status is made by each unit controller or
the machine’s controller according to the detection information of
sensors and detectors.
The machine status is also recognized by the control data (counter
data, etc.) of the controller itself.
The status data from the machine, the option and each unit are sent
to the host computer and displayed on the host computer’s display.
(The status data output request command is sent between each con-
trol unit and the host computer. According to the command, the status
data are sent to the unit which requests and the host computer.)
Machine
Display signal
Control unit
(Detection content analysis/Status display data output)
Command/Status
(Data signal)
Each unit
Control unit
(Detection content analysis/
Status display, data output)
Detection
signal
Sensors/Detectors
Detection
signal
Sensors/Detectors
Command/Status
(Data signal)
Display signal
Host computer
Display
(Status display)
(Status data output request command
is outputted to the machine.
The status data is displayed on the
machine display. Status display data
output)
Display/Lamp
(Status display)
E. List
Display (Code)
No
MAIN
CODE
SUB
CODE
Content (Title)
Section
Operation
mode
Reset method
NOTE
C1
L1
00
Scanner (reading) feed trouble
Scanner (reading)
Copy
SIM 14
C2
L3
00
Scanner (reading) return trouble
Scanner (reading)
Copy
SIM 14
C3
E7
03
Laser beam output trouble
Scanner (writing)
Copy, print
POWER OFF –
C4
E7
04
Shading correction (white level) trouble
Scanner (reading)
Copy
POWER OFF –
C5
E7
05
Shading correction (dark component)
trouble
Scanner (reading)
Copy
POWER OFF –
C6
E7
12
Shading correction (output level) trouble
Scanner (reading)
Copy
POWER OFF –
C7
E7
14
ASIC (MCU PWB) malfunction
MCU PWB
All modes
POWER OFF –
C8
E7
15
Copy lamp trouble
Scanner (reading)
Copy
POWER OFF –
C9
H2
00
Fusing temperature sensor (thermistor)
trouble
Fusing
Copy, print
SIM 14
C10
H3
00
Fusing high temperature trouble
Fusing
Copy, print
SIM 14
C11
H4
00
Fusing low temperature trouble
Fusing
Copy, print
SIM 14
C12
U2
01
EEPROM (MCU PWB) trouble (Counter
data error)
MCU PWB
All modes
SIM 16
C13
U2
04
EEPROM (MCU PWB) trouble (Read/write
error)
MCU PWB
All modes
SIM 16
C14
U2
05
EEPROM (MCU PWB) trouble
MCU PWB
All modes
SIM 16
C15
U2
06
RAM (MCU PWB) trouble (Read/write error)
MCU PWB
All modes
SIM 16
C16
C1
Cabinet open/close detection switch trouble
Power PWB
All modes
Reset when the
trouble is canceled.
"CH" ON
C17
CH
Developer cartridge detection trouble
Developer cartridge
All modes
Reset when the
trouble is canceled.
"CH" blink
C18
E1
Paper misfeed
Paper feed
Copy, print
Reset when the
trouble is canceled.
"P" blink
C19
E2
Paper jam (Paper entry section)
Transfer, paper feed
Copy, print
Reset when the
trouble is canceled.
"JAM"
blink
C20
E3
Paper jam (Fusing, paper exit section)
Fusing
Copy, print
Reset when the
trouble is canceled.
"JAM"
blink
C21
P
Paper empty
Paper feed
Copy, print
Reset when the
trouble is canceled.
"P" blink
10 – 2
F. Details
SELF DIAG CODE MESSAGE
L1
No
C1
PHENOMENON
DISPLAY
CODE
MAIN CODE
L1
SUB CODE
00
LAMP
TITLE
Scanner (reading) feed trouble 
DETAIL
1) The scanner (reading) feed operation is not performed.
2) The scanner (reading) feed operation is not recognized.
SECTION
Scanner (reading)
ITEM
Operation
Recognition error
TYPE (MODE)
User
Warning
Service
YES
Trouble
YES
Other
Other
OPERATION MODE
Copy
Machine operation when the
message is displayed
Stop
NOTE
BASIC CAUSE 1
Though the specified number (pulses) of the scanner (reading motor feed; motor forward rotation) signals are outputted, the
scanner home position sensor (MHP) OFF cannot be checked.
CASE 1
No
TROUBLE POSITION
CAUSE
The scanner (reading) mechanism operation is not smoothly made.
1) Scanner (reading) mechanism lock
2) Scanner (reading) mechanism wear
REMEDY
(Check)
1) Scanner (reading) drive section assembly
2) Scanner (reading) sliding section (rail, shaft)
(Remedy)
1) Grease up.
2) Scanner (reading) section parts replacement
3) Reset the trouble with SIM 14.
(After work)
1) Adjust when the scanner (reading) section parts are disassembled.
NOTE
CASE 2
No
TROUBLE POSITION
CAUSE
Scanner home position sensor (MHP) signal recognition error
1) Scanner home position sensor (MHP) trouble
2) MCU PWB scanner home position sensor (MHP) input circuit trouble
REMEDY
(Check)
1) Scanner home position sensor (MHP) 
2) MCU PWB scanner home position sensor (MHP) input circuit
(Remedy)
1) Scanner home position sensor (MHP) replacement
2) MCU PWB replacement
3) Rest the trouble with SIM 14. 
(After work)
1) When the MCU PWB is replaced, perform simulations to input various set values and
adjustment values.
NOTE
CASE 3
No
TROUBLE POSITION
CAUSE
Scanner (reading) motor drive trouble
1) Scanner (reading) motor trouble
2) MCU PWB scanner (reading) motor control circuit trouble
REMEDY
(Check)
1) Scanner (reading) motor
2) MCU PWB scanner (reading) motor control circuit trouble
(Remedy)
1) Scanner (reading) motor replacement
2) MCU PWB replacement
3) Reset the trouble with SIM 14.
(After work)
1) When the MCU PWB is replaced, perform simulations to input various set values and
adjustment values.
NOTE
10 – 3
SELF DIAG CODE MESSAGE
L3
No
C2
PHENOMENON
DISPLAY
CODE
MAIN CODE
L3
SUB CODE
00
LAMP
TITLE
Scanner (reading) return trouble
DETAIL
1) The scanner (reading) dose not return.
2) The scanner (reading) return completion is not recognized.
SECTION
Scanner (reading)
ITEM
TYPE (MODE)
User
Warning
Service
YES
Trouble
YES
Other
Other
OPERATION MODE
Copy
Machine operation when the
message is displayed
Stop
NOTE
BASIC CAUSE 1
Though the specified number (pulses) of the scanner (reading) motor return (motor reverse rotation) signal is outputted, the
scanner home position sensor (MHP) ON is not recognized.
CASE 1
No
TROUBLE POSITION
CAUSE
The scanner (reading) mechanism operation is not smooth.
1) Scanner (reading) mechanism lock
2) Scanner (reading) mechanism wear
REMEDY
(Check)
1) Scanner (reading) drive section assembly
2) Scanner (reading) sliding section 9rail, shaft)
(Remedy)
1) Grease up
2) Scanner (reading) section parts replacement
3) Rest the trouble with SIM 14.
(After work)
1) When the scanner (reading) section parts are disassembled, adjust. 
NOTE
CASE 2
No
TROUBLE POSITION
CAUSE
Scanner home position sensor (MHP) signal recognition error
1) Scanner home positions sensor (MHP) trouble
2) MCU PWB scanner home position sensor (MHP) input circuit trouble
REMEDY
(Check)
1) Scanner home position sensor (MHP)
2) MCU PWB scanner home position sensor (MHP) input circuit
(Remedy)
1) Scanner home position sensor (MHP) replacement
2) MCU PWB replacement
3) Reset the trouble with SIM 14.
(After work)
1) When the MCU PWB is replaced, perform simulations to input various set values and
adjustment values.
NOTE
CASE 3
No
TROUBLE POSITION
CAUSE
Scanner (reading) motor drive trouble
1) Scanner (reading) motor trouble
2) MCU PWB scanner (reading) motor control circuit trouble
REMEDY
(Check)
1) Scanner (reading) motor
2) MCU PWB scanner (reading) motor control circuit
(Remedy)
1) Scanner (reading) motor replacement
2) MCU PWB replacement
3) Reset the trouble with SIM 14
(After work)
1) When the MCU PWB is replaced, perform simulations to input various set values and
adjustment values.
NOTE
10 – 4
Page of 27
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Sharp AL-840 (serv.man9) Service Manual ▷ Download

  • DOWNLOAD Sharp AL-840 (serv.man9) Service Manual ↓ Size: 6.35 MB | Pages: 27 in PDF or view online for FREE
  • Here you can View online or download the Service Manual for the Sharp AL-840 (serv.man9) in PDF for free, which will help you to disassemble, recover, fix and repair Sharp AL-840 (serv.man9) Copying Equipment. Information contained in Sharp AL-840 (serv.man9) Service Manual (repair manual) includes:
  • Disassembly, troubleshooting, maintenance, adjustment, installation and setup instructions.
  • Schematics, Circuit, Wiring and Block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Exploded View and Parts List.