AL-840 (serv.man9). AL800 840 Service Manual-Troubleshooting - Sharp Copying Equipment Service Manual (repair manual). Page 2

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(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
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Display

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