Sharp AL-2021 Service Manual ▷ View online
AL-2041 EXTERNAL VIEWS AND INTERNAL STRUCTURES 4 - 3
4. Indicators on the operation panel
The start (
) indicator indicates the state of the printer or scan-
ner.
Start indicator
Power save indicator
SCAN indicator
On:
Indicates the unit is ready for copying or scanning
is being performed.
is being performed.
Blinking:
The indicator blinks in the following situations:
• When a print job is interrupted.
• When reserving a copy job.
• When reserving a copy job.
• When toner is being replenished during a copy
or print job.
Off:
The indicator is off in the following situations:
• During copying or scanning.
• The unit is in the auto power shut-off mode.
• When a misfeed or error has occurred.
• When a misfeed or error has occurred.
• During print online.
On:
Indicates the unit is in a power save mode.
Blinking:
Indicates that the unit is initializing (when the side
cover is opened and closed or the power turned
off and on).
cover is opened and closed or the power turned
off and on).
On:
The SCAN (
) key has been pressed and the
unit is in scanner mode.
Blinking:
A scan job is being executed from the computer,
or scan data is stored in the unit's memory.
or scan data is stored in the unit's memory.
Off:
The unit is in the copy mode.
SCAN indicator
Start indicator
Power save
indicator
indicator
AL-2041 EXTERNAL VIEWS AND INTERNAL STRUCTURES 4 - 4
5. Motors and solenoids
9
2
8
4
1
5
3
6
7
No.
Name
Control signal
Function / Operation
1
Main motor
MM
Drives the copier.
2
Scanner motor
MRMT
Drives the optical mirror base (scanner unit).
3
Toner motor
TM
Supplies toner.
4
Cooling fan motor
VFM
Cools the optical, fusing section.
5
Resist roller solenoid
RRS
Resist roller rotation control solenoid
6
Paper feed solenoid
CPFS1
Cassette Paper feed solenoid 1
7
Multi paper feed solenoid
MPFS
Multi manual pages feed solenoid
8
SPF motor
SPFM
Drives the single pass feeder (AL-2031/2041)
9
Duplex motor
DMT
Devices the duplex paper transport section (AL-2041)
AL-2041 EXTERNAL VIEWS AND INTERNAL STRUCTURES 4 - 5
6. Sensors and switches
1
2
8
9
3
7
6
5
4
No.
Name
Signal
Type
Function / Operation
Output
1
Scanner unit home
position sensor
position sensor
MHPS
Transmission sensor
Scanner unit home position
detection
detection
"H" at home position
2
POD sensor
POD
Transmission sensor
Paper exit detection
"H" at paper pass
3
PPD2 sensor
PPD2
Transmission sensor
Paper transport detection 2
"L" at paper pass
4
Cassette detection switch
CED1
Micro-switch
Cassette installation detection
"H" at cassette insertion
5
PPD1 sensor
PPD1
Transmission sensor
Paper transport detection 1
"L" at paper pass
6
Door switch
DSW
Micro-switch
Door open/close detection
(safety switch for 24V)
(safety switch for 24V)
0V at door open
7
Drum reset switch
DRST
Micro-switch
New drum detection switch
Instantaneously "H" at insertion
of new drum
of new drum
8
SPF sensor
SPID/
SD SW
SD SW
Transmission sensor
Paper entry detection
Cover open/close detection
Cover open/close detection
"L" at paper pass (AL-2031/2041)
9
SPPD sensor
SPPD
Transmission sensor
Paper transport detection
"L" at paper pass (AL-2031/2041)
AL-2041 EXTERNAL VIEWS AND INTERNAL STRUCTURES 4 - 6
7. PWB unit
4
8
3
6
7
9
2
5
1
No.
Name
Function / Operation
1
Exposure lamp invertor PWB
Exposure lamp (CCFL) control
2
Main PWB (MCU)
Copier control
3
Operation PWB
Operation input/display
4
High voltage PWB
High voltage control
5
CCD sensor PWB
For image scanning
6
LSU motor PWB
For polygon motor drive
7
TCS PWB
For toner sensor control
8
LSU PWB
For laser control
9
Power PWB
AC power input, DC voltage control
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