Sharp AL-800 (serv.man5) Service Manual ▷ View online
No.
Parts
Model
Note
14
PIN
SENSOR
SENSOR
PIN
Paper in detector
Photo
transmission
sensor
transmission
sensor
Detects whether the fed paper is
transported to the transfer
position or not. By the timing of
this detector signal, the relative
positions of the paper and the
print image are controlled.
transported to the transfer
position or not. By the timing of
this detector signal, the relative
positions of the paper and the
print image are controlled.
LOW (0V) when
paper is detected.
paper is detected.
15
Developing roller
Attaches toner to the latent
electrostatic images on the OPC
drum to convert them into visible
images.
electrostatic images on the OPC
drum to convert them into visible
images.
16
Transfer roller
Transfers toner images on the
OPC drum to paper.
OPC drum to paper.
17
Transfer pressure
spring
spring
Applies a pressure to the
transfer roller, paper, and the
OPC drum to improve transfer
efficiency.
transfer roller, paper, and the
OPC drum to improve transfer
efficiency.
18
Separation electrode
Reduces the paper charging
potential to facilitate separation
of paper from the OPC drum.
potential to facilitate separation
of paper from the OPC drum.
19
Temperature fuse 1
(fusing section)
(fusing section)
Mold
Assures safety in overheating.
20
Temperature fuse 2
(fusing section)
(fusing section)
Mold
Assures safety in overheating.
21
Pressure roller
Applies a pressure to the heat
roller and paper to improve
fusing efficiency.
roller and paper to improve
fusing efficiency.
22
Fusing pressure
spring
spring
Applies a pressure to the heat
roller paper, and the pressure
roller to improve transfer
efficiency.
roller paper, and the pressure
roller to improve transfer
efficiency.
23
Paper exit roller
Discharges paper after fusing.
24
POUT
POUT IN
Paper exit detector
Photo
transmission
sensor
transmission
sensor
Detects discharge of paper.
LOW (0V) when
paper is detected.
paper is detected.
25
HL
Heater lamp
Halogen lamp
Heats the heat roller.
100V series
100V 500W
120V series
120V 500W
200V series
230V 500W
26
Heat roller
Toner on the paper is heated
and fused onto the paper.
and fused onto the paper.
27
Separation pawl
Separates paper from the fusing
roller mechanically.
roller mechanically.
28
MHPS
MHPS
Scanner home
position sensor
position sensor
Photo
transmission
sensor
transmission
sensor
Detects the scanner home
position. By this signal the image
scanning operation is controlled.
position. By this signal the image
scanning operation is controlled.
HIGH (5V) when
the home position
is detected.
the home position
is detected.
29
No. 2 mirror
Leads document images to CCD
30
SL SENSOR
PDA/PDK
Scanner lamp light
quantity sensor
quantity sensor
Photo diode
Detects the scanner lamp light
quantity. This signal is inputted
to the scanner lamp control PWB
to control the scanner lamp drive
voltage to maintain a constant
level of light quantity.
quantity. This signal is inputted
to the scanner lamp control PWB
to control the scanner lamp drive
voltage to maintain a constant
level of light quantity.
HIGH (5V) when
the home position
is detected.
the home position
is detected.
31
Scanner lamp
Radiates light necessary for the
CCD to scan the document
images.
CCD to scan the document
images.
32
Lens
Transfers document images to
CCD.
CCD.
33
CCD
SENSOR
SENSOR
CCD OUT
CCD (image) sensor
CCD
Scans the document images
(photo signals) and converts
them into electrical signals.
(photo signals) and converts
them into electrical signals.
Digital signal (8Bit)
34
No. 1 mirror
Lead document images to CCD.
35
No. 3 mirror
Lead document images to CCD.
36
Paper separater
spring
spring
Applies a proper pressure to the
paper separater
paper separater
5 – 13
C. Functional parts
(1) Sensor, detector
No.
Parts
Note
Code
Signal name
Name
Type
Function/operation
Active condition
1
MHPS
MHPS
Scanner home position
sensor
sensor
Photo
transmission
sensor
transmission
sensor
Detects the scanner home position.
This signal is used to control image
scanning operation.
This signal is used to control image
scanning operation.
HIGH (5V) when the
home position is
detected.
home position is
detected.
2
SL SENSOR
PDA/PDK
Scanner lamp light
quantity sensor
quantity sensor
Photo diode
Detects the scanner lamp light
quantity. This signal is inputted to
the scanner lamp control PWB to
control the scanner lamp drive
voltage to maintain a constant level
of light quantity.
quantity. This signal is inputted to
the scanner lamp control PWB to
control the scanner lamp drive
voltage to maintain a constant level
of light quantity.
Analog signal (0
∼
0.5V)
3
PAPER SIZE
SW
SW
PAPER SIZE
IN
IN
Paper width detector
Mechanical
switch (Micro
switch)
switch (Micro
switch)
Detects the paper width. This signal
is used to control the laser beam
radiation area.
is used to control the laser beam
radiation area.
LOW (0V) when the
max. width is detected.
max. width is detected.
4
PE SENSOR
PEMP IN
Paper empty detector
Photo
transmission
sensor
transmission
sensor
Detects paper on the paper tray.
LOW (0V) when paper
is detected.
is detected.
5
SYNC
SYNC IN
Laser beam sensor
Bin diode
Detects the laser beam position.
This signal is used to control the left
image print start position.
This signal is used to control the left
image print start position.
LOW (0V) when laser
beam is detected.
beam is detected.
6
CCD SENSOR
CCD OUT
CCD (image) sensor
CCD
Scans document images (photo
signals) and converts them into
electrical signals.
signals) and converts them into
electrical signals.
Digital signal (8Bit)
7
PIN SENSOR
PIN
Paper in detector
Photo
transmission
sensor
transmission
sensor
Detects whether the fed paper is
transported to the transfer position or
not.
transported to the transfer position or
not.
LOW (0V) when paper
is detected.
is detected.
8
TS
TS IN
Toner empty sensor
Photo
transmission
sensor
transmission
sensor
Detects remaining toner in the
developing cartridge.
developing cartridge.
HIGH (5V) when toner
empty is detected.
empty is detected.
9
RTH
RTH IN
Fusing temperature
sensor
sensor
Thermistor
Detects the fusing roller surface
temperature.
temperature.
Analog signal (2.0
∼
5.0V)
10
POUT
POUT IN
Paper exit detector
Photo
transmission
sensor
transmission
sensor
Detects discharge of paper.
LOW (0V) when paper
is detected.
is detected.
11
DSW
DSW
Front cover open/close
switch
switch
Micro switch
Turns on/off the
+
24V power line
(power source for the motor, the high
voltage PWB, and solenoids) when
opening/closing the front cover for
safety. (Detects open/close of the
front cover at the same time.)
voltage PWB, and solenoids) when
opening/closing the front cover for
safety. (Detects open/close of the
front cover at the same time.)
Close
8) TS
9) RTH
10) POUT
11) DSW
1) MHPS
2) SL SENSOR
7) PIN SENSOR
6) CCD SENSOR
3) PAPER SIZE SW
4) PE SENSOR
5) SYNC
5 – 14
(2) Switch
No.
Parts
Note
Code
Signal name
Name
Type
∗
Function/operation
Active condition
1
DSW
DSW
Front cover
open/close switch
open/close switch
Micro switch
Turns on/off the
+
24V power line (power
source for the motor, the high voltage
PWB, and solenoids) when
opening/closing the front cover for
safety. (Detects open/close of the front
cover at the same time.)
PWB, and solenoids) when
opening/closing the front cover for
safety. (Detects open/close of the front
cover at the same time.)
Close
2
POWER SW
Main power switch
Seesaw
switch
switch
Turns on/off the main power line.
(ON/OFF of all power)
(ON/OFF of all power)
Close
(3) Clutch, solenoid
No.
Parts
MODEL
Note
Code
Signal name
Name
Type
∗
Function/operation
Active
condition
1
PUS
PUS
Paper feed clutch
solenoid
solenoid
Solenoid
Controls ON/OFF of the paper feed
roller. (The paper feed roller is driven
by the paper feed clutch solenoid
and the main motor.)
roller. (The paper feed roller is driven
by the paper feed clutch solenoid
and the main motor.)
ON
Driven by
+
24V power.
2
Paper feed clutch
Mechanical
spring type clutch
spring type clutch
Controls ON/OFF of the paper feed
roller. (The paper feed roller is driven
by the paper feed clutch solenoid
and the main motor.)
roller. (The paper feed roller is driven
by the paper feed clutch solenoid
and the main motor.)
ON
1) DSW
2) POWER SW
1) PUS
2)
5 – 15
(4) Motor
a. Drive motor
No.
Parts
Note
Code
Name
Type
Function/operation
1
LSM
Laser scanning motor
DC brushless motor
(+24V)
(+24V)
Drives the scanning mirror.
2
MM
Main motor
Stepping motor (+24V)
Drives the paper feed section, the paper
transport section, and the image process
section.
transport section, and the image process
section.
3
IMGSM
Scanning motor
Stepping motor (+24V)
Drives the scanner (reading) unit.
b. Fan (motor)
No.
Parts
Note
Code
Name
Type
Function/operation
1
FM
Cooling fan motor
Propel (DC brushless
motor) (+24V)
motor) (+24V)
Cools inside the machine (the fusing
section and the image process section).
section and the image process section).
3) IMGSM
1) LSM
2) MM
1) FM
5 – 16
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