Sharp AM-300 (serv.man7) Service Manual ▷ View online
AM-300DE
3 – 2
4. Paper path
5. Components layout
CIS
Document input
Envelope
Document exit
Fusing unit
Optical unit (LSU)
Drum cartridge
Toner cartridge
Paper(250 sheets)
Print exit
Fig. 4
4
1
8
2
11
9
10
7
6
3
5
12
13
Fig. 5
No.
PARTS NAME
No.
PARTS NAME
1
Feed roller
8
Drum cartridge
2
Transfer roller
9
Optical unit (LSU)
3
Transfer pinch roller
10
Fusing unit
4
CIS
11
Document feeder tray
5
Output tray
12
Exit roller
6
PU roller assay
13
Exit pinch roller
7
Toner cartridge
AM-300DE
3 – 3
6. Switch/Sensor layout
9
2
10
8
7
11
14
12
13
3
4
5
6
1
Fig. 6
No.
PARTS NAME
TYPE
DESCRIPTION
1
Front sensor
Microcircuit
When the document is set up in the hopper, the front sensor is on.
2
ORG sensor
Microcircuit
When the ORG sensor is on, the document is fed and scanning will be
started.
started.
3
P-IN sensor
Microcircuit
When this switch is turned on, paper transport.
4
Bypass PE sensor
Microcircuit
When this switch is turned on, paper transport.
5
Inter lock switch
Microcircuit
Detects the opening or closing of the Right Cover.
6
PO2 sensor
Microcircuit
Detects when the paper is fed out.
7
Roller switch
Microcircuit
Detects when the Pickup Roller is home position.
8
Toner sensor
Microcircuit
Detects when the Toner Cartridge is set.
9
Home position sensor
Microcircuit
Detects when CIS is ADF scanning position.
10
Tray cover sensor
Microcircuit
Detects when the Paper Tray is set up.
11
PO1 sensor
Photo transistor
Detects when the paper is fed out.
12
Temperature fuse 216
°C
Thermal fuse
When the heat roller temperature rises abnormally, this fuse cuts off the
power relay power line (+24 V line).
power relay power line (+24 V line).
13
Temperature fuse 152
°C
Thermal fuse
When the heat roller temperature rises abnormally, this fuse cuts off the
heater lamp power line.
heater lamp power line.
14
Thermistor
Thermistor
Detects the temperature on the heat roller.
AM-300DE
3 – 4
7. Scanner drive block and diagram
7.1. Overall layout
7.2. Gear layout
Drive switching unit
A
Pin
System gear
Gear
Hold lever
Hold rib
Scanner unit
Home position sensor
Lever
(drive source)
Motor gear
Scan unit drive side gear train
Sheet scan drive side gear train
Drive belt
Scan unit locking lever
System gear
Planet gear A
Planet gear B
System gear biasing spring
AM-300DE
3 – 5
7.3. Fixed scan mode
7.4. Sheet scan mode
Scan unit drive side gear train
Sheet scan drive side gear train
Scan unit locking lever
System gear
Planet gear A
Planet gear B
System gear biasing spring
(drive source)
Motor gear
Counterclockwise rotation: The scanner unit
moves toward the sheet scan position.
moves toward the sheet scan position.
(Clockwise rotation: The scanner unit
moves toward the fixed scan position.)
moves toward the fixed scan position.)
(Scanner unit)
Locking rib
Counterclockwise rotation: Sheets
are fed to the sheet scan section.
are fed to the sheet scan section.
System gear biasing spring
Scan unit drive side gear train
Sheet scan drive side gear train
Scan unit locking lever
System gear
Planet gear A
Planet gear B
(drive source)
Motor gear