Sharp FACSIMILE FO-4500 Service Manual page 61

3. PRINTER ENGINE ELECTRICAL COMPONENTS LAYOUT
PWB-E
4. ELECTRICAL PARTS IDENTIFICATION
Symbol Name
PWB-A Printer Control PWB
PWB-D Laser Diode Drive
PWB-E Power Supply PWB
PWB-F High Voltage PWB Unit
PWB-R Resistor PWB
M1 Main Motor
M2 Polygon Motor
M3 Fan Motor
SL1 Paper Take-Up Solenoid
H1 Heater Lamp
TH1 Thermistor
S1 Power ON/OFF Switch
S2 Interlock Switch
S3 Thermostat
PC1 Paper Take-Up Sensor
PC3 Paper Exit Sensor
PWB-B 2nd Transport PWB
H1
TH1
S3
PC3
PC1
M1
S1
SL1
Communicates with the controller and controls all printer operation.
Detects the start position of the image by the Laser Diode and the SOS Sensor.
Converts the power voltage from AC voltage into DC voltage and supplies that to H1.
Applies each voltage respectively to the Rotating Charge Brush, the Sleeve Roller, the Toner
Regulation Plate, the Toner Collecting Plate and the Electrode Plate.
Prevents the image transfer current from flowing to paper by the resistor.
Is the drive source of the printer.
Rotates at high speed and makes the laser scan in scanning direction.
Exhausts the heated air out of the printer.
Transmits the drive of the Main Motor to the Paper Take-Up Roller.
A halogen lamp that supplies heat to the Upper and Lower Fusing Rollers.
Detects the temperature of the Upper Fusing Roller.
Turns ON or OFF the printer.
Detects the opening or closing of the Upper Unit.
Cuts off the current to H1 when blown.
Detects when paper is picked up and the paper size. The signal is L when the paper is detected.
Detects when the paper is fed out. The signal is L when the paper is detected.
Connects the printer and the Second Tray.
PWB-R
PWB-A
M3
S2
PWB-B
M2
PWB-D
Fig. 3
Function
3 – 4
PWB-F
FO-4500H