Sharp FO 4400 - B/W Laser - All-in-One, Руководство по обслуживанию

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FO-4400U
FO-CS1
3 – 3
3. PRINTER ENGINE ELECTRICAL COMPONENTS LAYOUT
Fig. 3
H1
PS3
TH1
TS1
M2
M1
PWB-B
PWB-A
PWB-G
PWB-D
PS1
PS5A
PS5B
SL1
S2
HV1
PS4
PE1
M3
Symbol Name Function
PWB-A Printer PWB unit Communicates with the control PWB and controls all printer operation.
PWB-B Power Supply PWB unit Converts the power voltage from AC voltage into DC voltage and supplies that to H1.
PWB-D Laser Diode Drive PWB unit Detects the start point of printing via the laser diodes and SOS sensor, and illuminates the PC Drum with
(Inside of the Print Head Unit) the laser beam according to the image signals.
PWB-G Toner Empty PWB unit Toner quantity is read by the analog signal. (Use of LED)
M1 Main Motor Provides the drive source for the printer.
M3 Polygon Motor A regular heptagon mirror is installed, and rotates at high speed and makes the laser scan in scanning
(Inside of the Print Head Unit) direction.
M2 Cooling Fan Motor Exhausts heat from the body.
H1 Heater Lamp A halogen lamp that supplies heat to the Fusing Rollers. (600 W)
HV1 High Voltage PWB unit Supplies power to the following sections:
- Drum Charge Brush: Charged voltage
- Developing Sleeve Roller: Developing bias voltage
- Developing Toner Regulation Plate:
Developing blade voltage
- Developing Toner Collecting Plate: Developing Lower Seal voltage
- Image Transfer Roller: Image transfer voltage
PE1 Paper Empty Sensor Detects that a sheet of paper is taken up. The signal is L when paper is detected.
PS1 Paper Take-Up Sensor Detects that a sheet of paper is taken up. The signal is H when paper is detected.
PS3 Paper Exit Sensor Detects when the paper is fed out. The signal is H when the paper is detected.
PS4 Paper Out Sensor Paper out detection signal. The signal L when the paper is detected.
PS5A Received Docuent Tray Sensor The signal is L when there is a tray cover.
PS5B Paper Size Sensor Detects the size of the paper. Letter: signal H, Legal: signal L.
S2 Interlock Switch Detects the opening or closing of the Top Cover. Cuts output voltage (except 5 VDC) when the Top Cover
is open.
SL1 Paper Take-Up Solenoid Transmits the drive of the Main Motor to the Paper Take-up Roller.
TH1 Thermistor Detects the temperature of the Heat Roller, measures the temperature on the surface of the Heat Roller
and sends to the Heater control circuit.
TS1 Thermostat Cuts power to the Heater Lamp (H1) when overheating (215ºC) is detected at the Fusing Section.
4. ELECTRICAL PARTS IDENTIFICATION