AR-C270 (serv.man6). (Section 5) External View Internal Structure - Sharp Copying Equipment Service Manual (repair manual). Page 7

No.

Parts

Note

Name

Function/Operation

1

Operation PWB L

Outputs the key operation signals.

2

OP control PWB

Controls the whole operation unit. (Displays information from the PCU PWB, and
sends operation information to the PCU PWB.)

3

Operation PWB R

Outputs the key operation signals.

4

LCD back light inverter PWB

Drives the LCD back light.

5

ICU-Main PWB

Controls the ICU SCN PWB, ICU IMG PWB, and CCD PWB. Converts digital
image data into video signals and sends them to the scanner (writing) unit.

6

ICU-SCN PWB

Performs correction of images outputted from the CCD.

7

ICU-IMG PWB

Performs image processes such as area separation, color correction, black
generation, gamma correction, and filter process.

8

CPT PWB

Recognizes the bank note patterns.

9

Original size sensor PWB
(Light reception)

Detects the original size.

10

Original size sensor (Light
emitting)

Outputs light to detect the original size.

11

CCD power PWB

Outputs the CCD PWB paper power.

12

Scanner motor PWB

Scanner motor control PWB.

Controls the
scanner motor.

13

PCU sub PWB

Controls the image process section.

14

High voltage power PWB
(MC/DV)

Generates the high voltage for main charger and the developing bias voltage.

15

Main charger interface PWB

Interfaces the main charger power.

16

OPC drum motor control/Signal
interface PWB

Controls (drives) the OPC drum motor. (AR-C150/C250/C160/C270)
Signals are interfaced. (AR-C160/C270)

17

Scanner lamp control PWB

Controls the scanner lamp

18

Humidity sensor PWB

Detects humidity in the machine.

Each correction of
image process
section is made by
this sensor data.

19

PCU MAIN PWB

Controls the engine section.

20

CCD ICU interface PWB

Relays the signal of CCD PWB and ICU-SCN PWB. (AR-C150/C250)
Generates the clock at the time of monochrome print operation and relays the
signal of CCD PWB and ICU-SCN PWB. (AR-C160/C270)

21

Paper tray lift unit control PWB

Controls the paper tray lift unit.

Provided in each
paper tray lift unit.

22

Discharge lamp PWB unit

Discharges electric charges on the OPC drum.

23

IFD PWB

Equipped with No. 1/2 paper tray paper exit detectors and the right upper door
open/close detector.

24

PFD PWB unit

Equipped with No. 3/4 paper tray paper exit detectors and the right lower door
open/close detector.

25

Process control PWB

Interfaces signals between the developing unit, OPC drum unit, the high voltage
PWB, and the PCU PWB.

26

Fusing control PWB (AC sub
PWB)

Interfaces the heater lamp drive control, sensor, detector signals.

27

High voltage power PWB (TC)

Generates the transfer voltage.

28

DC main power PWB
(AR-C100/C150/C250)
DC power PWB
(AR-C160/C270)

Generates the voltage used by the other units than the operation unit.

29

DC sub power PWB
(AR-C150/C250)
Power control PWB
(AR-C160/C270)

Generates the voltage for the operation unit (AR-C150/C250)
Controls powers of 24V, 5V and 3.3V in the sleep mode, the preheat mode, and
the normal mode. (AR-C160/C270)

30

AC power PWB

Controls the primary side power (AC power).

31

CCD PWB

Converts original images (light) into electrical signals.

5 –  9A