Sharp AR-280 Service Manual page 44

B. PWB location
1 2
5
26
25
24
23
22
21
20
19
18
No. Name
1 Operation key PWB L
2 LCD unit
3 Operation key PWB R
4 Invertor PWB
5 Operation control PWB
6 Fusing interface PWB
7 Copy lamp lighting PWB
8 CCD PWB
Copy lamp lighting interface
9
PWB
Document size detecting
10
PWB (Light emitting side)
11 Interface PWB
12 Scanner driver PWB
13 SCSI interface PWB
7/13/2000
3
4
6
7
8
9
10
11
12
14
15
16
17
illust: AR-280
Function, operation
Key input
Operation input, machine
state display
Key input
LCD backlight control
Operation input, display
control
Fusing unit, PCU interface
Copy lamp lighting control
Document image input
Copy lamp, PCU interface
Document size detection
Interface between the copy
lamp and the PCU
Optical system scanner unit
drive
Interface between the ICU
and the SCSI cable
1 2
5
26
25
24
23
22
21
20
19
No. Name
14 PCU PWB
15 AC power PWB
16 DC power PWB
17 High voltage PWB
18 Lift-up motor PWB
19 Paper transport sensor PWB
20 ICU PWB
21 Process thermistor PWB
22 Drum marking sensor PWB
Multi feed tray paper size
23
detection PWB
24 Process control PWB
Document size detecting
25
PWB (Light receiving side)
26 Discharge lamp PWB
5 – 4
3
4
6
7
8
15
16
17
illust: AR-505
18
Function, operation
Overall control of the copier
and options
AC power input
DC power supply
Process high voltage, bias
voltage supply
Paper tray bottom plate lift
up
Paper transport detection
Image process, image data
communication control
Temperature detection in
the process unit
Document size detection
Document size detection
OPC drum discharge
10
11
12
13
14