4. PWB (Explained with the SF-2120 and the SF-CM15)
No
Name
Description
No
Name
Description
1
Operation PWB A
Operation input, display control
2
Operation PWB B
Operation input, display control
3
Blank lamp PWB
Used to control the blank lamp.
4
DL PWB
Used to drive the discharge lamp.
5
Optical PWB
AE sensor and lens motor interface
6
Process control PWB
Used to sense the toner density.
7
Main PWB
Used to control the body.
8
AC circuit PWB
AC power input
9
CSD PWB
Used to sense the body cassette
size.
F
DC circuit PWB
DC power input
G
Paper feed power PWB
(SF-CM15)
Used to supply power to drive the
paper feed unit.
H
Motor control PWB
Used to drive and control the
paper feed motor and the
transport motor.
I
CSD B PWB
Used to sense the cassette size of
2nd
∼
4th tray.
J
Motor sensor PWB
Encoder for 2nd
∼
4th paper feed
motor
K
Tray module PWB
Vertical transport of 2nd
∼
4th
cassette, JAM detection, paper
feed clutch interface
L
DPPD PWB
Vertical transport of 2nd
∼
4th tray,
JAM detection and cover open
detection
M
ADU PWB
ADU control
N
PID PWB
Manual paper entry detection
O
PPD PWB
Body PR roller JAM detection
P
High voltage PWB
Process high voltage, developing
bias voltage supply
Q
PDD PWB
Body paper exit section JAM
detection, ventilation fan motor
interface
R
Paper feed I/F PWB
I/F of copier paper detection and
the paper feed clutch.
S
Sub DC power PWB
Used to supply power in the power
save mode. (5V is supplied to the
main PWB and the operation
PWB.)
14
22
12
7
8
9
13
15
6
18
20
19
10
17
1
3
4
5
2
21
11
23
16
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