Laser Scanner Section - Sharp AR-M355U Service Manual

5. Laser scanner section

B. Major parts and signal functions
MOTHER
MFP
BOARD
CONTROL
PWB PWB
CN1
Signal
Code
name
PM PM Polygon mirror (motor)
BD BD PWB
No. Name Code, signal name
RW Control signal +5VLD
RW Control signal /READY
RW Control signal /PMCLK
RW Control signal /START
RW Control signal /VIDEO
RW Control signal /SYNC
AR-M351U/M451U, AR-M355U/M455U MAINTENANCE AND DETAILS OF EACH SECTION 7 - 43
PCU
PWB
CN2
SLD30R-1
CN16
30 +12V2
S32B-PHDSS-B
PCU_VCCW
29
BR
TEST3
28 GND 1
BR
27 DTR_PCU TEST2 2
GY
26 GND GND2 3
BR
25 DSR_PCU /SYNC 4
GY
24 GND GND2 5
GY
23 TXD_PCU GND2 6
GY
22 GND GND2 7
BR
21 RXD_PCU LSU_S/H 8
BR
20 POF VRB 9
GY
10
19 MSW_MON GND2
CN2 GY
GND GND2 11
18
BR
17 RES_PCU TEST 12
BR
GND VIDEO
16 13
LBR
15 HSYNC /VIDEO 14
BR
GND /LDON
14 15
GY
13 DTEN GND2 16
GY
12 BUR_PR GND2 17
BL
11 GND2 +5V2 18
GY
10 VIDEO1 GND2 19
BL
9
VIDEO0 +5V2 20
RD
8 GND +24V1 21
RD
7
+5V1 +24V1 22
BR
6 +5V2 /VFM1 23
GY
5
+5V2 GND2 24
BR
4 +5V2 /START 25
BR
3 +5V2 /VFM1 26
BR
2 +5V2 /PMCLK 27
BR
1 +12V1
/READY 28
GY
GND2 29
GY
GND2 30
BL
+5V LD 31
GY
GND2 32
Name Type
5V power for laser diode
Polygon mirror motor READY signal ("L" in the constant speed rotation)
Clock signal for driving the polygon mirror motor
Polygon mirror motor drive start signal
VIDEO (Image signal)
Sync signal (SYNC) from BD, sync signal for 1 line
A. General
Image data sent from the MFP (image process circuit) through the
mother board and PCU are converted into laser beams to radiate
onto the drum surface.
5
2
6
10
BD
3
4
CN2
S32B-PHDSS-B
45 sheets (35 sheets)
TEST3
32
CN1
31 TEST2
S11B-PH-K-S
30 GND2
45 sheets (35 sheets)
RD
29 /SYNC
+24V1 11
BR
28 GND2
VFM1\ 10
GY
27 GND2
GND2 9
RD
26 GND2
+24V1 8
BR
25 LSU_S/H
VFM1\ 7
GY
24 VRB
GND2 6
RD
23 GND2
+24V1 5
BR
GND2
22
PMCLK\ 4
BR
21 TEST
READY(READY\)
3
BR
VIDEO
20
START\ 2
GY
19 /VIDEO
GND2
1
/LDON
18
17 GND2
16 GND2
LSU
15 +5V2
14 GND2
13 +5V2
12 +24V1
CN3
11 +24V1 S4B-PH-K-S
BR
10 /VFM1 GND2
1
LB
9 GND2 SYNC\ 2
BR
/START GND2
8 3
BL
7 /VFM1 +5V2 4
/PMCLK
6
5 /READY
GND2
4
3 GND2
2 +5V LD
1 GND2
1
Function/Operation
Reflects laser beams at the constant rotation speed.
Detects the laser scan start timing. This device is used
to detect a laser trouble.
Function
1
PM
7
9
PHNR-03-H+BU03P-TR-P-H
RD
3 +24V1
1
BR
2 VFM1\ 2
GY
1 GND2
3
POWER SOURCE
SECTION
PHNR-03-H+BU03P-TR-P-H
RD
3 +24V1 1
BR
2 VFM1\ 2
GY
1 GND2
3
PHR-5
PMCLK
1
2 READY
3 START\
4 GND2
+24V1
5
B4B-PH-K-S
GND2
4
3 SYNC\
GND2
2
1 +5V2
8
VFM1
VFM1
NOTE