Riso GR 3770 - Page 77

DESCRIPTION OF PCBs
SYSTEM PCB2
GR3770APX(II)-9
GND1
GND1
Ink sensor (HIGH with ink)
Overflow sensor (HIGH with ink)
+12V
+24V
Inking motor (LOW in operation)
GND1
N.C.
GND1
Det. A sensor (LOW when blocked)
Det. C sensor (LOW when blocked)
+5V
GND1
Drum size data signal 1 SW1
Drum size data signal 2 SW2
Drum size data signal 3 SW3
Drum size data signal 4 SW4
Ink color data signal 1 SW5
Ink color data signal 2 SW6
ADGND
Temp. det. sensor
ADVCC
N.C.
N.C.
N.C.
GND1
Bottle set switch SW1
Bottle set switch SW2
Bottle set switch SW3
CN15
Br
Rd
Or
Yw
Gr
Bl
Vt
Gy
Wh
Bk
Br
Rd
Or
Yw
Gr
Bl
Vt
Gy
Wh
Bk
Br
Rd
Or
Yw
Gr
Bl
Vt
Gy
Wh
Bk
30pins
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
Drum Control
PCB2 CN1
Write P/M (A pulse)
Write P/M (Com. A pulse)
Write P/M (B pulse)
Write P/M (Rev. A pulse)
Write P/M (Com. B pulse)
Write P/M (Rev. B pulse)
GND1
LOW when pressed
LOW when lit
+24V
GND1
LOW when pressed
GND1
HIGH when closed
LOW in operation
+24V
LOW in operation
+24V
LOW in operation
+24V
GND1
LOW when connected
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
1
2
3
4
5
6
1
2
3
4
1
2
1
2
1
2
3
4
5
6
Rd
Bk
Bl
Yw
Wh
Or
Bk
Bk
Or
Yw
Bk
Br
Bl
Rd
Br
Rd
Or
Yw
Gr
Copy counter
S
M
SW
Write pulse motor
Master counter
Drum home position
button (Normal open)
Front cover set switch
Lock solenoid
Drum set switch
LAMP
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
1
2
3
4
5
6
9
10
11
12
~~~~~
Br
Rd
Or
Yw
Gr
Bl
Vt
Gy
Wh
Bk
Br
Rd
Or
Yw
Gr
Bl
Vt
Gy
Wh
Bk
Br
Rd
Or
Yw
Gr
Bl
Wh
Bk
Br
Rd
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
1
2
3
4
5
6
9
10
11
12
~~~~~
Drum Control
PCB2 CN1
CN14 22pins
Br
Rd
Or
Yw
Gr
Bl
Vt
Gy
Wh
Bk
Br
Rd
Or
Yw
Gr
Bl
Vt
Gy
Wh
Bk
Br
Rd
Counter set signal
SW
SW
MC
TC
Drum home position lamp
CN10 15pins
GND1
GND1
RESET/
Elevator CTL1
Elevator CTL2
Main motor CTL1
Main motor CTL2
Main motor CTL3
Main motor CTL4
Det. A signal
Paper tray pos. sig.
Lower limit sig.
Paper feed safety sig.
Main motor stop sig.
P-F pressure adj. sw. sig.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Gy
Gy
Gy
Gy
Gy
Gy
Gy
Gy
Gy
Gy
Gy
Gy
Gy
Gy
Gy
Motor Control
PCB MK2
CN2