3. Main circuit
(1) Block diagram
(2) CPU (IC110) M37702
1
Outline
The M37702M2-XXXFP is a 16-bit, single-chip microprocessor which
employs the high performance silicon gate CMOS process, and it is
packed in 80-pin plastic mold flat package. The single chip
microprocessor is equipped with a big address space of 16MB, the
command cue buffer to execute commands at high speeds, and the
data buffer. The CPU is of 16 bit parallel process, and allows selec-
tion of 8 bit parallel process mode if necessary.
2
Pin arrangement
FW
IC109
IC105
RAM
IC103
Q101
IC101
IC113
IC112
Q102
Q103
Q109
Q108
Q110
Q111
IC112
IC112
IC111
Q107
Q105
IC107
IC111
Lower unit
control
Counter
Lens motor
Main motor
control
Mirror motor
AE sensor
Driver
(Invertor)
IC102
IC104
IC106
IC108
CP U
IC110
+32V
+24V
+5V1
+5V2
FW
GND
+5V2
FW
Operation panel
Multi bypass detection paper
transport sensor
Mirror home position sensor
Lens home position sensor
Paper exit sensor
SPF paper transport sensor
Ventilation fan
Cooling fan
SPF fan
Heater lamp
Copy lamp
Power relay
Blank lamp
Discharge lamp
Transport clutch
Separation solenoid
Multi bypass paper
feed clutch solenoid
SPF motor control
SPF paper feed
transport clutch
Power switch
Thermistor
Toner sensor
Developer color detection
Main PWB destination detection
SPF paper sensor
DC power section
Toner motor
Thermistor
IC104
IC104
IC108
1
P70/AN0
2
P67/TB2IN
3
P66/TB1IN
4
P65/TB0IN
5
P64/INT2
6
P63/INT1
7
P62/INT0
8
P61/TA4IN
9
P60/TA4OUT
10
P57/TA3IN
11
P56/TA3OUT
12
P55/TA2IN
13
P54/TA2OUT
14
P53/TA1OUT
15
P52/TA1IN
16
P51/TA0OUT
17
P50/TA0IN
18
P47
19
P46
20
P45
21
P44
22
P43
23
P42/
Φ
1
24
P41/RDY
64
P84/CTS1/RTS1
63
P85/CLK1
62
P86/RXD1
61
P87/TXD1
60
P00/A0
59
P01/A1
58
P02/A2
57
P03/A3
56
P04/A4
55
P05/A5
54
P06/A6
53
P07/A7
52
P10/A8/D8
51
P11/A9/D9
50
P12/A10/D10
49
P13/A11/D11
48
P14/A12/D12
47
P15/A13/D13
46
P16/A14/D14
45
P17/A15/D15
44
P20/A16/D0
43
P21/A17/D1
42
P22/A18/D2
41
P23/A19/D3
25
P40/
H
O
LD
26
BY
T
E
27
CNV
S
S
28
R
E
SET
29
XI
N
30
XO
U
T
31
E
32
VS
S
33
P33/
H
L
D
A
34
P32/
A
L
E
35
P31/
B
H
E
36
P30/
R
/W
37
P27/
A
23/
D
7
38
P26/
A
22/
D
6
39
P25/
A
21/
D
5
40
P24/
A
20/
D
4
80
P
71/
AN
1
79
P
72/
AN
2
78
P
73/
AN
3
77
P
74/
AN
4
76
P
75/
AN
5
75
P
76/
AN
6
74
P
7
7
/A
N
7
/A
DTRG
73
V
S
S
72
A
VSS
71
VR
E
F
70
A
V
C
C
69
V
C
C
68
P
80/
C
T
S0/
R
T
S
0
67
P
81/
C
LK0
66
P
8
2
/RX
D0
65
P
8
3
/TX
D0
M
3
77
02
M
2
-X
X
X
FP
12 – 2