Service manual

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
CPU
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
1P70/AN0
2P67/TB2IN
3P66/TB1IN
4P65/TB0IN
5P64/INT2
6P63/INT1
7P62/INT0
8P61/TA4IN
9P60/TA4OUT
10P57/TA3IN
11P56/TA3OUT
12P55/TA2IN
13P54/TA2OUT
14P53/TA1OUT
15P52/TA1IN
16P51/TA0OUT
17P50/TA0IN
18P47
19P46
20P45
21P44
22P43
23
P42/Φ1
24P41/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
25P40/HOLD 26BYTE 27CNVSS 28RESET 29XIN 30XOUT 31E 32VSS 33P33/HLDA 34P32/ALE 35P31/BHE 36P30/R/W 37P27/A23/D7 38P26/A22/D6 39P25/A21/D5 40P24/A20/D4
80 P71/AN1 79 P72/AN2 78 P73/AN3 77 P74/AN4 76 P75/AN5 75 P76/AN6 74 P77/AN7/ADTRG 73 VSS 72 AVSS 71 VREF 70 AVCC 69 VCC 68 P80/CTS0/RTS0 67 P81/CLK0 66 P82/RXD0 65 P83/TXD0
M37702M2-XXXFP
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