Outline - Sharp SF-2314 Service Manual

3. Main circuit
(1) Block diagram
Lower unit
Operation panel
control
IC109
Toner motor IC105
RAM
IC103
+32V +24V +5V1 +5V2
Q101 IC101
DC power section
(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.
Multi bypass detection paper
transport sensor
Mirror home position sensor
Lens home position sensor
Paper exit sensor
SPF paper transport sensor
Q102
IC104
IC108
CP U
IC110
IC113 IC112
FW GND
+5V2 FW
Ventilation fan Heater lamp
Cooling fan Copy lamp
SPF fan Power relay
Q103 Q109 Q110
Q108
IC104
IC112
Thermistor
IC112
Q107
IC111
FW
Thermistor
Toner sensor
Developer color detection
Main PWB destination detection
SPF paper sensor
2
Pin arrangement
P70/AN0 1
P67/TB2IN 2
P66/TB1IN 3
P65/TB0IN 4
P64/INT2 5
P63/INT1 6
P62/INT0 7
P61/TA4IN 8
P60/TA4OUT 9
P57/TA3IN 10
P56/TA3OUT 11
P55/TA2IN 12
P54/TA2OUT 13
P53/TA1OUT 14
P52/TA1IN 15
P51/TA0OUT 16
P50/TA0IN 17
P47 18
P46 19
P45 20
P44 21
P43 22
P42/Φ1
23
P41/RDY 24
12 – 2
Counter
Blank lamp
Discharge lamp
Q111
Driver
(Invertor)
IC102
IC104
IC106
IC108
IC107
Q105
IC111
Transport clutch
Separation solenoid
Multi bypass paper
feed clutch solenoid
Lens motor
SPF motor control
SPF paper feed
transport clutch
Main motor
control
Power switch
Mirror motor
AE sensor
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