Read Sharp AR-155 (serv.man13) Service Manual online
2. Circuit descriptions
A. Man PWB (MCU)
(1) CPU signal table
PIN
No.
Signal
code
Input/output
Operating
1
/CS1
Output
Chip Select for SRAM
2
/CS0
Output
Chip Select for EPROM
3
D-GND
4
D-GND
5
5V
6
A0
Output
Address Bus (NC-pull up)
7
A1
Output
Address Bus
8
A2
Output
Address Bus
9
A3
Output
Address Bus
10
D-GND
11
A4
Output
Address Bus
12
A5
Output
Address Bus
13
A6
Output
Address Bus
14
A7
Output
Address Bus
15
A8
Output
Address Bus
16
A9
Output
Address Bus
17
A10
Output
Address Bus
18
A11
Output
Address Bus
19
D-GND
20
A12
Output
Address Bus
21
A13
Output
Address Bus
22
A14
Output
Address Bus
23
A15
Output
Address Bus
24
A16
Output
Address Bus
25
A17
Output
Address Bus
26
A18
Output
Address Bus
27
A19
Output
Address Bus (NC-pull up)
28
D-GND
29
A20
Output
Address Bus (NC-pull up)
30
NC-pull up
31
(SPPD)
Interruption
level input
SPF Paper Pass Detector
32
USB-IN
Input
USB Connector-In Detect
33
(MHPS)
Interruption
level input
Mirror Home Position Sensor
34
/CPU
SYNC
SYNC
Interruption
level input
Horizontal Synchronous (from
G/A)
G/A)
35
D-GND
36
D-GND
37
ZC
Interruption
level input
Zero-cross signal
38
/ASICINT
Interruption
level input
Intterupt from G/A
PIN
No.
Signal
code
Input/output
Operating
39
5V
40
D0
Data
input/output
Data Bus
41
D1
Data
input/output
Data Bus
42
D2
Data
input/output
Data Bus
43
D3
Data
input/output
Data Bus
44
D-GND
45
D4
Data
input/output
Data Bus
46
D5
Data
input/output
Data Bus
47
D6
Data
input/output
Data Bus
48
D7
Data
input/output
Data Bus
49
D8
Data
input/output
Data Bus
50
D9
Data
input/output
Data Bus
51
D10
Data
input/output
Data Bus
52
D11
Data
input/output
Data Bus
53
D-GND
54
D12
Data
input/output
Data Bus
55
D13
Data
input/output
Data Bus
56
D14
Data
input/output
Data Bus
57
D15
Data
input/output
Data Bus
58
5V
59
(OP-
DATA)
DATA)
Output
Data Signal for Operation
Panel
Panel
60
FTXD
Output
TXD for Additional Board
61
FRTS
Output
RTS for Additional Board
62
FRXD
Input
RXD for Additional Board
63
(OP-CLK)
Output
Clock for Operation Panel
64
TMON
Output
Power Supply Signal for Toner
Motor Driver IC
Motor Driver IC
65
D-GND
66
FCTS
Input
CTS for Additional Board
67
D-GND
68
D-GND
AR-F151
11 – 4
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