Service manual
Pin
No.
Signal
name
In/
Out
Function
107
MCR2
—Nu
108
WAIT
Out Wait request signal
109
EXWAIT
In
External wait control input signal (NU)
+5V
110
RA18
Out Nu
111
RA17
Out Nu
112
GND
— GND
113
RA16
Out Nu
114
RA15
Out Nu
115
RDO
Out Expansion RD signal
Option
116
WRO
Out Expansion WR signal
117
EXINT3
In RS232C /CD interrupt
118
EXINT2
In Option PWB (PULL UP)
119
EXINT1
In RS232C /CI interrupt
120
EXINT0
In Option PWB (PULL UP)
121
OPTCS
Out
Chip select base signal for expansion
option
122
ROS1
Out ROM 1 chip select signal
123
ROS2
Out ROM 2 chip select signal (NU)
124
RAS2
Out RAM 2 chip select signal
125
RAS1
Out RAM 1 chip select signal
126
RJRST
In Printer reset signal
127
RJTMG
In FOR TPRC (NU) +5V
128
DT4
Out Printer dot signal 4 (NU)
129
DT3
Out Printer dot signal 3 (NU)
130
DT2
Out Printer dot signal 2 (NU)
131
DT1
Out Printer dot signal 1 (NU)
132
GND
— GND
133
DT7
Out Printer dot signal 7 (NU)
134
DT6
Out Printer dot signal 6 (NU)
135
DT5
Out Printer dot signal 5 (NU)
136
MTD
Out Printer motor
drive signal (NU)
137
MTD
Out Printer motor drive signal (NU)
138
DOT9
Out Printer dot signal 9 (NU)
139
DOT8
Out Printer dot signal 8 (NU)
140
SYNC
— Nu (+5V)
141
ASKRX
— I/R input from I/R unit (NU) Pull-up
142
VCC
— +5V
143
GND
— GND
144 — — Nu
145
RAS3
Out Nu
146
RJMTR
In
Printer motor lock detection signal (NU)
GND
147
SLMTD
Out Nu
148
SLMTS
Out Nu
149
SLMTR
In GND
150
HTS2
Out Serial output to FMC unit
151
SCK2
Out Serial clock to FMC unit
152
STH2
In Serial input to FMC unit
153 — — Nu
154 — — Nu
155 — — Nu
156 — — Nu
157 — — Nu
158
LCDWT
IN TPRC wait signal
159
DOTEN
Out Dot drive enable signal (Nu)
160
RASP
—Nu
2-3. CKDC8
1) Pin configulation
2) Pin assignment (CKDC8)
Pin
No.
SYMBOL
SIGNAL
NAME
IN/
OUT
FUNCTION
1 DP DP OUT DISPLAY SEGMENT Dp
2 A SA OUT DISPLAY SEGMENT a
3 B SB OUT DISPLAY SEGMENT b
4 C SC OUT DISPLAY SEGMENT c
5 D SD OUT DISPLAY SEGMENT d
6 E SE OUT DISPLAY SEGMENT e
7 F SF OUT DISPLAY SEGMENT f
8 G SG OUT DISPLAY SEGMENT g
9 VSS0 GND GND
10 VDD0 VDD VDD
11 KR4 KR4 IN KEY RETURN 4
12 KR10 KR10 IN
KEY RETURN (feed clerk
MRS sw)
13 KR11 KR11 IN KEY RETURN (MODE sw)
14 KR8 NU IN GND
15 HTS HTS IN
16 STH STH OUT
17 /SCK /SCK IN SHIFT CLOCK
18 ST0 ST0 OUT KEY STROBE 0
19 ST1 ST1 OUT KEY STROBE 1
20 ST2 ST2 OUT KEY STROBE 2
21 ST3 ST3 OUT KEY STROBE 3
22 ST4 ST4 OUT KEY STROBE 4
23 ST5 ST5 OUT KEY STROBE 5
24 VDD1 VDD VDD
25 AXSS GND GND
26 KR9 NU GND
27 KR0 KR0 IN KEY RETURN 0
28 KR1 KR1 IN KEY RETURN 1
29 KR2 KR2 IN KEY RETURN 2
30 KR3 KR3 IN KEY RETURN 3
31 KR5 KR5 IN KEY RETURN 5
NU
NU
G10
G9
G8
G7
G6
G5
G4
G3
G2
G1
BUZ
/POFF
NU
ST8
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
DP
SA
SB
SC
SD
SE
SF
SG
GND
VDD
KR4
KR10
KR11
NU
HTS
STH
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
ST7
ST6
/RESETS
/SHEN
ERC
LDRQ
GND
GND
/RES0
VDD
GND
KR7
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
/SCK
ST0
ST1
ST2
ST3
ST4
ST5
VDD
GND
NU
KR0
KR1
KR2
KR3
KR5
KR6
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
CKDC8
4 – 8