4 CIRCUIT OPERATIONS
4.1. CONNECTION DIAGRAM
Change from original page 119 (6.1. CONNECTION DIAGRAM)
LCD
(COB)
CN103
TO TEL LINE
DIGITAL
BOARD
CN104
TO EXT. TEL
CIS
POWER
SUPPLY
BOARD
CN504
3
4
1
2
5
6
7
8
9
10
CN506
1
2
3
4
5
CN508
+24V
+24V
PG
1
2
3
4
5
6
7
8
PG
+5V
TM
STB1
STB2
9
STB3
10
THCLK
11
THLAT
12
THDAT
CN505
CN301
CN304
FG
1
JOG2
2
JOG1
3
GND
4
+5V
5
KSTART
6
KLATCH
7
KSCLK
8
KTXD
9
+24V
+24V
+24V
PG
PG
DG
+5V
KRXD
10
1
2
3
4
5
6
7
8
9
CN509
+24V
+24V
+24V
PG
PG
DG
+5V
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
10
11
OPERATION
BOARD
1
2
3
4
5
6
7
8
9
RESET
11
CN102
CN502
DG
1
AG
2
+5VA
3
+5VD
4
+24V
5
HSRX
6
7
HSTX
8
9
1
2
3
4
5
6
7
8
1
+24V
2
+24V
3
GND
4
GND
5
+5V
6
THER
7
STB1
8
STB2
9
STB3
10
THCLK
11
THLAT
12
THDAT
9
CN101
CN501
BELL
1
2
3
4
P-SHORT
5
LINE RLY
6
BREAK
7
LINE RX
8
ANALOG BOARD
HAND
SET
CN105
HSMIC+
HSSP-
4
3
HSSP+
HSMIC-
2
1
THERMAL
HEAD
MOD RX
9
LINE TX
10
1
2
3
4
5
6
7
8
9
10
HOOK
SW
VSS
VDD
VO
RS
R/W
E
D4
D5
D6
D7
10
X501
32.768kHz
X502
24MHz
X503
32.256MHz
A
B
NA
MOTOR
NB
COM
CLK
SIG
GND
+5V
GND
SI
GND
G. LED
V. LED
POSITION SW
MPCS
GND
CN503
CN507
SPEAKER
SP+
SP-
1
2
1 2
CN303
HOOK
GND
1
2
CN401
1
2
23
KX-FP105RS