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5-5.
SCHEMATIC DIAGRAM – BASE MAIN Board (2/2) – •
1
2
R109
27k
C41
47p
X1
X5
D9
R69
1N4148
15k
R120
X6
9.1k
D10
R70
1N4148
33k
X7
D11
R71
1N4148
68k
3
5
(Page 16)
6
7
8
9
10
11
12
13
14
15
See page 15 for IC Block Diagrams.
C44
R116
0.1
4.7k
C45
C46
0.01
0.1
R78
C49
5.1k
47p
VOICE SPEAKERPHONE
U4
U4082B
R114
C47
PD
GND
24k
1000p
FI
CPR
CD
RLI1
VS
RLO1
C48
0.1
HTO+
TLO1
HTO-
TLI1
R111
10k
HTI
RECO
R115
C42
C53
220k
TO
RI
0.1
0.1
R112
C50
TI
RLI2
10k
0.1
C43
MICO
RLO2
220p
MIC
TLO2
MUTE
TLI2
VCI
CPT
CT
VB
R113
R68
120k
24k
R117
R119
56k
R121
C27
R95
C51
6.2k
0.1
8.2k
3300p
EC17
C34
EC8
1
50V
1000p
4.7
50V
R18
430k
R8
R1
R94
91k
0
0
R89
0
R96
1
EC1
100
C25
16V
0.1
X8
EC13
10
50V
C54
0.1
SPEAKER AMP
EC19
1
R85
50V
33k
EC18
EC14
INPUT+
R83
47
10
100k
50V
50V
INPUT-
OUTPUT1
EC15
VCC
2.2
50V
C52
R79
EC16
3300p
15k
2.2
50V
R81
EC11
2.2
50V
47k
EC10
2.2
50V
D13
R33
1N4148
22k
X3
EC12
47
16V
R118
220k
100k
EC9
100
16V
U13(1/4)
MC54/74HC4066
TEL LINE
U13(2/4)
SWITCH
MC54/74HC4066
C9
0.01
X2
C8
0.22
VCC
MC54/74HC4066
GND
EC20
100
C2
R66
16V
0.1
0
17
17
R86
33k
U14
KA8602B
EC22
10
50V
RIPPLE
REJ
MUTE
OUTPUT2
GND
R82
180k
C39
C37
R80
R10
330p
1000p
360k
180k
C38
1000p
T-DAT
TX DATA
RX AUDIO
C-DET
CAR DET
MCU CLK
PLL EN
P-CLK
PLL CLK
R91
R93
120k
68k
P-DAT
PLL DATA
R-DAT
RX DATA
C10
R9
R90
4.7
47k
150k
TX AUDIO
R103
47k
R92
39k
(1/4), (2/4)
R104
9.1k
INTCOM
INTCOM LED
U13(3/4)
R125
MC54/74HC4066
COL2
15k
ROW0
R124
ROW2
15k
ROW5
R76
LINE
LINE LED
15k
SPK
SPK LED
COL1
R122
15k
ROW4
R107
(3/4)
ROW3
15k
U13(4/4)
SPEAKER ON/OFF
ROW1
SWITCH
R123
HOLD LED
15k
CHRG
CHRG LED
R101
0
COL0
COL3
R36
0
WAIT
WAIT LED
R27
MSG
N MSG LED
0
SPP-N1025/N1026
MIC101
MIC
J2
1
VREG
A1
GND
PLL EN
RF UNIT
GND
12
J4
1
COL2
ROW0
ROW2
ROW5
VREG
COL1
ROW4
ROW3
ROW1
(Page 19)
VREG
COL0
COL3
GND
SPK(+)
SPK(-)
22
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