Panasonic KX-TCD420GS Service Manual page 115

(1)
(2)
(3)
(7)
C93
N.M
C31
10p
(8)
(9)
(10)
(11)
(12)
(14)
C47
(15)
(20)
R72
+2.8V
R73
D9
1
Q12
R71
3 2
1K
R74
C12
NC
R17
NC
Q6
Q5
NC C13
R18
NC
NC
R16
NC D7
R19
NC
R20
0
Q7
BC847B
+2.8V
Q8
R38
1K
TP7
EARTH
R54 100K
R55
100
C92
+2.8V
D10P
C32
10p
C35
10p
C94
N.M
TP103
TP102
TP101
VSS
109
LSON
110
LHONI
111
LHON
112
LHOP
113
LHOPI
114
LSOP
115
VSSA
116
VDDA
117
LMICS
118
LMIP
119
LMFBN
120
LMFBP
121
LMIN
122
SON
123
HONI
124 IC8
HON
125
HOP
126
HOPI
127
SOP
128
K0.082
REFVH
129
BREF
130
VSSA
131
VDDA
132
MIP
133
MFBN
134
MFBP
135
MIN
C48 K0.1 136
ADREFP
137
ADREFN
138
RSSI
139
AD3
140
AD4
141
MPCINP
142
RESETQ
143
+2.8V R70 VDD
144
10K
+2.8V
1K
1K
100
C56
ON-HOOK: 0V
OFF-HOOK: about DC 3.9V
TP6
R34
390
Q9
R23 R85 R25 C18
5.6K 680 100K
K1.0
C19
C89
K0.1
NC
D10P
Q10
R33
C88
R28
NC
470K
CLIP_STATE
TP8
4.7V(M)
D13
K1000P
C70
S1 3
10K
4
1 2
R56
2.8V DC
TP105
TP104
+2.8V
PX.2
72
P0.0
71
P0.1
70
P0.2
69
P0.3
68
VSS
67
VDD
66
P0.4
65
P0.5
64
P0.6
63
P0.7
62
DAB7
D7
61
DAB6
D6
60
DAB5
D5
59
DAB4
D4
58
DAB3
D3
57
VSS
56
VDD
55
DAB2
D2
54
DAB1
D1
53
DAB0
D0
52
AD15
A15
51
AD14
A14
50
AD13
A13
49
AD12
A12
48
AD11
A11
47
VDD
46
VSS
45
AD10
A10
44
AD09
A9
43
AD08
A8
42
AD07
A7
41
AD06
A6
40
AD05
A5
39
AD04
A4
38
AD03
A3
37
FREQ 10.368MHz
1V
KX-TCD420GS
C40
Z1.0u
C41
K0.1
C42
4.7k
C43
Z1.0u
C86
N.M C62 6P
R79
ANT1
39
R80
ANT2
39
+4.0V
N.M
1
2
3
TXDA
4
RSSI
5 RSSI
R82 33
TX-DATA
6 VCC_OC
7 GND
SYCL
8 SYCL
SYDA
9 SYDA
SYEN
10 SYEN
11 GND
RXDSG
SYRI
4.7u
RXDA
DRON
RX-DATA
SCHEMATIC DIAGRAM (BASE UNIT)
+4.0V
Q13
J101
1
J102
1
J103
1
ÕSDAÕ
J104
1 ÕSCLÕ
J105
1
D10 C84
1 3 2p
C66 N.M
2
180
C83
N. M
R84
ANT
C81
GND
GND 28
GND
VCC_PA 27
GND
GND 26
TXDA PAON 25
PSEL 24
IC9 GND 23
GND 22
GND 21 C96
RXDA 20
GND 19
D10P
GND 18
L2
TP15
10.368MHz burst
428 s
406 s
peak
+3.1V
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