Panasonic KX-TCA181RUT Service Manual page 89

Loop Current
(1)
TP9
RX_AF
(2)
(3)
(4)
(5)
(6)
VDD1 +1.8V
(7)
+2.5V
Q2
(8)
C310 NC
C28
R85
K0.22u
(9)
(10)
R135
(11)
10K
(12)
SW1
(13)
R52
470
Q8
R50 C130
( )
D10p
C46 R49
R44 R47
2.2K 100K K1u 56
(2125)
R71
100K
+2.5V
R39
18
10.368MHz
2.5Vp-p
0V
D20
R161
Q3
15
(1005)
RDY
3.3K
RESET
C48
K0.1u(1005)
KX-TCD815RUS / KX-TCD815RUT / KX-TCA181RUS / KX-TCA181RUT
TX_AF
TP10
3.3V
+3.3V
Q6
+2.5V
RSSI
R124
RFCLK
0
(1005)
LE
SK
+2.5V
+8V
J101
J104
R84
TP23
100
R64
J103
1K
R55
J102
1K
(1005)
KX-TCD815 SCHEMATIC DIAGRAM (Base Unit)
89
ANT_2
ANT_1
R121
R120
( ) ( )
NC
NC
L3
C138
( )
NC
A_1
C137
A_2
ANT ( )
NC
1 GND1 26
GND14
2 ANT2 GND13 25
3 VCCPA 24
GND12
4 GND2 23
GND11
5 GND3
GND10 22
IC2
6 VCC_OC
7 GND4 ANT1 21
RF
8 RSSI 20
RESET
Module
9 SYRI 19
GND9
10 GND5
TXDA 18
17
GND8
CLK
R125
0
(1005)
RX DATA
+2.5V
NC IC5
1
RDY/BUSY NC32
2
RESET NC31
3
WP NC30
4
NC4 NC29
+3.3V
5
NC5 NC28
6
NC6 NC27
7
VCC NC26
8
GND NC25
9
NC9 NC24
10
NC10 NC23
11
NC11 NC22
12
NC12 NC21
13
CS NC20
14
SCK NC19
15
SI NC18
16
SO NC17
R133
( )
NC
(1005)
NC: No Components
TX DATA
R117
1K
RESET
(1005)
R127
TDO
100
(1005)
SIO
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17