Schematic Diagram (Handset) - Panasonic KX-A144 Series Service Manual

KX-TCD440HGS / KX-TCD440HGT / KX-A144EXS-1 / KX-A144EXS / KX-A144EXT-1 / KX-A144EXT

39 SCHEMATIC DIAGRAM (HANDSET)

TP3
CN3
BATTERY+ 1
BATTERY- 2
TP4
TP5 TP20
L4
10uH
CN1
CHARGE+ 1
CHARGE- 2
TP6 TP21
L5
10uH
LCD BACKLIGHT
Q101
KEY BACKLIGHT
LED104 Green
R104
LED105 Green
Q102
68
LED106 Green
Green
LED107
PL.0
S0
PL.1
36
S1
35 PL.2
S2
34 PL.3
S3
33 PL.4
PL.5
S4 32
S5 PL.6
31
S6 30 PL.7
S7 29 PL.8
S8
PL.9
28
S9
27 PL.10
S10
26 PL.11
S11 PL.12
25
S12 PL.13
24
S13 23 PL.14
S14 22 PL.15
S15 PL.16
21
S16
20 PL.17
S17
19 PL.18
S18
18 PL.19
S19
17 PL.20
S20 16 PL.21
S21 15 PL.22
S22 PL.23
14
S23 PL.24
13
S24
12 PL.25
S25
11 PL.26
S26
10 PL.27
S27
9 PL.28
S28
8 PL.29
S29
7 PL.30
C0 PL.31
6
C1
5 PL.32
C2
4 PL.33
C3
3 PL.34
C4
2 PL.35
C5 1
CN2
L2 D1
F1
47uH
D
R3
G
56
S
Q1
R6
3.3K
2.65V DC
IC2
Q2
1 A0 8
VCC
2 A1 7
WP
Q3
3 A2 6
SCL
4 GND 5
SDA
+4V
'BATT' TP12
'SDA' TP7
'SCL' TP8
'GND' TP10
PO.3
Q103
PY.4
S8 S14 S19 S24 S7
Õ2Õ Õ8Õ Õ1Õ Õ9Õ ÕCancelÕ
PY.3
S13 S15 S20 S18
Õ5Õ Õ7Õ Õ4Õ Õ#Õ
PY.2
S6 S17 S2 S4 S11
ÕLEFTÕ Õ0Õ ÕTALKÕ Õ3Õ ÕUPÕ
PY.1
S12 S25 S22 S23 S9
ÕREDIALÕ ÕRÕ ÕTEL BOOKÕ ÕINTÕ
Õ ->Õ
PY.0
S1 S16 S5 S3 S21
ÕDOWNÕ Õ*Õ ÕSPÕ Õ6Õ ÕRIGHTÕ
TP19
3.9V DC
TP4V
+4V
C27
K0.1
VBACK
R16
NC
PL.13
81 PL.13
PL.14
82 PL.14
PL.15
83 PL.15
PL.16
84 PL.16
C21
85 VSS
86 VDD
PL.17
87 PL.17
K0.1
88 P0.0
89 P0.1
PL.18
90 PL.18
PL.19
91 PL.19
PL.20
92 PL.20
PL.21
93 PL.21
PL.22
94 PL.22
PL.23
95 PL.23
PL.24
96 PL.24
PL.25
97 PL.25
PL.26
98 PL.26
PL.27
99 PL.27
PL.28
100PL.28
REG
TP18
2.65V DC
86
50
P0.5(AD4N)
P0.4(ADBAT) 49
48
ADRSSI
C30 K0.1
ADREF 47
MICN 46
MICP 45
MICS 44
C29 K0.1
43
BREF
HOP 42
IC1
41
HON
C28 K0.1
VSSA 40
39
VDDA
CHARGE_START(P0.2) 38
VDDLR 37
36
VDDBAT
VDDLO 35
34
VDDPM
XTAL 33
32
LOAD
VSSO 31
(1)
(2)
(3)
(4)
(10)
(11)
(12)
(13)
(14)
(15)
(16)
(17)
(18)
(19)
(22)
(23)