Read Panasonic KX-TG2238CG Service Manual online
SPP
SPM
MICP
VBAT
VSS
CHG2
CHG1
220K
R228
Q205
100
R222
47K
R244
K0.22
C255
0.1
C221
K0.033
C232
K0.22
C231
2.2K
R253
10K
R232
10K
R224
Q206
0.1
C218
L203
NC
C247
NC
C241
0.1
C224
100
R212
100
R213
RX
TX
2.2M(1%)
R234
MICM
0.1
C228
K0.033
C230
39K
R246
Q207
39K
R248
10K
R245
BATTLOW
1.0
C233
NC
C256
C205
J100P
R247
1.8K
C267
6.3V22
8.192M
X201
NC
R219
NC
C259
C274
0.1
C214 0.1
NC
C295
R270
100K
1.0
C217
TDO
TDI
TMS
TCK
NC
D213
NC
D212
NC
R273
NC
R239
NC
R275
0
R233
NC
C287
R231
1K
R229
1K
R230
1K
10K
R265
D214
D216
MIC
L209
47
R302
47
R303
NC
C269
C294
0.1
NC
C300
C304 0.1
100-13/AGPIO_0-AGPIO_13
16-27/EGPIO_4-EGPIO_15
56/BGPIO_0/CE0
59-61/BGPIO_3-BGPIO_5
67-70/BGOIO_11-BGPIO_14
74/CGPIO_0, 79/CGPIO_10
98-99/CGPIO_12-CGPIO_13
80-95/DGPIO15-DGPIO_0
59-61/BGPIO_3-BGPIO_5
67-70/BGOIO_11-BGPIO_14
74/CGPIO_0, 79/CGPIO_10
98-99/CGPIO_12-CGPIO_13
80-95/DGPIO15-DGPIO_0
IC201
1N
C
2N
C
3
U
AR
T_RX
4
U
AR
T_TX
5N
C
6
KEYSTR
OBE_F
7
KEYSTR
OBE_E
8
KEYSTR
OBE_D
9
KEYSTR
OBE_C
10
KEYSTR
OBE_B
11
KEYSTR
OBE_A
12
NC
13
HEADSET_DET
14
VCC
15
GND
16
DO
T_DB4
17
DO
T_DB5
18
DO
T_DB6
19
DO
T_DB7
20
DO
T_E/RD
21
DO
T_R
W/WR
22
DO
T_RS
23
SIODO_RF
24
SIOLE_RF
25
SIOCLK_RF
26
SIDOI
27
DO
T_RESET
28
GND
29
SPOUTP
30
GNDPA
31
SPOUTN
32
VCCPA
33
HSSPOUT
34
LOUT0
35
DCIN0
36
LIN0
37
NC
38
NC
39
NC
40
NC
41
VCCA
42
DC/DC_MONITOR
43
GNDA
44
HSMIP
45
VREF
46
MIN
47
MIP
48
RSSI
49
GNDPLL
50
VCCPLL
51
XOUT
52
XIN
53
GND
54
RSTN
55
PDN
56
MIC_PO
W_SW
57
TXO
58
RXGAIN
59
EEP_DI
60
EEP_DO
61
NC
62
RSTH
63
RXEN
64
TXEN
65
SHCTRL
66
RXI
67
NC
68
NC
69
DC/DC_PWM
70
NC
71
RADIOEN
72
GND
73
VCC
74
CHARGE_DET
75
TCK
76
TMS
77
TDI
78
TDO
79
CHG_LED
80
NC
81 NC
82 KEYIN_5
83 KEYIN_4
84 KEYIN_3
85 KEYIN_2
86 KEYIN_1
87 NC
88 EEP_CS
89 NC
90 NC
91 NC
92 KEY_BACKLIGHT
93 LCD_BACKLIGHT
94 LCD_POWER_SW
95 EEP_WP
96 GND
97 VCC
98 NC
99 EEP_CLK
82 KEYIN_5
83 KEYIN_4
84 KEYIN_3
85 KEYIN_2
86 KEYIN_1
87 NC
88 EEP_CS
89 NC
90 NC
91 NC
92 KEY_BACKLIGHT
93 LCD_BACKLIGHT
94 LCD_POWER_SW
95 EEP_WP
96 GND
97 VCC
98 NC
99 EEP_CLK
100
NC
2.2M(1%)
R235
NC
NC
GND
VIN
V
OUT
NC
D202
6.3V22
C257
C308
C3P
Q204
R278
100K
R279
100
R276 470
R277
470
C306 0.1
C307 K0.1
IC204
3.0V
1
CONT
2
GND
3
NOISE
4
V
out
5
Vin
K0.01
C243
0.1
C244
R306
100K
C309
K0.1
R280
1.8K
100K
R281
TPP
TPM
R242
C298
J100P
C299
J100P
R243
RA201
100K
1
3
5
7
8
6
4
2
6
4
2
C310
NC
R249
1.2K
1.2K
R250
K0.082
C277
L210
22uH
Q212
G
S
D
D217
C318
6.3V330
R325
1.8M(1%)
R326
1M(1%)
NC
R200
NC
C270
560
R216
LED210
LED211
150
R215
NC
D201
NC
R238
CN203
1
GND
2
MIC1
3
MIC2
4
SP2
5
SP1
BA
TT1
BA
TT2
C213
6.3V330
NC
C260
C223
6.3V10
C220
6.3V100
BT
NC
R274
IC203
3.0V
1
OUT
3
GND
2
IN
R223
1K
R237
100K
NC
C234
NC
R236
NC
D204
NC
R225
NC
C317
L205
L206
L207
L208
IC205
2.6V
2
IN
1
OUT
3
NC
4
GND
D206
D205
D208
D207
C293
J220P
NC
C238
NC
L204
NC
C225
NC
C296
NC
C222
C280
NC
C227
NC
NC
C285
D211
NC
NC
C239
R226
NC
C236 C4P
C237 C4P
NC
C292
C229
0.1
NC
C242
C226
0.1
L211
NC
L212
NC
C303
10
KEYIN_5
KEYIN_4
KEYIN_3
KEYIN_2
KEYIN_1
KEYIN_4
KEYIN_3
KEYIN_2
KEYIN_1
HANDSET SP
+
+
-
+
CHARGE2
CHARGE1
POWERDOWN
RESET
HEADSET-DET
VCC
VRF
HEADSET-JACK
SP-phone
(1)
(2)
(2)
(9)
(14)
(23)
(42)
(3)
(8)
~
(10)
(13)
~
(15)
(22)
~
(24)
(28)
~
(29)
(41)
~
3.0V
3.6V
MIC INPUT
1.1KHz, -45dBm/600
1.1KHz, -45dBm/600
Ω
HEADSET Output
-17dBm (Vol. Mid)
-17dBm (Vol. Mid)
HEADSET MIC Input
1.1kHz, -45dBm/600
1.1kHz, -45dBm/600
Ω
Output
-17dBm
(Vol. Mid)
-17dBm
(Vol. Mid)
Output
-9dBm
(Vol. Max)
-9dBm
(Vol. Max)
KX-TG2238CS: SCHEMATIC DIAGRAM (HANDSET)
C1
1.0
1
2
3
5
4
6.3V 10
C2
2.6V
IC1
Small PCB
%&
KX-TG2238CS
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