Panasonic KX-TG2448BXF, Service Manual

Page: 87 / 98

SPP
CN331
HEADSET_JACK
1
GND
2
MIC1
3
MIC2
4
SP2
5
SP1
SPM
VBAT1
K0.1
C222
VSS1
220K
R223
22K
R222
EEPROM(64K)
1
A0
2
A1
3
A2
4
VSS
5
SDA
6
SCL
7
WP
8
VCC
K0.01 C333
10K
R331
K0.1
C306
10M
R377
RST
10K
R234
PDN
13.824MHz
X201
C377
K0.1
C215
K0.1
TCK
TMS
TDI
TDO
R333 1K
NC
C322
C206
K0.1
2.2M
R376
K0.01 C221
Q361
47K
R361
C335 6V22
47K
R363
NC
C336
R201 NC
K0.1
C224
NC
R224
2.2V RESET
OUT
1
VDD
2
NC
3
GND
4
C371
K1.0
270K
R243
NC
R354
C214
1
0
NC
C361
L211
NC
Q331
R209 100K
TX
UART
RX
Q231
NC
C312
MICP
C317 6V22
MICM
C311
NC
NC
C313
NC
R351
C307
NC
C304
NC
C211
6.3V330
C209
NC
Q363
NC
R232
K0.1
C231
D231
NC
R231
22K
NC
C244
R312
2.2K
1.0 C303
NC
R352
C223
NC
K0.1
C225
1K
R225
K0.1
C241
1K R242
10K R241
C242
J100P
L334
L331
L332
NC
C334
NC
C332
L327
L326
K0.01
C305
K0.01
C212
K0.01
C353 C354
NC
VBAT2
VSS2
MIC
CHG1
CHG2
BATTP
+
BATTM
-
1
1.GNDPA
2
SPOUTP
3
BCLK
4
RSSI
5
XIN
6
XOUT
7
VDD
8
VCCIN
9
GND
10
DCDCGND
11
DCDCIN
12
DCDCOUT
13
RSTN
14
FLASH_RESET
15
FLASH_DO
16
FLASH_DI
17
FLASH_CS
18
BGPIO6
19
SERIAL_DI
20
TXO
21
MOD_EN
22
BGPIO11
23
BGPIO12
24
RF_RESET
25
25.BGPIO15
26 SHCTRL
27 CGPIO4
28 GND
29 VCC
30 SERIAL_LE
31 SERIAL_CLK
32 SERIAL_DATA
33 RXEN
34 TXEN
35 RXGAIN
36 RXDATA
37 DGPIO10
38 CHG_DET
39 OSC_BUF
40 EEPROM_DET
41 DGPIO6
42 DGPIO5
43 DGPIO4
44 LCD_DB7
45 LCD_DB6
46 LCD_DB5
47 LCD_DB4
48 GND
49 VCC
50
50.LCD_RESET
51
FLASH_CLK
52
AGPIO1
53
TALK_LED
54
VE_LED
55
BAT_LED
56 57
LCD_CS LCD_WR
58
LCD_RD
59
LCD_POWER_CTRL
60
ANT_LED
61
KEY_BL
62
EGPIO6
63
STB_E
64
STB_D
65
STB_C
66
STB_B
67
STB_A
68
GND
69
VCC
70
TCK
71
TMS
72
TDI
73
TDO
74
KIN_1
75
KIN_2
76
76.KIN_3
77 KIN_4
78 KIN_5
79
AGPIO0
80 CHG_CTRL
81
EEPROM_SCL
82 EEPROM_SDA
83 UART_TX
84
UART_RX
85 EEPROM_WP
86 GND
87
PDN
88 IBAT
89
VREF
90 MIP
91 MIN
92
MIC_PWR
93 GNDA
94
VCCA
95 HEADSET_MIN
96 HEADSET_DET
97
HSSPOUTN
98 HSSPOUTP
99 VCCPA
100 SPOUTN
C243
NC
6.3V330
C373
D361
2.0V RESET
OUT
1
VDD
2
NC
3
GND
4
10 R208
R205 NC
R207 NC
R206 NC
R228
NC
NC
R230
C205
NC
RA201
4.7K
1 3 5 78
6 4 2
L351
NC
L352
NC
2.2K
R318
2.2K
R334
NC
R332
NC
R325
K0.1
C226
220K R227
C372
K1.0
NC
R364
C227 K0.1
K0.01
C340
0
R340
3.3K R368
C208 10
Q243
D373
47 H L373
Q373
G
S
D
2.6V REG
1
NC
2
VSS
3
CE
4
VIN
5
VOUT
R317 100
DC/DC
1
VOUT
2
VDD
3
ON/OFF
4
VSS
5
EXT
1K
R362
NC R366
NC R367
NC
D326
NC
D327
NC
D312
NC
D313
NC
D324
NC
D323
R226
27K
D223
C201
C6P
C202
C6P
Q362
Q221
18
R323
18
R324
C314
K0.018
C315
K0.018
2.2K
R314
2.2K
R315
C316
K0.015
C321
6V2.2
KIN_5 KIN_4 KIN_3 KIN_2 KIN_1 STB_A STB_B STB_C STB_D STB_E
HANDSET SP
+
-
+
POWERDOWN
RESET
VCC
HEADSET-DET
2.6V
CHARGE_DET
SP-Phone
-
2.6V
DC/DC_OUT
(1)
(7)
(8)
(9)
(10)
(11)
(12)
(13)
(14)
(15)
(16)
(17)
(18)
(19)
(20)
(21)
(22)
(23)
(24)
(25)
(26)
(27)
(28)
(29)
(30)
(31)
(38)
(37)
(39)
(40)
(41)
(42)
(43)
(44)
(45)
(46)
(47)
(32)
(33)
(34)
(35)
(36)
(6)
(5)
(4)
(3)
(2)
KX-TGA254 SCHEMATIC DIAGRAM (Handset_Main)
NC: No Components
IC241
IC221
IC201
IC374
IC371
IC373
24ms
Power ON
(Reset)
Handset TX
-33dBm/600 IN
88mVp-p
SP phone TX
-43dBm/600 IN
30mVp-p
SP phone RX
(MIC Mute: ON)
1.8Vp-p/8
(Vol. MAX)
Handset RX
(MIC Mute: ON)
590mVp-p/150
(Vol. MAX)
3.0V
2.3~2.9V
Headset RX
170mVp-p/150
(Vol. MAX)
Headset TX
-37dBm/600
IN
50mVp-p
TEST SIGNAL
FREQUENCY:1KHz
87
KX-TG2448BXF / KX-TG2448B XS / KX-TGA254BXF / KX-TGA254BXS