Panasonic KX-TG2248S Service Manual ▷ View online
30.3. Memo
81
KX-TG2248S
31 SCHEMATIC DIAGRAM (BASE UNIT)
31.1. Main
OUT PUT -7dBm
(Vo1.Max)
(Vo1.Max)
Mic Input
1.1kHz, -50dBm/600
1.1kHz, -50dBm/600
Ω
IC201
1
LINE_SZ
2R
LY
3
CHRA
GE_CTL
4
SEG3
5
SEG4
6
SEG5
7
SEG6
8
SEG7
9
SEG8
10
SEG9
11
SEG10
12
SEG11
13
SEG12
14
VCC
15
GND
16
COM2
17
COM1
18
STB5
19
STB4
20
STB3
21
STB2
22
STB1
23
SIODO
24
SIO
ALE
25
SIOCLK
26
ANS_LED
27
BELL
28
GND
29
SPP
30
GNDP
A
31
SPN
32
VCCPA
33
NC
34
LOUT0
35
DCIN0
36
LIN0
37
LGS0
38
CIDO0
39
CIDIN0
40
CIDIP0
41
VCCA
42
DCIN1
43
GNDA
44
NC
45
VREF
46
MIN
47
MIP
48
DCIN2
49
GNDPLL
50
VCCPLL
51
XOUT
52
XIN
53
GND
54
RSTN
55
PDN
56
RST
57
VMOD
58
RXGAIN
59
SI
60
SO
61
CS
62
RSTN
63
RXEN
64
TXEN
65
SHCTRL
66
RXI
67
U
A
R
T_RX
68
U
A
R
T_TX
69
INUSE/CHARGE_LED
70
SP_LED
71
NC
72
GND
73
VCC
74
CHARGE_DET
75
TCK
76
TMS
77
TDI
78
TDO
79
79: IN_USE_LED/MESSAGE_LED/V_M_LED
80
80: DGPIO15
81 DGPIO14
82 KIN6
83 KIN5
84 KIN4
85 KIN3
86 KIN2
87 KIN1
88 DGPIO7
89 DGPIO6
90 DGPIO5
91 DGPIO4
92 DGPIO3
93 DGPIO2
94 DA
95 FLASHWP
96 GND
97 VCC
98 EEPROMWP
99 ECLK
82 KIN6
83 KIN5
84 KIN4
85 KIN3
86 KIN2
87 KIN1
88 DGPIO7
89 DGPIO6
90 DGPIO5
91 DGPIO4
92 DGPIO3
93 DGPIO2
94 DA
95 FLASHWP
96 GND
97 VCC
98 EEPROMWP
99 ECLK
100
100:USE_CNT
1K
R213
1K
R214
K0.01
C236
K0.01
C235
LGS
C234
Z0.01
C237
16V10u
SP
1K
R212
SPP1
MICM
Z0.1
C231
Z0.1
C207
Z0.1
C200
Z0.1
C213
8.192M
X200
C227
C5P
C228
C5P
TDO
TDI
TMS
TCK
URX1
UTX1
100
R200
100
R201
C201
K680P
C401
Z0.01
ANT2
ANTG1
Z0.1
C309
SI
SO
CS
IC202
NC
1
A0
2
A1
3
A2
4
VSS
5
SDA
6
SCL
7
WP
8
VCC
NC
C225
DA
WP
GND
VCC
EWP
CLK
RSTN1
PDN
0
R230
0
R231
0
R232
0
R234
NC
D200
NC
D201
NC
R243
NC
R240
NC
R242
NC
R211
NC
R210
R225
NC
C221
1K
R251
1K
R252
Z0.1
C251
Z0.1
C252
C450
6.3V100u
100P
C406
100P
C410
100P
C411
100P
C412
3.3K
R400
C453
3P
100P
C300
100P
C301
100P
C302
100P
C303
100P
C304
100P
C305
C261
3P
R261 470
R263 100
Q260
R262
100K
R260
470
C262
K0.1
C263
K0.1
C260
Z0.1
33P
C405
100P
C404
R264
1.8K
R209
ANT1
ANTG2
UTX2
URX2
SPM1
MICP
10P
C416
4.7K
RA201
1
3
5
7
8
6
4
2
6
4
2
470P
C430
1K
R433
C232
100P
C233
100P
C214
100P
C215
100P
C216
100P
C217
100P
C218
100P
C219
100P
C220
100P
C420
100P
C421
100P
SPM2
SPP2
K0.082
C723
1.2K
R216
C413
NC
L203
0
L204
0
CN100
1
VCC
2
NUSELED
3
SPLED
4
VMLED
5
ANSLED
6
KIN1
7
KIN2
8
KIN3
9
KIN4
10
KIN5
11
KIN6
12
STB5
13
STB4
14
STB3
15
STB2
16
STB1
17
COM1
18
COM2
19
SEG3
20
SEG4
21
SEG5
22
SEG6
23
SEG7
24
SEG8
25
SEG9
26
SEG10
27
SEG11
28
SEG12
29
VCC
30
GND
4.7K
R202
TAM
CDL
IC300
16M
1
RDY
2
RESET
3
WP
4
NC
5
NC
6
VCC
7
GND
8
NC
9
NC
10
NC
11
CS
12
BCLK
13
SI
14
SO
15
NC
16
NC
17
NC
18
NC
19
NC
20
NC
21
NC
22
NC
23
NC
24
NC
25
NC
26
NC
27
NC
28
NC
IO14
S501
LOCATOR
NC
4
3
390
R205
820
R206
68
R207
120
R204
1K
R235
NC
R241
RST
SYN_DATA
SYN_EN
SYN_CLK
TXMOD
RXGAIN
RXEN
TXEN
SHCTRL
RX_DATA
RSTN
RSSI
Vpow
OSC
1
2
C823
10uF
10p
C803
330
R805
NC
C812
220p
C865
2p
C867
2p
C861
4.7
R804
NC
C868
0.1uF
C820
FL801
3
1
4
2
1p
C804
IC801
1
TX
2
GND_RF
3
RX
4
VCC_RF
5
VCC_BIAS
6
REXT
7
TESTP
8
TESTN
9
VCC_IF
10
XOUT
11
XIN
12
VREG
13
VDD
14
RSSI
15
RSTN
16
RX_D
A
T
A
17
SHCNTL
18
VCC_DIG
19
VCC_PLL1B
20
VCC_PLL1A
21
TXEN
22
RXEN
23
VCC_PLL2B
24
VCC_PLL2A
25
RXGAIN
26
BCLK
27
TXMOD
28
SYN_CLK
29
SYN_EN
30
SYN_D
A
T
A
31
VDD_P
A
32
VCC_P
A
1p
C802
1uF(1608)
C830
1000p
C827
D801
2p
C858
1000p
C829
10p
C813
2.2nH
L805
NC
C832
0.1uF
C817
10
R802
1uF(1608)
C831
10p
C862
10p
C807
2p
C859
10nH
L801
TESTN
10p
C805
10
R801
TP_FREQ
C809
NC
1uH(1608)
L807
2p
C869
1000p
C828
10nH
L804
680p
C825
2p
C856
390p
C819
0.01uF
C866
C833
10uF
10p
C860
10
R803
1000p
C824
0.1uF
C818
10p
C811
2p
C857
10p
C815
1000p
C801
10nH
L806
10k(1%)
R810
(1608)
TESTP
1000p
C821
D802
2.7nH
L803
1p
C822
10p
C863
NC
C806
NC
C864
NC
C826
10p
C816
0
R300
LED201
NC
LED203
NC
NC
C835
NC
R233
NC
C306
NC
C307
4.7K
R203
3.9nH
L802
1.5p
C814
FCLK
FSI
FSO
FCS
FVCC FGND
FRST
FWP
NC
L808
NC
R811
NC
R812
NC
R813
180
R236
180
R238
180
R237
0
R245
C408
NC
C407
NC
C409
NC
10p
R806
NC
R808
NC
R807
C230
10
VMOD
RXEN
TXEN
SHCTRL
RXD
A
T
A
SO
SI
ECLK
CS
FWP
RST
DA
RSTN
KIN2
KIN3
KIN4
KIN5
STB1
STB2
STB3
STB4
STB5
COM1
COM2
SEG11
SEG8
SEG7
SEG6
SEG5
SEG3
COM2
COM1
STB5
STB4
STB3
STB2
STB1
RSSI
KIN6
KIN1
VMOD
SO
EWP
KIN1
STB1
INUSELED
SEG9
SEG10
SEG11
SEG10
SEG9
SEG8
SEG7
SEG6
SEG5
SEG3
COM2
COM1
STB1
STB2
STB3
STB4
STB5
KIN6
KIN5
KIN4
KIN3
KIN2
KIN1
ECLK
RXDATA
RXEN
RXGAIN
RSSI
RSTN
SHCTRL
ECLK
EWP
DA
EWP
DA
FWP
FWP
SI
SO
RST
RXGAIN
SEG4
SEG12
SEG4
SEG12
SI
ECLK
CS
RST
TXEN
TXEN
DATA
LE
CLK
D
ATA
CLK
LE
ANSLED
SPLED
INUSELED
INUSELED
VMLED
VMLED
SPLED
VMLED
ANSLED
CS
MIC
(1)
(8)
(12)
(7)
(6)
(5)
(4)
(3)
(2)
(13)
(14)
(15)
(14)
(15)
(22)
(21)
~
(16)
(20)
~
82
KX-TG2248S
KX-TG2248S: SCHEMATIC DIAGRAM (BASE UNIT) Main
3.3 V
Charge
Circuit
Circuit
3.3 V
3.3 V
Reset
Circuit
Circuit
3.6 V
3.6 V
6-8V
3.3 V
Bell Detect Circuit
Call ID Data
Output
Line input
1.1kHz,
-25dBm/600
1.1kHz,
-25dBm/600
Ω
CN1
1
LA
2
LB
3
9V
4
GND
33uH
L1
33uH
L2
22
POS1
SA1
D4
4
3
2
1
680p
C18
680p
C19
10M
R23
Q4
1
3
2
100K
R20
10K
R21
10K
R18
Q3
1.0M
R24
C14
K0.01
47K
R13
C9
Z0.01
R12
Q2
C7
R9
Q1
R57
0
C60
1K
R55
K0.1
C58
C53
R11
K680P/50V
C11
K680P/50V
C12
100K
R30
100K
R31
K0.15
C16
K0.15
C17
Q6
D3
K0.68
C15
4.7K
R26
NC
R28
IC331
3.6V
2
1
3
4
C110
Z0.1
Z0.1
C106
27K
R112
330K
R109
D101
6.3V330u
C103
Q151
R160
56K
10K
R159
C151
220(1/2W)
R157
15
R153
Z0.1
C150
330
R151
R150
100K
6.3V100u
C101
390K
R14
390K
R15
390K
R224
R222
33K
C244
K0.1
C242
K2700P
R223
2.2K
R221
Z0.1
C100
D202
6.3V220u
C239
Z0.01
C238
R17
47K
L200
SA2
22V
D152
22V
D153
CHGP
CHGM
DCM
R218
12K
R219
10K
Z0.1
C241
C54
R217
390K
R110
R227
2.2K
D204
D108
C115
D109
R113
LA
LB
390K
R52
NC
C51
NC
C52
NC
C56
NC
C10
NC
C243
NC
C499
C113
R8
0
1K
R10
R220
100
R51
47
Q50
R70
3.9K
NC
R16
Q150
1
3
2
120P
C245
D150
C705
6.3V220u
C415
C250
K0.047
NC
L202
Z0.1
C402
3.3u
L3
DCP
390
R152
NC
C246
C20
C13
1000P
VCC1
1.2K
R215
20V
D2
12
NC
R22
CN101
NC
1
VCC
2
GND
3
STB1
4
STB2
5
STB3
6
STB4
7
STB5
8
KIN6
9
KIN5
10
KIN4
11
KIN3
12
KIN2
13
KIN1
14
VCC
15
ANSLED
16
VMLED
17
SPLED
18
INUSELED
R105
100K
10M
R25
R27
3.3M
R29
C21
K0.01
NC
D105
D205
NC
D203
IC100
3.6V
2
3
4
1
IC101
3.3V
2
3
4
1
16V100u
C114
12
R154
12
R155
12
R156
NC
R101
D103
D102
C107
NC
TP_LCT
D5
1
2
0
R108
IC332
2.7V
5
IN
4
OUT
3
NC
2
GND
1
DS
C8
50V1u
39K
R7
K0.01
C6
C4
100P
C5
NC
R6
33(1/2W)
R5
2.0V
D1
C55
1000P
680
R2
1.2K
R1
K0.047
C3
16V10u
C1
R3
47
6.8u
L151
6.8u
L150
16V100u
C112
NC
D107
0
R19
R114
NC
NC
Q108
1
3
2
NC
C249
C111
K0.1
27K
R161
KIN1
KIN2
KIN3
KIN4
KIN5
KIN6
STB5
STB4
STB3
STB2
STB1
ANSLED
SPLED
INUSELED
VMLED
(1)
(8)
(12)
(7)
(6)
(5)
(4)
(3)
(2)
(13)
(14)
(15)
(14)
(15)
~
(22)
(21)
(16)
(20)
~
83
KX-TG2248S
31.2. Operation
RINGER
OFF
FULL
P A
GER
LCD900
1
2
3
4
5
6
7
8
9
10 11 12
LED903
ANS_LED
9
9
MEMO
MEMO
SP
SP
REC
REC
ERS
ERS
CHK
CHK
#
B
1
1
FLS
FLS
5
5
8
8
REP
REP
*
A
3
3
4
4
ICOM
ICOM
6
6
HLD
HLD
DOWN
DOWN
SKIP
SKIP
7
7
RDL
RDL
0
0
2
2
MSG1
MSG1
UP
UP
MUTE
MUTE
CN901
1
GND
2
VCC
3
SEG12
4
SEG11
5
SEG10
6
SEG9
7
SEG8
8
SEG7
9
SEG6
10
SEG5
11
SEG4
12
SEG3
13
COM2
14
COM1
15
STB1
16
STB2
17
STB3
18
STB4
19
STB5
20
KIN6
21
KIN5
22
KIN4
23
KIN3
24
KIN2
25
KIN1
26
ANS_LED
27
VM_LED
28
SP_LED
29
INUSE_LED
30
VCC
CN900
NC
1
GND
2
INUSE_LED
3
SP_LED
4
VM_LED
5
ANS_LED
6
KIN1
7
KIN2
8
KIN3
9
KIN4
10
KIN5
11
KIN6
12
STB5
13
STB4
14
STB3
15
STB2
16
STB1
17
GND
18
VCC
R900
100K
C900
100P
R901
100K
R902
100K
R903
100K
C901
100P
STOP
STOP
ANS
ANS
MSG2
MSG2
MIC
MICM
MICP
NC
C902
LED901
NC
SP_LED
LED904
NC
CIQ_LED
LED900
INUSE_LED
LED902
VM_LED
R904
0
R905
0
#1LC1H
KX-TG2248S SCHEMATIC DIAGRAM (BASE UNIT) Operation
KX-
TG224
8
S
84
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