Panasonic KX-TG7225RUJ / KX-TG7225RUM / KX-TG7225RUS / KX-TG7225RUT / KX-TG7226RUS / KX-TG7226RUT / KX-TGA721RUJ / KX-TGA721RUM / KX-TGA721RUS / KX-TGA721RUT Service Manual ▷ View online
69
KX-TG7225RU/KX-TG7226RU/KX-TGA721RU
12 Schematic Diagram
12.1. For Schematic Diagram
12.1.1. Base Unit (Schematic Diagram (Base Unit))
Notes:
1. DC voltage measurements are taken with voltmeter from the negative voltage line.
2. The schematic diagrams may be modified at any time with the development of new technology.
12.1.2. Handset (Schematic Diagram (Handset))
Notes:
1. DC voltage measurements are taken with an oscilloscope or a tester with a ground.
2. The schematic diagram may be modified at any time with the development of new technology.
2. The schematic diagram may be modified at any time with the development of new technology.
12.1.3. Charger Unit (Schematic Diagram (Charger Unit))
Notes:
1. DC voltage measurements are taken with voltmeter from the negative voltage line.
2. The schematic diagram may be modified at any time with the development of new technology.
70
KX-TG7225RU/KX-TG7226RU/KX-TGA721RU
12.2. Schematic Diagram (Base Unit)
TX_AF
TX DATA
RX DATA
0 V
2.5 V
10.368 MHz
3.3 V
Beep/Bell signal
Q5
3
2
1
+2.5V
+3.3V
C101
NC
R102
NC
R103
NC
NC
R110
NC
NC
R112
1k
+2.5V
D10p
C118
C122
NC
DA1
1
2
3
L5
NC
NC
ANT_1
ANT_2
R109
180
C125
D10p
D10p
10k
R98
10k
R99
R63
2.2k
+2.5V
C50
K0.01u
+2.5V
+1.8V
+2.5V
SP+
SP-
+3.3V
330
R91
0
R88
2.2k
R62
K0.1u
C84
1k
R92
TP10
ANT
A_1
A_2
CN5-1
GND
CN5-6
ROW0
CN5-3
ROW1
CN5-4
ROW2
CN5-5
KEY0
CN5-10
KEY1
CN5-9
LED1
CN5-8
VDD
CN5-7
LED2
CN5-2
GND
12
R21
27
R22
K1u
C22
C102
NC
*C16
NC
C17
K2.2u
K0.1u
*C28
L4
NC
NC
CN5
1
GPIO4/
PCM_DI
2
GPIO5/PCM_DO
9
SPI_DI
3
GPIO6/PCM_CLK
4
GPIO7/PCM_FSC
5
VDD1
6
VDDIO1
7
CLK
8
*PF
10
SPI_DO
11
SPI_CLK
12
SPI_EN
13
AVD1
14
GPO9/PAOUTp
15
VDDPA
16
GPO8/PAOUTm
17
GPIO0
18
GPIO1
19
VDD2
20
VDDIO2
21
GPIO2
22
GPIO3
23
*RST
24
A
VD2
25
*LSR
26
LSRp
27
MICh
28
*MIC
29
VREFm
30
VBUF
31
MICp
32
VREFp
33
Fin
270
R120
R101
NC
R115
NC
0
R114
+3.3V
Q21
1
E1
2
B1
3
C2
4
E2
5
B2
6
C1
+3.3V
0
R122
D14
A
K
D13
A
K
D9
AK
Q24
NC
B
C
E
NC
R132
R118
NC
180
R106
C158
NC
SP-
SP+
50V 10u
C27
100k
R23
+2.5V
*C25
0.047u
0.047u
Q25
390k
R141
47k
R134
27k
R18
8.2k
R19
100k
R27
470k
R28
C24
NC
100k
R82
C14
K4700p
0
RA1
1
2
3
4
5
6
7
8
C159
NC
NC
+1.8V
1
GND1
2
ANT2
3
VCCPA
4
GND2
5
GND3
6
VDD_ANA
7
VDD_DIG
8
GND4
9
SYRI
10
GND5
11
GND6
12
SYEN
13
SYD
A
14
SYCL
15
GND7
16
RXD
A
17
GND8
18
TXDA
19
GND9
20
*RESET
21
ANT1
22
GND10
23
GND13
24
GND12
25
TXPO-SET
26
GND14
27
GND15
28
GND16
29
GND17
30
GND18
31
A_1
32
GND11
R142
NC
R143
NC
R144
NC
+2.5V
+2.5V
C23
K0.22u
C51
K0.1u
C80
K0.1u
C81
K0.1u
C82
K0.1u
C83
K0.1u
C85
K0.1u
C89
K0.1u
NC
C88
NC
C90
C111
NC
C114
NC
C116
NC
NC
C129
NC
C132
NC
C144
NC
NC
C155
C113
NC
C115
NC
C131
NC
C119
NC
C121
NC
NC
C130
NC
J150p
C126
K1n
C127
C133
K0.1u
C141
K0.22u
C161
NC
C109
NC
1n
C92
1n
C93
1n
C94
1n
C95
C103
D10p
1n
C142
C160
K100p
C106
D10p
100p
C91
NC
C104
NC
C148
NC
C147
L21
J22p
1.5n
L7
C162
C3p
500mW
1
R125
C124
D7p
D7p
D7p
C117
C163
NC
NC
100
R116
330
R111
Q10
NC
B
E
C
LOW_RAD
270
R119
C112
J22p
J22p
D10p
C110
K390p
C128
C108
M4.7u
M4.7u
*C15
K1u
47k
*R24
*C18
NC
1
A0
2
A1
3
A2
4
GND
5
SDA
6
SCL
7
WP
8
VCC
VJ1
1
SI
2
SCK
3
*RESET
4
*CS
5
*WP
6
VCC
7
GND
8
SO
120
R29
470
*R30
820
*R31
2.2k
*R20
100
R131
D10p
C146
D10p
C145
SK
TDO
RESET
LE
TAMIC_CSn
SPICLK
SPIDI
SPIDO
MESSAGE
TAM_RSTn
SPICLK
SPIDO
SPIDO
TAM_CSn
SPIDI
KEY0
KEY1
TAM_RSTn
ROW2
ROW1
ROW1
TAM_CLK
RDI
SIO
ANSWER_ON
WP
TAM_RSTn
WP
ROW0
RFCLK
LOW_RAD
Flat-cable
IC8
RF UNIT
IC10
IC11
Flash memory
EEPROM
*IC5
(1)
(2)
(3)
(4)
(5)
(8)
(9)
(11)
(10)
(6)
(7)
NC: No Components
71
KX-TG7225RU/KX-TG7226RU/KX-TGA721RU
Charge Current
Bell signal
RX_AF
TX_AF
Caller ID,
Bell Signal
Bell Signal
Loop Current
0 V
0.7 V
TX DATA
RX DATA
25 mV p-p
1.8 V
2.5 V
3.3 V
L2R
J1
NC
J2
NC
L1
33u
L2
33u
K680p
C9
K680p
C10
D3
4
1
3
2
R123
NC
100k
R14
2.7k
R15
LINE_DC
SA1
*D15
12
*D16
1
2
CLK
R1
10k
1500p
C3
1M
R4
C5
K1000p
1500p
C4
1M
R6
R5
180k
C6
K1000p
R7
NC
100k
R8
+2.5V
R9
NC
100k
R10
1
*INT1/P11
2
VDDIO1
3
VDD1
4
VSS1
5
SDA1/P25
6
SCL1/P24
7
*INT5/VDDE/P15
8
*INT2/P12
9
AVD
10
AVS
11
CAP
12
Xtal1
13
VSSRF
14
RFCLKp
15
RSSI/RFCLKm
16
VDDRF
17
RFCLKd
18
TDO
19
RDI
20
SK
21
PD1/SIO
22
LE
23
P31/PD1
24
P32/PD2
25
P33/PD3
26
P34/PD4
27
TDOD/P35/PD5
28
P36/PD6
29
VSS2
30
VDDIO2
31
VDD2
32
PCM_FSC/*INT0/P10
33
P00/UTX
34
P01/URX
35
P02/JTIO
36
P03/SDA2
37
P04/SCL2
38
P05/SPICLK/PCM_CLK
39
P06/SPIDO/PCM_DOUT
40
P07/SPIDI/PCM_DIN
41
VSS3
42
VDD3
43
P23/ADC1
44
P17/CHARGE/INT7
45
*RST
46
VBAT1
47
LDO1_CTRL
48
LDO2_CTRL
49
LDO1_
Sense
50
A
VS2
51
A
VD2
52
*CIDIN
53
*LSR/REF
54
LSRp/REF
55
RINGING
56
*MIC/CIDOUT
57
VREFm
58
A
GND
59
MICp
60
CIDINp
61
P14/*INT4
62
P13/*INT3
63
ADC2
64
ADC0
J101
J104
J103
J102
R76
1k
R81
3.3k
K0.1u
C56
+1.8V
D12
15
R72
VDD1
+2.5V
VDD2
VDD3
+3.3V
120
R38
200
R39
4
Fin
1
ADJ/GND
3
Input
2
Output
+8.0V
DCM
1k
R79
1k
R80
L2T
L1T
L1R
CN2
2
1
NC
C30
CN1
1
2
3
4
2
3
4
5
6
K1u
C70
SA2
NC
NC
D1
1
2
3.3M
R73
100
R75
TP23
10k
R74
TP9
TP_RLY1
L1T/TP_RLY2
L2T/TP_RLY3
L1R/TP_RLY4
L2T/TP_RLY3
L1R/TP_RLY4
TP_RLY5
*D4
20V
12
10k
R77
10k
R78
C37
NC
3.3k
R71
3.3k
R117
1k
R33
0
R97
R3
180k
C31
K2.2u
Q4
1
3
2
Q3
B
C
E
J11
NC
SA11
NC
2
1
NC
SA12
2
1
NC
D2
A
K
D5
NC
A
K
D6
NC
NC
AK
D21
NC
AK
Q1
NC
NC
B
C
E
D22
22V
D23
R126
NC
Q22
NC
R127
NC
Q23
NC
NC
R128
+2.5V
10k
R129
1k
R130
TP16
TP15
330u
C36
6.3V
C32
100u
16V
16V 10u
C71
10u
C64
16V
NC
SW1
1
2
R138
NC
R140
NC
NC
D24
AK
NC
D25
AK
C7
NC
C8
NC
R139
NC
PCM_FSC
PCM_CLK
PCM_DOUT
PCM_DIN
DCP
10k
R16
100k
R32
100k
R34
1k
R35
J220p
C52
J220p
C53
0
L22
C1
10p
C48
NC
NC
C54
K22n
C55
K0.1u
C57
NC
NC
C59
K0.1u
C60
K0.1u
C61
K0.1u
C65
K1u
C73
K0.1u
C74
K0.1u
C75
K0.1u
C68
K1u
D10p
C69
D10p
C136
D10p
C137
K0.22u
C72
C156
NC
NC
K1n
C157
K1n
C96
X1
1
3
2
L9
390
C67
K0.1u
TP16-sub
TP15-sub
1W
3.9
R55
1W
3.9
R56
1W
3.3
R57
CHARGE
US1
*D26
NC
AK
*Q2
1
3
2
10
*R124
*R13
680
*R12
10k
Q8
Q9
B
E
C
R148
NC
12
R133
C62
22p
P1
0
*R36
150k
2.2k
*R17
*C12
NC
3A
F1
C63
8p
D10p
C164
D10p
C165
NC
*C2
*R2
NC
NC
*C166
TAM_CSn
TAMIC_CSn
SPIDI
SPIDO
SPICLK
TAMIC_CSn
RO
W
0
RESET
LE
SIO
SK
RDI
TDO
RFCLK
LO
W_RAD
TAM_CLK
RO
W
1
RO
W
2
KEY0
KEY1
WP
RO
W
0
Charge +
Charge -
DC_IN
GND
JTAG
RX
TX
for NL
for JT
for BR
for BR
IC1
IC7
BBIC
(1)
(2)
(3)
(4)
(5)
(8)
(9)
(11)
(10)
(6)
(7)
NC: No Components
KX-TG7225/7226RU
SCHEMATIC DIAGRAM (Base Unit_Main)
72
KX-TG7225RU/KX-TG7226RU/KX-TGA721RU
12.3. Schematic Diagram (Base Unit_Operation)
C
LED2
ANS_ON
1
2
C
STOP
1
2
ERASE
1
2
LOCATOR
1
2
GND
VDD
LED2T
ANS_ON
1
2
CN10-1
CN10-2
CN10-6(ROW0)
CN10-7(LED1)
CN10-8(VDD)
CN10-9(LED2)
CN10-10(KEY1)
CN10-4(ROW2)
CN10-3(ROW1)
CN10-5(KEY0)
SKIP
1
2
REPEAT
1
2
VOL_UP
1
2
VOL_DOWN
1
2
PLAY
1
2
LED1T
PLAY
LED1
1
2
KX-
TG7225/7226
SCHEMATIC DIAGRAM (Base Unit_Operation)
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