Panasonic KX-TG7227UAJ / KX-TG7227UAM / KX-TG7227UAS / KX-TG7227UAT / KX-TG7228UAS / KX-TG7228UAT / KX-TGA721RUM / KX-TGA721RUS / KX-TGA721RUT / KX-TGA721UAJ / KX-TGA721UAM / KX-TGA721UAS / KX-TGA721UAT Service Manual ▷ View online
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KX-TG7227UA/KX-TG7228UA/KX-TGA721RU/KX-TGA721UA
11.8. How to Check the Handset Speaker or Receiver
1. Prepare the digital voltmeter, and set the selector knob to ohm meter.
2. Put the probes at the speaker terminals as shown below.
2. Put the probes at the speaker terminals as shown below.
11.9. Frequency Table (MHz)
Note:
Channel No. 10: In the Test Mode on Base Unit and Handset.
BASE UNIT
HANDSET
Channel No
Transmit Frequency
Receive Frequency
Transmit Frequency
Receive Frequency
1
1897.344 1897.344 1897.344 1897.344
2
1895.616 1895.616 1895.616 1895.616
3
1893.888 1893.888 1893.888 1893.888
4
1892.160 1892.160 1892.160 1892.160
5
1890.432 1890.432 1890.432 1890.432
6
1888.704 1888.704 1888.704 1888.704
7
1886.976 1886.976 1886.976 1886.976
8
1885.248
1885.248
1885.248
1885.248
9
1883.520 1883.520 1883.520 1883.520
10
1881.792 1881.792 1881.792 1881.792
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KX-TG7227UA/KX-TG7228UA/KX-TGA721RU/KX-TGA721UA
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.
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KX-TG7227UA/KX-TG7228UA/KX-TGA721RU/KX-TGA721UA
Memo
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KX-TG7227UA/KX-TG7228UA/KX-TGA721RU/KX-TGA721UA
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
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