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KX-TG7207UAJ, KX-TG7207UAM, KX-TG7207UAS, KX-TG7207UAT, KX-TG7208UAM, KX-TG7208UAS, KX-TG7208UAT, KX-TGA720UAJ, KX-TGA720UAM, KX-TGA720UAS, KX-TGA720UAT - Panasonic Telephone Service Manual (repair manual). Page 10

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10
KX-TG7207UA/KX-TG7208UA/KX-TGA720UA
4.3.
Block Diagram (Handset)
SPEAKER
RECEIVER
MIC
CHARGE
CIRCUIT
Q4,Q5,Q9
R7
CHARGE
CONTACTS
CHARGE(+)
CHARGE(-)
CHARGE
CHARGE DETECT
EEPROM
SCL
SDA
SWITCHED
SUPPLY
    Q1
Q1
BATTERY
TERMINAL
D7
VBAT1
DC/DC-SWITCH
J1
J2
2.5 V
Q3
1.8 V
Q2
3.3 V
2.5 V
1.8 V
LCD
RS
RESET
CS
SI
 SCL
CPU
Analog
Front
End
D/A
A/D
38
36
81
82
88
85
77
65
53
52
 73
69
  74
75
2
 22
23
95
98
ADPCM
Codec
Filter
DSP
Speech
Decoding
Speech
Encoding
BMC
Burst
Decoding
Burst
Encoding
RF
Interface
RF
Module
IC4
9
8
RXDA
TXDA
 5
 4
 3
SYDA
SYEN
SYCL
13
11
XTAL
X1
10.368
MHz
BATTERY
76
ON SWITCH
KEYPAD
ROWS
COLUMNS
25,47,97,100
6,7,43,44,45,95
BBIC
IC1
IC3
 24
LCD-BACK  LIGHT
KEY-BACK  LIGHT
 1
KX-TGA720 BLOCK DIAGRAM (HANDSET)
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