KX-TG5511UAB, KX-TG5511UAR, KX-TGA550RUB, KX-TGA550RUR, KX-TGA551RUB, KX-TGA551RUR - Panasonic Telephone Service Manual (repair manual). Page 11

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11
KX-TG5511UA/KX-TGA550RU/KX-TGA551RU
4.3.
Block Diagram (Handset)
SPEAKER
RECEIVER
MIC
CHARGE
CIRCUIT
Q4, Q9, R7Q
4
Q
9
R
7
CHARGE
CONTACTS
CHARGE(+)
CHARGE(-)
CHARGE_CTRL
CHARGE
EEPROM
SCL
SDA
BATTERY
TERMINAL
D7
R45
VBAT
BATT+
BATT-
1.8 V
Q2Q
2
1.8 V
LCD
CD
RESET
CSB
SDA
 SCL
CPU
Analog
Front
End
D/A
A/D
33
35
15
16
19
20
32
31
57
58
 36
13
43
42
63
54
55
66
ADPCM
Codec
Filter
DSP
Speech
Decoding
Speech
Encoding
BMC
Burst
Decoding
RF PA
ANT1
IC801
Burst
Encoding
RF 
PLL
MOD/DEMOD
5
3
4
3
6
7
8
9
2
77
78
75
RXn
RXon
ANT1
DA801
RXp
TXp
TXn
Pon 
PSEL
TXon
VDD-PADRY
9
10
XTAL
X1
10.368
MHz
BATTERY
44
ON SWITCH
KEYPAD
Charge
Pump
ROWS
COLUMNS
CP3.0V
CP4.0V
48, 49, 50, 51
22, 23, 24, 25, 26
BBIC
IC1
IC3
 56
LCD-BACK  LIGHT
KEY   LED
BELL  LED
52
68
73
74
80
LDO_CTRL
KX-TGA550/551 BLOCK DIAGRAM (HANDSET)
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