Read Panasonic KX-TG5521RUB / KX-TGA551RUB Service Manual online
7
KX-TG5521RUB/KX-TGA551RUB
4 Technical Descriptions
4.1.
Block Diagram (Base Unit)
Analog
Front
End
To TEL_LINE
Bridge
Rect
D3 D
3
Hook Switch
Q3 ,Q4 ,Q5Q
3
,
Q
4
,
Q
5
Audio
Bell/Caller ID
Interface
CPU
18
16
23
20
21
19
24
BELL
HOOK
Off-Hook Line Voltage
25
A/D
D/A
ADPCM
Codec Filter
DSP
Speech Encoding
Speech Decoding
BMC
Burst Encoding
Burst Decoding
RF
PLL
5
3
77
75
9
10
EEPROM
SCL
SDA
57
58
44
To AC Adaptor
Limit
Resistor
Charge
Detector
CHARGE
CONTACT
(Optional)
IC2IC
2
Q9Q
9
Q8Q
8
2.4V
Reg.
1.8V
Reg.
3.0 V
2.4 V
1.8 V
BBIC
IC401
IC7
KX-TG5521 BLOCK DIAGRAM
(BASE UNIT)
MOD/DEMOD
Charge
Pump
43
2.5V
XTAL
X1X
1
10.368
MHz
IC801
RX
n
RX
p
TX
p
TX
n
P
on
PSEL
V
DD
-PADRV
4
3
6
7
TX
on
RX
on
D801
6
72
ANT1
ANT2
9
8
ANT1
ANT2
RF PA
ANT1
ANT2
78
73
74
80
L1
L2
DCP
DCM
2
FLASH MEMORY
IC421
42
3.0V
54
55
55
56
53
53
TAM-CSn
SPI-DI
SPI-DO
SPI-DO
SPICLK
IC3IC
3
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