Read Panasonic KX-TG8521RUB / KX-TG8522RUB / KX-TGA850RUB Service Manual online
7
KX-TG8521RUB/KX-TG8522RUB/KX-TGA850RUB
4 Technical Descriptions
4.1.
Block Diagram (Base Unit)
Analog
F
ront
End
T
o
TEL_LINE
Br
idge
Rect
D D
3
Hook Switch
Q4,QQ
4
,Q
5
A
u
dio
Bell/Caller ID
Interf
ace
CPU
18
16
2
3
20
21
19
24
BELL
HOOK
Off-Hook Line
V
oltage
25
A/D
D/A
ADPCM
Codec Filter
DSP
Speech Encoding
Speech Decoding
BMC
B
u
rst Encoding
B
u
rst Decoding
RF
PLL
5
3
77
75
9
10
EEPR
OM
SCL
SD
A
57
58
44
T
o
A
C
Adaptor
Limit
Resistor
Charge
Detector
CHARGE
CONT
A
C
T
ICIC
2
Q
9
Q
8
2.4V
Reg.
1.8V
Reg.
3
.0 V
2.4 V
1.8 V
BBIC
IC401
IC7
KX-TG8521/8522 BLOCK DIA
GRAM
(BASE UNIT)
MOD/DEMOD
Charge
P
u
mp
4
3
2.5V
XT
AL
X
1
10.
3
68
MHz
IC801
RX
n
RX
p
TX
p
TX
n
P
on
PSEL
V
DD
-P
ADR
V
4
3
6
7
TX
on
RX
on
D801
6
72
ANT1
ANT2
9
8
ANT1
ANT2
RF P
A
ANT1
ANT2
78
7
3
74
80
L1
L2
DCP
DCM
2
FLASH MEMOR
Y
IC421
42
3
.0V
54
55
55
56
53
53
T AM-CSn
SPI-DI
SPI-DO
SPI-DO
SPICLK
ICIC
3
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