Panasonic KX-TG8041RUM, Service Manual

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7
KX-TG8041RU/KX-TGA800RU
4 Technical Descriptions
4.1. Block Diagram (Base Unit)
Analog
Front
End
T
o TEL_LINE
Bridge
Rect
D3D3
Hook Switch
Q3, Q4Q3,
Q4
Audio
Bell/Caller ID
Interface
CPU
24 22 29 26 27 25 30
BELL
HOOK
Off-Hook Line Voltage
31
A/D D/A
ADPCM
Codec Filter
DSP
Speech Encoding Speech Decoding
BMC
Burst Encoding Burst Decoding
RF
PLL
5
3
97 95
9
10
EEPROM
SCL
SDA
67 68 54
66
65
64
63
16
17
15
14
85
To AC Adaptor
Limit
Resistor
Charge Detector
CHARGE CONTACT
(Optional)
VUNREG
3.0V Reg.
IC1
2.4V Reg.
Q401
1.8V Reg.
Q8
3.0 V 2.4 V
1.8 V
BBIC
IC401
FLASH MEMORY
(TAM)
IC421
TAM Companion IC
MIC SP
IC201
IC7
MOD/DEMOD
Charge
Pump
53
2.5V
X
T
A
L
X
1
X1
10.3
68
M
H
z
IC801
R
X
n
R
X
p
T
X
p
T
X
n
P
on
P
S
E
L
V
DD
-P
A
D
R
V
4 3 6 7
T
X
on
R
X
on
D
801
D802
6
92
AN
T1
AN
T2
9 8
AN
T1
AN
T2
R
F
P
A
AN
T1
ANT2
98 93 94
100
L
1
L
2
L
1
L2
2
1
91
0
1
1
1
2
2
3
CE
SPI_DI
SPI_DO
SPI_CLK
SPI_EN
RST
SCK SI SO
6 5
14 16
27
31
2
KX-TG
80
41 BLOCK DIA
GRAM
(BASE UNIT)