Panasonic KX-TG8421BX, Руководство по обслуживанию

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2
KX-TG8421BX/KX-TGA840BX
1 Technical Descriptions
1.1. Block Diagram (Base Unit)
Analog
Front
End
To TEL_LINE
Bridge
Rect
D3D3
Hook Switch
Q4,Q5
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)
VUNREG
3.0V Reg.
IC1
2.4V Reg.
Q9
1.8V Reg.
Q8
3.0 V 2.4 V
1.8 V
BBIC
IC401
IC7
MOD/DEMOD
Charge
Pump
43
2.5V
XTAL
X1X1
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
L1 L2
2
FLASH MEMORY
IC421
42
3.0V
54
55
56
53
TAM-CSN
SPI-DI
SPI-DO
SPICLK