Read Panasonic KX-TG7175RUS / KX-TGA717RUS Service Manual online
7
KX-TG7175RUS/KX-TGA717RUS
4 Technical Descriptions
4.1.
Block Diagram (Base Unit)
KX-TG7175 BLOCK DIAGRAM
(BASE UNIT)
Analog
Front
End
To TEL_LINE
A
B
CN1
Bridge
Rect
D3 D3
Hook Switch
Q
4
,Q
5
Audio
Bell/Caller ID
Interface
Analog
Switch
CPU
59
54
61
52
60
56
55
BELL
HOOK
Off-Hook Line Voltage
64 ADCO
D/A
A/D
ADPCM
Codec Filter
DSP
Speech Decoding
Speech Encoding
BMC
Burst Decoding
Burst Encoding
RF
Interface
18
19
TXDA
RXDA
15
21
20
22
RSSI
SYCL
SYDA
SYEN
ANT1
ANT2
RF Module
18
16
2
31
8
21
14
13
12
12
13
XTAL
X
1
10.368
MHz
EEPROM
SCL
SDA
6
5
To AC Adaptor
CN2
Limit
Resistor
CHARGE
CONTACT
VUNREG
3.3V
Reg.
IC
1
2.5V
Reg.
Q
9
1.8V
Reg.
Q
8
3.3V
2.5V
1.8V
BBIC
IC5
IC7
IC10
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