Panasonic KX-TG2853BXS

7
KX-TG2853BXS/KX-TG2854BXS/KX-TGA280BXS
4 Technical Descriptions
4.1. Block Diagram (Base Unit)
Analog
Front
End
To TEL_LINE
CN101
A B
Bridge
Rect
D103
Hook Switch Q104, Q105
Audio
Caller ID Interface
CPU
BELL
HOOK
Off-Hook Line Voltage
D/A A/D
ADPCM
Codec Filter
DSP
Speech Decoding Speech Encoding
BMC
Burst Decoding
Burst Encoding
RF
Interface
IC701
RXDA
ANT1 ANT2
TXDA
RSSI
SYCL SYDA SYEN
RF Module
XTAL
X1
10.368 MHz
SP-AMP
IC402
Flash
Memory
IC501
To AC Adaptor
CN301
Limit
Resistor
CHARGE CONTACT
3.45V
Reg.
IC301
3.0V
Reg.
Q2
1.8V
Reg.
Q3
3.45V
3.0V
1.8V
Bell Interface
IC1
BBIC
KX-TG2853/2854 BLOCK DIAGRAM (Base Unit)