Block Diagram (Handset) - Panasonic KX-A144 Series Service Manual

22 BLOCK DIAGRAM (HANDSET)

SPEAKER
EARPIECE
MIC
+
TP5
CHARGE
CHARGE
CONTACTS
CIRCUIT
TP6
TP3
BATTERY
SWITCHED
TERMINAL
SUPPLY
TP4
4.0V
LCD
14 Seg
Display
AMP
IC101
CHARGE
CHARGE DETECT
6 SCL
EEPROM
IC2 5 SDA
VDDBAT
SWITCH
D3
VDDLR
pin 2, 5~9
COM 0~5
segment 0~29
pin1, 90~100, 87, 78~84,
72~76, 61, 62, 56~58
KX-TCD440HGS / KX-TCD440HGT / KX-A144EXS-1 / KX-A144EXS / KX-A144EXT-1 / KX-A144EXT
Speech
42
Decoding
D/A
41
Speech
46
Encoding
45
A/D
ADPCM
Codec
Analog
Filter
Front
End
DSP
38
27
67
66
36
28
CPU
37
KX-A144EXS/EXT-1/A144EXS/EXT BLOCK DIAGRAM (HANDSET)
57
Burst
12 RXDA
Decoding
16 TXDA
Burst
Encoding
48 RSSI
RF
23 SYRI
Interface
13
SYEN
BMC
33 XTAL
10.368
MHz
31
ON SWITCH
26
34
53~55, 59, 60
ROWS
17~21
COLUMNS
88
LCD BACK LIGHT
KEY BACK LIGNT
IC1
52
SP-Phone LED
BBIC
ANT
20
4
RF
Module
5
IC3
13
10