7
KX-TG9471B/KX-TG9472B/KX-TGA939T
4 Technical Descriptions
4.1.
Block Diagram (Base Unit)
R/F i/f
RF UNIT
(PQLP10293ZA)
3V
2.5V
ANT1
ANT2
D601
ANT1
ANT2
KEY/LED
(separated PCB)
LCD i/f & Backlite power
supply
relay circuit
(separated PCB)
LCD module
(103x65 dots, B/W FSTN)
LCD Backlite (separated PCB)
3V
3V
4V
FLASH Memory 8Mbits
(program)
BUS
AD1~AD15
D0~D15
Extended I/0
buffer1
Extended I/0
buffer2
IC561
IC631
IC641
FLASH MEMORY
16Mbits
(TAM)
EEPROM
(128kbits)
SPI bus
(Extended I/O)
KEY in/out
LED
I2C
IC761
TAM IC
IC701
MIC
SPEAKER
PCM i/f
USB to UART Bridge Chip
URX
UTX
Photo
coupler
Photo
coupler
IC551
IC901
IC902
SUSPEND
RESET
IC903
Photo
coupler
Photo
coupler
IC905
IC904
TX
D
RX
D
Mini USB Connector
PC
D+ D-
L2 out(TX
)
L2 in(RX
)
TP RX
TP TX
PC202 (optical isolator)
D+
D-
VBUS(5V)
Diode Bridge
Side Tone Circuit
Transformer
Transformer
+
-
T246
T241
Q231
Bell Detect
Caller ID Circuit
Diode Bridge
Side Tone Circuit
Transformer
Transformer
+
-
T146
T141
Q131
Bell Detect
Caller ID Circuit
L1out(TX
)
L1in(RX
)
LINE1
LINE2
L1 HooK
from IC641
L2 HooK
from IC 641
L1 CID
L1 Bell
L2 CID
L2 Bell
PC102
(o
p
tical isolator
)
Isolated Area from Internal circuit
IC161
IC261
D101
D201
/RESET
/SUSPEND
4V regulator
DC6.5V
500mA
F301,3A
3V
3.3
1.8
3.3V regulator
2.5V regulator
For RF only
For TAM IC only
(Audio Power)
For Source of BBIC LDO
(3.0V,1.8V)
LCD backlite LED(white)
1.8V
4V
3V
1.8V
LDO1
CTRL
LDO2
CTRL
Q381
Q386
IC341
IC321
IC331
4V
Handset Mic
Handset Speaker
Reset
IC
Q541
Reset
3.3V
Reset
Key
Interface
L1 Hook
L2 Hook
LCD I/F
LED
Reset
IC501
DSP IC
VBUS-GND
~
~
~
~
+
KX-T9471/9472 BLOCK DIAGRAM (Base Unit_Main)