Panasonic KX-TGJ310RU / KX-TGJ312RU / KX-TGJ320RU / KX-TGJ322RU / KX-TGJA30RU Service Manual ▷ View online
9
KX-TGJ310/KX-TGJ312/KX-TGJ320/KX-TGJ322/KX-TGJA30
4.2.
Block Diagram (Base Unit_RF Part)
ANT
SW
TXp
TXn
RXp
RXn
ANT1
ANT2
10
KX-TGJ310/KX-TGJ312/KX-TGJ320/KX-TGJ322/KX-TGJA30
4.3.
Circuit Operation (Base Unit)
General Description:
(BBIC, Flash Memory) is a digital speech/signal processing system that implements all the functions of speech compression,
record and playback, and memory management required in a digital telephone answering machine.
The BBIC system is fully controlled by a host processor. The host processor provides activation and control of all that functions
as follows.
record and playback, and memory management required in a digital telephone answering machine.
The BBIC system is fully controlled by a host processor. The host processor provides activation and control of all that functions
as follows.
4.3.1.
BBIC (Base Band IC: IC501)
• Voice Message Recording/Play back
The BBIC system uses a proprietary speech compression technique to record and store voice message in Flash Memory.
An error correction algorithm is used to enable playback of these messages from the Flash Memory.
An error correction algorithm is used to enable playback of these messages from the Flash Memory.
• DTMF Generator
When the DTMF data from the handset is received, the DTMF signal is output.
• Synthesized Voice (Pre-recorded message)
The BBIC implements synthesized Voice, utilizing the built in speech detector and a Flash Memory, which stored the vocabulary.
• Caller ID demodulation
The BBIC implements monitor and demodulate the FSK/DTMF signals that provide CID information from the Central Office.
• Digital Switching
The voice signal from telephone line is transmitted to the handset or the voice signal from the handset is transmitted to the
Telephone line, etc. They are determined by the signal path route operation of voice signal.
Telephone line, etc. They are determined by the signal path route operation of voice signal.
• Block Interface Circuit
RF part, LED, Key scan, Speaker, Telephone line.
4.3.2.
Flash Memory (IC601)(for KX-TGJ320 only)
Following information data is stored.
• Voice signal
ex: Pre-recorded Greeting message, Incoming message
4.3.3.
FLASH MEMORY (IC502)
Following information data is stored.
• Program
ex: message numbers, ID code, Flash Time, Tone/Pulse
RF part
ADPCM
Analog
Front
End
Front
End
&
Multi-
plexer
Multi-
plexer
TEL
Line
Interface
Line
Interface
Digital
Speech
Processor
Speech
Processor
Caller ID
Modem
Modem
Digital TAM System
Flash Memory (TAM) IC601
Host CPU
BBIC (IC501)
TDD & TDMA
with FHSS
Processor
with FHSS
Processor
ADPCM
Flash Memory
(PROGRAM) IC502
(PROGRAM) IC502
KEY LED *1
*1 for KX-TGJ320 only
*1
*1
SP *1
MIC *1
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KX-TGJ310/KX-TGJ312/KX-TGJ320/KX-TGJ322/KX-TGJA30
4.3.4.
Power Supply Circuit/Reset Circuit
The power supply voltage from AC adaptor is converted to VBAT (3.0V) in IC302. And +3.0V for peripherals and analog part is
insulated from VBAT by Doubler of BBIC.
Circuit Operation:
insulated from VBAT by Doubler of BBIC.
Circuit Operation:
5.5V
VBAT
RSTN(Reset)
pin 71
VBAT
pin 10
pin 14
VDD5
IC501
IC302
IC601
BBIC
DOUBLER OUT
For peripherals
For peripherals
VDD1 (1.8V)
AC Adaptor
3.0V
REGULATOR
FLASH
IC502
FLASH
+3.0V
STM
RF Part
LED
7seg LED
1.8 V (VDD1)
VBAT (VDD3)
RSTN
pin 71
pin 71
BBIC chip initialize
STM
pin 14
VDD3
(for TGJ32x only)
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KX-TGJ310/KX-TGJ312/KX-TGJ320/KX-TGJ322/KX-TGJA30
4.3.4.1.
Charge Circuit
The voltage from the AC adaptor is supplied to the charge circuits.
R372
R371
F301
DCP
+5.5V
CHARGE-
CHARGE+
DCM
D362
C351
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