Panasonic KX-TGP500B09 / KX-TPA50B09 (serv.man2) Service Manual ▷ View online
13
KX-TGP500B09/KX-TPA50B09
4.6.
Circuit Operation (Base Unit)
General Description:
(DSP, Flash Memory) is a digital speech/signal processing system that implements all the functions of speech compression, and
memory management.
The DSP system is fully controlled by a host processor DSP. The host processor provides activation and control of all that
functions as follows.
memory management.
The DSP system is fully controlled by a host processor DSP. The host processor provides activation and control of all that
functions as follows.
4.6.1.
DSP (Digital Speech/Signal Processing: IC504)
• Caller ID demodulation
The DSP implements monitor that provide CID information from the Central Office.
• Digital Switching
The voice signal from IP line is transmitted to the handset or the voice signal from the handset is transmitted to the IP line, etc.
They are determined by the signal path route operation of voice signal.
They are determined by the signal path route operation of voice signal.
• Block Interface Circuit
RF part, LED, Key scan, Ethernet interface.
• VOIP (Voice over Internet Protocol)
The voice data encoding/decoding and RTP (Real-time Transport Protocol) packet conversion are performed at the VoIP part.
14
KX-TGP500B09/KX-TPA50B09
4.6.2.
Data Flash Memory (IC501)
Following information data is stored.
• Settings
ex: message numbers, ID code, MAC address, Phone book.
4.6.3.
Program Flash Memory (IC502)
• IP-Phone Application program and config Data are stored.
4.6.4.
Power Supply Circuit
Function:
The power supply voltage from AC adaptor is converted to the desired voltage of each block.
Circuit Operation:
• IC303: 3.3 V DC DC Converter
15
KX-TGP500B09/KX-TPA50B09
4.6.5.
Reset Circuit
Function:
This circuit is used to initialize the microcomputer when it incorporates an AC adaptor.
Circuit Operation:
When the AC Adaptor is inserted into the unit, then the voltage is shifted by IC303 and power is supplied to the DSP.
The set starts to operate when VCC goes up to 3.3 V or more in the circuit voltage diagram.
The set starts to operate when VCC goes up to 3.3 V or more in the circuit voltage diagram.
Note:
• Refer to Circuit Board (Base Unit_Main) (P.117).
16
KX-TGP500B09/KX-TPA50B09
4.7.
Block Diagram (Handset)
V_PA
V_RF
V_IO
2.7 V
IC374
IC371
IC501
IC546
MIP
MIN
MIN
SPP1
LCD BACKLIGHT
SPN
BELL_LIGHT
HSM
HEADSET_DET
SPP2
SPPN
CI
CI
VCCPA
VCCA
VCC
PDN
DSP
RESET
CHG_CTL
CHG_DET
KEYSTOROBE_A~E
KEYIN_1~5
Q531
CHARGE
DETECT
DETECT
CHARGE
Q361
D361
Q362, Q364
CHARGE
CONTROL
CONTROL
RST
IC561
DC/DC
CONVERTER
CONVERTER
REGULATOR
2.7 V
IC741
REGULATOR
MIC
SP
Headset Jack
CN431
R436/R437
LED561
HEADSET
DETECT
DETECT
Monitor SP
LCD
KEYS
RF part
ANT1
ANT2
X501
13.824 MHz
Flash
Memory
Memory
BATTERY
Q561
LCD
BACK
LIGHT
BACK
LIGHT
RST
(BELL)
IC372
DC/DC
CONVERTER
CONVERTER
IC373
DC/DC
CONVERTER
CONVERTER
SYN_OUT
SYN_EN
SYN_CLK
SYN_DATA
SLOT_CTROL
RADIO_EN
TXDATA
RXDATA
RF_RSTN
RF_POWER
KX-TPA50 BLOCK DIAGRAM (Handset)
BL_LED
Q562
LED551-554
(KEY)
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