8
KX-TG8421E/KX-TG8422E/KX-TG8423E/KX-TG8424E/KX-TGA840E
4.2.
Circuit Operation (Base Unit)
4.2.1.
Outline
Base Unit consists of the following ICs as shown in
Block Diagram (Base Unit)
(P.7).
• DECT BBIC (
B
ase
B
and IC): IC7
- Handling all the audio, signal and data processing needed in a DECT base unit
- Controlling the DECT specific physical layer and radio section (
B
urst
M
odule
C
ontroller section)
- ADPCM code filter for speech encoding and speech decoding (DSP section)
- Echo-cancellation and Echo-suppression (DSP section)
- Any tones (tone, sidetone, ringing tone, etc.) generation (DSP section)
- DTMF receiver (DSP section)
- Clock Generation for RF Module
- ADC, DAC, timer, and power control circuitry
- PLL Oscillator
- Detector
- Compress/Expander
- First Mixer
- All interfaces (ex: RF Power Amp, EEPROM, LED, Analog Front End, etc.)
• RF Power Amp.: IC801
- Amplifier for transmission and reception
• EEPROM: IC401
- Temporary operating parameters (for RF, etc.)
• FLASH MEMORY: IC421
- Voice Prompt (TAM) D/L Area
- ICM/OGM Recording Area
• Additionally,
- Power Supply Circuit (+3.0 V, +2.4 V, +1.8 V output)
- Crystal Circuit (10.368 MHz)
- Charge Circuit
- Telephone Line Interface Circuit
Содержание KX-TG8421EB
Страница 2: ...2 KX TG8421E KX TG8422E KX TG8423E KX TG8424E KX TGA840E ...
Страница 14: ...14 KX TG8421E KX TG8422E KX TG8423E KX TG8424E KX TGA840E 4 6 Signal Route ...
Страница 15: ...15 KX TG8421E KX TG8422E KX TG8423E KX TG8424E KX TGA840E ...
Страница 24: ...24 KX TG8421E KX TG8422E KX TG8423E KX TG8424E KX TGA840E 7 5 Troubleshooting ...
Страница 25: ...25 KX TG8421E KX TG8422E KX TG8423E KX TG8424E KX TGA840E ...
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Страница 27: ...27 KX TG8421E KX TG8422E KX TG8423E KX TG8424E KX TGA840E ...
Страница 29: ...29 KX TG8421E KX TG8422E KX TG8423E KX TG8424E KX TGA840E 8 Service Mode 8 1 Engineering Mode 8 1 1 Base Unit ...
Страница 31: ...31 KX TG8421E KX TG8422E KX TG8423E KX TG8424E KX TGA840E 8 1 2 Handset ...
Страница 40: ...40 KX TG8421E KX TG8422E KX TG8423E KX TG8424E KX TGA840E Cross Reference Check Point Base Unit P 48 ...
Страница 42: ...42 KX TG8421E KX TG8422E KX TG8423E KX TG8424E KX TGA840E Cross Reference Check Point Handset P 52 ...
Страница 57: ...57 KX TG8421E KX TG8422E KX TG8423E KX TG8424E KX TGA840E ...
Страница 58: ...58 KX TG8421E KX TG8422E KX TG8423E KX TG8424E KX TGA840E 10 1 2 Handset ...
Страница 59: ...59 KX TG8421E KX TG8422E KX TG8423E KX TG8424E KX TGA840E 10 1 3 Charger Unit ...
Страница 60: ...60 KX TG8421E KX TG8422E KX TG8423E KX TG8424E KX TGA840E 10 2 How to Replace the Handset LCD ...
Страница 79: ...79 KX TG8421E KX TG8422E KX TG8423E KX TG8424E KX TGA840E 1 Put the shield case 2 Solder the surroundings ...
Страница 81: ...81 KX TG8421E KX TG8422E KX TG8423E KX TG8424E KX TGA840E Memo ...
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Страница 87: ...87 KX TG8421E KX TG8422E KX TG8423E KX TG8424E KX TGA840E Memo ...
Страница 99: ...99 KX TG8421E KX TG8422E KX TG8423E KX TG8424E KX TGA840E 15 3 Cabinet and Electrical Parts Charger Unit ...
Страница 101: ...101 KX TG8421E KX TG8422E KX TG8423E KX TG8424E KX TGA840E 15 4 2 KX TG8422EB EM EN ...
Страница 102: ...102 KX TG8421E KX TG8422E KX TG8423E KX TG8424E KX TGA840E 15 4 3 KX TG8423EB EM EN ...
Страница 103: ...103 KX TG8421E KX TG8422E KX TG8423E KX TG8424E KX TGA840E 15 4 4 KX TG8424EB EM EN ...
Страница 104: ...104 KX TG8421E KX TG8422E KX TG8423E KX TG8424E KX TGA840E 15 4 5 KX TGA840EB EM EN ...