KX-TG8105RU, KX-TG8106RU, KX-TGA810RU, KX-TG8106RUT, KX-TG8106RUS - Panasonic Telephone Service Manual (repair manual). Page 8

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Base Unit consists of the following ICs as shown in Block Diagram (Base Unit) (P.7).

• DECT BBIC (Base Band 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 (Burst Module Controller 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
- All interfaces (ex: RF module, EEPROM, LED, Analog Front End, etc.)

• RF Module: IC10

- PLL Oscillator
- Detector
- Compress/Expander
- First Mixer
- Amplifier for transmission and reception

• EEPROM: IC5

- Temporary operating parameters (for RF, etc.)

• Additionally,

- Power Supply Circuit (+3.3V, +2.5V, +1.8V output)
- Crystal Circuit (10.368MHz)
- Charge Circuit
- Telephone Line Interface Circuit

The power is supplied to the DECT BBIC, RF Module, EEPROM and Charge Contact from AC Adaptor (+6.5V) as shown in
Fig.101. The power supply is as follows;

• DECT BBIC (IC7): 

CN2 (+6.5V) 

→ IC1 → Q9 → IC7

CN2 (+6.5V) 

→ IC1 → Q8 → IC7

• RF Module (IC10): 

CN2 (+6.5V) 

→ IC1 → Q9 → IC10 (PLL)

CN2 (+6.5V) 

→ IC1 → Q10 → IC10 (Power AMP)

• EEPROM (IC5): 

CN2 (+6.5V) 

→ IC1 → Q9 → IC5

• Charge Contact (TP16): 

CN2 (+6.5V) 

→ R55, R56 → TP16

<Fig.101>