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KX-TGA107 BLOCK DIAGRAM (HANDSET)

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The handset consists of Base Band Controller, LCD, RF module, keypad, regulator, charger, EEPROM, crystal, earpiece, ringer
& microphone, and so on.

The base band controller controls all function of the handset, Philips XS for the base band controller is used.
This device include all control circuits of the handset for RF module, LCD controller, keypad interface, earpiece, microphone,
ADPCM codec, switching and series regulator and so on.

The base-station supply DC 6V power to the charger and the charger charges the batteries to use this power. The signal on the
charger circuit is generated when the handset is to being charged this signal is used to control the charger circuit and for auto-
matic off-hook by cradle-off when an incoming call is coming.

The battery is (2.4V / 2cell) directly supplied to switching regulator which controlling by base band controller and step up the DC
3.3V to the RF module & I/O port. DC 2.5V & DC1.8V are used for the base band and the circumference circuits.

Receiver part: RF signals induced at the antenna are extracted by the RF control interface. The RF signal to be selected is
demodulated into RX_DATA signals. And signals is passed to the base band controller.
Transmitter part: The signal from transceiver chip-set is fed to the antenna through the RF power amplifier by control of the RF
control interface. And then this signal is radiated from antenna.
Logical part: The frequency to be used is generated in transceiver chip-set by control signals (CLK, DATA, ENABLE, SYRI) of
the RF control interface.

The LCD consists of 7-segment, 12 digit display and 13 icon which controlling by the LCD display driver.

The keypad consists of 12 dialing keys and 8 function keys.

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Rx audio signal from line interface at "LINERX_P" path into B/S MCU (pin 32, 33) and then signal from B/S RF transform, H/S RF
receive signal forward to MCU, H/S MCU from (pin 32, 33) receive path output audio signal to receiver.

Tx audio signal from MIC receive audio signal at mic path into H/S MCU and then audio signal from H/S RF transform, B/S RF
receive signal forward to MCU, B/S MCU audio signal from (Pin 30,29) at "LINETX_P" path transmit to line interface out of PSTN.

Telephone line have ringer signal from tip ring into Base, and then Base transistor Q8 turn on and ringer data signal for Base MCU
(Pin 58_IOGP16) detect and the handset buzzer have product "Melody tone" .

CID signal from tip ring couple CID signal at (CID1_P, CID1_N) path into Base MCU (Pin 29, 30) detect, Handset display show the
telephone no.

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* For models with 2 or more handsets included. 

• Use only the included AC adaptor and telephone line cord.
• Connect the AC adaptor securely to the AC outlet.
• Never install telephone wiring during a lightning storm.
• Do not connect the AC adaptor to a ceiling-mounted AC out-

let, as the weight of the adaptor may cause it to become dis-
connected.

• For maximum distance and noise-free operation, place your

base unit:

- away from electrical appliances such as TVs, radios, 

personal computers or other phones.

- in a convenient, high and central location.