7. CIRCUIT OPERATION (BASE UNIT)
7.1. MAIN BOARD
7.1.1. POWER SUPPLY CIRCUIT
The Voltage between 9V and 16V is supplied to the DC Jack from the AC adaptor.
The Power for the RF Unit is supplied from IC251 and Q261.
The Power for the Analog Circuit is supplied from Q101.
The Power for the Main Board, Reset and Power Down Circuit are supplied from IC110.
7.1.2. BELL DETECTOR CIRCUIT
When the Bell signal is input between T/R, the signal of which waveform is shaped through
C100
R100
PC100 is input to pin (36) of the IC105(LPR). When the IC105(LPR) detects the
Содержание KX-TD7895 - Digital Spread Spedtrum Telephone
Страница 3: ...3 2 CONNECTIONS OF HANDSET ...
Страница 4: ...3 3 BASE UNIT ...
Страница 5: ...4 DISASSEMBLY INSTRUCTIONS 4 1 BASE UNIT ...
Страница 6: ...1 Remove the four screws A and remove the Bottom Cabinet ...
Страница 9: ...2 Take the Battery out of the Rear Cabinet after disconnecting the Connector ...
Страница 10: ...3 Remove two Screws D from the Rear Cabinet ...
Страница 12: ...6 Remove the Antenna from the Front Cabinet after removing the Screw E ...
Страница 13: ...7 Remove the RF unit from the Main Board ...
Страница 20: ...34 CHARGE I ON OFF ...
Страница 23: ...6 4 RF UNIT FREQUENCY TABLE ...
Страница 32: ...10 TROUBLESHOOTING GUIDE 10 1 NO VOICE RECEPTION 10 2 NO VOICE TRANSMISSION ...
Страница 33: ...10 3 NO LINK BASE UNIT ...
Страница 39: ...12 CABINET AND ELECTRICAL PARTS LOCATION 12 1 BASE UNIT ...
Страница 40: ...12 2 HANDSET ...
Страница 41: ...12 3 CHARGER ...
Страница 42: ...13 ACCESSORIES AND PACKING MATERIALS ...
Страница 46: ... CAPACITORS ...
Страница 63: ......
Страница 64: ......