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14 CIRCUIT OPERATION (HANDSET)
14.1. Outline
Handset consist of the following ICs as shown in BLOCK DIAGRAM.
·
CPU: U1
−
−
All data signals (forming/analyzing ACK or CMD signal*)
−
−
All interfaces (ex; LED, Key, Buzzer, Detector Circuit, Charge, Battery Low)
−
−
RAM for keeping the data (CH Number, ID Code, etc.)
·
RF IC:IC1
−
−
PLL Oscillator
−
−
Compress/Expander
−
−
Amplifier for transmission and reception
14.2. Reset Circuit/Charge Circuit
The power of handset is supplied by battery.
Whenever the battery is recharged or inserted, the impulse at CHG1 becomes Reset signal through D11, and sent to CPU.
*Refer to
Charge Circuit
(P.33).
<Fig. 201>
37
KX-TC1468LBB
Summary of Contents for KX-TC1468LBB
Page 5: ...2 LOCATION OF CONTROLS 2 1 Base unit 2 2 Handset 5 KX TC1468LBB ...
Page 6: ...2 3 Battery Replacement 6 KX TC1468LBB ...
Page 8: ...8 KX TC1468LBB ...
Page 10: ...4 OPERATIONS 4 1 Making Calls 4 2 Answering Calls 10 KX TC1468LBB ...
Page 27: ...9 3 Adjustment Handset Main component View DC Power Supply Battery 27 KX TC1468LBB ...
Page 35: ...12 7 Signal Route Each signal route is as follows 35 KX TC1468LBB ...
Page 43: ...19 CABINET AND ELECTRICAL PARTS LOCATION BASE UNIT 43 KX TC1468LBB ...
Page 44: ...20 CABINET AND ELECTRICAL PARTS LOCATION HANDSET 44 KX TC1468LBB ...
Page 45: ...21 ACCESSORIES AND PACKING MATERIALS 45 KX TC1468LBB ...