- 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
17.2. 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
().
<Fig. 201>
17.3. Battery Low / Power Down Detector
Circuit Operation:
“Battery Low” and “Power Down” are detected by RF IC which check the voltage from battery.
Shortly, every detected blocks are inseide of RF IC. The detected voltage is as follows;
- Battery Low
Battery voltage : V(Batt) < 3.57V
The CPU detects this level and IN USE “ ” starts flashing.
- Power Down
Battery voltage : V(Batt) < 3.36V
The output of RF IC (P-DOWN) becomes low level, then CPU stops
working to keep the data (CH number, ID Code, etc.)
<Fig. 202>
29
Содержание KX-TC1464LCB
Страница 5: ...maximize the battery life The battery cannot be overcharged 5 LOCATION OF CONTROLS 5 1 Base unit 5 ...
Страница 6: ...5 2 Handset 5 3 Battery Replacement 6 ...
Страница 7: ...6 CONNECTIONS 7 ...
Страница 10: ...7 2 Answering Calls 8 DISASSEMBLY INSTRUCUTIONS 10 ...
Страница 17: ...10 4 Check Link Refer to Adjustment Note CPU IC3 RF IC IC1 17 ...
Страница 30: ...18 SIGNAL ROUTE Each signal route is as follows 19 CPU DATA BASE UNIT 19 1 IC3 30 ...
Страница 36: ...24 CABINET AND ELECTRICAL PARTS LOCATION 36 ...
Страница 37: ... HANDSET 25 ACCESSORIES AND PACKING MATERIALS 37 ...
Страница 38: ...26 TERMINAL GUIDE OF THE ICs TRANSISTORS AND DIODES 26 1 Base Unit 26 2 Handset 38 ...
Страница 56: ...Marked PbF SP_OUT ...
Страница 57: ...U1 X1 Marked PbF 1 14 28 15 Rec_O P_B CH_DET U1 25 ...
Страница 59: ...AF OSC LOOP SIMULATOR Audio Analyzer E F Tip Ring IC3 PbF ...
Страница 61: ...DC Power Supply Battery PbF ...
Страница 69: ...IC2 KX TC1464LCB BASE UNIT Main Component View L seize 1 7 8 14 Power Down Tx Down SIG_OUT PbF ...
Страница 71: ...KX TC1464LCB BASE UNIT Locator Component View PbF ...
Страница 72: ...KX TC1464LCB BASE UNIT Locator Flow Solder Side View PbF ...
Страница 74: ...KX TC1464LCB HANDSET Main Component View SP_OUT PbF ...
Страница 75: ...PbF U1 X1 KX TC1464LCB HANDSET Main Flow Solder Side View 1 14 28 15 Rec_O P_B CH_DET U1 25 ...
Страница 77: ...Marked IC2 PbF L seize 1 7 8 14 Power Down Tx Down SIG_OUT ...
Страница 78: ...IC3 Marked PbF 1 28 14 15 LED P1 IC3 12 CHG_DET IC3 25 Ring_DET IC3 26 ...
Страница 79: ...Marked PbF ...
Страница 80: ...Marked PbF ...
Страница 81: ...IC1 Marked PbF D_OUT D_IN Tx Data REC_O P_A 14 15 28 29 42 43 56 1 TP809 TXVCO TP808 RXVCO TP510 ...