17.2. 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 inside of RF IC. The detected voltage is as follows;
- Battery Low
Battery voltage : V(Batt) < 3.57V
The CPU detects this level and “Recharge battery” LED starts
flashing.
- Power Down
Battery voltage : V(Batt) < 3.3V
The output of RF IC (P-DOWN) becomes low level, then CPU stops
working to keep the data (CH number, ID Code, etc.)
Fig. 6
18. CPU DATA (Base Unit)
18.1. IC2
39
Summary of Contents for KX-TC1200NLB
Page 3: ...2 BATTERY REPLACEMENT 3 LOCATION OF CONTROLS 3 1 Base Unit 3 ...
Page 4: ...3 2 Handset 4 ...
Page 5: ...4 CONNECTION 5 ...
Page 7: ...5 2 Answering Calls 5 3 Storing Phone Numbers in Memory 7 ...
Page 8: ...5 4 Storing a Phone Number in the DIRECT Button 5 5 Dialing a Stored Number 8 ...
Page 9: ...5 6 Dialing a Stored Number in the DIRECT Button 5 7 Recall Button 9 ...
Page 10: ...6 DISASSEMBLY INSTRUCTIONS 10 ...
Page 25: ...25 ...
Page 27: ... The channel is changed if the noise interferes with the conversation 13 2 Ringing 27 ...
Page 28: ...13 3 Changing the Channel 28 ...
Page 38: ...Fig 4 Fig 5 38 ...
Page 40: ...19 CPU DATA Handset 19 1 IC2 40 ...
Page 41: ...20 HOW TO REPLACE FLAT PACKAGE IC 20 1 Preparation SOLDER 41 ...
Page 44: ...22 CABINET AND ELECTRICAL PARTS LOCATION HANDET 44 ...
Page 45: ...23 ACCESSORIES AND PACKING MATERIALS 45 ...
Page 61: ...IC5 KX TC1200NLB CIRCUIT BOARD Component View Base Unit ...
Page 63: ...IC2 150Ω AF Volt Meter H Oscilloscope G Noise Squelch A Battery Low 47µF AF Generator ...
