- Detector
- Compress/Expander
- First/Second Mixer
- Amplifier for transmission and reception
- EEPROM: IC1
- Temporary operating parameters (for RF, etc.)
- Additionally,
- Power Supply Circuit (+4.0V, +2.65V output)
- Crystal Circuit (10.368MHz)
- Charge Circuit
- Telephone Line Interface Circuit
20.2. Power Supply Circuit
The power is supplied to the DECT BBIC, RF Module, EEPROM, Relay Coil, LED and Charge
Contact from AC Adaptor (+6V) as shown in Fig.101. The power supply is as follows;
- DECT BBIC (IC2): J2(+6V) D4 Q9 D5 Q8 IC2
- RF Module (IC3): J2(+6V) D4 Q9 IC3
- EEPROM (IC1): J2(+6V) D4 Q9 D5 Q8 IC2 IC1
- RINGER: J2(+6V) D4 Q9 R68 RINGER
- Charge Contact (TP84): J2(+6V) D4 R43, R44 TP84
<Fig.101>
51
Summary of Contents for KX-A143EXB
Page 8: ...5 LOCATION OF CONTROLS 5 1 Base Unit 5 2 Handset 8 ...
Page 18: ...8 OPERATIONS 8 1 Turning the Power On Off 18 ...
Page 22: ...8 6 Selecting a Base Unit 9 DISASSEMBLY INSTRUCTIONS 9 1 Base Unit 22 ...
Page 26: ...11 TROUBLESHOOTING GUIDE Flow Chart 26 ...
Page 49: ...18 FREQUENCY TABLE MHz 49 ...
Page 56: ...25 CPU DATA BASE UNIT 25 1 IC2 BBIC 56 ...
Page 60: ...45 MICP A I 60 ...
Page 73: ...73 ...
Page 75: ...33 ACCESSORIES AND PACKING MATERIALS 75 ...
Page 76: ...33 1 KX TCD430FXB FXC FXW 33 2 KX A143EXB EXC EXW 76 ...
Page 77: ...34 TERMINAL GUIDE OF THE ICs TRANSISTORS AND DIODES 34 1 Base Unit 77 ...
Page 102: ...PbF D1 J1 CIRCUIT BOARD CHARGER UNIT Component View ...
Page 103: ...PbF R1 R2 TP4 TP1 TP2 TP3 CIRCUIT BOARD CHARGER UNIT Flow Solder Side View ...
Page 104: ...Marked PbF IC1 IC3 IC2 1 1 64 49 33 4 5 8 1 11 28 18 ...
Page 106: ...PbF IC1 IC2 100 80 30 50 5 8 4 1 11 18 1 IC3 Marked ...
Page 108: ...PbF D1 J1 Marked PbF R1 R2 TP4 TP1 TP2 TP3 Marked Component View Flow Solder Side View ...
Page 112: ...PbF R1 R2 TP4 TP1 TP2 TP3 Digital Volt Meter 12Ω 2W A ...