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KX-NCP500GR
4.6.
Power Supply Unit Circuit Operation
4.6.1.
AC Section and Rectifier Circuit
Provides a description from AC input to the rectifier smoothing circuit.
1. Filter circuit
Consisting of the following parts, removes exogenous noise and noise generated by the power source.
C1/C2: Normal mode filter (X capacitor)
L1/L2: Common mode noise filter
C3/C4: Common mode filter (Y capacitor)
2. Rectifier circuit
Consisting of the following parts, the rectifier circuit converts alternating current to direct current.
D1: Diode bridge
C5: Primary smoothing capacitor
3. Surge absorber circuit
Consisting of Z1, the surge absorber circuit protects the equipment from exogenous surge such as lightning surge.
Z1: Varistor
4. Rush current prevention
Suppresses rush current to smoothing capacitor immediately following AC input by the following parts.
NTC1: Thermistor
5. AC voltage detection circuit
Consisting of the following parts, the AC voltage detection circuit detects presence of AC input voltage input.
D80, D81, R80-R95, Q80, Q81, Q82, PC80 Rectifies AC voltage by D80 and D81.
If AC input voltage exceeds threshold voltage, Q82, Q80 and Q81 turn "on" and the secondary side is informed of presence of
AC input through PC80.
6. CN2/CN3
Connector for PCC casing switch connection.
Summary of Contents for KX-NCP500GR
Page 9: ...9 KX NCP500GR ...
Page 12: ...12 KX NCP500GR 4 2 Power Supply Block Diagram ...
Page 20: ...20 KX NCP500GR 4 5 5 System Control 4 5 5 1 System Control Block Diagram ...
Page 21: ...21 KX NCP500GR 4 5 5 2 Voice TDM Highway Bus Block Diagram ...
Page 24: ...24 KX NCP500GR 4 5 6 2 EC Bus System Connection Diagram ...
Page 32: ...32 KX NCP500GR 5 Location of Controls and Components 5 1 Name and Locations ...
Page 36: ...36 KX NCP500GR ...
Page 53: ...53 KX NCP500GR 9 Troubleshooting Guide 9 1 IPCMPR Card 9 1 1 Startup ...
Page 54: ...54 KX NCP500GR ...
Page 55: ...55 KX NCP500GR ...
Page 56: ...56 KX NCP500GR ...
Page 57: ...57 KX NCP500GR 9 1 1 1 Main alarm light turns on ...
Page 58: ...58 KX NCP500GR 9 1 1 2 SD card access light does not flash ...
Page 60: ...60 KX NCP500GR ...
Page 61: ...61 KX NCP500GR 9 1 1 6 Option card cannot start up ...
Page 62: ...62 KX NCP500GR 9 1 2 Phone Call 9 1 2 1 The path cannot connect ...
Page 63: ...63 KX NCP500GR 9 1 2 2 Noise is created ...
Page 64: ...64 KX NCP500GR 9 1 3 Paging 9 1 3 1 Noise is created ...
Page 65: ...65 KX NCP500GR ...
Page 66: ...66 KX NCP500GR 9 1 4 Using MOH ...
Page 67: ...67 KX NCP500GR ...
Page 68: ...68 KX NCP500GR 9 1 5 LAN 9 1 5 1 LAN Connection ...
Page 69: ...69 KX NCP500GR 9 1 6 ESVM 9 1 6 1 ESVM function record play ...
Page 70: ...70 KX NCP500GR ...
Page 71: ...71 KX NCP500GR 9 1 7 RS 232C 9 1 7 1 RS 232C Connection ...
Page 72: ...72 KX NCP500GR 9 1 8 SD card IF ...
Page 73: ...73 KX NCP500GR 9 1 9 Other ...
Page 75: ...75 KX NCP500GR 9 2 1 1 Defective parts list ...
Page 78: ...78 KX NCP500GR 9 2 4 15VPT output voltage only not output 9 2 4 1 Defective parts list ...
Page 79: ...79 KX NCP500GR 9 2 5 41V output voltage only not output 9 2 5 1 Defective parts list ...
Page 80: ...80 KX NCP500GR 10 Service Fixture Tools 10 1 Extension Boards for Servicing ...
Page 87: ...87 KX NCP500GR 12 2 3 Power Supply Board ...
Page 129: ...129 KX NCP500GR Waveform 7 Waveform 8 Waveform 9 159 984MHz 13 824MHz 16 384MHz ...
Page 145: ...145 KX NCP500GR 16 2 Cabinet and Electrical Parts Location ...
Page 146: ...146 KX NCP500GR 16 3 Accessories and Packing Material ...