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KX-NCP500GR
[3] 41V Output Voltage Section
1. 41V Output Section
The 41V output section is a dropper type regulator circuit with 41V output described in Part 2 as input voltage that primarily
consists of Q151, Q154, IC101, R107, R106 and VR101.
Q151 is turned on by 41V SW output described in Part 2; output voltage is stabilized by adjusting voltage between Q151 gate
sources by Q154.
Output voltage is determined by IC101, R107, R106 and VR101.
2. 41V Output Overcurrent Protection Section
The 41V output overcurrent protection section consists primarily of R157 and Q153.
If overcurrent flows to R157, difference in electrical potential of R157 is detected, which turns Q153 on and Q151 off, resulting
in drooping characteristic.
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 ...