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Panasonic KX-NS700 Service Manual

Hybrid ip-pbx kx-ns700 kx-ns720 series power supply unit addition.
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Please file and use this supplement manual together with the service manual.

TABLE OF CONTENTS

1 Technical Descriptions ----------------------------------------- 2
1.1. Power Supply Unit----------------------------------------- 2
PSU ------------------------------------------------------ 2
1.3. Main Converter--------------------------------------------- 3
1.4. DC Switch and DC Output Circuit --------------------- 4
2 Troubleshooting Guide ----------------------------------------- 6
2.1. Power Supply Unit----------------------------------------- 6
2.1.3. 41V are Not Output----------------------------------- 8
Model No.
PAGE
3 Schematic Diagram ----------------------------------------------9
3.1. Power Supply Board ------------------------------------ 14
3.2. Waveform ----------------------------------------------------9
4 Printed Circuit Board ------------------------------------------ 15
4.1. Power Supply Board ------------------------------------ 15
4.1.1. Component View ------------------------------------ 15
4.1.2. Bottom View ------------------------------------------ 16
5.1. Power Supply Unit --------------------------------------- 17
5.2. Replacement Parts List--------------------------------- 18
5.2.1. Power Supply Board-------------------------------- 18
© Panasonic System Networks Co., Ltd. 2014
Unauthorized copying and distribution is a violation
of law.
ORDER NO. KMS1411488SE
Hybrid IP-PBX
KX-NS700
KX-NS720 Series
Power Supply Unit Addition
PAGE

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   Summary of Contents for Panasonic KX-NS700

  • Page 1: Table Of Contents

    2.1.1. No Voltage is Output at All (1) --------------------- 6 5.2.1. Power Supply Board-------------------------------- 18 2.1.2. No Voltage is Output at All (2) --------------------- 7 2.1.3. 41V are Not Output----------------------------------- 8 © Panasonic System Networks Co., Ltd. 2014 Unauthorized copying and distribution is a violation of law.

  • Page 2: Technical Descriptions

    ADDITIONS 1 Technical Descriptions 1.1. Power Supply Unit Added into the Original Service Manual as section 4.5. This unit is switching regulator power supply and supplies DC voltages to CPU Board (MPR), and optional card (free slot). PSU (power supply unit) has two outputs (41V, 15V). 15V output is supplied only in CPU Board (MPR) and option card. Other outputs are mainly used as an object for the electric supply to a terminal.

  • Page 3: Main Converter

    2) Rectification Smoothing Circuit This circuit consists mainly of the following components and performs AC-DC conversion. D2: Diode Bridge C4: Primary Smoothing Capacitor 3) Surge Absorber Circuit As the main component of this circuit, VR1 protects the system against exogenous noise such as lightning surge. VR1: Varistor 4) Inrush Current Avoiding Circuit Immediately after AC input applies voltage, the following components control inrush current to the Smoothing Capacitor.

  • Page 4: Dc Switch And Dc Output Circuit

    3) Latch function for protection Control IC U2 has the latch fonction to stop the PSU operation when over heat or over voltage is detected . To release the latch status, release the abnormal state at first, then remove the AC cord from PSU and leave for 60 seconds before restart.

  • Page 5: Ac Alarm Circuit And Dc Alarm Circuit

    1.5. AC Alarm Circuit and DC Alarm Circuit Added into the Original Service Manual as section 4.9. This section describes the operation of the circuit that sends the AC alarm/DC alarm signal. 1) AC alarm circuit When the AC Detection Circuit (described in section 1.2. (5)) detects AC input as "Yes", the Secondary side transistor of U1 turns ON.

  • Page 6: Troubleshooting Guide

    2 Troubleshooting Guide 2.1. Power Supply Unit Added into the Original Service Manual as section 9.2. 2.1.1. No Voltage is Output at All (1) Added into the Original Service Manual as section 9.2.1. Main converter output voltage error [Between pin1 and pin2 of CN100, DC Switch OFF]...

  • Page 7: No Voltage Is Output At All (2)

    2.1.2. No Voltage is Output at All (2) Added into the Original Service Manual as section 9.2.2. Output voltage of Main Converter is Normal [Between pin1 and pin2 of CN100, DC Switch ON]...

  • Page 8: Are Not Output

    2.1.3. 41V are Not Output Added into the Original Service Manual as section 9.2.3. (Only 15V is output)

  • Page 9: Schematic Diagram

    3 Schematic Diagram 3.1. Waveform 3.1.1. Power Supply Board Added into the Original Service Manual as section 12.5.6. VOLTAGE VOLTAGE 312V 14.6V CYCLE 10.00ms VOLTAGE CYCLE 328V 30.80μs CYCLE VOLTAGE 10.00ms 5.84V VOLTAGE VOLTAGE 18.0V 2.80V...

  • Page 10

    9 VOLTAGE CYCLE 32.40μs VOLTAGE VOLTAGE 19.0V 27.2V VOLTAGE CYCLE 18.8V 32.20μs VOLTAGE VOLTAGE 472V 48.0V...

  • Page 11

    CYCLE VOLTAGE 36.80μs 57.6V VOLTAGE VOLTAGE 42.4V 15.4V VOLTAGE VOLTAGE 42.4V 42.0V VOLTAGE VOLTAGE 42.4V 42.0V...

  • Page 12

    VOLTAGE CYCLE 25.6V 6.500μs VOLTAGE VOLTAGE 2.64V 42.8V VOLTAGE VOLTAGE 62.4V 39.2V VOLTAGE CYCLE 64.0V 6.500μs...

  • Page 13

    VOLTAGE 1.66V VOLTAGE...

  • Page 14: Power Supply Board

    3.2. Power Supply Board Added into the Original Service Manual as section 12.6.

  • Page 15: Printed Circuit Board

    4 Printed Circuit Board 4.1. Power Supply Board Added into the Original Service Manual as section 13.4. 4.1.1. Component View Added into the Original Service Manual as section 13.4.1.

  • Page 16: Bottom View

    4.1.2. Bottom View Added into the Original Service Manual as section 13.4.2.

  • Page 17: Exploded View And Replacement Parts List

    5 Exploded View and Replacement Parts List 5.1. Cabinet and Electrical Parts Location 5.1.1. Power Supply Unit Added into the Original Service Manual as section 15.2.1. PCB3...

  • Page 18: Replacement Parts List

    CHANGE 5.2. Replacement Parts List Safety Ref. Part No. Part Name & Description Remarks 12CC0221JTX1 5.2.1. Power Supply Board parts (PCB3) 12CC0105JTX1 Changed from Original section “15.4.5. Power Supply 12CC0221JTX1 12BB0331JTX1 Board parts (PCB3)”. 12CC0221JTX1 12CC0105JTX1 12CC0105JTX1 Safety Ref. Part No. Part Name &...

  • Page 19

    Safety Ref. Part No. Part Name & Description Remarks Safety Ref. Part No. Part Name & Description Remarks 12CC0153JTX1 R100 12BB0473JTX1 16AQN222MUDN 2200 R101 12BB0682JTX1 6.8k 16AQN222MUDN 2200 R102 12BB0473JTX1 16AQN222MUDN 2200 R103 12CC0101JTX1 16APN471KFDJ R104 12CC0183JTX1 16APN471KFDJ R105 12BB0681FTX2 R106 12BB0104JTX1 100k...

  • Page 20

    Safety Ref. Part No. Part Name & Description Remarks 23FB163500X CORE For D6,Q6,D7,C5 06F15N650CX MOSFET 06P3710B0CX MOSFET 080PC817CFD PHOTOCOUPLE 080PC817CFD PHOTOCOUPLE 080PC817CFD PHOTOCO UPLE 35GE02131XH AC INLET 41Z03080102 Screw 41Z03060102 Screw 41F30060102 Screw 41P30060102 Screw 364001000U0 TUBE For FT1 364413000UT TUBE For FT1,VR1 364006000U0 TUBE For R17...

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