© Panasonic System Networks Co., Ltd. 2014
Unauthorized copying and distribution is a violation
of law.
ORDER NO. KMS1411488SE
Hybrid IP-PBX
Model No.
KX-NS700
KX-NS720 Series
Power Supply Unit Addition
TABLE OF CONTENTS
PAGE
PAGE
1 Technical Descriptions
-----------------------------------------
2
1.1. Power Supply Unit----------------------------------------- 2
1.1.1. Block Diagram and Circuit Description of
PSU ------------------------------------------------------ 2
1.2. AC input, Rectification Smoothing Circuit ----------- 2
1.3. Main Converter--------------------------------------------- 3
1.4. DC Switch and DC Output Circuit --------------------- 4
1.5. AC Alarm Circuit and DC Alarm Circuit -------------- 5
2 Troubleshooting Guide
-----------------------------------------
6
2.1. Power Supply Unit----------------------------------------- 6
2.1.1. No Voltage is Output at All (1) --------------------- 6
2.1.2. No Voltage is Output at All (2) --------------------- 7
2.1.3. 41V are Not Output----------------------------------- 8
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 Exploded View and Replacement Parts List
-----------
17
5.1. Power Supply Unit --------------------------------------- 17
5.2. Replacement Parts List--------------------------------- 18
5.2.1. Power Supply Board-------------------------------- 18
Please file and use this supplement manual together with the service manual.
