KX-NT303X - Panasonic PBX Service Manual (repair manual). Page 2

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1 Safety Precautions -----------------------------------------------3

1.1.  For Service Technicians ---------------------------------3

2 Warning --------------------------------------------------------------3

2.1. About Lead Free Solder (PbF: Pb free) --------------3

3 Specifications ------------------------------------------------------4
4 Technical Descriptions------------------------------------------4

4.1. Block Diagram ----------------------------------------------4
4.2. Circuit Operation -------------------------------------------5

5 Installation Instructions-----------------------------------------6
6 Troubleshooting Guide------------------------------------------7

6.1. No Opration--------------------------------------------------7
6.2. LED Does Not Light ---------------------------------------7

7 Disassembly and Assembly Instructions-----------------8
8 Miscellaneous ------------------------------------------------------9

8.1. Terminal Guide of ICs, Transistors and Diodes-----9
8.2. How To Replace a Flat Package IC ----------------- 10

9 Schematic Diagram--------------------------------------------- 12

9.1. Main Board------------------------------------------------- 12
9.2. Waveform -------------------------------------------------- 14

10 Printed Circuit Board ------------------------------------------ 15

10.1. Component View ----------------------------------------- 15
10.2. Bottom View ----------------------------------------------- 15

11 Appendix Information of Schematic Diagram --------- 16

12 Exploded View and Replacement Parts List ----------- 17

12.1. IC Data------------------------------------------------------ 17
12.2. Cabinet and Electrical Parts Location--------------- 18
12.3. Accessories and Packing Materials ----------------- 19
12.4. Replacement Parts List --------------------------------- 20