KX-NT346RU (serv.man2) - 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

3.1. General Descriptions--------------------------------------4

4 Technical Descriptions------------------------------------------5

4.1. Block Diagram ----------------------------------------------5
4.2. Circuit Operations ------------------------------------------6

5 Location of Controls and Components------------------ 17

5.1. Name and Locations ------------------------------------ 17

6 Installation Instructions--------------------------------------- 18

6.1. Optional Accesory---------------------------------------- 18

7 Troubleshooting Guide---------------------------------------- 19

7.1. No Operation ---------------------------------------------- 19
7.2. LCD Does Not Operate--------------------------------- 22
7.3. Handset Does Not work -------------------------------- 23
7.4. Headset Does Not work -------------------------------- 24
7.5. Speaker-Phone Trouble -------------------------------- 25
7.6. Ethernet Does Not work -------------------------------- 26
7.7. LED Does Not Light ------------------------------------- 29
7.8. Bluetooth Does Not work------------------------------- 30

8 Disassmbly Instructions-------------------------------------- 32
9 Maintenance ------------------------------------------------------ 33

9.1. Terminal Guide of the ICs Transistors and

Diodes------------------------------------------------------- 33

9.2. How To Replace a Flat Package IC ----------------- 34

10 Schematic Diagram--------------------------------------------- 35

10.1. Block Diagram -------------------------------------------- 35
10.2. Main No.1 -------------------------------------------------- 36
10.3. Main No.2 -------------------------------------------------- 40
10.4. Main No.3 -------------------------------------------------- 44
10.5. Main No.4 -------------------------------------------------- 46
10.6. Jack---------------------------------------------------------- 50
10.7. LCD ---------------------------------------------------------- 51
10.8. Waveform -------------------------------------------------- 52

11 Printed Circuit Board ------------------------------------------ 56

11.1. Main Board------------------------------------------------- 56
11.2. Jack Board ------------------------------------------------- 58
11.3. LCD Board ------------------------------------------------- 59

12 Appendix Information of Schematic Diagram --------- 60
13 Exploded View and Replacement Parts List ----------- 61

13.1. IC Data------------------------------------------------------ 61
13.2. Cabinet and Electric Parts ----------------------------- 71
13.3. Accessories and Packing Materials ----------------- 72
13.4. Replacement Parts List --------------------------------- 73