KX-NCP1180X - 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

2.1.1. Suggested PbF Solder -------------------------------3

2.2. Discarding of P. C. Board --------------------------------4

3 Specifications ------------------------------------------------------5
4 Technical Descriptions------------------------------------------6

4.1. Block Diagram ----------------------------------------------6
4.2. Circuit Operation -------------------------------------------7

4.2.1. Description of Control System Circuits-----------7
4.2.2. Description of Functions and Circuits ------------9
4.2.3. Power Supply Voltage Generator --------------- 15

5 Location of Controls and Components------------------ 16

5.1. Names and Locations----------------------------------- 16

6 Installation Instructions--------------------------------------- 17

6.1. Information about the Physical Trunk Cards ------ 17

6.1.1. LCOT4 Card ------------------------------------------ 17

7 Troubleshooting Guide---------------------------------------- 18
8 Miscellaneous ---------------------------------------------------- 25

8.1. How To Replace a Flat Package IC ----------------- 25

8.1.1. Preparation-------------------------------------------- 25
8.1.2. Removal Procedure--------------------------------- 25
8.1.3. Procedure --------------------------------------------- 25
8.1.4. Removing Solder From Between Pins --------- 25

8.2. Terminal Guide of the ICs Transistors and

Diodes------------------------------------------------------- 26

8.3. Memo-------------------------------------------------------- 27

9 Schematic Diagram--------------------------------------------- 28

9.1. No.1---------------------------------------------------------- 28
9.2. No.2---------------------------------------------------------- 30
9.3. Waveform -------------------------------------------------- 32

10 Printed Circuit Board ------------------------------------------ 35

10.1. Component View ----------------------------------------- 35
10.2. Bottom View ----------------------------------------------- 36

11 Appendix Information of Schematic Diagram --------- 37

12 Exploded View and Replacement Parts List ----------- 38

12.1. IC Data------------------------------------------------------ 38

12.1.1. IC5 (ASIC)--------------------------------------------- 38
12.1.2. IC203 (CODEC) ------------------------------------- 40
12.1.3. IC3 (Caller ID ASIC) -------------------------------- 41

12.2. Cabinet and Electrical Parts Location--------------- 44
12.3. Accessories and Packing Material------------------- 45
12.4. Replacement Parts List --------------------------------- 46

12.4.1. Cabinet and Electrical Parts Location ---------- 46
12.4.2. Accessories and Packing Materials------------- 46
12.4.3. Main Board Parts ------------------------------------ 46