KX-NCP1188XJ - Panasonic PBX Service Manual (repair manual). Page 2

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

1.1. For Service Technicians  ---------------------------------3
1.2. Discarding of P. C. Board --------------------------------3

2 Warning --------------------------------------------------------------4

2.1. About Lead Free Solder (PbF: Pb free) --------------4

2.1.1. Suggested PbF Solder -------------------------------4

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

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

4.2.1. CPU Peripheral Circuit -------------------------------7

4.3. Line Interface Function -----------------------------------9

4.3.1. Line Interface Outline---------------------------------9
4.3.2. Line Interface Loopback -----------------------------9

4.4. DSP---------------------------------------------------------- 10

4.4.1. DSP Function Outline ------------------------------ 10
4.4.2. DSP Peripheral Interface -------------------------- 11

4.5. Local Highway Interface Function ------------------- 12
4.6. EC BUS Interface ---------------------------------------- 13

4.6.1.  Dual Port RAM (DPRAM) Communication --- 13

4.7. Outline of Reset System ------------------------------- 14

4.7.1.  Reset Operation ------------------------------------ 14

4.8. Power Supply --------------------------------------------- 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. E1 Card ------------------------------------------------ 17

7 Troubleshooting Guide---------------------------------------- 19
8 Miscellaneous ---------------------------------------------------- 24

8.1. How To Replace a Flat Package IC ----------------- 24

8.1.1. Preparation-------------------------------------------- 24
8.1.2. Removal Procedure--------------------------------- 24
8.1.3. Procedure --------------------------------------------- 24
8.1.4. Removing Solder From Between Pins --------- 24

8.2. Terminal Guide of the ICs Transistors and

Diodes------------------------------------------------------- 25

9 Schematic Diagram--------------------------------------------- 26

9.1. No.1---------------------------------------------------------- 26
9.2. No.2---------------------------------------------------------- 28
9.3. No.3---------------------------------------------------------- 30
9.4. No.4---------------------------------------------------------- 32
9.5. No.5---------------------------------------------------------- 34

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. IC1 (CPU) --------------------------------------------- 38
12.1.2. IC2 (ASIC)--------------------------------------------- 40

12.2. Cabinet and Electrical Parts Location--------------- 42
12.3. Accessories and Packing Materials ----------------- 43
12.4. Replacement Parts List --------------------------------- 44

12.4.1. Cabinet and Electrical Parts Location ---------- 44
12.4.2. Accessories and Packing Materials------------- 44
12.4.3. Main Board Parts ------------------------------------ 44