KX-NS5290CE - Panasonic PBX Service Manual (repair manual). Page 2

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

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

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

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

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

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

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

4.1. Block Diagram ----------------------------------------------6
4.2. Circuit Operation (PRIBlock) ----------------------------7

4.2.1. ISDN Primary Rate Interface Function-----------7
4.2.2. Local Highway Interface Function-----------------7

4.3. Outline of Reset System ---------------------------------8
4.4. Power Supply -----------------------------------------------8
4.5. Local Highway Interface ----------------------------------8

5 Location of Controls and Components--------------------9

5.1. Names and Locations -------------------------------------9

6 Installation Instructions--------------------------------------- 10

6.1. The Mother Board and Expansion Cards ---------- 10

6.1.1. PRI30/E1 Card  -------------------------------------- 10

7 Troubleshooting Guide---------------------------------------- 12

7.1. Short-circuit trouble -------------------------------------- 12
7.2. Voltage trouble -------------------------------------------- 12
7.3. Communication Trouble -------------------------------- 13

8 Miscellaneous ---------------------------------------------------- 14

8.1. How To Replace a Flat Package IC ----------------- 14

8.1.1. Preparation-------------------------------------------- 14
8.1.2. Removal Procedure--------------------------------- 14
8.1.3. Procedure --------------------------------------------- 14
8.1.4. Removing Solder From Between Pins --------- 14

8.2. Terminal Guide of the ICs Transistors and

Diodes------------------------------------------------------- 15

9 Schematic Diagram--------------------------------------------- 16

9.1. Main Board------------------------------------------------- 16

9.1.1. No.1 ----------------------------------------------------- 16
9.1.2. No.2 ----------------------------------------------------- 18

9.2. Waveform -------------------------------------------------- 20

10 Printed Circuit Board ------------------------------------------ 21

10.1. Main Board------------------------------------------------- 21

10.1.1. Component View ------------------------------------ 21
10.1.2. Bottom View ------------------------------------------ 22

11 Appendix Information of Schematic Diagram --------- 23

12 Exploded View and Replacement Parts List ----------- 24

12.1. IC Data------------------------------------------------------ 24

12.1.1. IC504 (MISCPLD) ----------------------------------- 24

12.2. Cabinet and Electrical Parts --------------------------- 26
12.3. Accessories and Packing Material ------------------- 27
12.4. Replacement Parts List --------------------------------- 28

12.4.1. Cabinet and Electrical Parts  --------------------- 28
12.4.2. Accessories and Packing Materials------------- 28
12.4.3. Main Board Parts ------------------------------------ 28