KX-TDE620BX (serv.man8) - Panasonic PBX Service Manual Supplement (repair manual). Page 2

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

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

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

2.1. Information for Users on Collection and

Disposal of Old Equipment and used Batteries-----3

2.2. Battery Caution ---------------------------------------------4
2.3. Caution--------------------------------------------------------4
2.4. About Lead Free Solder (PbF: Pb free) --------------4

2.4.1. Suggested PbF Solder -------------------------------4

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

3 Specifications ------------------------------------------------------5

3.1. General Description ---------------------------------------5
3.2. Characteristics ----------------------------------------------5

4 Technical Descriptions------------------------------------------6

4.1. BUS-S Block Diagram ------------------------------------6
4.2. BUS-S Card Circuit Operation --------------------------7

4.2.1. BUS-S CARD-------------------------------------------7

4.3. Back Board Circuit Operation ------------------------- 11
4.4. Outline ------------------------------------------------------ 12

4.4.1. Genral Description ---------------------------------- 12
4.4.2. BUS-S Card------------------------------------------- 12
4.4.3. Back Board-------------------------------------------- 12
4.4.4. Power Supply Unit ---------------------------------- 12
4.4.5. System Control--------------------------------------- 13
4.4.6. Back Board Signal Connection Diagram ------ 16

5 Location of Controls and Components------------------ 19

5.1. Names and Locations ----------------------------------- 19

6 Installation Instructions--------------------------------------- 20

6.1. System Configurations---------------------------------- 20
6.2. Expanded System---------------------------------------- 22
6.3. System Capacity ----------------------------------------- 25

7 Troubleshooting Guide---------------------------------------- 26

7.1. BUS-S Card ----------------------------------------------- 26

8 Service Fixture & Tools --------------------------------------- 32
9 Disassembly and Assembly Instructions --------------- 33

9.1. BUS-S Card ----------------------------------------------- 33
9.2. Back Board ------------------------------------------------ 34

10 Miscellaneous ---------------------------------------------------- 36

10.1. How To Replace a Flat Package IC ----------------- 36

10.1.1. Preparation-------------------------------------------- 36
10.1.2. Removal Procedure--------------------------------- 36
10.1.3. Procedure --------------------------------------------- 36
10.1.4. Removing Solder From Between Pins --------- 36

11 Schematic Diagram--------------------------------------------- 37

11.1. Block Diagram -------------------------------------------- 37
11.2. BUS-S Card No.1 ---------------------------------------- 38
11.3. BUS-S Card No.2 ---------------------------------------- 39

11.4. BUS-S Card No.3---------------------------------------- 40
11.5. BUS-S Card No.4---------------------------------------- 41
11.6. BUS-S Card No.5---------------------------------------- 42
11.7. BUS-S Card No.6---------------------------------------- 43
11.8. BUS-S Card No.7---------------------------------------- 44
11.9. BB-EXP Card No.1 -------------------------------------- 45

11.10. BB-EXP Card No.2 -------------------------------------- 47

11.11. BB-EXP Card No.3 -------------------------------------- 49

11.12. Waveform -------------------------------------------------- 51

12 Printed Circuit Board------------------------------------------ 52

12.1. BUS-S Board --------------------------------------------- 52

12.1.1. Component View ------------------------------------ 52

12.2. BB-EXP Board-------------------------------------------- 53

12.2.1. Component View ------------------------------------ 53

13 Appendix Information of Schematic Diagram -------- 54
14 Exploded View and Replacement Parts List----------- 55

14.1. Cabinet and Electric Parts----------------------------- 55
14.2. Accessories and Packing Materials ----------------- 57
14.3. Replacement Parts List -------------------------------- 58

14.3.1. Cabinet and Electrical Parts---------------------- 58
14.3.2. Accessories ------------------------------------------ 59
14.3.3. Main Board Parts ----------------------------------- 59
14.3.4. Back/LED Board Parts----------------------------- 64
14.3.5. Tools---------------------------------------------------- 64