KX-TDA1180X (serv.man3) - 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. Battery Caution ---------------------------------------------3
2.2. Caution--------------------------------------------------------3
2.3. About Lead Free Solder (PbF: Pb free) --------------3

2.3.1. Suggested PbF Solder -------------------------------4

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

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

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

4.2.1. Description of Control System Circuits ----------7

4.3. Description of Functions and Circuits -----------------9

4.3.1. Dial Pulse Signal Transmission --------------------9
4.3.2. Circuit For Line Acquisition -------------------------9
4.3.3. DTMF Signal Transmission ----------------------- 10
4.3.4. Bell Signal Detection ------------------------------- 10
4.3.5. End-Call Signal Detection ------------------------- 11
4.3.6. Polarity Reversal Detection ----------------------- 11
4.3.7. 2W-4W Conversion --------------------------------- 12
4.3.8. CODEC Interface------------------------------------ 12
4.3.9. CODEC Function  ----------------------------------- 13

4.3.10. Surge Protection------------------------------------- 13

4.3.11. Power Failure Port ---------------------------------- 14

4.3.12. Option Cards ----------------------------------------- 15
4.3.13. Noise Rejection -------------------------------------- 16

4.4. Power Supply Circuit ------------------------------------ 17

4.4.1. Power Supply System------------------------------ 18

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

5.1. Name and Locations ------------------------------------ 19
5.2. Instlling/Removing the Optional Service Cards--- 20

6 Troubleshooting Guide---------------------------------------- 28
7 Miscellaneous ---------------------------------------------------- 35

7.1. How To Replace a Flat Package IC ----------------- 35

7.1.1. Preparation-------------------------------------------- 35
7.1.2. Removal Procedure--------------------------------- 35
7.1.3. Procedure --------------------------------------------- 35
7.1.4. Removing Solder From Between Pins --------- 35

7.2. How to Replace the LLP (Leadless Leadframe

Package) IC and IC ground plate -------------------- 36

7.2.1. Preparation-------------------------------------------- 36
7.2.2. Caution------------------------------------------------- 36
7.2.3. How to Remove the IC ----------------------------- 36
7.2.4. How to Install the IC -------------------------------- 36
7.2.5. How to Remove a Solder Bridge (Doesn't

apply to IC ground plate.) ------------------------- 37

7.3. Terminal Guide of the ICs, Transistors and

Diodes------------------------------------------------------- 38

7.4. Memo-------------------------------------------------------- 39

8 Schematic Diagram--------------------------------------------- 40

8.1. No.1---------------------------------------------------------- 40
8.2. No.2---------------------------------------------------------- 42
8.3. No.3---------------------------------------------------------- 44
8.4. Waveform -------------------------------------------------- 46

9 Printed Circuit Board ------------------------------------------ 49

9.1. Component View ----------------------------------------- 49
9.2. Bottom View ----------------------------------------------- 50

10 Appendix Information of Schematic Diagram -------- 51

11 Exploded View and Replacement Parts List----------- 52

11.1. IC Data ----------------------------------------------------- 52

11.1.1. IC3 (ASIC) -------------------------------------------- 52
11.1.2. IC6 (CODEC) ---------------------------------------- 54
11.1.3. IC7 (CODEC) ---------------------------------------- 55
11.1.4. IC308, IC409 (Caller ID ASIC)------------------- 56

11.2. Cabinet and Electrical Parts Location -------------- 59
11.3. Accessories and Packing Materials----------------- 60
11.4. Peplacement Part List ---------------------------------- 61

11.4.1. Cabinet and Electrical Parts --------------------- 61
11.4.2. Accessories and Packing Materials ------------ 61
11.4.3. Main Board Parts ----------------------------------- 61