KX-DT333RU - 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

3 Specifications ------------------------------------------------------4

3.1. General Descriptions--------------------------------------4

4 Technical Descriptions------------------------------------------5

4.1. Block Diagram ----------------------------------------------5
4.2. Circuit Operations ------------------------------------------6

5 Location of Controls and Components------------------ 14

5.1. Name and Locations ------------------------------------ 14

6 Installation Instructions--------------------------------------- 15
7 Troubleshooting Guide---------------------------------------- 16

7.1. No Operation ---------------------------------------------- 16
7.2. LCD Does Not Operate--------------------------------- 17
7.3. Handset Does Not work -------------------------------- 18
7.4. Headset Does Not work -------------------------------- 19
7.5. Speaker-Phone Does Not work----------------------- 20
7.6. DXDP-DPT Does Not work ---------------------------- 21

8 Disassembly and Assembly Instructions--------------- 22

8.1. Remove Main Board------------------------------------- 22
8.2. Disassembly for Lower Cabinet Ass’y -------------- 23
8.3. Assembly for Lower Cabinet Ass’y  ----------------- 24

9 Miscellaneous ---------------------------------------------------- 26

9.1. Terminal Guide of the ICs Transistors and

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

9.2. How To Replace a Flat Package IC ----------------- 27

10 Schematic Diagram--------------------------------------------- 28

10.1. Main Board------------------------------------------------- 28
10.2. Jack---------------------------------------------------------- 32
10.3. LCD ---------------------------------------------------------- 33
10.4. Waveform -------------------------------------------------- 34
10.5. Memo-------------------------------------------------------- 35

11 Printed Circuit Board ------------------------------------------ 36

11.1. Main Board------------------------------------------------- 36
11.2. Jack Board ------------------------------------------------- 38
11.3. LCD Board ------------------------------------------------- 39

12 Appendix Information of Schematic Diagram --------- 40
13 Exploded View and Replacement Parts List ----------- 41

13.1. IC Data------------------------------------------------------ 41
13.2. Cabinet and Electric Parts ----------------------------- 45
13.3. Accessories and Packing Materials ----------------- 46
13.4. Replacement Parts List --------------------------------- 47