KX-TS2356UAB, KX-TS2356UAW (serv.man3) - Panasonic Telephone Service Manual (repair manual). Page 3

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1 Safety Precautions----------------------------------------------- 4

1.1. For Service Technicians --------------------------------- 4

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

2.1. Battery Caution--------------------------------------------- 4
2.2. About Lead Free Solder (PbF: Pb free)-------------- 4
2.3. Discarding of P.C. Board--------------------------------- 5

3 Specifications ----------------------------------------------------- 6
4 Technical Descriptions ----------------------------------------- 7

4.1. Block Diagram---------------------------------------------- 7
4.2. Circuit Operation------------------------------------------- 8

5 Location of Controls and Components ------------------11

5.1. Controls -----------------------------------------------------11
5.2. Display ------------------------------------------------------11

6 Installation Instructions ---------------------------------------12

6.1. Connections------------------------------------------------12
6.2. Connecting a Communication Device---------------12
6.3. Battery-------------------------------------------------------13

7 Operating Instructions-----------------------------------------14

7.1. Programmable Settings ---------------------------------14
7.2. Dial Lock ----------------------------------------------------15
7.3. Call Restriction --------------------------------------------15
7.4. Troubleshooting-------------------------------------------16

8 Troubleshooting Guide ----------------------------------------18

8.1. Service Hints-----------------------------------------------18
8.2. Pulse Dialing Problems ---------------------------------18
8.3. Tone Dialing Problems (Handset) --------------------19
8.4. No Ringing Sound When Ring Signal is Input ----19

9 Disassembly and Assembly Instructions ---------------20

9.1. Disassembly Instructions -------------------------------20

10 Miscellaneous ----------------------------------------------------22

10.1. IC Block diagram -----------------------------------------22
10.2. How to Replace the Flat Package IC----------------28
10.3. Terminal Guide of the ICs, Transistors and

Diodes -------------------------------------------------------30

11 Schematic Diagram ---------------------------------------------31

11.1. For Schematic Diagram---------------------------------31
11.2. Schematic Diagram (Main)-----------------------------32
11.3. Schematic Diagram (Operation) ----------------------34

12 Printed Circuit Board-------------------------------------------37

12.1. Circuit Board (Main)--------------------------------------37
12.2. Circuit Board (Operation) -------------------------------39

13 Exploded View and Replacement Parts List -----------41

13.1. Cabinet and Electrical Parts ---------------------------41
13.2. Accessories and Packing Materials------------------42
13.3. Replacement Part List-----------------------------------43