Panasonic KX-TS820MXB, Service Manual

Page: 3 / 29

3
KX-TS820MXB/KX-TS820MXW
TABLE OF CONTENTS
PAGE PAGE
1 Safety Precautions ----------------------------------------------- 4
1.1. For Service Technicians --------------------------------- 4
2 Warning -------------------------------------------------------------- 4
2.1. About Lead Free Solder (Pbf: Pb free)--------------- 4
3 Specifications ----------------------------------------------------- 6
4 Technical Descriptions ----------------------------------------- 7
4.1. Block Diagram---------------------------------------------- 7
4.2. Circuit Operation------------------------------------------- 8
5 Location of Controls and Components ------------------- 9
6 Installation Instructions ---------------------------------------- 9
7 Operating Instructions ------------------------------------------ 9
7.1. For Service Hint-------------------------------------------- 9
8 Troubleshooting Guide ---------------------------------------- 10
8.1. Service Hints-----------------------------------------------10
8.2. Pulse Dialing Problems ---------------------------------10
8.3. Tone Dialing Problems ----------------------------------11
8.4. No Ringing Sound When Ring Signal is Input ---- 11
9 Disassembly and Assembly Instructions --------------- 12
9.1. Disassembly Instructions -------------------------------12
10 Miscellaneous ---------------------------------------------------- 14
10.1. How to Replace the Flat Package IC ----------------14
10.2. Terminal Guide of the ICs, Transistors and
Diodes -------------------------------------------------------16
11 Schematic Diagram --------------------------------------------- 17
11.1. For Schematic Diagram---------------------------------17
11.2. Schematic Diagram (Main)-----------------------------18
11.3. Schematic Diagram (Operation) ----------------------20
12 Printed Circuit Board ------------------------------------------- 21
12.1. Circuit Board (Main)--------------------------------------21
12.2. Circuit Board (Operation) -------------------------------23
13 Exploded View and Replacement Parts List ----------- 25
13.1. Cabinet and Electrical Parts ---------------------------25
13.2. Accessories and Packing Materials------------------26
13.3. Replacement Part List-----------------------------------27