KX-TG6551UAM, KX-TGA650RUM, KX-TGA651RUM - Panasonic Telephone Service Manual (repair manual). Page 3

3

PAGE

PAGE

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 (Base Unit_Main)---------------------- 7
4.2. Block Diagram (Base Unit_RF Part) ------------------ 8
4.3. Circuit Operation (Base Unit) --------------------------- 9
4.4. Block Diagram (Handset)-------------------------------15
4.5. Circuit Operation (Handset)----------------------------16
4.6. Circuit Operation (Charger Unit) ----------------------17
4.7. Signal Route -----------------------------------------------18

5 Location of Controls and Components ------------------20
6 Installation Instructions ---------------------------------------20
7 Operating Instructions-----------------------------------------20

7.1. For Service Hint-------------------------------------------20

8 Service Mode -----------------------------------------------------21

8.1. Engineering Mode ----------------------------------------21
8.2. Copying Phonebook Items when Repairing -------25
8.3. How to Clear User Setting------------------------------27

9 Troubleshooting Guide ----------------------------------------28

9.1. Troubleshooting Flowchart -----------------------------28
9.2. Troubleshooting by Symptom (Base Unit and

Charger Unit) ----------------------------------------------41

9.3. Troubleshooting by Symptom (Handset) -----------44

10 Disassembly and Assembly Instructions ---------------48

10.1. Disassembly Instructions -------------------------------48
10.2. How to Replace the Handset LCD -------------------52

11 Measurements and Adjustments---------------------------53

11.1. Equipment Required -------------------------------------53
11.2. The Setting Method of JIG (Base Unit) -------------53
11.3. Adjustment Standard (Base Unit)---------------------55
11.4. Adjustment Standard (Charger Unit)-----------------56
11.5. The Setting Method of JIG (Handset) ---------------57
11.6. Adjustment Standard (Handset) ----------------------59
11.7. Things to Do after Replacing IC or X'tal ------------60
11.8. RF Specification-------------------------------------------62
11.9. How to Check the Handset Speaker or

Receiver ----------------------------------------------------63

11.10. Frequency Table (MHz) ---------------------------------63

12 Miscellaneous ----------------------------------------------------64

12.1. How to Replace the Flat Package IC----------------64
12.2. How to Replace the LLP (Leadless Leadframe

Package) IC------------------------------------------------66

12.3. How to Replace the Shield Case ---------------------68
12.4. Terminal Guide of the ICs, Transistors, Diodes

and Electrolytic Capacitors-----------------------------70

13 Schematic Diagram ---------------------------------------------71

13.1. For Schematic Diagram---------------------------------71
13.2. Schematic Diagram (Base Unit) ----------------------72
13.3. Schematic Diagram (Base Unit_Operation) -------74
13.4. Schematic Diagram (Handset) ------------------------76
13.5. Schematic Diagram (Charger Unit) ------------------78

14 Printed Circuit Board-------------------------------------------79

14.1. Circuit Board (Base Unit_Main) -----------------------79

14.2. Circuit Board (Base Unit_Operation)---------------- 81
14.3. Circuit Board (Handset) -------------------------------- 83
14.4. Circuit Board (Charger Unit)--------------------------- 85

15 Exploded View and Replacement Parts List ----------- 86

15.1. Cabinet and Electrical Parts (Base Unit) ----------- 86
15.2. Cabinet and Electrical Parts (Handset)------------- 87
15.3. Cabinet and Electrical Parts (Charger Unit) ------- 88
15.4. Accessories------------------------------------------------ 89
15.5. Replacement Part List ---------------------------------- 90