KX-TG6541RUB, KX-TGA651RUB, KX-TGA405RUB - 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) ------------------------------ 7
4.2. Circuit Operation (Base Unit) --------------------------- 8
4.3. Block Diagram (Handset)-------------------------------11
4.4. Circuit Operation (Handset)----------------------------12
4.5. Circuit Operation (Charger Unit) ----------------------13
4.6. Block Diagram (Range Extender_Main) ------------14
4.7. Block Diagram (Range Extender_RF Part) --------15
4.8. Circuit Operation (Range Extender) -----------------16
4.9. Signal Route -----------------------------------------------17

5 Location of Controls and Components ------------------19
6 Installation Instructions ---------------------------------------19
7 Operating Instructions-----------------------------------------19

7.1. For Service Hint-------------------------------------------19

8 Service Mode -----------------------------------------------------20

8.1. Engineering Mode ----------------------------------------20
8.2. Copying Phonebook Items when Repairing -------24
8.3. How to Clear User Setting------------------------------26

9 Troubleshooting Guide ----------------------------------------27

9.1. Troubleshooting Flowchart -----------------------------27
9.2. Troubleshooting by Symptom (Base Unit and

Charger Unit) ----------------------------------------------40

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 -------------------53

11 Measurements and Adjustments---------------------------54

11.1. Equipment Required -------------------------------------54
11.2. The Setting Method of JIG (Base Unit) -------------54
11.3. Adjustment Standard (Base Unit)---------------------56
11.4. Adjustment Standard (Charger Unit)-----------------57
11.5. The Setting Method of JIG (Handset) ---------------58
11.6. Adjustment Standard (Handset) ----------------------61
11.7. Adjustment Standard (Range Extender) ------------62
11.8. Things to Do after Replacing IC or X'tal ------------63
11.9. RF Specification-------------------------------------------66

11.10. How to Check the Handset Speaker or

Receiver ----------------------------------------------------67

11.11. Frequency Table (MHz) ---------------------------------67

12 Miscellaneous ----------------------------------------------------68

12.1. How to Replace the Flat Package IC----------------68
12.2. How to Replace the Shield Case ---------------------70
12.3. Terminal Guide of the ICs, Transistors, Diodes

and Electrolytic Capacitors-----------------------------72

13 Schematic Diagram ---------------------------------------------73

13.1. For Schematic Diagram---------------------------------73
13.2. Schematic Diagram (Base Unit) ----------------------74
13.3. Schematic Diagram (Base Unit_Operation) -------76
13.4. Schematic Diagram (Handset) ------------------------78
13.5. Schematic Diagram (Charger Unit) ------------------80
13.6. Schematic Diagram (Range Extender)--------------82

14 Printed Circuit Board ------------------------------------------ 85

14.1. Circuit Board (Base Unit_Main) ---------------------- 85
14.2. Circuit Board (Base Unit_Operation)---------------- 87
14.3. Circuit Board (Handset) -------------------------------- 89
14.4. Circuit Board (Charger Unit)--------------------------- 91
14.5. Circuit Board (Range Extender) ---------------------- 93

15 Exploded View and Replacement Parts List ----------- 95

15.1. Cabinet and Electrical Parts (Base Unit) ----------- 95
15.2. Cabinet and Electrical Parts (Handset)------------- 96
15.3. Cabinet and Electrical Parts (Charger Unit) ------- 97
15.4. Cabinet and Electrical Parts (Range

Extender)--------------------------------------------------- 98

15.5. Accessories------------------------------------------------ 99
15.6. Replacement Part List -------------------------------- 100