KX-TU301RUME - 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 (Handset)-------------------------------- 7
4.2. Circuit Operation (Handset)----------------------------- 8
4.3. Circuit Operation (Charger Unit) ----------------------10
4.4. Signal Route -----------------------------------------------11

5 Location of Controls and Components ------------------12
6 Installation Instructions ---------------------------------------12
7 Operating Instructions-----------------------------------------12

7.1. For Service Hint-------------------------------------------12

8 Troubleshooting Guide ----------------------------------------13

8.1. Troubleshooting Flowchart -----------------------------13
8.2. Troubleshooting by Symptom (Handset and

Charger Unit) ----------------------------------------------20

9 Disassembly and Assembly Instructions ---------------23

9.1. Disassembly Instructions -------------------------------24
9.2. How to Replace the Handset LCD -------------------26

10 Measurements and Adjustments---------------------------27

10.1. Handset Reference Drawing---------------------------27
10.2. Charger Handset Reference Drawing---------------28
10.3. RF Specification-------------------------------------------29
10.4. How to Check the Handset Speaker or

Receiver ----------------------------------------------------30

11 Miscellaneous ----------------------------------------------------31

11.1. Terminal Guide of the ICs, Transistors and

Diodes -------------------------------------------------------31

12 Schematic Diagram ---------------------------------------------33

12.1. For Schematic Diagram---------------------------------33
12.2. Schematic Diagram (Handset) ------------------------34
12.3. Schematic Diagram (Charger Unit) ------------------36

13 Printed Circuit Board-------------------------------------------37

13.1. Circuit Board (Handset) ---------------------------------37
13.2. Circuit Board (Charger Unit) ---------------------------39

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

14.1. Cabinet and Electrical Parts (Handset) -------------41
14.2. Cabinet and Electric Parts (Charger Unit)----------42
14.3. Accessories ------------------------------------------------43
14.4. Replacement Part List-----------------------------------44