KX-TGA915EXS - 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. 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
4.3. Signal Route -----------------------------------------------12

5 Location of Controls and Components ------------------13

5.1. Controls -----------------------------------------------------13

6 Installation Instructions ---------------------------------------14

6.1. System Requirements for Your Computer ---------14
6.2. Connecting to a Computer -----------------------------14

7 Operation Instructions-----------------------------------------15

7.1. Symbols and Screen Shots Used in these

Operating Instructions -----------------------------------15

7.2. Installing and Setting up the USB Adaptor

Utility ---------------------------------------------------------15

7.3. Confirming the USB Adaptor Works Properly -----16
7.4. Soft Key and Display Menus---------------------------17
7.5. Deregistering the USB Adaptor -----------------------17
7.6. Uninstalling the USB Adaptor Utility -----------------17

8 Test Mode ----------------------------------------------------------18

8.1. Check the Voice on Windows PC --------------------18

9 Service Mode -----------------------------------------------------19

9.1. How to Clear User Setting------------------------------19

10 Troubleshooting Guide ----------------------------------------20

10.1. Troubleshooting Flowchart -----------------------------20
10.2. Troubleshooting by Symptom (USB Adaptor) -----22
10.3. How to Replace the Flat Package IC----------------25

11 Disassembly and Assembly Instructions ---------------27

11.1. Disassembly Instructions -------------------------------27

12 Measurements and Adjustments---------------------------28

12.1. The Setting Method of JIG (USB Adaptor)---------28
12.2. Adjustment Standard (USB Adaptor) ----------------30
12.3. Things to Do after Replacing IC ----------------------31
12.4. RF Specification-------------------------------------------31

13 Schematic Diagram ---------------------------------------------33

13.1. For Schematic Diagram---------------------------------33
13.2. Schematic Diagram --------------------------------------34

14 Printed Circuit Board-------------------------------------------36

14.1. Circuit Board -----------------------------------------------36

15 Appendix Information of Schematic Diagram ---------37

15.1. CPU Data (USB Adaptor) ------------------------------37
15.2. Terminal Guide of the ICs, Transistors and

Diodes -------------------------------------------------------40

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

16.1. Cabinet and Electrical Parts ---------------------------41
16.2. Accessories and Packing Materials------------------42
16.3. Replacement Parts List ---------------------------------43