Panasonic KX-TCA256X, Service Manual

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2
KX-TCA256X
TABLE OF CONTENTS
PAGE PAGE
1 Safety Precautions ----------------------------------------------- 3
1.1. For Service Technicians ----------------------------------3
1.2. Disposal Cautions------------------------------------------3
2 Warning -------------------------------------------------------------- 4
2.1. About Lead Free Solder (PbF: Pb free) --------------4
2.2. Battery Caution ---------------------------------------------4
3 Specifications ------------------------------------------------------ 5
4 Technical Descriptions ------------------------------------------ 6
4.1. Block Diagram (Handset) --------------------------------6
4.2. Circuit Operation (Handset) -----------------------------7
4.3. Block Diagram (RF Unit) ---------------------------------8
4.4. Circuit Operation (RF Unit) ------------------------------9
4.5. Signal Route-------------------------------------------------9
5 Location of Controls and Components ------------------ 10
5.1. Location of Controls (Handset) ----------------------- 10
6 Installation Instructions --------------------------------------- 11
6.1. Connection------------------------------------------------- 11
6.2. Battery ------------------------------------------------------ 11
7 Operation Instructions ---------------------------------------- 13
7.1. Soft Key Display ------------------------------------------ 13
7.2. Settings Menu Chart (Handset) ---------------------- 14
7.3. Key Lock---------------------------------------------------- 15
7.4. Selecting the Display Language---------------------- 15
7.5. DISPLAY --------------------------------------------------- 15
8 Troubleshooting Guide ---------------------------------------- 22
8.1. Check Power (Handset) -------------------------------- 23
8.2. RF Unit------------------------------------------------------ 23
8.3. Check Battery Charge (Handset) -------------------- 24
8.4. Check Link (Handset) ----------------------------------- 26
8.5. Check Handset Transmission------------------------- 27
8.6. Check Handset Reception ----------------------------- 27
8.7. Bell Reception (Handset) ------------------------------ 27
9 Service Fixture & Tools --------------------------------------- 28
10 Disassembly and Assembly Instructions --------------- 29
10.1. Handset----------------------------------------------------- 29
10.2. Charger Unit----------------------------------------------- 30
11 Measurements and Adjustments -------------------------- 31
11.1. Check Procedure (Handset)--------------------------- 31
11.2. Adjustments (Handset and Charger Unit)---------- 36
11.3. RF Specification (Handset) ---------------------------- 41
11.4. How to Check the Handset Speaker ---------------- 42
11.5. How to Check the Handset Receiver --------------- 42
11.6. Frequency Table (MHz)--------------------------------- 43
11.7. How To Replace a Flat Package IC ----------------- 44
12 Schematic Diagram --------------------------------------------- 45
12.1. For Schematic Diagram -------------------------------- 45
12.2. Schematic Diagram (Handset)------------------------ 46
12.3. Handset (RF Unit)---------------------------------------- 48
12.4. Charger Unit----------------------------------------------- 49
13 Printed Circuit Board ------------------------------------------ 50
13.1. Handset----------------------------------------------------- 50
13.2. Charger Unit----------------------------------------------- 51
14 Appendix Information of Schematic Diagram --------- 52
14.1. CPU Data (Handset) ------------------------------------ 52
14.2. Terminal Guide of the ICs, Transistors and
Diodes------------------------------------------------------- 54
15 Exploded View and Replacement Parts List ----------- 55
15.1. Cabinet and electrical Parts Location
(Handset) -------------------------------------------------- 55
15.2. Accessories and Packing Materials----------------- 57
15.3. Replacement Part List---------------------------------- 58