Panasonic KX-TCA275CE, Service Manual

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2
KX-TCA275CE
TABLE OF CONTENTS
PAGE PAGE
1 Safety Precautions ----------------------------------------------- 4
1.1. For Service Technicians ---------------------------------4
2 Warning -------------------------------------------------------------- 4
2.1. About Lead Free Solder (PbF: Pb free) --------------4
2.1.1. Suggested PbF Solder -------------------------------4
2.1.2. Information for Users on Collection and
Disposal of Old Equipment and used
Batteries -------------------------------------------------5
2.2. Battery Caution ---------------------------------------------5
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
4.2.1. Outline----------------------------------------------------8
4.2.2. Power Supply Circuit/Reset Circuit ---------------8
4.2.3. Charge Circuit (Include Charger)------------------9
4.2.4. Battery Low/Power Down Detector ---------------9
4.2.5. TX Audio Path---------------------------------------- 10
4.2.6. RX Audio Path --------------------------------------- 12
4.2.7. Ringer Circuit ----------------------------------------- 13
4.2.8. Key Click Sound Circuit---------------------------- 13
4.2.9. Vibrator Circuit --------------------------------------- 14
5 Location of Controls and Components ------------------ 15
5.1. Handset----------------------------------------------------- 15
6 Installation Instructions --------------------------------------- 17
6.1. Charger Connection ------------------------------------- 17
6.2. Battery ------------------------------------------------------ 17
6.2.1. Battery Installation ---------------------------------- 17
6.2.2. Charging the Battery-------------------------------- 17
6.2.3. Battery Information---------------------------------- 18
6.2.4. Low Battery Warning ------------------------------- 18
6.2.5. Replacing the Batteries ---------------------------- 18
7 Operating Instructions ---------------------------------------- 19
7.1. Soft Keys --------------------------------------------------- 19
7.2. Handset Setting Menu Layout ------------------------ 21
7.3. Key Lock---------------------------------------------------- 22
7.4. Selecting the Display Language---------------------- 22
7.5. DISPLAY --------------------------------------------------- 23
7.6. Function Menus------------------------------------------- 24
7.6.1. Main Menu-While in Standby Mode------------- 24
7.6.2. Sub Menu-While Off-hook/During a
Conversation ----------------------------------------- 24
7.7. Function Keys --------------------------------------------- 25
7.8. Flexible Keys ---------------------------------------------- 26
7.9. Caller ID ---------------------------------------------------- 27
7.10. Character Mode Table ---------------------------------- 28
8 Troubleshooting Guide ---------------------------------------- 29
8.1. Power Trouble (Handset) ------------------------------ 30
8.1.1. Power Does Not Go On---------------------------- 30
8.2. Battery Charge Trouble (Handset)------------------- 32
8.2.1. Charge On -------------------------------------------- 32
8.2.2. Charge Off--------------------------------------------- 33
8.3. LED Trouble (Handset) --------------------------------- 34
8.3.1. Key Back-Light --------------------------------------- 34
8.3.2. Charging And Ringing LED ----------------------- 34
8.4. Vibrator Trouble (Handset) ---------------------------- 35
8.5. Ringer Trouble (Handset) ------------------------------ 35
8.6. No Voice Transmission--------------------------------- 36
8.7. No Voice Reception ------------------------------------- 37
8.7.1. Talk Mode --------------------------------------------- 37
8.7.2. Speakerphone Mode ------------------------------- 38
8.8. Password Trouble --------------------------------------- 38
8.8.1. User Password is forgotten.---------------------- 38
8.8.2. System Lock Password is forgotten. ----------- 38
9 Service Fixture & Tools --------------------------------------- 39
10 Disassembly and Assembly Instructions -------------- 40
10.1. Handset ---------------------------------------------------- 40
10.2. Charger Unit ---------------------------------------------- 40
11 Measurements and Adjustments -------------------------- 41
11.1. Check Procedure (Handset) -------------------------- 41
11.1.1. Preparation ------------------------------------------- 41
11.1.2. PC Setting -------------------------------------------- 41
11.1.3. Download Manual----------------------------------- 42
11.2. Adjustments (Handset and Charger Unit) --------- 47
11.2.1. Adjustment (Handset)------------------------------ 47
11.2.2. Adjustment Standard (Handset)----------------- 49
11.2.3. Adjustment (Charger Unit)------------------------ 51
11.2.4. Adjustment Standard (Charger Unit) ----------- 51
11.3. RF Specification (Handset)---------------------------- 51
11.4. How to Check the Handset Speaker---------------- 52
11.5. How to Check the Handset Receiver --------------- 52
11.6. Frequency Table (MHz) -------------------------------- 53
12 Miscellaneous --------------------------------------------------- 54
12.1. How To Replace a Flat Package IC----------------- 54
12.1.1. Preparation ------------------------------------------- 54
12.1.2. Removal Procedure -------------------------------- 54
12.1.3. Procedure--------------------------------------------- 54
12.1.4. Removing Solder From Between Pins--------- 54
12.2. Terminal Guide of the ICs Transistors and
Diodes ------------------------------------------------------ 55
12.2.1. Handset ----------------------------------------------- 55
12.2.2. Charger Unit------------------------------------------ 55
13 Schematic Diagram -------------------------------------------- 56
13.1. Handset ---------------------------------------------------- 56
13.2. Handset (RF Unit) --------------------------------------- 58
13.3. Charger Unit ---------------------------------------------- 59
14 Printed Circuit Board ------------------------------------------ 60
14.1. Handset ---------------------------------------------------- 60
14.1.1. Component View------------------------------------ 60
14.1.2. Flow Solder Side View----------------------------- 61
14.2. Charger Unit ---------------------------------------------- 62
14.2.1. Component View------------------------------------ 62
14.2.2. Flow Solder Side View----------------------------- 62
15 Appendix Information of Schematic Diagram -------- 62
16 Exploded View and Replacement Parts List ----------- 63
16.1. CPU Data (Handset) ------------------------------------ 63
16.1.1. IC3 (BBIC) -------------------------------------------- 63
16.2. Cabinet and electrical Parts Location--------------- 65
16.2.1. Handset ----------------------------------------------- 65
16.2.2. Charger Unit------------------------------------------ 66
16.2.3. Accessories and Packing Materials ------------ 67
16.3. Replacement Parts List -------------------------------- 68
16.3.1. Cabinet and Electrical Parts (Handset)-------- 68
16.3.2. Cabinet and Electrical Parts (Charger unit) -- 68
16.3.3. Accessories and Packing Materials ------------ 68