Table Of Contents - Panasonic KX-TG6841BXB Service Manual

TABLE OF CONTENTS

1 Safety Precautions----------------------------------------------- 5
1.1. For Service Technicians --------------------------------- 5
2 Warning -------------------------------------------------------------- 5
2.1. Battery Caution--------------------------------------------- 5
2.2. About Lead Free Solder (Pbf: Pb free)--------------- 5
2.2.1. Suggested PbF Solder ------------------------------ 6
2.3. Discarding of P. C. Board-------------------------------- 6
3 Specifications ----------------------------------------------------- 7
4 Technical Descriptions ----------------------------------------- 8
4.1. US-DECT Description ------------------------------------ 8
4.1.1. TDD Frame Format ---------------------------------- 8
4.1.2. TDMA system------------------------------------------ 8
4.1.3. Signal Flowchart in the Radio Parts-------------- 9
4.2. Block Diagram (Base Unit_Main)---------------------10
4.3. Block Diagram (Base Unit_RF Part) ----------------- 11
4.4. Circuit Operation (Base Unit) --------------------------12
4.4.1. BBIC (Base Band IC: IC501) ---------------------12
4.4.2. Flash Memory (IC601)------------------------------12
4.4.3. EEPROM (IC611) ------------------------------------12
4.4.4. Power Supply Circuit/Reset Circuit--------------13
4.4.5. Telephone Line Interface---------------------------15
4.4.6. Parallel Connection Detect Circuit/Auto
Disconnect Circuit -----------------------------------16
4.4.7. Calling Line Identification (Caller ID)/Call
Waiting Caller ID -------------------------------------17
4.5. Block Diagram (Handset)-------------------------------19
4.6. Block Diagram (Handset_RF Part)-------------------20
4.7. Circuit Operation (Handset)----------------------------21
4.7.1. Outline --------------------------------------------------21
4.7.2. Power Supply Circuit/Reset Circuit--------------21
4.7.3. Charge Circuit ----------------------------------------22
4.7.4. Battery Low/Power Down Detector--------------22
4.7.5. Speakerphone ----------------------------------------22
4.8. Behavior of Electric Power Failure -------------------23
4.9. Signal Route -----------------------------------------------24
5 Location of Controls and Components ------------------26
6 Installation Instructions ---------------------------------------26
7 Operating Instructions-----------------------------------------26
8 Test Mode ----------------------------------------------------------27
8.1. Engineering Mode ----------------------------------------27
8.1.1. Base Unit ----------------------------------------------27
8.1.2. Handset ------------------------------------------------29
9 Service Mode -----------------------------------------------------31
9.1. How to Clear User Setting (Handset Only)---------31
10 Troubleshooting Guide ----------------------------------------32
10.1. Troubleshooting Flowchart -----------------------------32
10.1.1. Check Power------------------------------------------33
10.1.2. Check Record ----------------------------------------34
10.1.3. Check Playback -------------------------------------37
10.1.4. Check Battery Charge ------------------------------37
10.1.5. Check Link---------------------------------------------38
10.1.6. Check the RF part -----------------------------------40
10.1.7. Registering a Handset to the Base Unit--------44
10.1.8. Deregistering a Handset ---------------------------44
10.1.9. Check Handset Transmission --------------------45
10.1.10. Check Handset Reception-------------------------45
10.1.11. Check Caller ID --------------------------------------45
11 Disassembly and Assembly Instructions ---------------46
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11.1. Disassembly Instructions------------------------------- 46
11.1.1. Base Unit ---------------------------------------------- 46
11.1.2. Handset ------------------------------------------------ 48
11.2. How to Replace the Base Unit LCD ----------------- 49
11.3. How to Replace the Handset LCD------------------- 51
12 Measurements and Adjustments -------------------------- 52
12.1. Equipment Required ------------------------------------ 52
12.2. The Setting Method of JIG----------------------------- 52
12.2.1. Connections (Base Unit) -------------------------- 52
12.2.2. Connections (Handset) ---------------------------- 53
12.2.3. How to install Batch file into P.C. ---------------- 54
12.2.4. Commands (Base Unit) ---------------------------- 55
12.2.5. Commands (Handset)------------------------------ 55
12.3. Adjustment Standard (Base Unit) -------------------- 56
12.3.1. Bottom View ------------------------------------------ 56
12.4. Adjustment Standard (Handset) ---------------------- 57
12.4.1. Component View ------------------------------------ 57
12.5. Things to Do after Replacing IC or X'tal ------------ 58
12.5.1. How to download the data ------------------------ 58
12.6. Frequency Table------------------------------------------ 60
13 Miscellaneous---------------------------------------------------- 61
13.1. How to Replace the LLP (Leadless Leadframe
Package) IC ----------------------------------------------- 61
13.1.1. Preparation-------------------------------------------- 61
13.1.2. Caution------------------------------------------------- 61
13.1.3. How to Remove the IC ----------------------------- 61
13.1.4. How to Install the IC -------------------------------- 62
13.2. How to Replace the Flat Package IC --------------- 63
13.2.1. Preparation-------------------------------------------- 63
13.2.2. How to Remove the IC ----------------------------- 63
13.2.3. How to Install the IC -------------------------------- 64
13.2.4. How to Remove a Solder Bridge ---------------- 64
13.3. Terminal Guide of the ICs, Transistors and
Diodes ------------------------------------------------------ 65
13.3.1. Base Unit ---------------------------------------------- 65
13.3.2. Handset ------------------------------------------------ 65
14 Schematic Diagram -------------------------------------------- 67
14.1. For Schematic Diagram -------------------------------- 67
14.1.1. Base Unit (Schematic Diagram (Base
Unit_Main)) ------------------------------------------- 67
14.1.2. Handset
(Handset_Main))------------------------------------- 67
14.2. Schematic Diagram (Base Unit_Main)-------------- 68
14.3. Schematic Diagram (Base Unit_Operation) ------- 70
14.4. Schematic Diagram (Base Unit_LED) -------------- 72
14.5. Schematic Diagram (Handset_Main) --------------- 74
15 Printed Circuit Board ------------------------------------------ 77
15.1. Circuit Board (Base Unit_Main) ---------------------- 77
15.1.1. Component View ------------------------------------ 77
15.1.2. Bottom View ------------------------------------------ 78
15.2. Circuit Board (Base Unit_Operation)---------------- 79
15.3. Circuit Board (Base Unit_LED) ----------------------- 79
15.4. Circuit Board (Handset_Main) ------------------------ 81
15.4.1. Component View ------------------------------------ 81
15.4.2. Bottom View ------------------------------------------ 82
16 Exploded View and Replacement Parts List ----------- 83
16.1. Cabinet and Electrical Parts (Base Unit) ----------- 83
16.2. Cabinet and Electrical Parts (Handset)------------- 84
3
KX-TG6841BXB/KX-TGA680BXB
(Schematic Diagram
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