Table Of Contents - Panasonic KX-TG6841B 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)-------------- 6
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. Circuit Operation (Charger Unit) ----------------------23
4.10. 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
KX-TG6841B/KX-TG6842B/KX-TG6843B/KX-TG6844B/KX-TG6845B/KX-TG6873B/KX-TGA680B
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11 Disassembly and Assembly Instructions--------------- 46
11.1. Disassembly Instructions------------------------------- 46
11.1.1. Base Unit ---------------------------------------------- 46
11.1.2. Handset ------------------------------------------------ 48
11.1.3. Charger Unit ------------------------------------------ 49
11.2. How to Replace the Base Unit LCD ----------------- 50
11.3. How to Replace the Handset LCD------------------- 52
12 Measurements and Adjustments -------------------------- 53
12.1. Equipment Required ------------------------------------ 53
12.2. The Setting Method of JIG----------------------------- 53
12.2.1. Connections (Base Unit) -------------------------- 53
12.2.2. Connections (Handset) ---------------------------- 54
12.2.3. How to install Batch file into P.C. ---------------- 55
12.2.4. Commands (Base Unit) ---------------------------- 56
12.2.5. Commands (Handset)------------------------------ 56
12.3. Adjustment Standard (Base Unit) -------------------- 57
12.3.1. Bottom View ------------------------------------------ 57
12.4. Adjustment Standard (Handset) ---------------------- 58
12.4.1. Component View ------------------------------------ 58
12.5. Things to Do after Replacing IC or X'tal ------------ 59
12.5.1. How to download the data ------------------------ 59
12.6. Frequency Table------------------------------------------ 61
13 Miscellaneous---------------------------------------------------- 62
13.1. How to Replace the LLP (Leadless Leadframe
Package) IC ----------------------------------------------- 62
13.1.1. Preparation-------------------------------------------- 62
13.1.2. Caution------------------------------------------------- 62
13.1.3. How to Remove the IC ----------------------------- 62
13.1.4. How to Install the IC -------------------------------- 63
13.2. How to Replace the Flat Package IC --------------- 64
13.2.1. Preparation-------------------------------------------- 64
13.2.2. How to Remove the IC ----------------------------- 64
13.2.3. How to Install the IC -------------------------------- 65
13.2.4. How to Remove a Solder Bridge ---------------- 65
13.3. Terminal Guide of the ICs, Transistors and
Diodes ------------------------------------------------------ 66
13.3.1. Base Unit ---------------------------------------------- 66
13.3.2. Handset ------------------------------------------------ 66
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) -------------- 71
14.5. Schematic Diagram (Handset_Main) --------------- 72
15 Printed Circuit Board ------------------------------------------ 75
15.1. Circuit Board (Base Unit_Main) ---------------------- 75
15.1.1. Component View ------------------------------------ 75
15.1.2. Bottom View ------------------------------------------ 76
15.2. Circuit Board (Base Unit_Operation)---------------- 77
15.3. Circuit Board (Base Unit_LED) ----------------------- 77
15.4. Circuit Board (Handset_Main) ------------------------ 79
15.4.1. Component View ------------------------------------ 79
15.4.2. Bottom View ------------------------------------------ 80
16 Exploded View and Replacement Parts List ----------- 81
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(Schematic Diagram