Read Panasonic KX-TG6811RUB / KX-TG6811RUM / KX-TG6812RUB / KX-TG6821RUB / KX-TG6821RUM / KX-TG6822RUM / KX-TG6881RUB / KX-TG6891RUB / KX-TGA681RUB / KX-TGA681RUM / KX-TGA20EXB Service Manual online
ORDER NO. KM41304671CE
Telephone Equipment
Model No.
KX-TG6811RUB
KX-TG6811RUM
KX-TG6812RUB
KX-TG6821RUB
KX-TG6821RUM
KX-TG6822RUM
KX-TG6881RUB
KX-TG6891RUB
KX-TGA681RUB
KX-TGA681RUM
KX-TGA20EXB
KX-TG6811RUM
KX-TG6812RUB
KX-TG6821RUB
KX-TG6821RUM
KX-TG6822RUM
KX-TG6881RUB
KX-TG6891RUB
KX-TGA681RUB
KX-TGA681RUM
KX-TGA20EXB
Digital Cordless Phone
Digital Cordless Answering System
Digital Cordless Answering System
B: Black Version
M: Metic Grey Version
(for Russia)
(for Belarus)
M: Metic Grey Version
(for Russia)
(for Belarus)
KX-TGA681
(Handset)
KX-TG6811
(Base Unit)
KX-TG6821
(Base Unit)
(Base Unit)
(Charger Unit)
Model No
Base Unit
Handset
Charger Unit
Expandable
1
Configuration for each model
1
Key Finder
1
1
*KX-TGA681 is an optional accessory, which contains a
handset and a charger.
handset and a charger.
KX-TG6811
KX-TG6812
KX-TG6821
KX-TG6891
KX-TGA681*
1(TG6811)
1(TG6811)
1(TG6821)
1(TG6821)
1(TGA681)
2(TGA681)
1(TGA681)
1(TGA681)
1(TGA681)
Up to 6
Up to 6
Up to 6
Up to 6
1
KX-TG6881
1(TG6811) 1(TGA681)
Up to 6
KX-TG6822
1(TG6821) 2(TGA681)
Up to 6
(Key Finder KX-TG6881/91 only)
KX-TGA20
2
KX-TG6811RUB/KX-TG6811RUM/KX-TG6812RUB/KX-TG6821RUB/KX-TG6821RUM/KX-TG6822RUM/KX-TG6881RUB/KX-TG6891RUB/KX-TGA681RUB/KX-TGA681RUM/KX-TGA20EXB
WARNING
This service information is designed for experienced repair technicians only and is not designed for use by the general
public. It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting
to service a product. Products powered by electricity should be serviced or repaired only by experienced professional
technicians. Any attempt to service or repair the product or products dealt with in this service information by anyone
else could result in serious injury or death.
public. It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting
to service a product. Products powered by electricity should be serviced or repaired only by experienced professional
technicians. Any attempt to service or repair the product or products dealt with in this service information by anyone
else could result in serious injury or death.
IMPORTANT SAFETY NOTICE
There are special components used in this equipment which are important for safety. These parts are marked by
in the Schematic Diagrams, Circuit Board Diagrams, Exploded Views and Replacement Parts List. It is essential that
these critical parts should be replaced with manufacturer's specified parts to prevent shock, fire or other hazards.
Do not modify the original design without permission of manufacturer.
in the Schematic Diagrams, Circuit Board Diagrams, Exploded Views and Replacement Parts List. It is essential that
these critical parts should be replaced with manufacturer's specified parts to prevent shock, fire or other hazards.
Do not modify the original design without permission of manufacturer.
IMPORTANT INFORMATION ABOUT LEAD FREE, (PbF), SOLDERING
If lead free solder was used in the manufacture of this product, the printed circuit boards will be marked PbF.
Standard leaded, (Pb), solder can be used as usual on boards without the PbF mark.
When this mark does appear, please read and follow the special instructions described in this manual on the
use of PbF and how it might be permissible to use Pb solder during service and repair work.
Standard leaded, (Pb), solder can be used as usual on boards without the PbF mark.
When this mark does appear, please read and follow the special instructions described in this manual on the
use of PbF and how it might be permissible to use Pb solder during service and repair work.
L When you note the serial number, write down all 11 digits. The serial number may be found on the bottom of the unit.
L The illustrations in this Service Manual may vary slightly from the actual product.
L The illustrations in this Service Manual may vary slightly from the actual product.
3
KX-TG6811RUB/KX-TG6811RUM/KX-TG6812RUB/KX-TG6821RUB/KX-TG6821RUM/KX-TG6822RUM/KX-TG6881RUB/KX-TG6891RUB/KX-TGA681RUB/KX-TGA681RUM/KX-TGA20EXB
TABLE OF CONTENTS
PAGE
PAGE
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. 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 Technical Descriptions ----------------------------------------- 8
4.1. Block Diagram (Base Unit) ------------------------------ 8
4.2. Circuit Operation (Base Unit) --------------------------- 9
4.2. Circuit Operation (Base Unit) --------------------------- 9
4.2.1. Outline --------------------------------------------------- 9
4.3. Block Diagram (Base Unit RF Part)------------------10
4.4. Circuit Operation (Base Unit) -------------------------- 11
4.4. Circuit Operation (Base Unit) -------------------------- 11
4.4.1. BBIC (Base Band IC: IC501) --------------------- 11
4.4.2. Flash Memory (IC601) (for KX-TG6821
4.4.2. Flash Memory (IC601) (for KX-TG6821
only) ----------------------------------------------------- 11
4.4.3. EEPROM (IC611) ------------------------------------ 11
4.4.4. Telephone Line Interface---------------------------12
4.4.5. Power Supply Circuit--------------------------------13
4.4.4. Telephone Line Interface---------------------------12
4.4.5. Power Supply Circuit--------------------------------13
4.5. Block Diagram (Handset)-------------------------------15
4.6. Circuit Operation (Handset)----------------------------16
4.6. Circuit Operation (Handset)----------------------------16
4.6.1. Outline --------------------------------------------------16
4.6.2. Power Supply Circuit/Reset Circuit--------------16
4.6.3. Charge Circuit ----------------------------------------16
4.6.4. Battery Low/Power Down Detector--------------16
4.6.5. Speakerphone ----------------------------------------16
4.6.2. Power Supply Circuit/Reset Circuit--------------16
4.6.3. Charge Circuit ----------------------------------------16
4.6.4. Battery Low/Power Down Detector--------------16
4.6.5. Speakerphone ----------------------------------------16
4.7. Behavior of Electric Power Failure -------------------17
4.7.1. Supply from handset --------------------------------17
4.7.2. Supply from large capacitor -----------------------17
4.7.2. Supply from large capacitor -----------------------17
4.8. Signal Route -----------------------------------------------18
5 Location of Controls and Components ------------------20
6 Installation Instructions ---------------------------------------20
7 Operating Instructions-----------------------------------------20
6 Installation Instructions ---------------------------------------20
7 Operating Instructions-----------------------------------------20
7.1. For Service Hint-------------------------------------------20
8 Service Mode -----------------------------------------------------21
8.1. Engineering Mode ----------------------------------------21
8.1.1. Base Unit ----------------------------------------------21
8.1.2. Handset ------------------------------------------------23
8.1.2. Handset ------------------------------------------------23
8.2. EEPROM LAYOUT (Handset)-------------------------25
8.2.1. Scope ---------------------------------------------------25
8.2.2. Introduction --------------------------------------------25
8.2.3. EEPROM contents ----------------------------------25
8.2.2. Introduction --------------------------------------------25
8.2.3. EEPROM contents ----------------------------------25
8.3. How to Clear User Setting------------------------------26
8.3.1. Resetting both base unit and handset----------26
8.3.2. Resetting only handset -----------------------------26
8.3.2. Resetting only handset -----------------------------26
9 Troubleshooting Guide ----------------------------------------27
9.1. Troubleshooting Flowchart -----------------------------27
9.1.1. Check Power------------------------------------------28
9.1.2. Check Battery Charge ------------------------------29
9.1.3. Check Link---------------------------------------------30
9.1.4. Check the RF part -----------------------------------33
9.1.5. Check Handset Transmission --------------------36
9.1.6. Check Handset Reception-------------------------36
9.1.7. Check Caller ID --------------------------------------36
9.1.8. Bell Reception ----------------------------------------37
9.1.9. Check TAM Operation (for KX-TG6821
9.1.2. Check Battery Charge ------------------------------29
9.1.3. Check Link---------------------------------------------30
9.1.4. Check the RF part -----------------------------------33
9.1.5. Check Handset Transmission --------------------36
9.1.6. Check Handset Reception-------------------------36
9.1.7. Check Caller ID --------------------------------------36
9.1.8. Bell Reception ----------------------------------------37
9.1.9. Check TAM Operation (for KX-TG6821
only) -----------------------------------------------------37
9.1.10. Power failure mode --------------------------------- 38
9.2. Troubleshooting by Symptom (Base Unit) --------- 39
9.2.1. Check Point (Base Unit) --------------------------- 39
9.3. Troubleshooting by Symptom (Handset) ----------- 41
9.3.1. Check Point (Handset) ----------------------------- 41
9.3.2. Troubleshooting for Speakerphone ------------- 44
9.3.2. Troubleshooting for Speakerphone ------------- 44
10 Disassembly and Assembly Instructions--------------- 45
10.1. Disassembly Instructions------------------------------- 45
10.1.1. Base Unit ---------------------------------------------- 45
10.1.2. Handset ------------------------------------------------ 49
10.1.3. Charger Unit ------------------------------------------ 50
10.1.2. Handset ------------------------------------------------ 49
10.1.3. Charger Unit ------------------------------------------ 50
10.2. How to Replace the Handset LCD------------------- 51
11 Measurements and Adjustments -------------------------- 52
11.1. Equipment Required ------------------------------------ 52
11.2. The Setting Method of JIG (Base Unit) ------------- 52
11.2. The Setting Method of JIG (Base Unit) ------------- 52
11.2.1. Connections ------------------------------------------ 52
11.2.2. How to install Batch file into P.C. ---------------- 53
11.2.3. Commands-------------------------------------------- 53
11.2.2. How to install Batch file into P.C. ---------------- 53
11.2.3. Commands-------------------------------------------- 53
11.3. Adjustment Standard (Base Unit) -------------------- 54
11.3.1. Bottom View ------------------------------------------ 54
11.4. The Setting Method of JIG (Handset)--------------- 55
11.4.1. Connections ------------------------------------------ 55
11.4.2. How to install Batch file into P.C. ---------------- 56
11.4.3. Commands-------------------------------------------- 56
11.4.2. How to install Batch file into P.C. ---------------- 56
11.4.3. Commands-------------------------------------------- 56
11.5. Adjustment Standard (Handset) ---------------------- 57
11.5.1. Component View ------------------------------------ 57
11.6. Things to Do after Replacing IC or X'tal ------------ 58
11.6.1. How to download the data ------------------------ 58
11.7. RF Specification ------------------------------------------ 60
11.7.1. Base Unit ---------------------------------------------- 60
11.7.2. Handset ------------------------------------------------ 60
11.7.2. Handset ------------------------------------------------ 60
11.8. How to Check the Handset Speaker or
Receiver ---------------------------------------------------- 61
11.9. Frequency Table (MHz)--------------------------------- 61
12 Miscellaneous---------------------------------------------------- 62
12.1. How to Replace the Flat Package IC --------------- 62
12.1.1. Preparation-------------------------------------------- 62
12.1.2. How to Remove the IC ----------------------------- 62
12.1.3. How to Install the IC -------------------------------- 63
12.1.4. How to Remove a Solder Bridge ---------------- 63
12.1.2. How to Remove the IC ----------------------------- 62
12.1.3. How to Install the IC -------------------------------- 63
12.1.4. How to Remove a Solder Bridge ---------------- 63
12.2. How to Replace the Shield Case--------------------- 64
12.2.1. Preparation-------------------------------------------- 64
12.2.2. Caution------------------------------------------------- 64
12.2.3. How to Remove the Shield Case---------------- 64
12.2.4. How to Install the Shield Case ------------------- 65
12.2.2. Caution------------------------------------------------- 64
12.2.3. How to Remove the Shield Case---------------- 64
12.2.4. How to Install the Shield Case ------------------- 65
12.3. Terminal Guide of the ICs, Transistors, Diodes
and Electrolytic Capacitors ---------------------------- 66
12.3.1. Base Unit ---------------------------------------------- 66
12.3.2. Handset ------------------------------------------------ 66
12.3.2. Handset ------------------------------------------------ 66
13 Schematic Diagram -------------------------------------------- 67
13.1. For Schematic Diagram -------------------------------- 67
13.1.1. Base Unit (Base Unit (Main)) --------------------- 67
13.1.2. Handset (Handset) ---------------------------------- 67
13.1.2. Handset (Handset) ---------------------------------- 67
13.2. Base Unit (Main) ----------------------------------------- 68
13.2.1. KX-TG6811RU --------------------------------------- 68
13.2.2. KX-TG6821RU --------------------------------------- 70
13.2.2. KX-TG6821RU --------------------------------------- 70
13.3. Base Unit (Operation) (KX-TG6821 only)---------- 72
13.4. Base Unit (TAM Counter) (KX-TG6821 only) ----- 72
13.4. Base Unit (TAM Counter) (KX-TG6821 only) ----- 72
4
KX-TG6811RUB/KX-TG6811RUM/KX-TG6812RUB/KX-TG6821RUB/KX-TG6821RUM/KX-TG6822RUM/KX-TG6881RUB/KX-TG6891RUB/KX-TGA681RUB/KX-TGA681RUM/KX-TGA20EXB
13.5. Handset----------------------------------------------------- 74
14 Printed Circuit Board ------------------------------------------ 77
14.1. Base Unit (Main)------------------------------------------ 77
14.1.1. Component View ------------------------------------ 77
14.1.2. Bottom View ------------------------------------------ 78
14.1.2. Bottom View ------------------------------------------ 78
14.2. Base Unit (Operation) (KX-TG6821 only) ---------- 79
14.2.1. Component View ----------------------------------- 79
14.3. Base Unit (LED) (KX-TG6821 only) ----------------- 81
14.3.1. Component View ------------------------------------ 81
14.3.2. Bottom View ------------------------------------------ 81
14.3.2. Bottom View ------------------------------------------ 81
14.4. Handset----------------------------------------------------- 83
14.4.1. Component View ------------------------------------ 83
14.4.2. Bottom View ------------------------------------------ 84
14.4.2. Bottom View ------------------------------------------ 84
15 Exploded View and Replacement Parts List ----------- 85
15.1. Cabinet and Electrical Parts (Base Unit) ----------- 85
15.1.1. KX-TG6811-------------------------------------------- 85
15.1.2. KX-TG6821 ------------------------------------------- 86
15.1.2. KX-TG6821 ------------------------------------------- 86
15.2. Cabinet and Electrical Parts (Handset) ------------- 87
15.3. Cabinet and Electrical Parts (Charger Unit) ------- 88
15.4. Accessories------------------------------------------------ 89
15.5. Replacement Part List ---------------------------------- 90
15.3. Cabinet and Electrical Parts (Charger Unit) ------- 88
15.4. Accessories------------------------------------------------ 89
15.5. Replacement Part List ---------------------------------- 90
15.5.1. Base Unit ---------------------------------------------- 90
15.5.2. Handset ------------------------------------------------ 93
15.5.3. Charger Unit ------------------------------------------ 94
15.5.4. Accessories ------------------------------------------- 95
15.5.5. Screws ------------------------------------------------- 95
15.5.6. Fixtures and Tools----------------------------------- 95
15.5.2. Handset ------------------------------------------------ 93
15.5.3. Charger Unit ------------------------------------------ 94
15.5.4. Accessories ------------------------------------------- 95
15.5.5. Screws ------------------------------------------------- 95
15.5.6. Fixtures and Tools----------------------------------- 95
