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Model
KX-TG6811CAB KX-TG6811CAM KX-TG6812CAB KX-TG6821CAB KX-TG6821CAM KX-TG6822CAB KX-TGA681RUB KX-TGA681RUM
Pages
95
Size
7.58 MB
Type
PDF
Document
Service Manual
Brand
Device
Telephone / DIGITAL CORDLESS ANSWERING SYSTEM
File
kx-tg6811cab-kx-tg6811cam-kx-tg6812cab-kx-tg6821ca.pdf
Date

Panasonic KX-TG6811CAB / KX-TG6811CAM / KX-TG6812CAB / KX-TG6821CAB / KX-TG6821CAM / KX-TG6822CAB / KX-TGA681RUB / KX-TGA681RUM Service Manual ▷ View online

3
KX-TG6811CAB/KX-TG6811CAM/KX-TG6812CAB/KX-TG6821CAB/KX-TG6821CAM/KX-TG6822CAB/KX-TGA681RUB/KX-TGA681RUM
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
2.2.1. Suggested PbF Solder ------------------------------ 6
2.3. Discarding of P.C. Board--------------------------------- 6
3 Specifications ----------------------------------------------------- 7
4 Technical Descriptions ----------------------------------------- 8
4.1. Block Diagram (Base Unit) ------------------------------ 8
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
4.4.1. BBIC (Base Band IC: IC501) --------------------- 11
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
4.5. Block Diagram (Handset)-------------------------------15
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
4.7. Behavior of Electric Power Failure -------------------17
4.7.1. Supply from handset --------------------------------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
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
8.2. EEPROM LAYOUT (Handset)-------------------------25
8.2.1. Scope ---------------------------------------------------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
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
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
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
10.2. 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
11.2.1. Connections ------------------------------------------ 52
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
11.5. 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
11.8. 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
12.2. 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
12.3. Terminal Guide of the ICs, Transistors, Diodes
and Electrolytic Capacitors ---------------------------- 66
12.3.1. Base Unit ---------------------------------------------- 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
13.2. Base Unit (Main) ----------------------------------------- 68
13.2.1. KX-TG6811CA --------------------------------------- 68
13.2.2. KX-TG6821CA --------------------------------------- 70
13.3. Base Unit (Operation) (KX-TG6821 only)---------- 72
13.4. Base Unit (TAM Counter) (KX-TG6821 only) ----- 72
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KX-TG6811CAB/KX-TG6811CAM/KX-TG6812CAB/KX-TG6821CAB/KX-TG6821CAM/KX-TG6822CAB/KX-TGA681RUB/KX-TGA681RUM
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
14.2. 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
14.4. Handset----------------------------------------------------- 83
14.4.1. Component View ------------------------------------ 83
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
15.2. 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
15.5.1. Base Unit ---------------------------------------------- 90
15.5.2. Handset ------------------------------------------------ 93
15.5.3. Charger Unit ------------------------------------------ 95
15.5.4. Accessories ------------------------------------------- 95
15.5.5. Screws ------------------------------------------------- 95
15.5.6. Fixtures and Tools----------------------------------- 95
5
KX-TG6811CAB/KX-TG6811CAM/KX-TG6812CAB/KX-TG6821CAB/KX-TG6821CAM/KX-TG6822CAB/KX-TGA681RUB/KX-TGA681RUM
1 Safety Precautions
1.1.
For Service Technicians
• Repair service shall be provided in accordance with repair technology information such as service manual so as to
prevent fires, injury or electric shock, which can be caused by improper repair work.
1. When repair services are provided, neither the products nor their parts or members shall be remodeled. 
2. If a lead wire assembly is supplied as a repair part, the lead wire assembly shall be replaced.
3. FASTON terminals shall be plugged straight in and unplugged straight out.
• ICs and LSIs are vulnerable to static electricity.
When repairing, the following precautions will help prevent recurring malfunctions.
1. Cover plastic parts boxes with aluminum foil.
2. Ground the soldering irons.
3. Use a conductive mat on worktable.
4. Do not grasp IC or LSI pins with bare fingers.
2 Warning
2.1.
Battery Caution
1. Danger of explosion if battery is incorrectly replaced.
2. Replace only with the same or equivalent type recommended by the manufacturer.
3. Dispose of used batteries according to the manufacture’s Instructions.
2.2.
About Lead Free Solder (Pbf: Pb free)
Note:
In the information below, Pb, the symbol for lead in the periodic table of elements, will refer to standard solder or solder that
contains lead.
We will use PbF solder when discussing the lead free solder used in our manufacturing process which is made from Tin (Sn),
Silver (Ag), and Copper (Cu).
This model, and others like it, manufactured using lead free solder will have PbF stamped on the PCB. For service and repair
work we suggest using the same type of solder.
Caution
• PbF solder has a melting point that is 50 
F ~ 70 F (30 C ~ 40 C) higher than Pb solder. Please use a soldering iron with 
temperature control and adjust it to 700 
F ± 20 F (370 C ± 10 C). 
• Exercise care while using higher temperature soldering irons.: 
Do not heat the PCB for too long time in order to prevent solder splash or damage to the PCB.
• PbF solder will tend to splash if it is heated much higher than its melting point, approximately 1100 
F (600 C).
• When applying PbF solder to double layered boards, please check the component side for excess which may flow onto the
opposite side (See the figure below).
Component
Component 
pin
solder
Remove all of the
excess solder
(Slice View)
6
KX-TG6811CAB/KX-TG6811CAM/KX-TG6812CAB/KX-TG6821CAB/KX-TG6821CAM/KX-TG6822CAB/KX-TGA681RUB/KX-TGA681RUM
2.2.1.
Suggested PbF Solder
There are several types of PbF solder available commercially. While this product is manufactured using Tin, Silver, and Copper
(Sn+Ag+Cu), you can also use Tin and Copper (Sn+Cu) or Tin, Zinc, and Bismuth (Sn+Zn+Bi). Please check the manufacturer’s
specific instructions for the melting points of their products and any precautions for using their product with other materials. 
The following lead free (PbF) solder wire sizes are recommended for service of this product: 0.3 mm, 0.6 mm and 1.0 mm.
2.3.
Discarding of P.C. Board
When discarding P. C. Board, delete all personal information such as telephone directory and caller list or scrap P. C. Board.
0.3 mm X 100 g
0.6 mm X 100 g
1.0 mm X 100 g
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Panasonic KX-TG6811CAB / KX-TG6811CAM / KX-TG6812CAB / KX-TG6821CAB / KX-TG6821CAM / KX-TG6822CAB / KX-TGA681RUB / KX-TGA681RUM Service Manual ▷ Download

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  • Here you can View online or download the Service Manual for the Panasonic KX-TG6811CAB / KX-TG6811CAM / KX-TG6812CAB / KX-TG6821CAB / KX-TG6821CAM / KX-TG6822CAB / KX-TGA681RUB / KX-TGA681RUM in PDF for free, which will help you to disassemble, recover, fix and repair Panasonic KX-TG6811CAB / KX-TG6811CAM / KX-TG6812CAB / KX-TG6821CAB / KX-TG6821CAM / KX-TG6822CAB / KX-TGA681RUB / KX-TGA681RUM Telephone. Information contained in Panasonic KX-TG6811CAB / KX-TG6811CAM / KX-TG6812CAB / KX-TG6821CAB / KX-TG6821CAM / KX-TG6822CAB / KX-TGA681RUB / KX-TGA681RUM Service Manual (repair manual) includes:
  • Disassembly, troubleshooting, maintenance, adjustment, installation and setup instructions.
  • Schematics, Circuit, Wiring and Block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Exploded View and Parts List.