KX-TG8551CAB, KX-TG8561CAB, KX-TGA855RUB — Panasonic Telephone Service Manual (repair manual)

Model
KX-TG8551CAB KX-TG8561CAB KX-TGA855RUB
Pages
103
Size
8.49 MB
Type
PDF
Document
Service Manual
Brand
Device
Telephone / DIGITAL CORDLESS PHONE
File
kx-tg8551cab-kx-tg8561cab-kx-tga855rub.pdf
Date

View Panasonic KX-TG8551CAB / KX-TG8561CAB / KX-TGA855RUB Service Manual online

ORDER NO. KM41206589CE
Telephone Equipment
Model No.
KX-TG8551CAB 
KX-TG8561CAB 
KX-TGA855RUB
Digital Cordless Phone
Digital Cordless Answering System
B: Black Version
(for Kazakhstan)
(for Tajikistan)
(for Uzbekistan)
(for Turkmenistan)
(for Kyrgyzstan)
Model No
Base Unit
Handset
Charger Unit Expanda ble
KX-TG8551
KX-TG8561
KX-TGA855*
1 (TG8551)
1 (TG8561)
1 (TGA855)
1 (TGA855)
1 (TGA855)
1
Up to 6
Up to 6
Configuration  for ea c h model
*KX-TGA855 is also an optional accessory, which contains a 
handset and a charger.
(Charger Unit)
KX-TGA855
(Handset)
KX-TG8551
(Base Unit)
KX-TG8561
(Base Unit)
2
KX-TG8551CAB/KXTG8561CAB/KX-TGA855RUB
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.
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.
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.
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.
3
KX-TG8551CAB/KXTG8561CAB/KX-TGA855RUB
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-TG8561
only) ----------------------------------------------------- 11
4.4.3. EEPROM (IC611) ------------------------------------ 11
4.4.4. Power Supply Circuit--------------------------------12
4.4.5. Telephone Line Interface---------------------------13
4.4.6. Transmitter/Receiver--------------------------------13
4.5. Block Diagram (Handset)-------------------------------14
4.6. Circuit Operation (Handset)----------------------------15
4.6.1. Outline --------------------------------------------------15
4.6.2. Power Supply Circuit/Reset Circuit--------------15
4.6.3. Charge Circuit ----------------------------------------15
4.6.4. Battery Low/Power Down Detector--------------15
4.6.5. Speakerphone ----------------------------------------15
4.7. Circuit Operation (Charger Unit) ----------------------16
4.7.1. Power Supply Circuit--------------------------------16
4.8. Behavior of Electric Power Failure -------------------16
4.9. Signal Route -----------------------------------------------17
5 Location of Controls and Components ------------------19
6 Installation Instructions ---------------------------------------19
7 Operating Instructions-----------------------------------------19
7.1. For Service Hint-------------------------------------------19
8 Service Mode -----------------------------------------------------20
8.1. Engineering Mode ----------------------------------------20
8.1.1. Base Unit ----------------------------------------------20
8.1.2. Handset ------------------------------------------------22
8.2. EEPROM LAYOUT (Handset)-------------------------24
8.2.1. Scope ---------------------------------------------------24
8.2.2. Introduction--------------------------------------------24
8.2.3. EEPROM contents ----------------------------------24
8.3. Copying Phonebook Items when Repairing -------25
8.4. How to Clear User Setting------------------------------27
8.4.1. Resetting both base unit and handset----------27
8.4.2. Resetting only handset -----------------------------27
9 Troubleshooting Guide ----------------------------------------28
9.1. Troubleshooting Flowchart -----------------------------28
9.1.1. Check Power------------------------------------------29
9.1.2. Check Battery Charge ------------------------------30
9.1.3. Check Link---------------------------------------------32
9.1.4. Check the RF part -----------------------------------35
9.1.5. Check Handset Transmission --------------------38
9.1.6. Check Handset Reception-------------------------38
9.1.7. Check Caller ID --------------------------------------38
9.1.8. Check Headset Transmission --------------------38
9.1.9. Check Headset Reception ------------------------ 38
9.1.10. Bell Reception---------------------------------------- 39
9.1.11. Check TAM Operation (for KX-TG8561
only) ---------------------------------------------------- 39
9.1.12. Operation with supply from handset under
electric power failure ------------------------------- 40
9.2. Troubleshooting by Symptom (Base Unit and
Charger Unit)---------------------------------------------- 41
9.2.1. Check Point (Base Unit) --------------------------- 41
9.2.2. Check Point (Charger Unit) ----------------------- 43
9.3. Troubleshooting by Symptom (Handset)----------- 44
9.3.1. Check Point (Handset)----------------------------- 44
9.3.2. Troubleshooting for Speakerphone ------------- 47
10 Disassembly and Assembly Instructions--------------- 48
10.1. Disassembly Instructions------------------------------- 48
10.1.1. Base Unit ---------------------------------------------- 48
10.1.2. Handset------------------------------------------------ 51
10.1.3. Charger Unit ------------------------------------------ 52
10.2. How to Replace the Base Unit LCD (KX-
TG8561 Only) --------------------------------------------- 53
10.3. How to Replace the Handset LCD------------------- 55
11 Measurements and Adjustments -------------------------- 56
11.1. Equipment Required ------------------------------------ 56
11.2. The Setting Method of JIG (Base Unit) ------------- 56
11.2.1. Connections ------------------------------------------ 56
11.2.2. How to install Batch file into P.C. ---------------- 57
11.2.3. Commands-------------------------------------------- 57
11.3. Adjustment Standard (Base Unit) -------------------- 58
11.3.1. Bottom View ------------------------------------------ 58
11.4. Adjustment Standard (Charger Unit) ---------------- 60
11.4.1. Bottom View ------------------------------------------ 60
11.5. The Setting Method of JIG (Handset)--------------- 61
11.5.1. Connections ------------------------------------------ 61
11.5.2. How to install Batch file into P.C. ---------------- 62
11.5.3. Commands-------------------------------------------- 62
11.6. Adjustment Standard (Handset) ---------------------- 63
11.6.1. Component View ------------------------------------ 63
11.7. Things to Do after Replacing IC or X'tal ------------ 64
11.7.1. How to download the data ------------------------ 64
11.8. RF Specification ------------------------------------------ 66
11.8.1. Base Unit ---------------------------------------------- 66
11.8.2. Handset------------------------------------------------ 66
11.9. How to Check the Handset Speaker or
Receiver ---------------------------------------------------- 67
11.10. Frequency Table (MHz)--------------------------------- 67
12 Miscellaneous---------------------------------------------------- 68
12.1. How to Replace the Flat Package IC --------------- 68
12.1.1. Preparation-------------------------------------------- 68
12.1.2. How to Remove the IC----------------------------- 68
12.1.3. How to Install the IC -------------------------------- 69
12.1.4. How to Remove a Solder Bridge ---------------- 69
12.2. How to Replace the Shield Case--------------------- 70
12.2.1. Preparation-------------------------------------------- 70
12.2.2. Caution------------------------------------------------- 70
12.2.3. How to Remove the Shield Case---------------- 70
12.2.4. How to Install the Shield Case ------------------- 71
12.3. Terminal Guide of the ICs, Transistors, Diodes
and Electrolytic Capacitors ---------------------------- 72
4
KX-TG8551CAB/KXTG8561CAB/KX-TGA855RUB
12.3.1. Base Unit ---------------------------------------------- 72
12.3.2. Handset ------------------------------------------------ 72
12.3.3. Charger Unit ------------------------------------------ 72
13 Schematic Diagram--------------------------------------------- 73
13.1. For Schematic Diagram -------------------------------- 73
13.1.1. Base Unit (Base Unit (Main)) --------------------- 73
13.1.2. Handset (Handset) ---------------------------------- 73
13.1.3. Charger Unit (Charger Unit) ---------------------- 73
13.2. Base Unit (Main)------------------------------------------ 74
13.2.1. KX-TG8551CA --------------------------------------- 74
13.2.2. KX-TG8561CA --------------------------------------- 76
13.3. Base Unit (Operation) (KX-TG8561 only)---------- 78
13.4. Handset----------------------------------------------------- 80
13.5. Charger Unit----------------------------------------------- 82
14 Printed Circuit Board ------------------------------------------ 83
14.1. Base Unit (Main)------------------------------------------ 83
14.1.1. KX-TG8551 ------------------------------------------- 83
14.1.2. KX-TG8561 ------------------------------------------- 85
14.2. Base Unit (Operation) (KX-TG8561 only)---------- 87
14.2.1. Component View  ----------------------------------- 87
14.3. Handset----------------------------------------------------- 89
14.3.1. Component View ------------------------------------ 89
14.3.2. Bottom View ------------------------------------------ 90
14.4. Charger Unit----------------------------------------------- 91
14.4.1. Component View ------------------------------------ 91
14.4.2. Bottom View ------------------------------------------ 91
15 Exploded View and Replacement Parts List ----------- 92
15.1. Cabinet and Electrical Parts (Base Unit) ----------- 92
15.1.1. KX-TG8551 ------------------------------------------- 92
15.1.2. KX-TG8561 ------------------------------------------- 93
15.2. Cabinet and Electrical Parts (Handset)------------- 94
15.3. Cabinet and Electrical Parts (Charger Unit) ------- 95
15.4. Accessories------------------------------------------------ 96
15.5. Replacement Part List ---------------------------------- 97
15.5.1. Base Unit ---------------------------------------------- 97
15.5.2. Handset ---------------------------------------------- 101
15.5.3. Charger Unit ---------------------------------------- 102
15.5.4. Accessories ----------------------------------------- 102
15.5.5. Screws ----------------------------------------------- 103
15.5.6. Fixtures and Tools--------------------------------- 103
Page of 103
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Here you can view online or download Panasonic KX-TG8551CAB / KX-TG8561CAB / KX-TGA855RUB Service Manual in pdf. This Service Manual can help you recover, restore, fix, disassemble and repair Panasonic KX-TG8551CAB / KX-TG8561CAB / KX-TGA855RUB Telephone. Information contained in Panasonic KX-TG8551CAB / KX-TG8561CAB / KX-TGA855RUB service manual (repair manual) typically includes:

  • Disassembly, troubleshooting, programming, maintenance, remote, adjustment, installation and setup instructions.
  • Schematics, wiring and block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Parts list (bill of materials).