Panasonic KX-TG4222CB User manual

© Panasonic System Networks Co., Ltd. 2013
Unauthorized copying and distribution is a violation
of law.
ORDER NO. KM41303666CE
F1
Telephone Equipment
Model No. KX-TG4222CB
KX-TG313CSK
KX-TGA421CB
KX-TGA421CN
Digital Cordless Answering System
B: Black Version
N: Champagne Gold Version
(for Canada)
(Handset)
KX-TGA421 KX-TG4221
(Base Unit)
Caller ID Compatible
(Charger Unit)
Model No
Base Unit Handset Charger Unit Expandable
KX-TG4222
1 (TG4221) 2 (TGA421) 1 Up to 6
KX-TG313SK
1 (TG4221) 3 (TGA421) 2 Up to 6
Configuration for each model

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KX-TG4222CB/KX-TG313CSK/KX-TGA421CB/KX-TGA421CN
WARNING
Thisservice information isdesigned for experienced repair techniciansonly and isnot designed for use by the general
public. It doesnot contain warningsor cautionsto advise non-technical individualsof potential dangersin attempting
to service aproduct. Productspowered by electricity should be serviced or repaired only by experienced professional
technicians. Any attempt to service or repair the product or productsdealt with in thisservice information by anyone
else could result in seriousinjury 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.
LWhen you note the serial number, write down all 11 digits. The serial number may be found on the bottom of the unit.
LThe illustrations in this Service Manual may vary slightly from the actual product.

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KX-TG4222CB/KX-TG313CSK/KX-TGA421CB/KX-TGA421CN
TABLE OF CONTENTS
PAGE PAGE
1 Safety Precautions----------------------------------------------- 4
1.1. For Service Technicians --------------------------------- 4
2 Warning -------------------------------------------------------------- 4
2.1. Battery Caution--------------------------------------------- 4
2.2. About Lead Free Solder (PbF: Pb free)-------------- 5
2.2.1. Suggested PbF Solder ------------------------------ 5
2.3. Discarding of P. C. Board-------------------------------- 5
3 Specifications ----------------------------------------------------- 6
4 Location of Controls and Components ------------------- 7
5 Installation Instructions ---------------------------------------- 7
6 Operating Instructions------------------------------------------ 7
7 Schematic Diagram ---------------------------------------------- 9
7.1. For Schematic Diagram---------------------------------- 9
7.1.1. Base Unit (Schematic Diagram (Base
Unit_Main)) --------------------------------------------- 9
7.1.2. Handset (Schematic Diagram
(Handset_Main)) -------------------------------------- 9
7.2. Schematic Diagram (Base Unit_Main) --------------10
7.3. Schematic Diagram (Base Unit_Operation) -------12
7.4. Schematic Diagram (Handset_Main) ----------------14
8 Exploded View and Replacement Parts List -----------16
8.1. Replacement Parts List ---------------------------------16

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KX-TG4222CB/KX-TG313CSK/KX-TGA421CB/KX-TGA421CN
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.
2Warning
2.1. Battery Caution
Risk of explosion if battery is replaced by an incorrect type. Dispose of used batteries according to the instructions.
Attention:
A nickel metal hydride battery that is recyclable powers the product you have purchased.
Please call 1-800-8-BATTERY (1-800-822-8837) for information on how to recycle this battery.

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KX-TG4222CB/KX-TG313CSK/KX-TGA421CB/KX-TGA421CN
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).
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.
Component
Component
pin
Solder
Remove all of the
excess solder
(Slice View)
p
0.3mm X 100 g 0.6 mm X 100 g 1.0 mm X 100 g