DOWNLOAD Panasonic KX-TGA914EXS Service Manual ↓ Size: 2.57 MB | Pages: 63 in PDF or view online for FREE

ORDER NO. KM40611226CE

Cordless Camera

Silver Version
(for Europe, Russia, Ukraine)

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1 Safety Precautions----------------------------------------------- 4

1.1. For Service Technicians --------------------------------- 4

2 Warning -------------------------------------------------------------- 4

2.1. About Lead Free Solder (Pbf: Pb free)--------------- 4

3 Specifications ----------------------------------------------------- 6
4 Technical Descriptions ----------------------------------------- 7

4.1. Block Diagram (Camera Unit) -------------------------- 7
4.2. Circuit Operation (Camera Unit) ----------------------- 8
4.3. Signal Route -----------------------------------------------12

5 Location of Controls and Components ------------------14

5.1. Controls -----------------------------------------------------14

6 Installation Instructions ---------------------------------------15

6.1. Setting up the cordless camera -----------------------15

7 Operation Instructions-----------------------------------------17

7.1. Registering the Cordless Camera --------------------17
7.2. Cancelling the Cordless Camera ---------------------17

8 SERVICE  MODE--------------------------------------------------17

8.1. How to Clear User Setting------------------------------17

9 Troubleshooting Guide ----------------------------------------18

9.1. Troubleshooting Flowchart -----------------------------18
9.2. Troubleshooting by Symptom (Camera)------------23
9.3. How to Replace the Flat Package IC----------------26

10 Disassembly and Assembly Instructions ---------------28

10.1. Disassembly Instructions -------------------------------28
10.2. Assembly Instructions -----------------------------------31

11 Measurements and Adjustments---------------------------34

11.1. The Setting Method of JIG -----------------------------34
11.2. Adjustment Standard ------------------------------------36
11.3. Things to Do after Replacing IC ----------------------37
11.4. RF Specification-------------------------------------------38
11.5. How to Check Speaker----------------------------------39
11.6. Frequency Table (MHz) ---------------------------------39

12 Schematic Diagram ---------------------------------------------40

12.1. For Schematic Diagram---------------------------------40
12.2. Schematic Diagram (Main)-----------------------------42
12.3. Schematic Diagram (RF Part) -------------------------44
12.4. Schematic Diagram (Camera Part) ------------------45
12.5. Schematic Diagram (Cord Switch) -------------------46

13 Printed Circuit Board-------------------------------------------47

13.1. Circuit Board (Main)--------------------------------------47
13.2. Circuit Board (RF Part)----------------------------------49
13.3. Circuit Board (Camera Part) ---------------------------51
13.4.  Circuit Board (Cord Switch) ---------------------------52

14 Appendix Information of Schematic Diagram ---------53

14.1. CPU Data---------------------------------------------------53
14.2. Terminal Guide of the ICs, Transistors and

Diodes -------------------------------------------------------56

15 Exploded View and Replacement Parts List -----------57

15.1. Cabinet and Electrical Parts (Cordless

Camera)-----------------------------------------------------57

15.2. Cabinet and Electrical Parts (Call Button)----------58
15.3. Cabinet and Electrical Parts (Wall Mounting

Adaptor)-----------------------------------------------------59

15.4. Accessories and Packing Materials------------------60
15.5. Replacement Parts List ---------------------------------61

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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.

In the information below, Pb, the symbol for lead in the periodic table of elements, will refer to standard solder or solder that con-
tains 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.

• 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 temper-

ature 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).