Master Electronics Repair !

Welcome to Master Electronics Repair! website.Here you will find:Service Modes, Circuit Diagrams,Service manuals, Firmware Update procedure, Disassemble procedure, Universal remote control setup codes, Troubleshooting, Diagnosing, Measuring, and more.... of many of LCD/LED TV/Displays,others various electronic apparates,trough many technical notes and tips/tricks to help repairing/fixing Troubles/ faults,for electrical technicians.This site helps you to save the Earth from electronic waste!

Richtige Fernseher haben Röhren!

Richtige Fernseher haben Röhren!

In Brief: On this site you will find pictures and technical information about Service Modes, Circuit Diagrams, Firmware Update procedure, Disassemble procedure, Universal remote control set-up codes, Troubleshooting and more....

If you go into the profession, you will obtain or have access to a variety of tech tips databases HERE IT IS Master Electronics Repair !.

These are an excellent investment where the saying: 'time-is-money' rules. However, to learn, you need to develop a general troubleshooting approach - a logical, methodical, method of narrowing down the problem. A tech tip database might suggest: 'Replace C536' for a particular symptom. This is good advice for a specific problem on one model. However, what you really want to understand is why C536 was the cause and how to pinpoint the culprit in general even if you don't have a service manual or schematic and your tech tip database doesn't have an entry for your sick TV or VCR.

While schematics are nice, you won't always have them or be able to justify the purchase for a one-of repair. Therefore, in many cases, some reverse engineering will be necessary. The time will be well spent since even if you don't see another instance of the same model in your entire lifetime, you will have learned something in the process that can be applied to other equipment problems.
As always, when you get stuck, checking out a tech-tips database may quickly identify your problem and solution.In that case, you can greatly simplify your troubleshooting or at least confirm a diagnosis before ordering parts.

Happy repairing!

Today, the West is headed for the abyss. For the ultimate fate of our disposable society is for that society itself to be disposed of. And this will happen sooner, rather than later.

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Note that if you don't find what you searched for, try it after a period of time; the site is a never ending job !

..............The bitterness of poor quality is remembered long after the sweetness of todays funny gadgets low price has faded from memory........ . . . . . .....
Don't forget the past, the end of the world is upon us! Pretty soon it will all turn to dust!

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All posts are presented here for informative, historical and educative purposes as applicable within fair use. NOTHING HERE IS FOR SALE !

Monday, 4 March 2019

SONY KLV-28R412B - HOW TO ENTER SERVICE MODE - HOW TO ACTIVATE SELF DIAGNOSTICS - UPDATING SOFTWARE - LED TV REPAIR AND SERVICE

SONY KLV-28R412B - How to enter service mode - How to activate self diagnostics - Updating software - LED TV repair and service

Category: LED Television Repair and Service

Contents ts of this article

How to access service mode
Accessing Diagnostic Menu
Model number edit
Software update

SONY KLV-28R412B

Accessing Service Mode
1) Go to TV standby condition by remote commander.
2) Press “i+ (info)”, “5”, “Volume +” then “TV power” on remote.
3) You can see Service Mode on display.

Accessing Software Version
1) Press (Enter) or RIGHT button on Remote to enter status information.

2) Press (Enter) button on Remote to back to Service Mode.

Accessing Self Diagnostic History
1) Press (Enter) button on Remote to enter Self Check Mode.

2) Press Enter button on Remote to back to Service Mode

Accessing Self Diagnostic Menu
1) Go to TV standby condition by remote commander.
2) Press “i+ (info)”, “5”, “Volume -” then “TV power” on remote.
3) T Exit press power Off & on.

Remote function:
Error history clear : <8> -> <0>
Panel operation time clear: <7> -> <0>

Accessing Serial Number Edit
1) Press RIGHT button on Remote to edit Serial Number.

2) Press UP or DOWN button to select number
The font color of YES is change to black when it is selected.

3) Serial Number can be set ONLY ONCE.
After user input data , press <Enter>.
Pop dialog will appear to inform user to confirm data.
Press LEFT or RIGHT button to select YES or NO.
Select YES if input data is correct
Select NO if input data is incorrect.
Press <Enter> to save answer.

4) If yes selected then the input data will save to the EEPROM

SERIAL NUMBER EDIT is grayed out and the serial number that has been input is displayed.

User will not able to edit anymore

5) If NO is selected, the input data is not saved into EEPROM

The serial number that has been input is displayed.
User can still edit the Serial Number.

Note : * The font color of NO is change to black when it is selected

Note : * The font color of SERIAL NUMBER is white after NO is selected

Accessing Model Name Edit
1) Press RIGHT button on Remote to edit Model Name.

2) Press UP or DOWN button on Remote to select character

3) Model Name can be set ONLY ONCE.

After user input data , press <Enter>.
Pop dialog will appear to inform user to confirm data.
Press LEFT or RIGHT button to select YES or NO.
Select YES if input data is correct.
Select NO if input data is incorrect.
Press <Enter> to save answer.

4) If YES is selected, the input data is saved into EEPROM.

Model Name EDIT is grayed out and the model name that has been input is displayed

User will not able to edit anymore

Updating the software (For Asia Region Only)
Note:
Software updates can be performed by:
1)System Update through the Internet which available only on Certain LCD models. Please check on i-manual or Operating Instruction whether the model is available with the system.
OR
2) Please check with Software Upgrade Manual in Service Website for the procedure and when it is require for the software updating.
3) The software updates may not be ready yet in the Website after the 1st Issue of Service Manual is released.
4) Do check and keep updated with the Service Website for any information and/or listed issues that are software related to avoid any discrepancy.

No Power

Check DC voltage at JL6001 Is it 19.5V?

Take out adaptor and test at adaptor output is it 19V – 19.5V? > BB board

If adapter is faulty Change adaptor and test again.