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-40S550A - HOW TO ACCESS SERVICE MODE - LED BLINKING AND CAUSES - SERVICE MODE ADJUSTMENTS - SELF DIAGNOSTICS - LED TELEVISION REPAIR AND SERVICE

Sony KLV-40S550A - How to access service mode - LED Blinking and causes - Service mode adjustments - Self diagnostics - LED Television repair and service

Category: LCD Television Repair and Service

Contents of this article

How to enter to service mode
LED Blinking and Causes
Self diagnostics

Sony KLV-40S550A

SELF DIAGNOSIS FUNCTION

If an error occurs, the STANDBY LED will automatically begin to flash. The number of times the LED flashes translates to a probable source of the problem. A definition of the STANDBY LED flash indicators is listed in the instruction manual for the user’s knowledge and reference. If an error symptom cannot be reproduced, the remote commander can be used to review the failure occurrence data stored in memory to reveal past problems and how often these problems occur.
DIAGNOSTIC TEST INDICATORS
When an error occurs, the STANDBY LED will flash a set number of times to indicate the possible cause of the problem.
If there is more than one error, the LED will identify the first of the problem areas. Result for all of the following diagnostic items are displayed on screen. If the screen displays a “0”, no error has occurred .

LED BLINKING CODE

Number of times STANDY LED (Red) flashes	Monitoring Items (Screen Display)	Diagnostic Item Description
2 times	DC_DET	Power supply voltage error
3 times	DC_ALERT 1	Confirm the voltage at F7016 is about 3.3V and F7016 is not open. Confirm the voltage at F7015 is about 5V and F7015 is not open.
4 times	DC_ALERT 2	Confirm the voltage at F7017 is about 1.8V and F7017 is not open. Confirm the voltage at C7110 is about 5.5V and F7012 is not open. (Only applicable for AM series)
5 times	DC_ALERT 3	Confirm if F7003 is open. Confirm voltage at either pin 5, 6, 7 or 8 of IC7009 is the following: 12V
6 times	BACKLIGHT/INVERTER ERROR	Confirm if input to Q9008 is about 3.3V.
7 times	INTERNAL TEMP ERROR	If internal temperature of the LCD set increases over 70C it will shut down and the set goes to standby.
8 times	AUDIO ERROR	Confirm the correct value at AU_13V, AU_12V (=10V). Confirm the speaker is OK, speaker terminal is not shorted to GND. Change IC2007 to a new one.
9 times	FAN ERROR	Fan error.
10 times	DEF ERROR	Digital EF circuit error.
11 times	NVM ERROR	NVM is broken. No power supply to NVM.
12 times	IIC ERROR	No communication between IC9000 and IC3000.
13 times	BALANCER ERROR	Confirm if input to Q9009 is about 3.3V.
14 times	HDMI ERROR	-

STOPPING THE STANDBY FLASH

Turn off the power switch on the TV main unit or unplug the power cord from the outlet to stop the STANDBY LED from flashing.
SELF-DIAGNOSTIC SCREEN DISPLAY
For errors with symptoms such as “power sometimes shuts off” or “screen sometimes goes out” that cannot be confirmed, it is possible to bring up past occurrences of failure for confirmation on the screen:

To Bring Up Screen Test
In standby mode, press buttons on the remote commander sequentially in rapid succession as shown below:

DISPLAY > Channel 5 > Volume - > POWER On.

Quitting Self-diagnostic screen
To quit the entire self-diagnostic screen, turn off the power switch on the remote commander or the main unit.

ACCESSING THE DIGITAL SERVICE
ADJUSTMENT MENUS
1. Turn the TV on and view a Digital channel.
2. Put the TV in standby mode. (Power off).
3. Press the following buttons on the Remote Commander within a second:
DISPLAY > Channel 5 > Volume + > POWER On.
The Digital service menu displays.