KDL-26EX550 - Sony TV Service Manual (repair manual). Page 10

The units in this manual contain a self-diagnostic function. If an error occurs, the STANDBY

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 th

If an error symptom cannot be reproduced, the remote commander can be used to review the

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.

2
3

If the screen displays a “0”, no error has occurred .

4
5

3

0.5

0 5

6

8

9

7

0.5

3

For errors with symptoms such as “power sometimes shuts off” or “screen sometimes goes o

fi

i

h

9

1
1
1

confirmation on the screen:

In standby mode, press buttons on the remote commander sequentially in rapid succession a

5

*

DISPLAY

Channel

Volume

KDL-26EX550

5

*

 : Note that this differs fro

DISPLAY

Channel

Volume

Y LED will automatically begin to flash.

he user’s knowledge and reference.

e failure occurrence data stored in memory to reveal past problems and how often these 

2

MAIN_POWE

Main Power Over Voltage Protection

DC ALERT

DC ALERT

3

DC_ALERT

DC_ALERT

AUD_PROT

Audio Abnormal Detection

HDMI_EQ

HDMI equalizer/switch I2C NACK

TU_DEMOD

Tuner or dem odulator I2C NACK

4

-

Not used

5

P_ID_ERR

Panel ID NVM Error

3

6

BACKLITE

Backlight failure

TEMP_ERR

Therm al Error

FAN_ERR

Not used

8

-

Software Error (Also the main board’s mem ory or Wi-Fi
module is a suspect)

9

-

Not used

7

out” that cannot be confirmed, it is possible to bring up past occurrences of failure for 

9

Not used

0

-

Not used

1

-

Not used

2

-

Not used

as shown below:

TV POWER

10

 from entering the service mode (volume +)

TV POWER