SONY KDL-55HX850 - KDL-55HX853 - KDL-55HX855 SERVICE MODE LED BLINKING CODE AND VCOM ADJUSTMENT - LED TV REPAIR

SONY KDL-55HX850 - KDL-55HX853 - KDL-55HX855 Service mode Led blinking code and VCOM adjustment - LED tv repair

Category:LED LCD Television Repair 

Contents of this article

• How to enter to service mode
• LED blinking error codes
• White balance adjustment 

SONY KDL-55HX850 - KDL-55HX853 - KDL-55HX855

SELF DIAGNOSIS

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.

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 .

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 - >TV POWER LED BLINKING AND CAUSES 

STBY LED Flash time	Service menu Item name (Screeen Display)	Diagnostic Item Description
2	MAIN_POWE	Main 12 V failure
3	DC_ALERT	Main 5.0/3.3/1.2 V failur
	AUD_PROT	Audio amp. Protection
	HDMI_EQ	HDMI equalizer/switch I2C NACK
	TU_DEMOD	Tuner or demodulator I2C NACK
4	LD_ERR	LED driver failure/LED voltage protection
5	P_ID_ERR	Panel ID EEPROM I2C NACK
	HFR_ERR	FRC device I2C NACK
	TCON_ERR	FRC device Initialization failure
	TCON_ERR	E Micro (PEM) not started
6	BACKLITE	Backlight converter OVP
7	TEMP_ERR	Over temperature protection
	TEMP_ERR	Temp. sensor I2C NACK
8	-	Software Error (Also the main board’s memory or Wi Fi module is a suspect)
10	EMIT_ERR	Transmitter board not connected, protection 3D models only)

Since the diagnostic results displayed on the screen are not automatically cleared, always check the self-diagnostic screen.
After you have completed the repairs, clear the result display to “0”.

Clearing the Self Check Diagnostic List
1. Error history and Error count : Press the Channel 8 => Channel 0 .
2. Panel operation time : Press the Channel 7 => Channel 0 .

Exiting the Self-diagnostic screen
To exit the Self Diagnostic screen, turn off the power to the TV by pressing the POWER button on the remote or the POWER button on the TV.

HOW TO ENTER SERVICE MODE
1) Turn on the main power switch to place this set in standby mode.
2) Press the buttons on the remote commander as follows, and entering service mode.

DISPLAY > Channel 5 > Volume + > TV POWER

3) Service mode display.
Note: First of all, when you enter Service Mode, you can see “Digital” service mode. Whenever you press “OPTIONS” or “JUMP” on remote, each service mode is changed. “Digital” -> “Chassis” -> “VPC”

CHANGE DATA
Note: “Digital” service mode don’t have to Save. (except “002 MODEL” and “005 CHPRSET” category)
1) Change Data of “Digital” service mode. (except “003 DIG_SRV_MODE” category)
a. Press “2 / 5” on remote to select (up / down) category.
b. Press “1 / 4” on remote to select (up / down) Item.
c. Press “3 / 6” on remote change (up / down) data.
2) Change Data of “Digital” service mode. ( “003 DIG_SRV_MODE” category) “003 DIG_SRV_MODE” is one category of “Digital” service mode.
Please note because this operation is special.
a. Press “2 / 5” on remote to select “003 DIG_SRV_MODE”.
b. Press “1 / 4” on remote to select (up / down) Item.
c. Press “0 / 10” on remote to select item.
d. Press number key “1”~”9” directly. “*” stamp move.
e. Press “12 / enter / select” to decide and advance next step. Press “return”, when returning on the previous page

SAVE CHANGING DATA
1) Write data for “Chassis” or “VPC” service mode
a. Press “Mute” on remote.
It shows green “SERVICE” changes to green “WRITE”.
b. Press “0” or “enter” on remote. Green “WRITE” changes to red “WRITE”. It indicate writing is processing.
c. After a while, red “WRITE” changes to green “SERVICE”. Writing process is done at this point.
2) TV reboot is necessary for applying data change.

WHITE BALANCE ADJUSTMENT
Note: Please execute this adjustment if necessary.
Change Data of “VPC” service mode. (“006 WB” category)
a. Press “1” or “4” on remote to select WB adjustment menu.
b. Change data by pressing “3” or “6”. Each range of these items is 0~255.
c. Press “mute” 䋫”0” on remote to save the data.
“SERVICE” comment is changed to “WRITE”, indicating writing process.
d. After a while, “WRITE” comment returns to “SERVICE”, which means writing process is done.

VCOM ADJUSTMENT
Note: Please execute this adjustment if necessary.
1) Change Data of “VPC” service mode.
a. Select “002 VCOM” category by pressing “2 / 5” on remote.
b. Select “000 ENABLE” item by pressing “1 / 4” on remote.
c. Change ENABLE from “0” to “1” to enable VCOM adjustment.

d. Select “002 VCOM” category by pressing “2 / 5” on remote.
e. Select “001 ADJUST” item by pressing “1 / 4” on remote.
f. Change data by pressing “3 / 6” on remote controller.
g. Finish the adjustment when the picture seems OK.

Attention:
-Every time the data changed by pressing “3 / 6” Key, the VCOM pattern will display for 5s and in the mean time OSD will disappear, After the 5s period, VCOM pattern will disappear and OSD will display again.
The 5s time can be adjust by data change.
-If pressing the “3/6” key again during the 5s period, the VCOM pattern display time will be extended to another 5s.

SET TO SHIPPING CONDITION
How to do shipping condition.
a. Move to “Digital” service mode.
Press “8” on remote.
It shows green “SERVICE” changes to green “RST-”.
Press “mute” on remote.
Added green “EXE” after green “RST-” .
d. Press “0” on remote. Green “EXE-RST” changes to red “EXE-RST”. It indicate writing is processing.
After a while, red “EXE-RST” changes to green “SERVICE”.
And all LED lights.
Writing process is done at this point