SONY KDL-52XBR2 – SONY KDL-52XBR3 LED BLINKING CODE SERVICE MODE BACK LIGHT POWER AND POWER SUPPLY CIRCUIT

SONY KDL-52XBR2 – SONY KDL-52XBR3 LED BLINKING CODE SERVICE MODE BACK LIGHT POWER AND POWER SUPPLY CIRCUIT

SONY KDL-52XBR2 – SONY KDL-52XBR3 

LED BLINKING CODE SERVICE MODE BACK LIGHT POWER AND POWER SUPPLY CIRCUIT  

SELF-DIAGNOSTIC

Diagnostic Test Indicators
When an error occurs, the POWER 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. If the errors occur simultaneously, the one that corresponds to the fewest fl ashes is identified first. Results for all of the following diagnostic items are displayed on screen. No error has occurred if the screen displays a “0”.

1. TV must be in standby mode. (Power off).
2. Press the following buttons on the Remote Commander within a second of each other:
DISPLAY  > Channel 5 > Volume - > TV POWER .

LED BLINKING CODES AND DESCRIPTION 

Led blinking	Description	CAUSES
2	Tem	Panel temperature error. failure may be on the AU board
3	P-OVP	Over voltage condition . failure may be power board
6	POWER	PFC fault --- power board
7	AUDIO	Dc voltage at speakers – mother (AU)board audio section
8	PANEL	Panel error may be D4 or D5 board . View tv from the front in the dark room. If left half lights briefly  but right half does not light before shut down the there is problem in D4 board. If in reveres then the D5 board is fault.If panel does not light at all the verify LVDS cable is properly connected from the BE board to TCON board.

ACCESSING SERVICE ADJUSTMENTS
To adjust various set features, use the Remote Commander to put the set into service mode to display the service menus.
1. TV must be in standby mode. (Power off).
2. Press the following buttons on the Remote Commander within a second of each other:
DISPLAY > Channel 5 > Volume + > TV POWER .
The first service menu (TV) displays.
3. To display the service menu that contains the category you want to adjust, press JUMP on the Remote Commander.

The screen displays the first category in the selected service menu.

4. To change the category, press 2 or 5 on the Remote Commander.
Note: Pressing 2 or 5 only changes the categories within the service menu displayed. To change a category on one of the other service menus, press the JUMP button until the correct service menu is displayed.
5. To change the adjustment item, press 1 or 4 on the Remote Commander.
6. To change the data value, press 3 or 6 on the Remote Commander.
Note: To go back to the last saved data value, press 0 then ENT on the Remote Commander to read the memory.
7. To write into memory, press MUTING then ENT on the Remote Commander.
8. To exit service mode, turn the power off.

WHITE BALANCE ADJUSTMENT
Adjust the White Balance using the User Menu and the Service Menu
when you replace boards or the LCD Panel.

USER MENU ADJUSTMENTS
Use the following procedure to adjust the items from the User Menu
before adjusting items in the Service Menu.
Press the LEFT/RIGHT /UP /DOWN to move the on-screen cursor. Press ENTER to select /confirming item
1. Display the User Menu by pressing MENU on the Remote
Commander.
2. Select the Settings option.
3. Change the Picture Mode to Custom.
4. Select the Backlight option.
a. Set the Backlight option to MAX

5. Select the Advanced Settings option.
NOTE: The Advanced Settings option is only available after you
select Custom from the Picture Mode.

a. Set following registers to Off:
Black Corrector
Advanced C.E.
Gamma
Clear White

b. Select the White Balance option.
c. Set the R, G, B Gain and R, G, B Bias to 0.

6. Put the TV in standby mode. (Power off).

SERVICE MENU ADJUSTMENTS
Use the following procedure to adjust the Service Menu items for White Balance Adjustments.
NOTE: GAINR, GAING, & GAINB are White Balance Adjustments for Highlight and OFFR, OFFG, & OFFB are White Balance Adjustments for Offset. . 1.Access the Service Menu

2. Press the JUMP button until the DE Micro service menu displays.

3. Press 2 until the 6 MAIN_WB category displays.
4. Press 1 until the 4 GAINR item displays.

5. Press 3 to increase or 6 to decrease the data value.
(Do not increase the GAINR data value higher than 520.)
6. Repeat steps 4 & 5 for each of the following items:
a. 5 GAING (data value is fixed at 512)
b. 6 GAINB - Do not increase the higher than 540
c. 8 OFFR
d. 9 OFFG (data value is fixed at 512)
e. 10 OFFB
7. To write into memory, press MUTING then ENT on the Remote Commander.

Text color changes to red when saving.

8. To exit service mode, turn the power off.

POWER SUPPLY CIRCUIT 

BACK LIGHT POWER 

MAIN POWER SUPPLY 

CLICK ON THE IMAGE TO ZOOM IN 

SONY TV SERVICE TIPS

SONY K KV27S45

AUDIO PROBLEM

Unit has a very rapid change in volume when increasing the level from minimum to 4 notches above minimum

SOLUTION

Needs to add a resistor in parallel with R432 to effectively reduce the value of R432. This changes the voltage divider ratio to the volume control circuit and makes the volume circuit more linear in operation.

SONY KV32S65

AUDIO PROBLEM

Sound and picture is fine but when the fixed or variable audio out is connected to an external audio amp and the set is muted a loud pop is heard in the right channel.

SOLUTION

Try to measure if there was any DC voltages that resided on the Variable audio output connectors. There was "4.5" volts on the Right channel and "0" volts on the left channel. When the "Mute" transistors on the variable line triggered they pulled both lines to ground. When the external amp was connected to this circuit the input capacitor for the right channel charged with this 4.5 volts. Still had audio on this line even though it was at a 4.5 vdc potential. But when the Sony muted, the input capacitor inside the Big External amp discharged and caused a tremendous pop. C172 is a .47mfd used to decoupling the audio from IC101 the Variable audio control IC. This capacitor had 4.5 vdc on each leg measured to ground. Removing the capacitor and measuring the DC resistance across the cap measured 175 ohms. Replacement of the capacitor corrected the symptom