SONY KDL52XBR3 TURN OFF AND STAND BY LED BLINK 7 TIMES IS AU BOARD BAD OR POWER SUPPLY.

Probably a faulty backlight ot invertor board, slight chance it has a main board issue.
Unlikely to be power supply.

Hello Sagar,
green led means tv powered on and status ok.
Red blinking light almost always means defect, overcurrent or overload.
6 blinks for Sony lcd flat tv means trouble in backlight circuit, or backlight inverter (backlight illumination or lighting makes your tv screen visible).
common problems in the inverter circuit, which drives the backlight, or shorted drivers, or short-circuit transformers or open circuits.
You should find the problem in the inverter circuit, or in the power supply board or in the main board.
Also look for bad capacitors (electrolytic caps) which are bulged and swollen on top.
Decoupling plugs from printed circuit boards can help you in finding the problem board by elimination method.
If you power up the set after unplugging certain plugs on f.e. the inverter board , this could result in getting a green power led and concluding that this board is faulty.

succes,
Walter from Antwerp, Belgium.

...and?

Tv power supply board is having problems,that the board where the power a/c cord plug into it.Tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.

KDL- Bravia blink codes (Australian):
2 times-Main power supply voltage error (12V, etc)
3 times-Malfunction of 3.3V line
4 times-Malfunction of 5V line
(Voltage Supply to FE, etc)
5 times-Malfunction of power supply for screen
6 times-Malfunction of inverter or overcurrent, etc
7 times-Abnormal temperature inside unit
8 times-Audio circuit error (amplifier, etc.)
9 times-Fan malfunction
10 times- Digital FE circuit error
11 times-Malfunction of Trident IC or around IC
12 times-BH board error
13 times -Malfunction of balancer
If this is correct the 5 blinks is the power supply having problems, I would much rather change the PS than replace the screen. Also if screen is determine bad, look for class action lawsuit on Sony for defective screen, i am told they know all about this.

Physically disconnect the SU board and the SD board. (See precaution # 5)

Plug in the TV and turn it on.

Does the TV shut down and the power LED

blink 7 times?

Yes

No

Replace the Panel and the SU board.

(See precaution #3)

Reconnect the SD board only.

(See precaution # 5)

Plug in the TV and turn it on.

Yes

No

With the SU board and the SD board still disconnected, remove connectors SC2 and SC20 from the SC board (See precaution # 6)

Plug in the TV and turn it on.

Disconnect the SD board and reconnect the SU board. (See precaution # 5)

Plug in the TV and turn it on.

Yes

No

Replace the Panel, SD, and SU board.

(See precaution #3)

Replace the Panel and the SD board.

(See precaution #3)

Replace the SC board.

(See precaution #3)

No

Replace the D board.

(See precaution #3)

Does the TV shut down and the power LED

blink 7 times?

Does the TV shut down and the power LED

blink 7 times?

Does the TV shut down and the power LED
blink 7
There is a sequence that you have to check to figure out which board is bad,

6 times blinking standby light indicates problem with Audio Section in tv
Check AU 15V output of G2 (power supply) board then check AU board as it has sound processor and sound output ICs.
If you are not familiar with electronics stuff repair then call local tv repairman to repair it for you.
Thanks.

Hello,
Your power supply board is dead, u know basic electronics' and soldering? Most of the times, the power supply board just have dead leakages gases capacitors.These capacitors always bulges up on it top,or puff up on it top.Replaced these gases leakages capacitors will get your TV power stable,and work again.Or tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.

Hope this helpout in solving the problem

Power supply board of either this could be a lamp issue

SYMPTOMS
Dead or Shutdown symptoms.
RESOLUTION
Dead symptom reported to be caused by the following:
1. Dead.
Found Q601 & Q602 shorted, R615 open, and IC600 on the A Board were the cause of the symptom.

2. Dead.
Found D614, Zener diode, on B+ line was shorted.

3. Set shutdown and the standby LED blinks 3 then 5 times.
Found 200v line was low. Disconnected CN706 on the C Board and found 200v now
present on CN706/pin 7.
Found: IC702 (C board) shorted the 200 volt line.
HQ Comments: C541 on the A Board could become defective if the 200v line is shorted since
the polarity on the capacitor will become reversed. R553 fuse resistor could also be opened
on the A Board.

4. Error code of 4 blinks .
Dead set press power button you hear the relay and you see red led flash 3 times and stops? Has no HV or other action. Tech removed the back as no 200 volt supply, did unplug CN706 and now has 200volts. Tech did remove the IC702 and same it comes up so needs this IC.

5. Dead. 5 blinks then 3 blinks. Found shorted Damper diode D504. Q502 has a built in damper, as well.

6. The TV does not turn On and the LED flashers 9 times.
Found one side of R610 open on the Base of Q690 on the A board.

7. Dead, 9 flashes, Q606
Would not start when cold, has stand by 5 but relay never energize.
No response from front panel or remote controls.
9 blinks is not in service manual.

Found Q606 (Zero Det.), on the A Board, had no soldered on the collector
of the transistor causing an intermittent connection.
Soldered the collector of Q606 and set returned to operation.
HQ Comments: Also refer to E30968554.

8. Dead. 5 blinks or 3 blinks
Found on the A Board D611 in the Power Supply open, and Hor. Output Q502 shorted.

9. Found Power Supply components D611 shorted causing Q600, Q601, and R615
to fail on the A Board.

10. No picture or sound. Standby flashes.
Found Q512 (Pin Out) shorted. on the A Board.





11. Dead. No sound or picture.
Found the FBT and Q502 were shorted, and R615 open on the A Board.

12. Dead
No power, Stand by light flashes 4 times.
Found T604 and IC601, replaced.
Found D611 on the A Board was the cause of the symptom.

13. Dead.
Found D534 shorted on the A Board.

14. Shutdown 4 Blinks.
Replacing R595, OCP Latch Q532 on the A Board, fixed the set.
PN 1-247-891-00, 330K 1/4 watt.

15. Unit shuts down after 15 mins.
Immediate shutdown - sometimes it give a 3 blink, sometimes nothing.
Found R595 (330K) was open located in the Q532 OCP Latch circuit.
R595 P/N 124789100 330k 1/4w

16. Won't power up. LED Blinks 4 times, B+ is very low
B+ is at 49V, +15/-15 only coming up to about 1 volt.
Wth Hor Out disconnected B+ only comes up to 50v.
Found D611 on the A Board was the cause of the symptom.

17. Intermittently does not turn on
Found a intermittent C633 on pin # 3 of IC600.
C663 P/N 113647911 Film cap .001uf 100v



Billy

If you need the service manual contact me at:[email protected]