Question about Sony FD Trinitron WEGA KV-32HS420 32" TV

2 Answers

Tube does not turn on

Picture tube stopped coming on and stand-by light sometimes blinks 6 times intermittently and 7 times intermittently. I got the picture to come back on but when I turned the power off it went back to the same problem

Posted by svillegas on

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Anonymous

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If TV model is Sony KV-32HS420 then mostly it requires to replace 2 ICs on DZ board, let me know if you can replace ICs on circuit board and know about TV repair to provide you more technical info.
Thanks.

Posted on Sep 16, 2009

  • gregl1 Dec 16, 2010

    I'm having the same problem on my Sony KV-32HS420. I'm pretty sure I can replace 2 ICs on a DZ board, if I have the schematic and instructions about danger areas. Can you supply this information? Thanks,

  • cworthem Mar 04, 2011

    I too have this problem that is described. I have over 15 years for electronic background and would like detailed instructions on what and how to fix this type of issue. Please advise how to get in touch with you. Thanks in advance!

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  • Contributor
  • 28 Answers

I quoted this and I hope it defines your problem.

No picture (screen not lit), no sound:

If your TV does not turn on, and a red light keeps flashing, your TV may
need service. Call your local Sony Service Center.

Make sure the power cord is plugged in.

Press the POWER button on the front of the TV.

Press the TV/VIDEO button to cycle through the connected video sources.

Try another channel; it could be station trouble.


I hope that helps,

Tiger720

Posted on Sep 16, 2009

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Blinks twice pause blinks 4 times

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]
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No picture blinking stand by light

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