Hi
I have this tv with no power, no led glow on front panel, i checked low voltages 3.3v and 1.8 v and its ok.
I think tv is in protection mode but there is no any led glow on front panel , no HV ,
I have schematics but still confused form where to start.Both mosfet in power supply and h-output is ok.
Any help please.
Thanks
Manoj

Sony KV-SW292M80

Verify all power supply voltage values.

Note that tv have fuses im low side voltages circuits.

hi
zurca1599
i check everything , fuse on low volt side is ok.

i am confused why there is no any front led activity?? if main chip get 1.8 v there must be some blinking led on front panel??
Thanks
Mac

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_
Hello:

May be the tv is in protection,more important is to check the
IC607 output (5V regulator) than 3.3V and 1.8V,because Q512
(vertical guard deflection) needs 5V to activate.
Take a look to the vertical output STV9325.
Good luck.

The controller are a very complex ic.

How it work if there are no +5 and +9 v on pins 82, 84 of controller ?
I dont have na answer to it , see below - no led glow .

You can verify led and de led driver circuits Q3902, Q3901 and singnal from controller pins 6, 7 .

Reading manual:

If error happens led should blink.

The manual says that no led glow means "•AC power supply is faulty."

Hi,
Thank you , inadim and Zurca 1599. For prompt reply,
I will check and let you know.
Thanks again.
I found some tips of is chassis ,that I going to share with you,

Low or no HV C6532 (.056uF/800V, #113599821)

Resolder D659

D647 (#650056701, on A board)

D6303 SMD leaking or shorted. It is next to the relay RY6001. I put a 1N4148

Resistor 608 22M

zener diode 010 d changed exchange

R630 (330K) fonte

f meeting the ic power, resistencis 1k, the opt, and burned zener.
o/c print around D609

R600 39k 5W in PSU (1-216-490-11)