Samsung le46b530p7w

[sordids999]

Re: Samsung le46b530p7w

sorry 0.09

[tom66]

Re: Samsung le46b530p7w

OK, it looks like we've been chasing a wild goose. I should have asked you for that measurement before.

Check the pin 23 inverter on/off is staying HIGH from main board (connector going between main & power.)

[sordids999]

Re: Samsung le46b530p7w

if ive read pin 23 right on the main board
12.5 v

[tom66]

Re: Samsung le46b530p7w

That doesn't seem right -- it's probably the one right next to it. If it's a double row connector, maybe the one above it. See page #1 of schematic for the pin diagram.
[SCH].pdf&mfg=Samsung

[sordids999]

Re: Samsung le46b530p7w

your schematics hosting keeps timing out on me ? so ive upload some pics to see if that helps

[sordids999]

Re: Samsung le46b530p7w

ok found it reading is 4.9 v

[sordids999]

Re: Samsung le46b530p7w

could it be the main board then tom ?

[sordids999]

Re: Samsung le46b530p7w

hi any more ideas on this problem getting close to scrapping this one

thanks

[tom66]

Re: Samsung le46b530p7w

Try this, then:
http://www.toms-service-manuals.com/...df&mfg=Samsung

Had copied url wrong.

The BL ON signal is steady when it stops working?

[sordids999]

Re: Samsung le46b530p7w

tried again the backlight comes on when you first turn the tv on but after 5 mins it goes off again, i have to short PCI801 to get the backlight on again all voltages from the psu to main board seem steady even when the backlight switches off

[tom66]

Re: Samsung le46b530p7w

So a brief short across PCI801S gets the backlight going, but what about a permanent short?

[sordids999]

Re: Samsung le46b530p7w

no tom a permanent short will not work tried that when i first turned on the tv no backlight had to remove the wire then the backlight comes on,then when it goes off i just touch PCI801S to get it going again

[sordids999]

Re: Samsung le46b530p7w

ok totally baffled now if i do a picture reset in the menu the tv is still working its been 30 mins now and counting

[newtothis]

Re: Samsung le46b530p7w

ok totally baffled now if i do a picture reset in the menu the tv is still working its been 30 mins now and counting

Odd, I have an LED here that did the same... backlights kept shutting off... reset and works :S

[sordids999]

Re: Samsung le46b530p7w

opps spoke too soon picture gone well it lasted longer this time

[tom66]

Re: Samsung le46b530p7w

If you repeat the reset does it last again? Could be a coincidence.

[sordids999]

Re: Samsung le46b530p7w

coincidence

[tom66]

Re: Samsung le46b530p7w

I've got another idea but will have to wait for tomorrow when I am more awake. Some error detect is firing. UVLO is one of them but there is also a few others that can cause this issue.

[sordids999]

Re: Samsung le46b530p7w

ok thanks m8

[tom66]

Re: Samsung le46b530p7w

Just a thought before you go diving in checking things, have you inspected for cold joints and loose connectors?