Samsung le46b530p7w

[sordids999]

Re: Samsung le46b530p7w

Ah tom i found the ready option and next to it says failure

[tom66]

Re: Samsung le46b530p7w

If you press OK when highlighting what does it do?

[sordids999]

Re: Samsung le46b530p7w

It won't let me highlight skips to next one down

[tom66]

Re: Samsung le46b530p7w

Well I have had a set before which had that option set wrong and it would turn on and off too. But it was full on/off not just backlight.

Have you checked INV ON/OFF voltageyet? On connector between main and power. If this voltage is not varying, no point chasing main board fault: it's not the main board that's bad.

[sordids999]

Re: Samsung le46b530p7w

No tom struggling to find which one this is sorry

[tom66]

Re: Samsung le46b530p7w

What are the labels on the pins next to the connector? One should be BL ON, or ON/OFF, or INV ON/OFF, or INV ON, ...

[sordids999]

Re: Samsung le46b530p7w

Pin 1 PS
Pin2 sync
Pin3 sb
Pin4 and
Pin5 gnd
Pin6 gnd
Pin7 13v
Pin8 13v
Pin9 gnd
Pin10 gnd
Pin11 gnd
Pin12 gnd
Pin13 5.1v
Pin14 5.1v
Pin15 5.1v
Pin16 5.1v
Pin17 gnd
Pin18 gnd
Pin19 13v
Pin20 gnd
Pin21 13v
Pin22 13v
pin 23 inv-on
Pin24 i-pwm
Pin25 e-pwm
Pin26 gnd
Pin27 5v-set
Pin28 and
Pin29 and
Pin30 gnd

[tom66]

Re: Samsung le46b530p7w

INV-ON on yours. Check voltage on this pin (red probe on pin, black on chassis) Does it vary?

[sordids999]

Re: Samsung le46b530p7w

4.8-4.9 volts

[tom66]

Re: Samsung le46b530p7w

Not dropping out when backlight goes out?

[sordids999]

Re: Samsung le46b530p7w

No mate still the same with backlight off

[tom66]

Re: Samsung le46b530p7w

OK that means the main board can be eliminated.
If you change the backlight setting to a higher level from the user menu does it cut out quicker?

[sordids999]

Re: Samsung le46b530p7w

That's the thing now tom the backlight in the menu are set on 10
But I'm still having to short out PCI801's everytime I restart the time then it will stay on for ages

[sordids999]

Re: Samsung le46b530p7w

The TV has been on most of the evening but backlight goes once u turn it off and on after 2 secs

[tom66]

Re: Samsung le46b530p7w

A permanent short across PCI801S does nothing?

[sordids999]

Re: Samsung le46b530p7w

No we tried that remember

[sordids999]

Re: Samsung le46b530p7w

Been reading up on net was thinking one of the lamps has gone in the panel which would draw more voltage to the invertor board but I read it cuts out the TV completely so it can't be that

[tom66]

Re: Samsung le46b530p7w

A bad bulb could cause this as could arcing between bulb and frame, both could be temperature sensitive. though usually would not be affected by that PCI801S.

[sordids999]

Re: Samsung le46b530p7w

So main board eliminated new power unit fitted replacement invertor changed lol that just leaves the tcon board unless its a bulb

[sordids999]

Re: Samsung le46b530p7w

tom if i test these invertor test points im getting about 180 volts on average but when the back light goes i get nothing is that right ?