bush DLED32165HD startup issue

[Mikeyboy2007]

ok guys another crap tv with vestel boards, this Bush DLED32165HD tv trys to start up. i get 5 steady blinks then it misses a blink and gives me another 5, im guessing this is an error code does anyone know ? is there any firmware for this tv i could try ?

[tom66]

Re: bush DLED32165HD startup issue

Have you checked if the PSU works first?
Vestel sets don't use error codes (afaik)

[Mikeyboy2007]

Re: bush DLED32165HD startup issue

i will test PSU and check voltages and update post.

[Mikeyboy2007]

Re: bush DLED32165HD startup issue

Tom how would i go about checking this PSU as the pins overlap each other ?

[Agent24]

Re: bush DLED32165HD startup issue

Carefully is how... :p

You could use test hooks if you have some really small ones, or take the boards out of the set and probe the back side.

Another option would be to solder wires on the underside and connect to those.

[Mikeyboy2007]

Re: bush DLED32165HD startup issue

ok unscrewed both power and main as there connected together, flipped upside down, plugged tv in and tried to switch on but got 0v reading from all pins with multimeter set to 20v am i doing something wrong ?

[Agent24]

Re: bush DLED32165HD startup issue

Hard to say. Did you disconnect anything?

Also, make sure you don't let the boards short out on anything.

[stj]

Re: bush DLED32165HD startup issue

maybe the frame is used as common ground - i hate that!

[Mikeyboy2007]

Re: bush DLED32165HD startup issue

i just too flipped them upside down everything connected, tv light still flashes as if trying to switch on so i know there is power there just dont show anything on the multimeter.

[budm]

Re: bush DLED32165HD startup issue

ok unscrewed both power and main as there connected together, flipped upside down, plugged tv in and tried to switch on but got 0v reading from all pins with multimeter set to 20v am i doing something wrong ?

What are you using for the GND ref for your meter? The Secondary side circuit GND is connected to the chassis when the boards are mounted to the Chassis.

[Mikeyboy2007]

Re: bush DLED32165HD startup issue

for the GND i was using a hole on the chassis on the back of the screen, is that suitable ?

[budm]

Re: bush DLED32165HD startup issue

If the boards are not mounted to the metal chassis then the circuit GND is not connected to the chassis, if you look at the circuit board mounting holes you should see exposed copper pads which will have trace going to the negative legs of the power supply output filter caps, you can then use those pads for your meter GND ref. point.

[Agent24]

Re: bush DLED32165HD startup issue

for the GND i was using a hole on the chassis on the back of the screen, is that suitable ?

Not if the boards aren't connected to it. Then it isn't ground, it's just a piece of metal. You need to use the actual ground connection on the board.

[Mikeyboy2007]

Re: bush DLED32165HD startup issue

What if i use speaker wire and use it to ground the PSU to the chassis of the tv ?

[tom66]

Re: bush DLED32165HD startup issue

You could do that but why wouldn't you just use the ground on the board. You are just overcomplicating it.

You must use the secondary side ground, i.e. nothing on primary/live/danger side....