Baird JO37BAIRD(A) No Power

[Mikeyboy2007]

Re: Baird JO37BAIRD(A) No Power

circled the pin mate, thanks

sorry its actualy the one to the right hand side of the one circled

[tom66]

Re: Baird JO37BAIRD(A) No Power

Right, so 5VSB measures 1.7V. This is the fault. What does it measure with the main board installed and with it removed?

[Mikeyboy2007]

Re: Baird JO37BAIRD(A) No Power

its registering 1.6V-1.8V with main board disconnected and -00.0V with mainboard plugged in, is that possible or am i doing something wrong do you think ?

[tom66]

Re: Baird JO37BAIRD(A) No Power

Make sure you're touching the metal shroud around the pin.

[Mikeyboy2007]

Re: Baird JO37BAIRD(A) No Power

yeah mate Main board plugged in its reporting 1.8V and unplugged its returning 0V ??

[tom66]

Re: Baird JO37BAIRD(A) No Power

Do you have any video inputs connected to the unit at present?

[Mikeyboy2007]

Re: Baird JO37BAIRD(A) No Power

no mate nothing whatsoever the cable that connects to the pins is disconnected, should that be connected, if it is im gonna feel so dumb

[tom66]

Re: Baird JO37BAIRD(A) No Power

It should be connected while making measurements except when indicated otherwise.

[Mikeyboy2007]

Re: Baird JO37BAIRD(A) No Power

how can i measure the voltage on the pins with the cable connected ? but useless i know but thanks alot with the help

[tom66]

Re: Baird JO37BAIRD(A) No Power

There's a small bit of metal around where the pin goes into the connector, that's where to measure.

[Mikeyboy2007]

Re: Baird JO37BAIRD(A) No Power

ok so i stuck the red probe in at the top of where the pin meets the cable and it is returning 1.4-1.7V with the mainboard connected and with the mainboard disconnected its returning the same voltage

[tom66]

Re: Baird JO37BAIRD(A) No Power

Is it stable or bouncing?

[Mikeyboy2007]

Re: Baird JO37BAIRD(A) No Power

its just bouncing between 1.4 - 1.8 volts

[tom66]

Re: Baird JO37BAIRD(A) No Power

In which case, I am struggling to see how the user heard of a "pop" from the TV.
Seems like an ordinary start up cap fail or shorted diode.

Remove the power board and test all diodes for shorts. Do you need help with this?

[Mikeyboy2007]

Re: Baird JO37BAIRD(A) No Power

yeah mate im new with the multimeter and the testing of things, sorry to be a bother

[tom66]

Re: Baird JO37BAIRD(A) No Power

This is a diode:
http://www.google.co.uk/imgres?imgur...9QEwAg&dur=576

Remove power board from TV.
Locate any components that look like as above.
Test in both directions: you should get a reading in one direction, and a "1" in the other direction.

[Mikeyboy2007]

Re: Baird JO37BAIRD(A) No Power

ok mate will get ack to you soon

[Mikeyboy2007]

Re: Baird JO37BAIRD(A) No Power

This is a diode:
http://www.google.co.uk/imgres?imgur...9QEwAg&dur=576

Remove power board from TV.
Locate any components that look like as above.
Test in both directions: you should get a reading in one direction, and a "1" in the other direction.

what should i have multimeter set to ?

[tom66]

Re: Baird JO37BAIRD(A) No Power

Diode test mode. Looks like the symbol under the device I linked to.

[Mikeyboy2007]

Re: Baird JO37BAIRD(A) No Power

ok readings from them are 281, 568, 567, 631, 590, one was reporting back 0 no matter which way i put the probes. had to do it from the underneath of the board as i couldnt get into any of them on top.. have a picture to show which one was reporting back as 0 both ways