Baird JO37BAIRD(A) No Power

[tom66]

Re: Baird JO37BAIRD(A) No Power

L4 isn't a diode, unfortunately. Can we see pictures of the underside of PSU (green side)

[Mikeyboy2007]

Re: Baird JO37BAIRD(A) No Power

hope these pictures help

[tom66]

Re: Baird JO37BAIRD(A) No Power

Can you read the part #s off these ICs?

[Mikeyboy2007]

Re: Baird JO37BAIRD(A) No Power

just aswell ive got magnifier lol 1st circled is KFP then has something very very small beside those enitials then second is 16068 PBUS OR FBUS cant realy make it out

[tom66]

Re: Baird JO37BAIRD(A) No Power

Can't find data on either of those. Are you sure of those markings?

[Mikeyboy2007]

Re: Baird JO37BAIRD(A) No Power

1st one could possible be VFP ?

nope deffo starts KFP

[Mikeyboy2007]

Re: Baird JO37BAIRD(A) No Power

1606B PBUS and and the KFP one is too small to make out whats beside those enitials

[tom66]

Re: Baird JO37BAIRD(A) No Power

One is probably http://www.onsemi.com/PowerSolutions....do?id=NCP1606.
The other we will have to reverse engineer.

Can I get a closer shot of this area, preferably in several pictures?

[Mikeyboy2007]

Re: Baird JO37BAIRD(A) No Power

hope these are clear enough

[tom66]

Re: Baird JO37BAIRD(A) No Power

Test these devices. To test:
- Meter on diode test
- Middle pin red, black probe on one outer pin, note reading
- Middle pin red, black probe on other outer pin, note reading
- Middle pin black, red probe on one outer pin, note reading
- Middle pin black, red probe on other outer pin, note reading

Power must be OFF.

[Mikeyboy2007]

Re: Baird JO37BAIRD(A) No Power

as followed in that order

1
1
277
163

[tom66]

Re: Baird JO37BAIRD(A) No Power

Did you do both?

[Mikeyboy2007]

Re: Baird JO37BAIRD(A) No Power

yeah sorry should have been

1
1
277
277

1
1
162
163

[tom66]

Re: Baird JO37BAIRD(A) No Power

Both diodes appear OK.
Looking on the top of the board there are capacitors EC3 and EC4.
Are their leads exposed allowing measurement across them while in circuit?

[Mikeyboy2007]

Re: Baird JO37BAIRD(A) No Power

yeah, would i have to plug power board back into tv to measure that

[tom66]

Re: Baird JO37BAIRD(A) No Power

Just asking if you can manage it before I ask you to do it.

[Mikeyboy2007]

Re: Baird JO37BAIRD(A) No Power

yeah the leads are exposed

[tom66]

Re: Baird JO37BAIRD(A) No Power

So, can you measure across them while the TV is powering up? Here is where we really need to get that part# on the 6-pin chip -- without it, we don't know what voltage is required, although it's usually >7V.

[Mikeyboy2007]

Re: Baird JO37BAIRD(A) No Power

im trying to make it out mate and it looks like KFP 7V then another 2 letters or numbers

[Mikeyboy2007]

Re: Baird JO37BAIRD(A) No Power

it looks like KFP 37V 51