TH-46PZ85U no picture

[dietzcj]

Re: TH-46PZ85U no picture

TNPH0721ABS ...any one have this ? I do not want to go to Ebay and pay $165 for this.
I'd rather just sell off these good boards.

[tom66]

Re: TH-46PZ85U no picture

Maybe it's possible to repair the D board if you post some detailed photos I can point out some things to test.

[dietzcj]

Re: TH-46PZ85U no picture

Will do, although I have 2 D boards so I will photo one of them and then test on the other.
( I bought a replacement that's why I have 2 of them)

[tom66]

Re: TH-46PZ85U no picture

Sorry, I meant to say the A board. D board is probably OK in your case.

[dietzcj]

Re: TH-46PZ85U no picture

Here is the best pic I can get with my old iPhone3g.

[tom66]

Re: TH-46PZ85U no picture

The power supplies are in the bottom right corner, see if you can get a clearer pic of this area.

[dietzcj]

Re: TH-46PZ85U no picture

here ?

[tom66]

Re: TH-46PZ85U no picture

Thats good did you use another camera?

Test the voltage across the black components with "68" written on them... they are caps.

[dietzcj]

Re: TH-46PZ85U no picture

the one labeled 68 are caps ?
Wow, okay. what setting should I use with the volt meter for these ?

[tom66]

Re: TH-46PZ85U no picture

the one labeled 68 are caps ?
Wow, okay. what setting should I use with the volt meter for these ?

Yep, tantalum capacitors. Different format to electrolytics and ceramics. More expensive too - you only tend to see them in better TVs, they have better reliability and lower ESR.

DC 20V will be fine.
TV with lit up screen but not functional.

[dietzcj]

Re: TH-46PZ85U no picture

You mean these right ?
With TV on, my Vmeter set to Dc20, and which side goes to witch ?
I assume the light side toward the end of the 68 is the neg ?

[tom66]

Re: TH-46PZ85U no picture

Yes, and the other, facing the other way.

Polarity isn't important, we're only looking for an absolute value here.

[dietzcj]

Re: TH-46PZ85U no picture

Sorry for being such a n00b at this, but I am confused with the multimeter setting.
can you cirlce that for me ?

[tom66]

Re: TH-46PZ85U no picture

See pic.
Also move probe from 10A DC to Volts/Ohms/mA jack.

[dietzcj]

Re: TH-46PZ85U no picture

Top one 1.84
1.32
3.28

[tom66]

Re: TH-46PZ85U no picture

OK - those seem OK.

There are two marked test points TP3502 and TP3506. There are F+15V and SUB9V.

Test the voltage on the test points; same range, red probe on the metal pad, black probe on the chassis of the TV.

[dietzcj]

Re: TH-46PZ85U no picture

There are F+15V and SUB9V

15.8 and 8.9 respectively

[dietzcj]

Re: TH-46PZ85U no picture

Also test point TP3518 15vs = 15.8
And then test point Tp4007 = 4.7

[tom66]

Re: TH-46PZ85U no picture

15V seems a little high but probably OK. I didn't notice there's also a 15VS at TP3518, test it the same. I'm heading to bed now, got lectures in the morning .

[dietzcj]

Re: TH-46PZ85U no picture

Anything else to check ?
Oh I have a question also about the Suffixes on the boards.
Is it possible to switch them to a different suffix ?