Riddled TV Repair Forum

muckmail · Joined: 15 Oct 2011 Posts: 22

Yes,
The only voltage that I have measure when plugged in is
5v. I have not measured a voltage form the 12 or 14V pins.

Is the PSON a pin that the motherboard signals to the
PS to turn the 24V & 12 volts on? The pins are not
connected to the motherboard.

Thank you,

Google

JTS1957 · Joined: 21 Jan 2009 Posts: 1387 Location: Far, Far Away

muckmail · Joined: 15 Oct 2011 Posts: 22

No I have not tryed that yet.
It appears that I must that some resistance readings first?
What pins to I have to measure resistanc across?
I want to make sure I have the right pins on this.

Thank you,

JTS1957 · Joined: 21 Jan 2009 Posts: 1387 Location: Far, Far Away

It's exactly like taking voltage measurements - EXCEPT
1) TV unplugged, you don't want to expose DVM set on resistance to a voltage.
2) DVM set on resistance.
3) 2,3,6,7,10 or 11 (SGND) AND 8 (or 9), then 12 (or 13)

Preferably you need to have everything connected / plugged in while making measurements.

muckmail · Joined: 15 Oct 2011 Posts: 22

Before I do this test it looks like I am facing replacing a board in order
to repair this thing. I probably can't find a board for less than
50.00. I think I saw a PS for for 50.00 on ebay. No telling what
the motherboard would cost.

So it looks like I would have to spend 50.00 plus to repair it
in any case. Test or no test. Since these type of TV's are going
down in price, its probably not worth repairing unless there is an inexpensive way of repairing it that I am not aware of.

I am thinking Hundred something would probably buy a new one durring
the Holidays. Maybe??

If you think that I might find an inexpensive way to repair let
and I will continue with the test but other wise it might be a waste of
time to continue??

Let me know what you think.
Thank you,

Google

JTS1957 · Joined: 21 Jan 2009 Posts: 1387 Location: Far, Far Away

You don't read very well. Or maybe it's your comprehension.

1) As I stated earlier, I suspect the "Main board" (or as you're calling it, motherboard) as being the likely culprit.

2) The test I describe, depending on the results, should eliminate the Power Supply board as a possibility (IF the 12V & 24V fire up and the screen possibly illuminates when you connect 5VSB to PSON MOMENTARILY, I would say all is well with PS)

muckmail · Joined: 15 Oct 2011 Posts: 22

Ok,
If it is the mainboard we are still talking about $50+ dollars
to replace it. If it was the power supply there is $50+ dollars.
In order to make repairs we are looking at a board $50+ replacement
in any case. PS, mainboard or whatever I replace still looking at
a costly repair.
Thats the way the situation apprears.
Thank you,

JTS1957 · Joined: 21 Jan 2009 Posts: 1387 Location: Far, Far Away

One person's "costly" is another person's "reasonable."

muckmail · Joined: 15 Oct 2011 Posts: 22

I don't think this set is a real good set as for as specifications
but I could be wrong. I going to look at parts to see what can be purchased at what price then go from there then look at your
test.
Thank you,