1.) Been reading through these forums trying to pin down the exact part number for the YSUS and ZSUS boards and have found conflicting information. So...
YSUS =
6871QYH039B or
6871QYH039C
ZSUS =
6871QZH044B or
6871QZH044C
Which ones are correct?
2.) What is the difficulty level in plugging in the new boards? Where are they located? Difficult to access?
Thanks in advance for any help!
You can check the voltage through the X and Y sustain boards to see which is damaged.
Voltage travels the following direction on these TVs:
Power Supply:
http://www.discount-merchant.com/We-provide-factory-original-parts-worldwide-p/1 075235-zenith.htm
Then through Y-SUSTAIN:
http://www.discount-merchant.com/Y-SUSTAIN-PN-6870QYC004A-6870QYC004B-6870QYC004 C-p/vizio-sku9501.htm
By
the way.. This is the MOST POPULAR failing part on these TV's... Above
link has it for $154.99 and the quality and shipping time is
outstanding. Be careful buying from a used dealer or someone not as big
as Discount-Merchant is on parts. You may get a part that lasts 1/2 the
time. These boards are like DLP TV lamps, they have a limited lifetime
and if you buy from the wrong place, you will have to replace it more
often and it can damage other components when it pops!
Next Power travels through X-SUSTAIN:
http://www.discount-merchant.com/Vizio-SKU9502-p/vizio-sku9502-psp.htm
Again.. only $154.99 and this is the 2nd most common failing part on these TV's..
......
To test which board is bad you need a multimeter... then test for the following:
1.
disconnect the power board from the y-sustain board.. Check input into
power board (is voltage coming in from the wall?) Next, test for
voltage going out of the power supply.
2. Next test voltage
going to the Y-SUSTAIN BOARD by having everything connected except the
link between YSUS and XSUS. Check for voltage going into YSUS (if power
supply is putting out, then ysus shoudl be receiving).. Next, test for
high voltage comming out of the YSUS... keep in mind, xsus is
disconnected.
If you get power comming out of the YSUS, this means your YSUS is GOOD and your XSUS is BAD....
If you get no power comming out of the YSUS this means that the YSUS is
BAD.. in this case you need to replace your YSUS, however, you XSUS can
also fail when your YSUS blows out.
In order to test your
XSUS, you can use a multimeter to test breaking in the transistor
module that has the big Black or Silver heatsink on it. You can test it
by using a multimeter and applying it to the bottom pins of the board.
Again,
Discount-Merchant.com seems to have many of these boards in stock and
they are my lifesaver! The price is VERY LOW compared to anyone else,
and the quality is outstanding. 1 year buying these boards from them
without a single returned customer.
I bought one off of some
jimmy guy on ebay and it blew in 1 month. I though i was saving myself
money but the customer was back and very upset. Be careful!
First thing that you can do is use the Google serch by just typing in lg 50px1d and see if you get any thing close to what you need.
4,273 views
Usually answered in minutes!
So, after some more research, discovered that the letters indicate revisions (doh!)... so don't replace with 'A's, you want the 'C's if available.
Also discovered that board replacement of any kind on these sets is only a temporary fix... they WILL pop again. If I understand correctly, the PDP is pulling too much power, causing these boards to POP. The only real fix is PDP replacement...
Also, I answered my own question about the difficulties involved in board replacement... by removing the back panel to see for myself.
ANSWER: A monkey could swap out the boards if it wanted to! Well... a monkey that had a little bit of experience with PCBs, anyway. Or not, who knows... The point is: if you've ever installed a sound/video card in your PC, you have the expertise.
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