Hi everyone, first time post here under this topic, usually spend
the rest of my time browsing the broadband stuff. I posted this problem
on another site – the first one I came across (http://www.avforums.com/forums/rear-projection-televisions/882240-samsung-rear-pro-sp43w6hfx-xsa-convergence.html#post8318277), but haven't had any responses there.
Basically, the picture looks like this:
http://i285.photobucket.com/albums/ll65/cbrconvert/DSC04227resize.jpg
My reading leads me to believe it's a convergence issue, most people
seem to be replacing the IC chips. I've pulled the back off the TV for
a bit of a look, and they're very easy to get to. I also want to fix
this myself as the cost to repair is stupidly high, and I can buy
another TV set on ebay for half that price.
Here are the questions:
1. I've read that I should check the pico fuses – or any other fuses
for that matter. I have a service manual, how do I identify these
fuses? Where should I find them? Only on the "main power board" (as
described by one page) or are there some on the convergence board too?
2. It seems there are some resistors to check too – do i check them
all, or just look for some visual indication that it could be bad? What
happens when a resistor breaks? Can you identify it visually? or have
to use a multimeter?
3. The part number I need is STK392-040. Where in Australia can I
find these? I read that Sanyo or Panasonic are the better brands to buy.
4. What do I need to know when handling/taking out the convergence
board? I'm not supposed to touch the soldering with bare skin... touch
it at all? something about me being grounded since the TV is not
pluggged in... I haven't pulled it out yet, but I'll have to if I
replace the IC chips.
I'm new to all this, but I want to learn in the event I have to
repeat this for something similar. I think I've got the mind/patience
to learn this!
Thanks in advance for any help.
I'll post pics and report any progress as I go in the event someone else wants to do the same.
No one replied, so here's the result if you're following this:
1. Two new ICs cost $66 - had to get these outside of samsung since they have THE worst customer service ever.
2. Practiced de-soldering/soldering on an older computer board. Easiest way to get ICs out is to cut the wires coming out of the black box, and use plies to pull them out as you heat the solder on the reverse side. Once out, use desoldering braid to remove excess solder. I used isopropyl alcohol to clean.
3. Attach new ICs and solder all the pins - 42 pins to solder or something like that. Check no briding and clean.
4. install back in TV, use auto-convergence function, result: TV works again.
This is coming from someone who never had experience in soldering circuit boards. It's doable, but take your time, read up on soldering and take your time! Also get a decent soldering iron and tip - I spent a whole $15 on mine, and it did the job.
No one replied, so here's the result if you're following this:
1. Two new ICs cost $66 - had to get these outside of samsung since they have THE worst customer service ever.
2. Practiced de-soldering/soldering on an older computer board. Easiest way to get ICs out is to cut the wires coming out of the black box, and use plies to pull them out as you heat the solder on the reverse side. Once out, use desoldering braid to remove excess solder. I used isopropyl alcohol to clean.
3. Attach new ICs and solder all the pins - 42 pins to solder or something like that. Check no briding and clean.
4. install back in TV, use auto-convergence function, result: TV works again.
This is coming from someone who never had experience in soldering circuit boards. It's doable, but take your time, read up on soldering and take your time! Also get a decent soldering iron and tip - I spent a whole $15 on mine, and it did the job.
Thanks for this post. I to want to do this myself. Seems really high at the repair shop. After reading what you did, I believe this to be a do-able job. Thanks again