Question about ViewSonic N3250W Television
This power supply board is also used in Viewsonic VX2835W. The main problem are 4 bad/defective capacitors and shorted legs due to bleeding of soldering lead (brownish color).
1. 22uf 400v
2. 47uf 50v
3. 1uf 100v
4. 22uf 35v
You can find them near the PWM IC controller (U601). Replaced all these capacitors regardless they look good. I pulled them out off the board and tested them with my Blue ESR and capacitor tester and found 3 were defective.
Next, you need at least 97% Isoprophyl alcohol and toothbrush to clean the soldering paste. Due to overheating on the primary section / HOT section the soldering leads tend to produce brownish paste which is causing the component parts to SHORT. Concentrate at the back of the board, especially at the U102 (16-pin IC) and Q202 by scrubbing these IC and transistor carefully. I used magnifier to make sure the legs are clean and shiny. Clean the rest of the back and some part on top of the board. Let it dry for 2 hours at least. I did 2 times this cleaning to make process.
On my VX2835W main board has 2 bad capacitors at C124 and C126. I replaced them and cleaned also the board with alcohol.
That's it. Good Luck.
Chapel Hill, NC
Posted on Nov 12, 2011
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
Here's a link to this great service
Posted on Jan 02, 2017
Tips for a great answer:
Feb 27, 2014 | LG 37LH20 37 in. LCD HDTV
May 01, 2013 | HP w2207 Monitor
Mar 19, 2013 | Mitsubishi WD-52525 52" Rear Projection...
Apr 19, 2011 | Vizio Televison & Video
Apr 13, 2011 | Televison & Video
Feb 12, 2010 | Samsung LN26B360 26 in. LCD TV
Nov 27, 2009 | Polaroid TLA-01511C 15 in. LCD Television
Nov 24, 2009 | Televison & Video
Nov 20, 2009 | Polaroid TLA-01511C 15 in. LCD Television
Mar 22, 2007 | Mitsubishi WD62628 62" Projection HDTV
Feb 15, 2018 | ViewSonic N3250W Television
1,646 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: