Question about NEC PlasmaSync 42MP3 42 in. Television
One and a half inch black vertical line on my NEC PlasmaSync 42 MP3. Possible display panel failure (From what people say on the Internet). Warranty expired. Contacted NEC support but the want £300 just to take it for repair without giving any estimate and I am not sure if I should just throw it in the bin and buy a new one.
SOURCE: Horizontal lines on NEC plasma
Intermittent horizontal deflection
Resoldered the pins of horizontal deflection transformer
Picture is horizontally narrowed and deformed
Capacitor C2913 (390nF, 250V) on the deflector PCB had lost capacity
Geometric distortion, Pillow, and picture enlarged horizontaly
The problem was a short from GND to pin 11 inside IC301 (TDA8350Q). This pin is the output of amplifier for geometric correction signal. Replace IC301
Posted on Nov 26, 2007
SOURCE: NEC PX-42VM3A 42" Power problem
I have read that this has been fixed with little more than a hard reset. This means just unplug your set for 10 minutes or so and let all the power seep out of the boards and capacitors, then plug it back it.
If that didn't fix it, your unit needs servicing. If you are handy here are some troubleshooting steps:
Check the fuse at Y-Sustainer pcb.
If blown do not replace. Look instead at scan converter boards. They are connected between y-sus & plugs from display (left side with face down, back open). Look for signs of 'burning' at upper and lower long boards. If any imperfections are found, replace all three boards: Y-sus, up & low scan.
If fuse was okay, check power supply for bloated capacitors (big board in middle of set).
I hope that helps.
Posted on Apr 19, 2010
Please inspect the power supply, y-sustain, and Z-sustain boards for blown fuses, caps, blown parts first.
Basic LCD monitor and TV troubleshooting guide:
Failed TV and Monitors: http://s807.photobucket.com/albums/yy352/budm
Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps.
Or www.digikey.com, just make sure to use caps with low ESR, 105c, high ripple current and long life rating such as PANASONIC FM or FC series.
Please post back what you find.
Please leave rating if it helps.
Posted on Jan 21, 2011
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