Question about Televison & Video
I have a Phillips 42PF320A/37 Plasma TV (Chassis # BP2.3U) with red flicker, (see http://www.fixya.com/support/t246142-red_noise_or_flicker_bottom_half_plasma) and thanks to Premtech I've located two defected SMD diodes on the Y-Main Board. The reference designations are D5001 & D0018 and I'm unable to determine either Philips or commercial part numbers for these. They both have the marking F4 over 5J. The board is a Samsung PCB Code LJ41-02759A and Service Manual states that for Service it is a "Black Box" suggesting it's not repairable at component level and calls for board swap. I'd like to try and repair it.
Also, if someone the board schematic it would help me fault isolate associated circuity.
Not serviceable at component level, yeah right! They wish it isn't - it's a well known fact that electronics manufacturer's spare parts divisions generate more profit (with less revenue) than the retail units.
Long story short, we've serviced tens if not hundreds of those boards and we certainly aren't one of the biggest "unauthorized" service centers around.
I.e. we do not have a Samsung license and frankly, we don't need one.
LJ41-02759A is anything, but a black box and its weaknesses are well known within the service tech's community.
For D5001 you can use any 1A fast or ultra-fast rectifier diode with at least 200V reverse voltage. We use this:
If you need help, check out blog or contact us for service information.
Posted on Apr 30, 2010
Old Drummer, that is indeed a BB board... It's propritary... It's that way because Samsung doesn't want Philips stealing it's ideas to make their Tvs..
The only authorized center for those is PTS Electronics and I believe Tri State Module is about to get authorization soon... Other than that it is not replaceable at component level and those part markings will do you no good - they're not in any list that you'll ever find...
Posted on Nov 22, 2007
This is a follow up for others with the same problem. Thanks to Premtech's advice, I sent all 3 boards to PTS and they resolved problem by determining that the lower buffer board was defective and they repaired it. I now have a great HDTV. Thanks again Premtech.
Posted on Feb 22, 2008
I have a phillips plasma that is also having this same problem. I suspect it is this same PCB that is bad. Did you end up getting yours fixed?
Posted on Feb 16, 2008
YO tengo un samsung que presenta la imagen con brisa a la mitad, despues nitida y mas abajo con brisa como si fuera un problema de horizontal yo quite la y main y la voy a cambiar para mejorar ya que presenta tambien recalentamiento por la parte de arriba y abajo
Posted on Aug 21, 2008
A 6ya expert can help you resolve that issue over the phone in a minute or two.
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Posted on Jan 02, 2017
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