Question about Pioneer SD-533HD5 53" Rear Projection HDTV

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Have a SD643HD5 pioneer projection tv. On the power board 4amp fuse kept blowing, so I took out the board and found several loose solder points and one of the fast rcovery diodes that come right off the fuse only number on it is #YG91152. they are square about 1/2 inch each way with a tab that sticks up with a hole in it. tried to find at several supply stores but no cross referance found. Could the loose connections have caused all this or do you think it is deeper than that? Do you know where I can get this diode?

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Posted on Jan 02, 2017

techman
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SOURCE: Pioneer SD-532HD5

This fault happens with just about any tube type projection set. The convergence IC's simply need to be replaced. They are two black, 2"X3", stand up ICs that will start with the letters STK on the surface of them and are mounted up against a large metal heatsink. If you have the soldering skills this should not be so hard for you to do, but please if you do not have the skills or experience to replace these IC's call in a pro to assist you with this repair. Good Luck

Posted on Mar 28, 2007

  • 298 Answers

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Hello,

You can find those parts for your model in the links below.

Sony KP-57WS520 D6116 Replacement Part
Sony KP-57WS520 D6301 Replacement Part

Posted on Apr 10, 2008

dmftrucker
  • 1922 Answers

SOURCE: I have a Pioneer SD643HD5 and it keeps blowing a fuse.

your audio output transistors or driver transistors are shorted

Posted on Sep 13, 2009

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What you can do is get yourself a service manual from here:
http://servicemanuals.vstore.ca/

They also have spare parts and offer free online advice as you attempt a DIY. The issue is most likely a cold solder somewhere on the power board or some faulty capacitors. If you want to go in for a long term solution, you can easily replace the whole power board or just change the faulty capacitors. You will have to open the back panel and take a look. You can make out which are faulty, because their caps will be swollen on top. Here's a sample pic of a bust capacitor (not same model):
94fcd26.jpg
Check the specifications of the faulty capacitors, and get the replacements from your local electronics shop. If you are comfortable with this, you can use a pair of needle nose pliers to G-E-N-T-L-Y pull out the defunct capacitors. Once that is done, solder in the new capacitors carefully. If are unsure how to do this, try to get a friend who knows this kinda stuff to do it for you, or get a qualified technician.
Warning: If you do not have a background in electronics repair, or are inexperienced, get a qualified technician to do it for you.

REMEMBER there are very dangerous voltages inside a TV that can KILL. Be sure to work SAFE when dealing with electricity. DISCONNECT THE POWER BEFORE YOU DO ANYTHING.

Hope that helps!

Sep 26, 2008 | Pioneer SD-P55A3-K 55" Rear Projection...

1 Answer

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I would suggest replacing the board itself, chances are what caused those fuses to blow is still faulty. did you check those fuses again after you powered it back up?

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Pioneer SD533HD5 repair, blown STK's or bad power assy?


Go back recheck everything 6amp fuse in middle of power supply board that will blow, also solder everything that looks like poor connection pioneer always has a lot of cold solder jionts.CK all pico fuses they are green,yellow look like resistors but are fuses.

Jun 15, 2009 | Pioneer SD-533HD5 53" Rear Projection HDTV

1 Answer

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Nov 01, 2008 | Pioneer SD-532HD5 53" Rear Projection...

1 Answer

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One of your convergence IC's have probably gone bad. This is a common problem after 5 years or so on that model (happened to my SD643HD5). You have a few choices:
1) Fix it yourself by replacing the IC's, by soldering new ones in. See this website for details:
http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm
That website also shows pictures of what the problem looks like.
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Oct 25, 2007 | Pioneer SD-533HD5 53" Rear Projection HDTV

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