Question about Sony Grand WEGA KDP-57WS655 57" Rear Projection HDTV

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Need Instructions to replace D Board in Sony KDP57WS655

D Board Part Number A-1065-548-A needs to be replaced.

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Its a picture tube type rear projection---you face several issues here---

1. Finding a good replacement board
2. The D board is to the left as seen from rear.
3. multiple black foldover plugs on one side.
4. multiple plugs to board itself (two groups of 3 identical plugs to make sure you mark to get back exactly where removed.
5. multiple tiny brass screws that secure the board to the black plastic frame.
6. Two red wires from flyback (one fat and one thin) to remove--the thin one goes forward and can be pulled off where it connects and the fat one should have a short run up to the gray or black splitter where you push it in and turn to release it----a few versions require a special tool to remove it at the actual flyback.

When all (mark every plug) are free the board lifts up from front and comes out---common mistakes include not taking all the small screws out.

Lastly it is usually easier to repair than replace this board--you getting any error or blink code from the power light?

Also I have seen a bad convergence chip cause this (should be on same board and stk-392-560) and unsoldering both chips the set will come on----have to be careful there as lots of little surface mounted parts where chips solder in on bottom of board.

As much information as I can think of---let me know if need more help.

Regards, SD TECH

Posted on Dec 03, 2012

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SOURCE: i need the part number for a replacement lamp for the kp57hw40

I'm sorry to report that the red CRT for this set is no longer available.

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laisecorp,

You have a problem on the "D" board. If you understand electronics and soldering you should check transistor Q8014 and Q8013 for shorts, leakage or bad solder connections. If you find any problems replace the transistors and also check/replace R8051 and IC8005.

If you are not good at soldering or fixing electronics go to http://www.encompass.com and purshase the board, part number A-1065-548-A. The board is $150.00 US plus shipping.

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