User:Jstapko/EngLab/SonyKP-46S25

Projection TV
This project is to reverse engineer a projection TV that Scott and I salvaged from a dumpster on November 11, 2014.

Manufacturer's Label
The manufacturer's label was stuck to the back of the back panel. Scott and I left the back panel in the dumpster because it was big and bulky, and we didn't need it. On November 12, I copied the information from the label. The label said:

"Sony Color Rear Video Projector Model: KP-46S25 AC: 120V 60Hz Ser. 9019336

Product of Sony Electronics INC. Westmoreland Co. PA. 15666

Manufactured November, 1996"

on UL logo (written around edge of circular logo):

"Listed 9C06 Audio/Video Product"

In a separate box on the label:

"Sony Corporation 7-35 Kitashinagawa 6-Chrome, Shinagawa-KU Tokyo, 141 Japan"

(I suspect this is the address of Sony's corporate headquarters)

Online Documentation
On November 12, I did an initial search for manuals and related literature online. I found:\
 * Sony's page on this model of TV Includes operating manual and child safety info, but no service manual.
 * searspartsdirect.com's page on this TV This page includes an assembly diagram of the cabinet, and a few replacement parts.
 * A doityourself.com thread on a picture problem. It seems to have been a bad tuner.
 * A fixya.com page on spontaneously turning off. This includes a checklist of possible problems that might be helpful.
 * A justanswer.com page on powers up, but no picture. User "Dan- Master Tech" says "These sets are known for faulty solder connections and horizontal output/flyback failures."
 * A Service Manual at Electrotanya.com (an excellent resource generally for service manuals and schematics)

Problems

 * One CRT board is missing
 * Boards are very dusty, need to be cleaned before powering up
 * Many other parts missing
 * Cut ends of wires are loose

Next Steps

 * take a picture of the manufacturer's label, or find a copy online (mabye Ebay, Amazon)
 * clean the dust off the board,
 * document the current condition
 * take photos of lables, signs, semiconductor part numbers, etc, before powering up
 * read the service manual and other literature above