I need a schematic for a Magnavox Console "Mdl # P-3943"

If you wish to get some details; visit the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/ Circuit diagrams of SMPS section of many popular brand devices are given. Search the site by type in the "brand name" of your device, in the "Search box at the top right of the Homepage" to get gathered related posts.

If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/ Schematic diagrams to many popular brand devices are given. Type in the brand name to your device, in the search box [at the top right] of the display window and the Search will start at once as you type in, and will show you all the related posts. It will make surf easy.

You may download the manual from http://esupport.sony.com/US/p/model-home.pl?mdl=KDL40SL140&template_id=1&region_id=1&tab=manuals#/manualsTab

There's a troubleshooting section beginning on page 41, but no schematics. For that you'll need the service manual, which may not be available to anyone not an authorized repair shop.

Have you tried Sam's Photo Facts? I think it is $35 but have heard that you can find tithe wiring diagrams there.
I have the same model and close to the same serial number... what problems are you having?

Check your recipe against the capacity chart found here: http://www.primasupply.com/images/hobarta200.pdf

You may be overloading the unit. Hope this helps.

if it has a spec.# instead of a ml.#it would have to be at least 25-30 yrs. old

the problem in my tv is the sound no have