Question about Sony FD Trinitron WEGA KV-32FQ70 32" TV
From what you say about the set working when it's flat on the table, I would say you just have bad solder connections on the board. When the set is flat on the table, the board isn't being flexed as much and the connections are working.
A schematic isn't much help in a case like this. A good light, sharp eyes and probably a magnifying glass is what you need. Tap gently on the board while the set is on and see where the trouble area is. (Obviously you will use something non-metallic...I use a bamboo chopstick.)
When you find the area most sensitive to tapping, examine all the solder connections and resolder any that look questionable. Be especially wary of anything mounted on a heatsink. Sony sets have had many models where connections on power transistors caused many problems.
Good luck, and thanks for using Fixya!
Posted on Oct 08, 2010
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Posted on Jan 02, 2017
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Replacement of the
turntable motor should be carried out by a qualified appliance repair
SAFETY IS PARAMOUNT!
this only if you are competent.
But here is a basic method if you are
mechanically minded and have electrical safety knowledge.
The motor assembly is fixed to the base
of the oven usually with two screws and access is obtained usually by
removing the inspection plate directly beneath the motor. It is
usually a plug in synchronous motor that revolves at a few revs per
minute but the plastic cogs in the motors gear box fail and the motor
assembly must be replaced. They are fairly inexpensive and obtainable
usually from a domestic appliance repair shop.
If you feel confident, disconnect it from the mains power, remove anything in the cavity and turn it upside down if it is a tabletop model, a little more complicated if it is built in!
Remove the inspection plate, sometimes it must be cut out with sharp cutters, and disconnect the motor. Remove the motor and go and get a new one. Fit the new motor and fit the inspection cover back on the base by turning it to fit and using an extra screw fix it then put the microwave back in its position. Plug it back in, with the turntable and plate. Put a cup of water on the plate inside of the oven and heat for 20 seconds to check the plate goes round.
Hope this helps.
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