Need a little help.
23 Jan 2006 19:24:18 -0800
Anyone can pin out a transformer for a sony str-de435. Got one with no
AC output. Any help or a copy of the pdf manual would be appricated.
I agree with Arny. The cost of a new transformer is very high, it's
usually not worth the trouble to replace them.
From your description, it seems like the primary is open. You can
easily confirm this with an Ohmmeter.
Most similar transformers have a thermal link or fuse inside to help
prevent fires. These links are often the cause of open primaries. You
may be able to find and repair the link but there are two
First, the link has been installed for safety. If you want to assume
the risk, repairing the link may be possible.
Second, the link may have opened because the transformer overheated.
This could be caused by driving the unit too hard for an extended
period, poor ventilation, or a shorted output stage or power supply. If
any of these are true, the new transformer will eventually fail also.
Usually, one can figure the specs for a power transformer for a receiver by
looking at the power output, filter cap voltage specs, etc. There are
proabably going to be a number of secondary windings.
Usually the transformer is so complex that it would be hard to find one that
is similar enough and fit inside well enough, eaxct for an exact replacement
Given the low replacement cost of the receiver, you'll probably pay at least
half the price of a new receiver for Sonty's exact replacement transformer.