Repaired Sony TV KV-1485GE
Last week my brother in law sent
me a Sony TV for repair, he's in the cctv industry. Though I rarely repair TV, the experienced that I gained
from repairing monitor can be apply to repair TV. The complaint was no power, upon checking found quite a number
of defective components in the power circuit. The fuse was blown into pieces, protection resistor 3.3 ohm became
open circuit, resin type ceramic capacitor 222-2kv split into two, 47uf 25v electrolytic capacitor esr has
increased and finally the power ic strs6307 also need to be replace. Using my flyback tester measuring the
primary winding of the power transformer found to have more than 5 bars which mean the winding is good and there
is no secondary diode shorted at the secondary side of the power supply. Optoisolator checked to be ok together
with other components. Replacing the defective parts above solve the no power symptom. From the outlook of the
components that got burnt, it seems that it had been hit by a high surge.
When I call him saying that his
TV already repaired, he added that he got another 29" goldstar TV for me to repair. The complaint is picture
comes out only after couple of minutes. I suspect it could be the tube or the heater circuit. I will let you
know how the outcome is when the TV is repaired. Well it seems that I'm now into TV repairing!
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