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About cleggsan
Expertise
Consumer Electronics of all kinds. Audio, esoteric audio systems and components, video, tv. Digital equipment for consumer use. Ham radio and automotive electronics. Note: I give advice on tv repair based on general consumer electronics engineering experience but I am not engaged in actual repair of sets. MAKE SURE YOU GIVE THE MAKE AND MODEL NUMBER AND AGE OF THE SET.
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Electrical Engineering; recording, broadcasting, design, international standards, tv and radio theory and practice.
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FELLOW of AES (Audio Engineering Society)
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Famous Engineer for Digital Audio
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You are here: Experts > Home/Garden > Home Appliances > TV/VCR/Stereo Troubleshooting > No Power
Expert: cleggsan - 11/9/2009
Question
I have SONY KV-K21MF1 Chassis G3F which was turned off on inspection I found a blown fuse. After replacin a fuse there is power on most parts but no light on front panel.
I have a doubt on stand by circuit but I don't have circuit diagram to trace it out.
Your help in this regard is very much appreciaed
If possible provide me a circuit diagram.
Thanks and best regards
Qasim
Answer
Sorry, that model does not come up with anything on the Sony Australia help site. Are you certain of the model number?
In any event, you said there is power on most parts; what parts do not have power? Seems that is where you want to investigate.
I don't use schematics or service manuals, sorry. I go by experience and common knowledge.
My guess is there is a power supply failure or some section of it that you must investigate and find out what has gone wrong. There could be two sets of rectifiers; one good and one bad, for example.
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