I received this machine with the above symptoms in my shop a few days ago, I opened the machine and went straight to the audio amplifier which from my experience is the major cause of this error.
The transistor was labelled Q407(HY4C), from the data sheet I noted the transistor was a PNP, getting it was not easy and therefore I decided to use an ordinary transistor A1015.
After replacing the transistor, I powered the machine and the s-protect was gone, i did intense testing and noted the new transistor was getting too hot and therefore decided to use transistor B892 which has better specs.
After
replacing it with a transistor B892, I tested the machine for thirty minutes
and the transistor was running cool.
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Congrats and thanks for sharing. Come to think of it, I have trouble dealing with smd components and they have denied me successful repair on many occasions. Like right now I have subwoofer am working on and it appears power ic problem and when I try to Google it's part number I get no match. Thinking of putting universal power module. By the way I need wearable lens with light to see small smd components. Any idea how to get it?
ReplyDeleteConnect me on my phone we sort all these issues my friend Takisi, you have my number as my former student.
DeleteRegards Humphrey
Noted sir.
ReplyDeleteCongrats and thanks for sharing. Come to think of it, I have trouble dealing with DVD and Television so, pls can i have your whatsapp number?
ReplyDelete