This unit belongs to my father in law. Rarely used but produced a puff of smoke and is now not functional. Opened it up and 2 large resistors are burned. Replaced these and powered on with DBT. Relay clicks off straght away.
It is going to be the power transistors or other transistors but it is really hard to work on. The componenets are on 3 different very cramped boards.
Any advice?
Will post pics later.
It is going to be the power transistors or other transistors but it is really hard to work on. The componenets are on 3 different very cramped boards.
Any advice?
Will post pics later.
I would check the output transistors.
They often go short if a fault occurs.
Just replacing them might not fix the problem if the original problem is in Vbe multiplier or driver transistors.
They often go short if a fault occurs.
Just replacing them might not fix the problem if the original problem is in Vbe multiplier or driver transistors.
As per your similar thread last year, these low cost units are apparently based on STA328 chip amplifiers. 'Easy enough to identify those when you know the location.....
JBL CS 360 Xcite Help!
Schematics here, though some details may not be correct as I can't verify: Electro help: JBL CS360 Xcite - 3.1 HTS - SCHEMATIC [Circuit Diagram]
JBL CS 360 Xcite Help!
Schematics here, though some details may not be correct as I can't verify: Electro help: JBL CS360 Xcite - 3.1 HTS - SCHEMATIC [Circuit Diagram]
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There are some interesting app notes on this family of amazing all-in-one signal processing/power amplifying chips here: http://www.st.com/content/ccc/resou...df/jcr:content/translations/en.CD00043207.pdf
STA384 here is actually a development board designed for STA328 chipamps.
STA384 here is actually a development board designed for STA328 chipamps.
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