1

Topic: Help with electronics (simple )

Greetings, Question about normal computer audio - the unit of +2 columns. In a column (in one) after 5 minutes of operation became there is a rumble strong. Not in a column, to be exact in one channel. Untwisted a box, saw that one transistor was turned off from the heat sink. I fastened it, but the audio a box any more does not work. The supply spark does not burn. A question: I a backlog while assorted something or this transistor was responsible for a supply and could burn down and become the breakage reason? On a picture I outlined pads of this transistor an oval. There what that shading or me seems.

2

Re: Help with electronics (simple )

Hello, a cube, you wrote: on a picture I outlined Pads of this transistor an oval. There what that shading or me seems. Image: p.jpg not the transistor and a chip, most likely TDA 2030. It is the amplifier. It is necessary to replace.

3

Re: Help with electronics (simple )

Question: I a backlog while assorted something or this transistor was responsible for a supply and could burn down and become the breakage reason? Whether check up shorted the heat sink of this  on the heat sink to which it it is fastened (weave a tester dialing program between the heat sink  and which it is fastened by the screw to the big heat sink). You can overwound the screw, and that can there what rejected insulator and Chineses knowing it simply weakened the screw that did not short on the case, well and here came  and all repaired.

4

Re: Help with electronics (simple )

Hello, Shmj, Judging by an amount of outputs, really chip. And on a photo at a row of a standing chip it is visible white - che it looks like an isolation spacer? Perhaps certainly, simply so thermopaste is salved, but is sick .... But anyway at changeover it is necessary to put on thermopaste -8.