Replacement Power for a 5.1 Speaker system

jts1957 · Joined: 24 Nov 2008 Posts: 2476 Location: Far, Far Away

Is it just my eyes, or shadows or photo? Over by three-ganged pot. R23 and next one to right "look" discolored?

DeathlyKnight · Joined: 19 Jan 2009 Posts: 6

Nope its a shodow, there is no dis-colouring on the board except for around the caps to the left of the "char-coaled" part

jts1957 · Joined: 24 Nov 2008 Posts: 2476 Location: Far, Far Away

Do you have meter to measure across filter caps? (The largest one for the single supply and the two 3300ufd for the +/- supplies).

DeathlyKnight · Joined: 19 Jan 2009 Posts: 6

yes i do and the resistance between on caps increase the longer i test it so they are obviously working and not shorting out anywhere

LJ · Joined: 09 Dec 2008 Posts: 47 Location: Earth

Maybe the problem is at transformer primary winding, try the board with another transformer to make sure if the board is ok.
BTW, for me, when i see the picture of your transformer, looks like a vcd player transformer made in china ( just joking )
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