On Nov 3, 6:54*am, b wrote:
My dvd-dtt unit recently failed to start up. As I suspected, there was
a bulged 1000uf 35v cap on the psu secondary so I changed it , and the
associated rectifier diode ( a 1N5822) as the pcb looked toasted and I
suspected it might have gone a bit leaky.

As replacement I used an SB340 (http://pdf1.alldatasheet.com/datashe...WTE/SB340.html
) from the spares box. the unit now works but the diode seems to be
running hot - you can keep your finger on it - just - in use. Is this
usual? At least it doesn't seem to be getting red hot....
-B

Absolute maximum current is 3A, at a forward drop of 0.5 V, so max
power dissipation is 1.5W. The typical thermal resistance is 20C/W, so
the max temperature rise should be 30 C. Can you keep your finger on a
55C temp surface?

Any $10 multimeter should be capable of measuring all three parameters.