Electronics > Repair
Sorensen DLM300-2 need blown part numbers.
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fzabkar:
R denotes a decimal point, so 4.7 ohms.
coromonadalix:
r385  seems toasted ???

look a like symmetry ?

r288 = r321

not sure if r289 is =  r350 or r322  ???

WL3 ??   as the same value as R350   deductions seems right  = 1002 value ? oops loll 2001   be sure to measure it
R-1125F:
I got everything back together and working but with one issue.  Without a load, the output transformer is buzzing.  Without a load, the buzzing get louder as the voltage is increased.  Under load it is quiet.  While is was buzzing I tried to press on the transformer winding and the core but there was no change.  As I said, there is no problem under load.   Could there still be a problem that is causing the transformer to buzz without a load?
coromonadalix:
could be some "normal"  behavior   since some of theses psu can be phase controlled / pwm controlled  etc ... and the x-former run on light load

unless you remove it, and dip it in rosin with some vacuum air out, i would not touch it

i have other brand similar psu's,  and you do hear some supply noises   unless it is to loud ??

was it like this  before the problems ?
R-1125F:
I bought this as not working so I don't know how it worked before.   I guess I should test it to see what the minimum load is needed to quiet down.  It didn't blow up when I put a heavy load on it, so that's a good sign.
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