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dvd power supply dead

B

bigtom

Jan 1, 1970
0
ORITRON DVD1030 player

theres 3 diodes on the secondary side of the chopper that have shorted.
one SR160 reads 3ohms and the two SR360 diodes are 117ohm and 153ohms
on the diode test.
esr on the caps is good. all other diodes, resistors etc seem ok.

anything i should look at before i replace the diodes and plug it in?
normally i find an open resistor or high esr cap somewhere but it seems
ok.
 
bigtom said:
ORITRON DVD1030 player
theres 3 diodes on the secondary side of the chopper that have shorted.
one SR160 reads 3ohms and the two SR360 diodes are 117ohm and 153ohms
on the diode test.
esr on the caps is good. all other diodes, resistors etc seem ok.

Only the SR160 seems shorted (you don't mention you tested the SR360
diodes both ways). Make sure to check ESR on the secundary caps as well,
if you didn't do that yet.
 
I

Inty

Jan 1, 1970
0
bigtom said:
ORITRON DVD1030 player

What make is it ? Orion ?
theres 3 diodes on the secondary side of the chopper that have shorted.
one SR160 reads 3ohms and the two SR360 diodes are 117ohm and 153ohms
on the diode test.
esr on the caps is good. all other diodes, resistors etc seem ok.

It seems that SR160 is short circuit and the two SR360 are ok. Why didn't
you write the read of K(+) A(-) and A(+) K(-) of all those diodes.
anything i should look at before i replace the diodes and plug it in?
normally i find an open resistor or high esr cap somewhere but it seems
ok.

Change electrolytic caps on the secondary. Use 105° standard caps.

I.
 
B

bigtom

Jan 1, 1970
0
you're both right, i got a new sr160 and tested it, the reading was
around 190 on diode test. i haven't tested a schottky diode before.
so used to seeing 500-900 on the diode test that i thought the sr360's
were partially shorted.
i retested all the caps in the p/s but everything seems fine.
time to watch some movies and see what happens/
 
I

Inty

Jan 1, 1970
0
bigtom said:
you're both right, i got a new sr160 and tested it, the reading was
around 190 on diode test. i haven't tested a schottky diode before.
so used to seeing 500-900 on the diode test that i thought the sr360's
were partially shorted.
i retested all the caps in the p/s but everything seems fine.
time to watch some movies and see what happens/

Good news !

I.
 
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