Hi I try to fix Samsung DVD player model HT-DM150.DVD disk no spin.I
checked that there is no beam from optical pick up means that pick up
can not send signal to LSI that it got focus and thats why LSI cannot
send signal to spin disk.This is my own opinion.If Im not right please
correct me.My question is how can I check optical pick up if its good or
not using oscilloscope or multimeter?I checked the power which is goes
to laser diod.The power is present in about 3V but still no beam.Please
help me.Thanks

"Max" wrote in message
...
Hi I try to fix Samsung DVD player model HT-DM150.DVD disk no spin.I
checked that there is no beam from optical pick up means that pick up can
not send signal to LSI that it got focus and thats why LSI cannot send
signal to spin disk.This is my own opinion.If Im not right please correct
me.My question is how can I check optical pick up if its good or not using
oscilloscope or multimeter?I checked the power which is goes to laser
diod.The power is present in about 3V but still no beam.Please help
me.Thanks

Impossible to tell for sure from your post, but a bad laser pickup is the
most common suspect for problems such as yours, and Samsungs have a pretty
bad reputation for this. The only practical way to be certain would be to
try a new pickup or a known good sub mech from a like model. The economics
of the situation work against a repair in situations like this. I would
replace it with a Pioneer model - their pickups seem to last longer on the
average.

Mark Z.