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In Reply to: RE: DVD pick up head posted by wlee on May 11, 2009 at 12:22:05
Well, first thing you need is an oscilloscope and then you have to find the RF eye testpoint to know where to connect the scope probe to. Then you need to find the appropriate service manual to find out what the proper level of the RF eye waveform is. Also, while you're at it you should probably look into a technical school so that you have some kind of a clue as to what you are actually doing. Sorry to be so blunt but as a former electronic service tech I used to love dealing with customers that liked to tweak adjustment pots. Come to think of it, you guys helped pay off my house. My advice, if it ain't broke don't screw with it.
Follow Ups:
hi Bob, how things are in Alberta? Tks for your advise and sugestion, we I play electronis since young but never could understand laser head yet as my EE and Physics was from 1981 era, though I went to McGill...when they were still researching fiber optic and we had fund programming PDP11.
I got the service manual of Pioneer DV59 that showed thoese scope view, I was just hoping if some one could tell me what the 2 trimmers on the head are for, is one for focusing and the other one for lesar output?? You know the DVD players are so cheap this day, and I am probably buying a new one every 6 months to play with the electronics inside, mainly tuning for the sound. Lots of cheap players could actually produce nicer sound then those sperate transport/DAC on the early to mid 90s after tweaking....
tks a million
William
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