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looking for datasheet for Phillips OQ8875 CD Rom laser

B

Bradley1234

Jan 1, 1970
0
HI

Im working on some CDs and trying to test an Acer 12x CD rom, Im now
at the chip that drives the laser and am unable to locate the obsolete
datssheet for the laser driver OQ8875. Does anyone know of the
datasheet? and an app note would help also.

Im looking for the signals and am getting pretty much flat DC, I can
see the laser beam is on, (and use safety precautions) but I want to
see the cd rom data being picked up.

I searched for that datasheet and the place that had it? it was
actually an OQ8868, which is a totally different chip, but they put it
under the 8875 part number on their database. Im waiting for a
response from Phillips, but its obsolete so assistance is much slower.

And any technical notes on how to trouble shoot the laser circuit and
get the data signal? is greatly appreciated

Thanks!
 
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