1. CD lens baka marumi, linis mo muna.
2. Kapag malinis na at ayaw pa rin bumasa, kailangan na dalhin sa technician
3. Kung medyo malakas loob mo try mo ito on the CD lens:
12.2) Play adjustments
You will see a circuit board, hopefully in your unit it is readily accessible
with component markings. For each servo, there will be 1 or 2 pots to adjust.
Unfortunately for our purposes, some CD players have no adjustments! In this
case about all you can do is confirm that the lens is clean and clean and
lubricate the mechanism.
The adjustments will be labeled something like:
1. Focus - F.G. (focus gain), F.O. (focus offset)
2,3. Tracking - T.G. (tracking gain), T.O. (tracking offset), maybe others.
4. Spindle PLL, PLL adj., Speed, or something like that.
DO NOT TOUCH THE LASER POWER ADJUSTMENT - you can possibly ruin the laser
if you turn it up too high. Sometimes, just turning it with power applied
can destroy the laser diode due to a noisy potentiometer. This adjustment
can only be made properly with the service manual. It may require an optical
power meter to set laser output. Very often the adjustment is on the optical
pickup itself so it should be easy to avoid. Sometimes it is on the main PCB.
The laser optical power output is feedback controlled and unlikely to change
unless the laser is defective - in which case adjustments will have little
effect anyway. If you run out of options, see the section: "Laser power adjustment" - last.
DO NOT JUST GO AND TWEAK WILDLY. You will never be able to get back
to a point where the disc will even be recognized (without test equipment
and probably a service manual).
First, somehow mark the EXACT positions of each control. Some of these
may require quite precise setting - a 1/16 of a turn could be critical,
especially for the offset adjustments.
Sometimes, there will be marked test points, but even then the exact procedure
is probably model dependent.
