Sony DVP-M35 Operation Manual page 40
Cd/dvd player
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Also See for DVP-M35:
- Service manual (105 pages) ,
- Operation manual (79 pages) ,
- Operating instructions manual (50 pages)
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(2) Tilt offset adjustment
minimizing
jitter
To optimize
RF during DVD playback
(excluding
search), the jitter (JITTER:time:axis
fluctuation
of the RF signal) is measured,
offset is added to the tilt servo loop, and the
jitter is minimized.
As jitter is adjusted at shipment, normally this adjustment
is not required during playback.
However
if the jitter deviates
with time, the adjustment
value may not be optimum
, according
to the disc. In such cases, the jitter is measured
prior to playback,
and if it is
deviated
from the specified
value, adjustments
are started automatically.
i.
The jitter value is measured
by IC806 (CXD1865R)
and the measured
data is sent to
the system controller
IC805 (HD6437034)
to determine
the offset amount. The offset is
voltage-generated
by the PWM output of IC506 (DSP), and input to SSI33P3720
(_P
as the offset voltage (TIOFS).
By performing
the above three types of IC control, the jitter is adjusted
to optimum.
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