Filter
Top Products
XR-P740M,
XR-P640M, XR-P34()M
xR-P7 40,
XR-P64{J_, XR-P340
!
Pickup Radlal/Tangential Titt Adjustmont
(For
GD
Multil
a
o
Objective
Symptom
when out
of adjustment
To adjust t}te angle of the
pickup
relative to the disc so that
the laser beams are
shone
down into
the
disc for the best read out of the RF signals.
Sound broken; some discs can be
played
but
not others.
straight
o
Measurement
Instrument
Connections
Connect the oscilloscope
to
TP1, Pinl
(RF).
[Settings]
20mV/division
200ns7ldivision
AC mode
o
Player State
o
Adjustment Location
o
Disc
Test mode,
play
Pickup radial tilt adjustment screw
and tangential tilt adjustment
screw
YEDS-7
lProcedurel
1.PresstheMANUAL/TRACKSEARcHFwD>>.>>!keyorREv|<<.<<
halfway across the disc
(R:35mm).
Press the DOLBY NR key, thePLAY/PAUSE
>/|,key
twice in that order to close the respective servos and
put
the
player
into
play
mode.
2. First, adjust the radid tilt adjustment screw with a Phillips screwdriver so that the eye
pattern
(the
diamond shape at
the
center of the RF signal) can be seen the most clearly.
3. Next, adjust the tangential tilt adjustment screw with a
Phillips
screv/driver so that the eye
pattern
(the
diamond shape
at the center of the RF signal) can be seen the most clearly
(Fig.
3).
4. Adjust the radial tilt adjustment screw and the tangential tilt adjustment screw
again
so that the
eye
pattern
can
be seen
the most clearly. As necessary, adjust the two screws alternately so that the eye
pattern
can be seen the most clearly.
5. When the adjustment is completed, lock
the
radial
and tangential adjustment screw.
Note: Radial and tangential mean
the
directions relative
to the disc shown
in Fig. 2.
Radial direction
Tangential
direction
Disc
Fig.2
d"O
I
1-33