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XR-P740M,
XR-P64()M,
XR-PS4()M
xR-P74(),
XR-P64trJ_, XR-P340
I
Pictup Radial/Tangential Tilt Adjustment (For GD Single)
o Objective
o Symptom when out
of adjustment
To adjust the angle of the pickup relative to the disc so that
down into the disc for the best read out of the RF signals.
Sound broken; some discs can be played but not others.
the laser beams are shone straight
Measurement
Instrument
Connections
Connect the oscilloscope to
TP1, Pinl (RF).
[Settings] 2OmV division
20Ons7ldivision
AC mode
O Player State
o Adjustment Location
o Disc
Test mode, play
Pickup radial tilt adjustment screw
and tangential tilt adjustment
screw
8 cm disc
[Hewever, those with approx. 20
min of audio signal (music).1
direction
Tangential
direction
Tangential direction
lProcedurel
l.PresstheMANUAL/TRACKSEARCHFwD>>.>>!keyorREV[<<.<<
external circumference of the disc.
Press the DOLBY NR key, thePLAY /PAUSE
>/alkey
twice in that order to close the respective servos and put the
player into play mode.
2. First, adjust the radial tilt adjustment screw with the hexagon wrench (GGK1002) 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 the hexagon wrench (GGK1002) so that the eye pattern (the
diamond shape at the center of the RF signal) can be seen the most clearly (Fig. 3).
X The ball-point type hexagonal wrench is used because the disc will get in the way if a normal hexagonal wrench is
used.
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
Disc
F i g . 2
J " o 3
1 - 3 4
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