(2) Quartz Lock Adjustment
This adjustment is
necessary only after replacing or re-
pairing
VC4046 (IC1) or
replacing VR4. Prepare a
voltmeter or tester having an
impedance of more than
20 kD,/V . Connect it between Pin 10 and the ground
terminal of ICl and turn VR4 until a
reading of 3
:1: 0.
5 V is obtained.
Slight adjustment errors are
negligible thanks to the
automatic lock-
in type IC. The
adjustment can be cor-
rectly performed with a
tester having an
impedance
1 k - 5 kSt
if an impedance conversion is performed in
some manner, such as using an emitter-
follower circuit.
Tonearm Section
7 -(3)
Headshell Angle
Headshell mounting angle adjustment (See Fig. 8-
If the headshell is not horizontal and the stylus tip is not
perpendicular to the record surface
, loosen the lock
screws as shown in the
illustration and move the head-
shell to adjust the stylus to be at right angles
(90
with
the platter.
Eye-measurement is sufficient.
Be sure to retighten the screws
after the adjustment is
completed.
7-(4) Tonearm 8evator
. Tonearm
elevator height adjustment (See Fig. 9)
The optimum. clearance between the stylus tip and the
record surface is about 6 mm when the tonearm is
sup-
ported by the tonearm elevator. Turning the
adjusting
screws clockwise lowers the
height of the tonearm
elevator and counterclockwise increases it.
Fig.
Fig.
Fig.
Fig. 9
QL-
No. 2464
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