Mechanical Adjustments; Electrical Adjustments - Sony PS-212A Service Manual

SECTION 3
ADJUSTMENTS
3-1. MECHANICAL ADJUSTMENTS
Automatic Return Position Adjustment ,
1.
2)
Reject the tonearm by REJECT lever.
Bring the tonearm to the automatic-return test
groove (inside portion) of the test record
(YFSB-6), and adjust the screw for returning
the tonearm at count 15~17.
Turning direction Automatic return
clockwise late
counterclockwise
early
Tonearm Height Adjustment
A)
i
Bring the tonearm toward the inner of the
record and put the stylus in the last groove
of the record.
Slowly turn the turntable by hand to lift the
tonearm.
Make sure that the clearance between the stylus
tip and the record is 4~ 10mm.
If necessary, adjust the height of the tonearm
by turning the tonearm lifter screw.
After the adjustment, make sure that the tone-
arm smoothly returns to the tonearm rest.
PS-212A
PS-212A
Speed Detecting Head Output Level Adjustment
speed detecting head
Set the head deck as shown.
VTVM
Make sure that the VTVM readingis 10—5OmV 33 rpm
ac. 10—50 mV ac
tonearm
lifter screw If necessary, adjust the position of the head
cross-recess head
screwdriver Bring the tonearm to the desired position on
the record.
Lift the cueing lever and make sure that the
clearance between the stylus tip and the record
is 4~10mm.
If necessary, adjust the height of the tonearm
by turning the adjustment screw. (Turn clock-
wise to raise the tonearm height.)
deck by loosening the adjustment screw.
Note: Make sure that the head does not touch
the turntable.
3-2. ELECTRICAL ADJUSTMENTS
Turntable Speed Adjustment
If correct speed cannot be obtained by adjusting
the PITCH control knob, adjust RV1 or RV2.
1,
Set the PITCH control knob to the mechanical-
mid position.
Set the SPEED selector knob to "33" or "45"
position and adjust RVi or RV2 so that the
stroboscope pattern appears stationary.
RV2
{45 rpm)
RvVi
(33 rpm)