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8. Cartridge Replacement
. Unscrew the connector nut to remove the headshell.
2. Remove
the two
long screws
on the headshell which
hold the cartridge.
3. Connect
the
lead wires of the headshell
to the new
cartridge, being careful to match the polarities correctly.
Polarity and wire colors are as follows:
White (+)
....L
Red (+)......
R
Blue (-)
.....
LE
Green(-)
....
RE
4. Attach
the
cartridge
to the
headshell
squarely,
and
gently tighten the screws.
5. Set the cueing
lever to "DOWN",
and then bring the
stylus tip to
the
overhang
indicator
by sliding the
cartridge back and forth.
After the adjustment, fix it firmly.
6. After attaching the cartridge, slide the headshell into
the tonearm with the connector pin fitting in the groove.
Tighten the connector nut.
_
after replacing the cartridge.
Screw
Plastic
washer
?
4
A
Headshell
R
"—
Cartridge pin—___
{ 4
Cartridge body ~~ !
ue
Stylus
_ Groove
Connector pin
Headshell
Connector nut
Fig. 12
Fig. 13
Servomotor Control Section
9-(2) Lock Adjustment
1) With dual beam oscilloscope
1. Connect the motor socket to the circuit board. Connect
the dual
beam
oscilloscope
to
TP-3,
TP-4.
Obtain
a
turntable speed of 45 rpm by setting the speed select
switch to 45 and turn the power switch on, then adjust
the semi-fixed resistor VR802 (100 k{Q2) until the follow-
ing waveforms are obtained.
14.8 ms (20ms)
ee
Fig. 14
Adjust to get a difference of within + 1 msec from TP4.
2. Obtain a turntable speed of 33-1/3 rpm by setting the
speed
select
switch
to 33-1/3, then adjust the semi-
fixed
resistor
VR801
(47kQ)
until
the
difference
between TP-3 and TP-4 is within + 1 msec.
2) With single beam oscilloscope
Ma
imMn
TPS
TP-3
Precaution
if the
measurement As
of TP-3
is required,
connect
the
output
of test equipment
to
TP-3 through
10 kQ
resistor.
Single beam oscilloscope
Within 1 msec
Fig. 15
Fig. 16
Ov
Within
1 msec
=e
Fig. 17
Ov
QL-A2
No, 244
F
;
4
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