Technics SL-6 - Page 9

e Equipment used and condition of the set
1.
Oscilloscope
(two
channels)
4.
Connector
for
adjustment.
2.
DC
voltmeter.
5.
Remove
the
bottom
board
and
remove
the
cover.
(Fig.
29)
3.
Record
(SFTROO7)
for
adjustment.
6.
Set
the
optical
sensor
sensitivity
selector
to
“’M”’.
Adjusting
portion
Preparations
for
adjustment
Adjusting
method
1.
Turn
the
descending
position
adjusting
screw,
If
it
descends
between
tunes,
turn
the
screw
clockwise.
If
it
descends
outside
the
disc,
turn
the
screw counterclockwise.
Descending
position
adjusting
screw.
(Fig. 26)
1. Open the upper cabinet and put on the test
record,
2. Turn the power switch on.
. Push the ‘‘Start’’ switch.
Start position
. Connect Q1 emitter to 1C301 14-pin.
(Fig. 27)
2. Connect the oscilloscope to IC301
13-pin.
1. Turn the power switch on.
2.
Adjust
VR301
so
that
the
cycle
of
output
waveform is 40s + 2us. (Fig. 28)
VR301
Clock
frequency
(Fig.
27)
. Remove the cover and insert the
connector for adjustment into terminal
CN901. (Fig. 29)
1.
Turn
the
power
switch
on
and
move
the
.
‘
?
VR901
tonearm
to
the
blank
area
of
the
record.
Sarieor
gear
=
Pannegt
the
oscilloscope
to
6-pin
(+)
(Fig.
26)
2.
Adjust
VR901
so
that
the
output
voltage
attNaee
is
4V
+
0.4V.
. Play side A of the test record.
. Remove the cover and insert the
connector for adjustment into terminal
CN901. (Fig. 29)
2. Connect the oscilloscope to 7-pin (+)
and 1-pin (—).
3. Play side A of the test record.
. Turn the power switch on.
2.
Push
the
program
key
to
let
it
search
VR902
the
tonearm.
(Output
is
delivered
(Fig. 26) between the tunes.)
3.
Adjust
VR902
so
that
the
peak
output
between
tunes
is
2.7V
+
0.27V.
(Fig.
30)
Sensor
resolution
4. Turn the power switch on.
1.
Remove
the
cover
and
insert
the
2.
Move
the
tonearm
to
a
recorded
(groove)
connector
for
adjustment
into
terminal
part
of
the
record,
and
push
the
cueing
CN901.
(Fig.
29)
switch
for
cueing
down.
2.
Connect
the
unit
to
the
amplifier.
3.
Check
the
time
until
completion
of
(Phono
output)
_cueing
(rise
of
cueing
signal)
after
the
3.
Connect
3-pin
(+)
and
1-pin
(—)
to
the
stylus
touches
the
record
surfase.
;
5
Cueing
timer
channel
(1)
of
two
channel
oscilloscope.
VR903
4,
Adjust
VR903
so
that
the
time
until
4.
Connect
the
speaker
terminal
of
(Fig.
26)
completion
of
cueing
is
0.3
~0.5
sec.
amplifier
to
the
channel
(2)
of
two
(Fig.
31)
channel
oscilloscope.
Note:
Set
the
sweep
time
of
oscilloscope
5.
Connect
the
2-pin
and
1-pin.
to
0.2
sec/cm
or
0.5
ah
ae
;
;
example,
in
the
case
of
0.2
sec/cm
6
al
Ree
aa
d
range,
adjust
it
so
that
the
cueing
Data
ee
or
the:testrecord:
completion
signal
is
delivered
2
scale
(0.4
sec)
later
than
delivery
of
phono
output
signal.
Turn the power switch on.
. Push the program key 2, followed by
start switch.
3. After completion of cueing down, push
N=
1.
Open
the
upper
cabinet
and
hold
the
the
program
key
2
for
the
purpose
of
cabinet
switch
with
tape.
skipping.
2.
Play
side
B
of
the
tesr
record.
Sensor
4.
Make
sure
that
descending
position
is
at
Descending
3.
Close
the
upper
cabinet.
shifting
count
“20
~
21”.
between
tunes
4.
Connect
the
unit
to
the
amplifier.
screw
5.
If
the
descending
position
is
wrong,
open
(Connect
the
speakers
to
the
speaker
(Fig.
32)
the
upper
cabinet
and
turn
the
sensor
terminals.)
shifting
screw.
6.
Close
the
upper
cabinet
and
push
the
program
key
2.
7. Adjust so that the descending position is
at count "20 ~~ 21". Repeat steps 4 ~ 7.
1. Turn the power switch on and push the
start
switch
to
shift
the
tonearm
inward.
4.
Open
the
upper
cabinet
and
hold
the
Adjusting
2
a
offset
cabinet
switch
with
tape.
screw
-
oe
the
upper
cabinet.
hat
the
ar
2.
Close
the
upper
cabinet.
(Fig.
33)
.
Turn
the
adjusting
screw
so
tha
m
center matches the V-groove of the lift
bar.