Technics SL-J2 User Manual

How to remove the tonearm
. Remove the dust cover. (Refer to ‘‘How to remove the
dust cover.’’)
_ Remove the shield cover setscrew (Fig. 13 : @) and
shield cover.
. Unsolder the 5 lead wires from Tonearm.
. Turn the worm gear by finger to move the tonearm
center inward.
_
Remove
the
tonearm
setscrew.
(Fig.
14:
@
)
.
Remove
the
guide
rail
clamper,
and
pull
out
the
guide
rail,
the
remove
the
tonearm
in the
direction
of
the
arrow A).
How to remove the offset angle detection circuit
board
. Remove the dust cover. (Refer to ‘‘How to remove the
dust cover.’’)
. Remove the indicator cover setscrew (Fig. 14: @ ) and
the indicator cover in the direction of the arrow ®) .
(Fig. 14)
. Remove the offset angle detection circuit board adjust-
ment screw (Fig. 14: @ ), then the offset angle detec-
tion circuit board can be removed.
Note: When replacing the offset angle detection circuit
board, be sure to adjust the servo gain and offset
voltage.
Shield cover
Phono output
circuit board
Tonearm
Fig. 13
m
MEASUREMENTS
AND
ADJUSTMENT
hwWNH = @
Equipment used and condition of the set
. Oscilloscope
. DC voltmeter
. Record (SFTROO7) for adjustment
.
Set
the
optical
sensor
sensitivity
selector
to
‘’M’’.
Item
Preparations for adjustment
Adjusting
portion
Adjusting method
Start position
. Open the upper cabinet and put on the
. Turn the power switch on,
record,
Start position
adjusting screw
. Turn the start position adjusting screw.
If it descends between turnes, turn the
side A up.
"Bush the “start switch, (Fig. 15) screw counter clockwise.
. Connect lead wire with clip to 1C301 1. Turn the power switch on,
29-pin and 1-pin of operation circuit VR301 2. Adjust VR301 so that the cycle of output
2
Clock
frequency
board.
(Fig.
16)
waveform
is
1.36msec.
+
0.07msec,
. Connect the oscilloscope to 1C301 8-pin. (Fig. 17)
1. Turn the power switch on.
.
Connect
os
ph
ia
dire
to
10401
VR401
2.
Tonearm
is
on
the
rest
position,
3 Sensor gain 12-pin an ae ai 2 Aer (Fig, 16) (Blank area of the record.)
‘ Put on the record for adjustment wi "9. 3. Adjust VR401 so that the output voitage
Ree ee OP: is 8V + OAV.
ame b fisce
1. Turn the power switch on.
. (Conineet the Gscilloscope to: 10401 2, Keep the F skip switch depressed to move
; 9-pin (+) and 14-pin (—) VR402 poten,
4 Sensor resolution Bisitorithe tecordtee di tench (Fig. 16) (Output is delivered between the turnes.)
vane. i aqlUstm vi '9- 3, Adjust VR402 so that the peak output
. Turn the power switch on.
between tunes is 3V + 0.3V. (Fig. 18)
. Remove the sensor cover.
Oparithe upper cabinet and hold the 2. Press the F skip switch twice and then
f
;
:
press
the
start
switch.
cabinet
switch
with
tape.
f
leti
P
?
Put on the record for adjustment with RAsRy MEP Combis ON Or CHINE Aden ee
5
Stylus
cue-down
:
eida!
au
VR302
the
B
skip
switch
for
the
purpose
of
position p. : (Fig. 16) cueing down as previously mentioned,
.
Close
the
upper
cabinet.
x
Races
eed
ae tes 4. Make sure that descending position is
. Connect the unit it the amplifier. “ "
(Connect the speakers to the speaker a count 1S eae
;
5,
Adjust
VR302
so
that
the
decending
terminals.) me “" ”
position is at count ‘18 ~ 19”.
7
.
Remove
the
dust
cover,
1.T
h
itch
(Refer to ‘DISASSEMBLY . urn the power swite on.
INSTRUCTION”) hie 2. Keep the F skip switch depressed to move
6
ee
offset
.
Open
the
upper
cabinet
and
hold
the
Pete
”
bd
a
hata
angle cabinet switch with tape. ig. . Turn thea pee oe that t : ‘
_ Close the upper cabinet. yah nat matches the V-groove of the
. Put on the record. OPE TE Der
1. Turn the power switch on,
:
cocaue
the
dust
eoven:
2.
oe
switch
depressed
to
move
(Refer to ‘‘DISASSEMBLY VR501 3. Open the upper cabinet
Servo
gain
and
INSTRUCTION”
é
(Servo
gain)
4.
Completely
shift
the
tonearm
to
the
left.
7
.
Open
the
upper
cabinet
and
hold
the
si
offset
voltage
;
Hl
:
Then,
adjust
VR501
so
that
the
voltage
cabinet switch with tape. Screw is 3.6V (Servo gain)
. Connect the DC voltmeter to CN301 (Offset voltage) 6. If she Joltade east 1.8V, adjust screw
5-pin (+) and 2-pin (—). (Fig. 20) [ 2 oe
so that the output voltage is 1.8V.
(Offset voltage) |

Technics SL-J2 Specifications

General

Brand	Technics
Model	SL-J2
Category	Turntable
Language	English