Technics SL-J11D User Manual

.--
• MEASUREMENTS AND ADJUSTMENTS
Control position and equipment used
• Size selector .... . .. 30
•
Oscilloscope
START POSITION ADJUSTMENT
1. Put on a 30 cm record.
2.
Turn the power switch "on'', and press the start button.
3. If the stylus drops too much inside or outside the
record, adjust the start position by turning the
adjusting screw .
• Clockwise ................ Stylus drop position is
shifted inside.
• Counterclockwise ..... .. Stylus drop position is
shi
ft ed outside .
CLOCK FREQUENCY ADJUSTMENT
1. Remove the bottom board .
2. Connect IC301 pins 11 , 12, 13, 14 to ground .
Connect IC301 pin 19 to gr ound for more than 15
msec; then, di
sconnect it.
3.
Connect the oscilloscope to IC 301 pin 5 (+) and
ground ( -) .
4.
Turn the powe r sw i tch "on" and adjust VR301 so that
the output waveform cyc le is 45± 1.S µs ec.
SERVO GAIN AND OFFSET VOLTAGE
ADJUSTMENT
1. Remove the dust cover .
2.
Connect DC voltmeter to BT501 pin 2 and pin 4.
3.
Turn the power switch "on" .
4.
Turn the VR501 so that the voltage is 3 .6 V with
tonearm completely turned to the right (offset angle
sensor "open") . (Servo gain adjustment)
5. Return the tonearm to the center and make sure that
the voltage is 1. 8V .
6. If the voltage is not 1.SV. adjust it by turning the offset
voltage adjusting screw . (Offset voltage adjustment)
- 1
9-
• DC electronic voltmeter
• 30 cm record
Start po~
~usting screw
~
Set Oscilloscope
0
IC301
Ground @pin
~
0
+ -
0000
<( <(
I
J
• Oscilloscope setting • Waveform
Offset
VOLT · ·
··· 1V ~ T=45 ± 1. 5µsec.
SWEEP
.... . 10µsec. JUUl
INPUT . .. .. DC
Set DC voltmeter
Lr_::~J !?I
• Tonearm turns to • Tonearm at center
the right
r-f,\
6-y'
angle sensor
Tonearm

Technics SL-J11D Specifications

General

Brand	Technics
Model	SL-J11D
Category	Turntable
Language	English