13. Connect the low voltage output cable from the control unit to the turntable by inserting the
DIN plug into the socket at the end of the interconnection box mounted at the rear of the
turntable base. NOTE: It is essential that this plug is fully inserted to ensure complete
electrical engagement. It may be found helpful if the turntable platter is removed to
increase the between chassis space available for this task. Ensure that this and any other
leads are dressed clear of the suspension columns. Re-check that the mains voltage
indicated on the back panel of the power supply unit matches your mains voltage. Plug the
power cord into the power supply unit and the mains supply. An on-off switch is situated
on the back of the control unit immediately above the mains socket.
10. OPERATION - Turntable speed adjustment
The Model 20/3 precision turntable is partly run-in before leaving the factory but will further
benefit from the first few weeks of use.
If you should wish to check the speed settings and make your own adjustment, the procedure is
as follows:
1. Complete the Setting Up procedure as detailed in Section 8 above and the arm and
cartridge set-up procedures detailed in the Series V instruction book.
2. Plug the Power Supply in and switch ON, the mains switch is at the rear. The LED marked
POWER will light up.
3. Place the Stroboscopic Disc (1087) on the platter. Use the bands appropriate for your
mains AC frequency. Re-check the drive belt for centrality on the motor pulley.
4. Press button 33 once to start the turntable platter rotating, the LOCK LED blinks
momentarily until the speed stabilises and then becomes constant indicating that the
selected speed is locked.
5. To adjust speeds depress and hold down the 33 and 45 buttons together for 8 to 10 seconds
the 33 LED will flash after this period indicating that the adjustment mode is engaged;
release both buttons. Press and release the 33 button to ‘slow down’ or the 45 button to
‘speed up’. The disc should be viewed in a fluorescent or neon light. The appropriate band
will synchronise and appear stationary when the speed is correct, whilst clockwise and
reverse movement will indicate fast or slow running respectively. This is best observed if
the pick-up arm, with cartridge fitted and in the raised position, is placed directly over the
band being viewed as a reference point. The adjustment method provides a microfine
increment for each press of the button, so a number of depressions will have to be made to
make an appreciable difference to the turntable speed. When the speed adjustment is
completed depress and hold down the 33 and 45 buttons together for 5 seconds, the 33
LED will stop flashing and become constant and your speed setting will be stored in the
system memory for future use.
6. Repeat this process for the 45 and 78 speed ranges if required.
11. OPERATION
1. Place the record spindle washer on the spindle followed by the record and clamp. The latter
should be screwed down clockwise enough to deflect the record flat into firm contact with
the platter. With a fingertip tap the record in three places equally over its surface and with a
little practice it will soon become evident whether or not the record is touching the platter.
If not, some further tightening may be necessary but this is not always the answer however
and sometimes releasing the clamp a little may do more to effect the desired improvement.
11
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