2.3 continued Centre the subchassis in the plinth and remove the spring nut, lower spring seat and spring. Check that the upper spring seat is correctly located in the upper part of the subchassis before reinserting the spring in its correct alignment and compressing it to fit the lower spring seat and nut. The springs may be twisted in this way either side of the painted marks to achieve the optimum centering of the arm board in its cut-out when the subchassis is affected by unusually heavy arms, or thick arm cables. The spring which will normally have the most effect upon this is the one at the front of the plinth. Having completed the assembly under the turntable, replace the base board and insert the feet. 2.4 The bearing is primed with specially chosen oil at the factory, and accordingly once the subchassis has been fitted to the bearing it should not be removed if at all possible. Due to close machining tolerances the sub-platter may take some time to drop fully into the bearing. This may be aided by placing the outer platter on the sub-platter and spinning it, but do not try to force it down. Some oil may be inadvertently lost if the sub-platter is removed at any time - further supplies are available from the manufacturers. 2.5 After levelling the plinth the levelling of the subchassis assembly can be carried out using the three socket-headed bolts mounted in the top of the plinth. The height of the bottom of the outer platter above the top surface of the plinth should be 5 mm and the top surface of the arm board should be level with the outer wooden rim of the plinth as shown in she diagram. 2.6 The motor supply voltage is normally set to 220/240 volts AC (110 volts AC, 60 Hz in USA and Canada). This may be altered if required by removing the four M4 bolts holding the motor plate, and lifting the motor assembly clear of the plinth to gain access to the motor supply circuit. Move the switch on the circuit board to the position which shows the correct voltage for your area. Replace the motor assembly and tighten the fixing bolts fully. Replacement motor pulleys for 50 Hz and 60 Hz supply frequencies are available from the manufacturer. 2.7 The belt should run on the crown of the 33 1/3 r.p.m. pulley without fouling the pulley flanges in normal operation. This can be checked by placing the outer platter upside down on the sub-platter and switching on the motor to view the action of the belt. The height and angle of the motor pulley is factory set and should not require adjustment under normal usage. If however the belt is not running true then the four M4 screws holding the motor plate should be loosened, and the two grub screws at the front of the plate may be adjusted using a 3 mm Allen key. Adjustment should be carried out with the platter running at 33 1/3 r.p.m. and, after setting the grub screws, the M4 fixing belts should be tightened fully.
