User manual KUZMA AIR LINE TONEARM

[. . . ] KUZMA AIR LINE AIR BEARING TONEARM Instruction manual 1 KUZMA LTD INSTRUCTION MANUAL FOR AIR LINE tonearm The Air line tonearm is a very precisely engineered piece of equipment. However the construction is robust and requires minimal maintenance for optimal performance. CONTENTS: General Unpacking Basic Setup Compressor Dryers Air connections Setting up the tonearm Adjustment of tracking force Adjustment of tangential geometry Adjustment of VTA Adjustment of Azimuth Adjustment of cueing device Mainentance Problems Page 2 3 4 5 7 7 8 8 9 10 11 11 12 14 2 General description: The tonearm is packed in two boxes. One box contains the compressor with oil and PVC drain bottle and the second box contains the tonearm with all spare parts: allen keys, armbase, geometry protractor and PVC tubing. Oil lubricated electric compressors, which are the quietest on the market supply the air. [. . . ] On the tonearm remove the security wire which has restricted movement of the arm bearing during transport. The tonearm is not balanced, as there is no extra weight on the headshell. When the air bearing is functioning, the counterweight will rotate the tube so that the headshell will go up. To avoid this, mount the cartridge in the headshell with stylus guard on. Pressure on the small pressure guage on the tonearm, should show about 4 bars. By holding the headshell and lifting it, so that the counterweight support is not touching the cueing device rod, gently move the tonearm towards the centre of the platter a few times and also rotate it up and down. If you feel any resistance do not push but check the air supply or pressure. Check wire and air supply loops to ensure that they are not crossing each other. 8 1. Setting up the tonearm: Again check the height of the tonearm. The basic height should be such, that the centre of the shaft (centre of vertical movement), is at the height of an LP on the platter. If there is a big difference, readjust the height of the armbase. If small (1 ­ 2mm), readjust by rotating the VTA knob, after first unlocking the VTA lever. Put the alignment protractor on the platter without a record. Rotate the tonearm so that the base is parallel to and touching the narrow part of the protractor. This will precisely position the tonearm. Fix the tonearm with the Allen key 2. 5mm. Due to its special construction, it is not necessary to overtighten. Cartridge pins are: colours or other symbols: Right (+) red Left (+) white Right ground (-) green Left ground (-) blue If necessary, due to the added weight of the tonearm, re-balance the turntable. Use a spirit level to adjust horizontality of the turntable platter. If this is not possible readjust the turntable support . Do note that spirit levels are not completely accurate. The turntable should be horizontal, otherwise the tonearm will slide in one direction more than in another. Mounting the cartridge With allen screws 2. 5mm, fix the cartridge onto the headshell. [. . . ] Then gently pull off the whole asssembly(tube with blue bearing). Be careful as the wires are short, and put the assembly down on the platter. The wires can be pulled out from the rear of the tube a little with gentle force and can be pushed back if the wire loop is too big. Using appropriate cloth supplied , which does not leave small particles, soak with 7595% isopropyl alcohol (not acetone or any other dillutants) and wipe the shaft clean. 13 Spread cloth over the platter under the blue bearing and from bottle, squeeze alcohol on to the inside of the bearing, which will then drain on to the cloth. [. . . ]