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. [. . . ] When the pressure in the reservoir shows 1-2 bars (20-30 psi), lift the red filters out of the stands and you will hear a slight noise due to the leakage of air. At the bottom of the filters are two black plastic outlets for drainage. Just close them with fingers for about 20 ­ 30 seconds and then quickly remove fingers. This will seal the drainage system and there should be no further leaking noises. The pressure should now build up to about 8 bars (120 psi) when the system will switch off automatically. It will be switched on automatically when the pressure drops to around 6 bars (90 psi). 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. 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 small (1 ­ 2mm), readjust by rotating the VTA knob, after first unlocking the VTA lever. Rotate the tonearm so that the base is parallel to and touching the narrow part of the protractor. 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. 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. The position of the ne edle should be in line with the end of the headshell when viewed from the side. [. . . ] From the red filters, small amounts of water will drain into the supporting stands. Occasionally some noises will be heard due to the automatic drainage system releasing water. If the tonearm is used every day and humidity is high, (over 70%) then monthly checking is recommended. In the compressor manual, working conditions are described for compressors used all day, every day, all the time in industry, where conditions are much more demanding. 12. Dis-assembley of the tonearm Removing the bearing assembly from the shaft. Air bearing assembly and bearing shaft with cueing device Protect the cartridge. [. . . ]