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- 4Point
- Instruction Manual
Kuzma 4Point Instruction Manual
Summary of 4Point
Page 1
1 kuzma 4point tonearm instruction manual serial number: ….. 2008-6.
Page 2: Kuzma Ltd
2 kuzma ltd instruction manual for 4point tonearm the 4point tonearm is a very precisely engineered piece of equipment, however, the construction is robust and requires minimal maintenance for optimal performance. Fig.1 contents: page general description 3 basic setup 5-6 setting up the tonearm 6-8 ...
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3 general description : this differs from other arms by incorporating several unique features. The zero play bearing is configured on 4 points. There is very precise vta adjustment and, despite a longer effective length of 280 mm (11 inches), fits the standard mounting distance of 212mm ( for 9 inch...
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4 fig. 2 technical data: mass: 1650 gr effective length : 280 mm ( 11 inch) mounting distance: 212 mm offset angle: 19.50 degrees distance from spindle to horizontal bearing: 264 mm effective mass: 13 g vta adjustment: yes azimuth adjustment: yes bias adjustment: yes vertical damping: yes horizontal...
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5 1. Unpacking open the box carefully and remove top covers. The tube with vertical bearing points is packed separately (tube assembly) on the top of the box. Please do handle with care and when put aside, ensure that nothing is touching the bearing points. Bear in mind how you will handle the termi...
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6 fig.3 protractor for pivot to spindle distance remove the fixing foam on the horizontal bearing assembly. Check that the bias thread is fixed and gently rotate horizontal bearing assembly from one to another extreme. It is only possible to make approximately ¼ of a turn. It is normal to feel slack...
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7 fig.4 assembling the tube onto the horizontal bearing tower. Cartridge mounting: mount the cartridge with the appropriate set of 2.5 mm screws.When fixing cartridge pins be sure that you do not damage wires under insulation tubes! Headshell removal and fixing: this tonearm has a detachable headshe...
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8 fig.7 removing headshell balancing of the tonearm: fix cartridge pins. Add counterweights to the lower threaded carrier, starting with the longest counterweight, then a plastic ring and another counterweight, until the tonearm is roughly balanced. Be sure to fit the plastic rings that separate cou...
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9 4. Adjustment of tracking force balance the tonearm with the tracking scale, which must be at record height. Rotate the smaller counterweight towards the tube. Rotation for one turn (observe red dots) will change tracking force for approximately 0.1g. If you are unable to obtain the correct tracki...
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10 7. Adjustment of azimuth to make azimuth adjustments, release the two screws locking the mechanism at the centre top of the main tonearm tube, with allen key 2mm. Under the main tube is a tiny rod with a hexagonal screw. Insert the allen key 2 mm into the screw (it may feel loose), rotate it slig...
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11 9. Damping this tone arm has two independent damping systems. The lower trough is for horizontal damping and the second trough on the arm tube assembly is for vertical damping. (fig.1) both troughs are removable. The horizontal holder with paddle is permanently fixed on the horizontal bearing ass...
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12 fig.11 removing vertical trough fig.12 removing horizontal trough fig.13 both troughs removed 10. Cueing device adjustment should you find that in the ‘up’ position the cartridge is too high or too low above the record then the cueing device can be raised or lowered. This can be done simply by us...
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13 11. Maintenance the bearing does not need maintenance. Clean dust from the tonearm with a dry cloth and use a soft cloth and alcohol to remove silicone oil. 12. Transport during transport the tube assembly must be removed from the horizontal bearing assembly. To do this you must remove the vertic...
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14 appendix 1 tangential cartridge geometry adjustment once the cartridge has been mounted, it is necessary to ensure that the cartridge is tangential to the record grooves in order to minimize tracking distortion during playing. As the cartridge moves in an arc across the record, tracking distortio...
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15 to rotate or readjust cartridge: 4. Slightly loosen the screws which attach the cartridge to the headshell. 5. Holding headshell in one hand slightly rotate the body of the cartridge. 6. Recheck alignment at position a and continue adjustment until line described in point 3 is achieved. 7. Alignm...
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16 10. Now rotate protractor and again position stylus at zero point a as described in 5 and 6 above, ensuring that the position of the cartridge in the slots alongside is not changed but only rotated for alignment of the cantilever in zero point a. (fig.17) fig.17 rotation at a 11. Recheck alignmen...
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17 appendix 2 fine azimuth adjustment this can be done using an oscilloscope and a test record or by using good records in a good system and listening to the sound. Cartridges with fine profiles (vdh, microline etc.) are more sensitive to this adjustment. On the other hand cheaper cartridges are not...
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18 appendix 3 fine bias adjustment 1. Set bias and tracking force as previously described and listen to mistracking on highly modulated tracking bands on test record. On higher modulated bands mistracking can be heard as impure tones and there will be more overtones. (see instructions on test record...
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19 cartridge protractor ( not in correct scale) tonearm mounting protractor a x y s b x y.