Thank you for your inquiry. The most common cause of this is improper balancing (or zeroing) of the tonearm assembly prior to setting the tracking force. As a result, the actual tracking force at the time is much heavier than what the stylus force gauge ring suggests and what the cartridge can handle. This excess tracking force typically causes the Left channel to have no audio or be distorted. It is possible however that the Right channel could be affected in the same manner instead. Excessive down-force causes excessive deflection of the stylus cantilever. This causes misalignment of the tiny magnets (there is one for each channel) attached to the cantilever with respect to their corresponding pole piece which extends from the coil inside the cartridge. Being a magnetic-type cartridge, the alignment of the magnets to their corresponding pole piece is critical. Typically, as soon as we have an end user balance (or float) the tonearm, zero out the stylus force gauge ring, then set the counterweight assembly to the recommended tracking force, proper magnet alignment is restored, the audio is restored and everyone is happy.
Below is a lengthy explanation about how to set the proper balance. Also, I have attached a link to a YouTube video that walks you through the set up for the turntable.http://www.youtube.com/watch?v=YCv7...
The first thing you need to do is to swap the RCA plugs at the stereo amplifier or receiver to see if the problem moves with the swap or if it stays on the same channel. This immediately isolates the problem to either the turntable or the stereo. If the problem moves with the swap, it is the turntable. If it stays on the same channel, it is the stereo. If it is the turntable, next confirm that the counterweight assembly is installed onto the tonearm correctly. That is, as when standing in front of the turntable like you would to operate it, when you look at the counterweight assembly on the rear of the tonearm the black stylus force gauge ring should be facing you. The black ring should be facing the front of the turntable. It is surprising how many people will actually install the counterweight assembly backwards, with the ring on the backside of the weight and facing the rear of the turntable. This makes it impossible to set the tracking force accurately and can result in a very excessive amount of down-force at the stylus/cantilever assembly.
After verifying that the counterweight assembly is installed correctly, rotate the entire counterweight assembly, NOT just the black stylus force gauge ring which can turn independently of the weight, in a clockwise direction (which is to the right) so the numbers on the ring go down in value and stop when the zero on the ring is lined up with the black centerline marked along the top of the tonearm. What is the position of the tonearm when the counterweight is set at zero? Is the arm floating perfectly level in the horizontal plane which puts it parallel to the record and floating about 1/8 of an inch above the tonearm rest, is the cartridge end of the arm angled downward toward the record or still sitting in the tonearm rest, or is the cartridge end of the arm pointing upwards toward the dustcover?
If the cartridge end of the tonearm is angled downward the arm has not been properly balanced and zeroed, resulting in an excessive amount of actual tracking force. The arm needs to be (re)balanced to float perfectly level. Begin this process by rotating the counterweight assembly in the direction needed to achieve a perfectly level arm. Note that rotating the weight in the clockwise direction (to the right) causes the weight to move rearward on the arm which decreases the down-force at the cartridge end of the arm. Likewise, rotating the weight counterclockwise (to the left) causes the weight to move forward on the arm which increases the down-force at the cartridge end of the arm.
After balancing the arm, lock it down to the tonearm rest using the locking clamp on the rest. Next rotate the black stylus force gauge ring (the ring ONLY, not the weight itself – the ring will turn independently of the weight) until the zero lines up with the black centerline marked along the top of the tonearm. Finally, to set the actual tracking force, rotate the entire counterweight assembly counterclockwise (to the left) so the numbers on the ring go up in value and stop when the desired tracking force as indicted by the ring is reached. For the provided AT95E Cartridge (green colored stylus assembly), this is 2.0 grams. The tracking force range for this cartridge is stated as being 1.5 to 2.5 grams with 2.0 grams recommended.