Marantz 6300 - Page 8

First, to establish a point of reference, the entire arm
assembly (with cartridge installed) must be balanced. If the
cartridge has a removable stylus protector, remove it, (as
you would to play a record). Release the tone arm from the
arm rest.
To adjust the tone arm balance, set the anti-skate weight at
minimum (see Figure 3-2-4) and disable the action of the
anti-skate mechanism by lifting the anti-skate weight as
shown in Figure 3-2-2. The tone arm should be positioned
so that the anti-skate mechanism does not influence the
arm,
To balance the arm, adjust the position of the counter-
weight by rotating it. A numbered stylus pressure scale
plate is located immediately in front of the counterweight.
Rotating the scale plate alone does not change the
counterweight’s position. To change the balance, grasp and
turn the counterweight itself.
Adjust the weight so that the arm is level (parallel to the
turntable surface) with the cartridge suspended in mid air.
Then, without moving the counterweight, set the stylus
pressure scale plate to indicate zero. This establishes a
reference point for setting the tracking force, which is set
after checking the lateral balance.
3. LATERAL BALANCE
The lateral balance adjustment is made while the cartridge
is suspended above the platter surface. The purpose of the
adjustment is to assure that the tone arm is not influenced
by any undesirable lateral (sideways) forces.
The tateral balance weight is located to the left of the
counterweights. It is secured with a small set screw.
Figure 3-2-3. Lateral Balance Weight
4
Place the arm in the same position as for checking vertical
balance. Then, tilt the entire turntable by lifting first the
left side, then the right about two inches. The arm should
not move when the turntable is tilted. If it does, change the
position of the lateral balance weight until no movement of
the arm is observed when the turntable is tilted. The weight
position can be changed by loosening the small set screw on
the weight as shown in Figure 3-2-3.
4. TRACKING FORCE
For the recommended tracking force, refer to the instruc-
tions that accompany the cartridge.
Tracking force, the downward pressure of the stylus against
the record, is produced by simply setting the arm off
balance in the appropriate direction. That is, the counter-
weight is screwed inward (toward the arm pivot) until the
desired downward pressure is achieved.
The stylus pressure scale plate is in frictional contact with
the counterweight, so that they rotate together when the
counterweight is turned. The numbers on the scale plate
correspond to the tracking force measured in grams. So, if
the desired tracking force is tow grams, turn the counter-
weight inward until the stylus pressure scale plate registers
2,
5. ANTI-SKATING ADJUSTMENT
The anti-skating lever is provided to counteract the natural
tendency for the arm to “‘skate’’ toward the center of the
record as it is being played. The more tracking force used,
the more anti-skating force required.
The anti-skating weight is adjustable with notched gradua-
tions that correspond with the tracking force markings on
the stylus pressure scale plate.
Figure 3-2-4. Anti-Skating Mecta nism