Gemini Sound PT-2400 Owners manual
OPERATIONS MANUAL
BEDIENUNGSHANDBUCH
MANUAL DEL OPERADOR
MANUEL D’INSTRUCTIONS
PT-2400
HIGH-TORQUE DIRECT-DRIVE
PROFESSIONAL TURNTABLE
PROFESSIONELLER PLATTENSPIELER MIT
DREHMOMENTSTARKEM DIREKTANTRIEB
GIRADISCOS PROFESIONAL DE ACCIONAMIENTO DIRECTO Y
DE ALTO PAR MOTOR
PLATINE VINYLE PROFESSIONNELLE HI-TORQUE À
ENTRAÎNEMENT DIRECT PILOTÉE PAR QUARTZ
GIRADISCHI PROFESSIONALE A COMANDO DIRETTO ED A
ALTA COPPIA MOTRICE
MULTI LANGUAGE INSTRUCTIONS:
English.......................................................................................................Page 4
Deutsch.....................................................................................................Page 7
Español.....................................................................................................Page 10
Francais..................................................................................................Page 13
Italiano.....................................................................................................Page 16
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Figure 1
8
11
15
1314
12 19
10
26 25
24
29
20E
20D
9
1
2
20C
20B
20 20A
6
7
20F
23
21
22
5
4
18
3030A
3
17162827
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Figure 2
Figure 3
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Introduction
Congratulations on purchasing a Gemini PT-2400 high-torque direct drive
professional turntable. This state of the art turntable includes the latest
features in modern direct drive turntable technology. Prior to use, we
suggest that you carefully read all the instructions.
Features
• Quartz locked speed
• +/- 10% Pitch control
• Fully electronic braking
• Strobe illuminator
• Soft-touch start/stop switch
• Platter Reverse
• Digital Display
Precautions
1. Read all operating instructions before using this equipment.
2. To reduce the risk of electrical shock, do not open the unit. There
are NO USER REPLACEABLE PARTS INSIDE. Please contact the
Gemini Service Department or your authorized dealer to speak to a
qualified service technician.
In the U.S.A., if you have any problems with this unit, call
1-732-969-9000 for customer service. Do not return
equipment to your dealer.
3. Tone arm bearings are factory set and sealed. Any attempt at adjustment will void the warranty.
4. Be sure that all AC power is OFF while making connections.
5. Cables should be low capacitance, shielded and of proper length. Make
sure that all plugs and jacks are tight and properly connected.
6. Always begin with the audio level faders/volume controls set at
minimum and the speaker volume control(s) set to OFF. Wait 8 to 10
seconds prior to turning up the speaker volume to prevent the transient
“POP” that could result in speaker/crossover damage.
7. DO NOT EXPOSE THIS UNIT TO RAIN OR MOISTURE.
8. DO NOT USE ANY SPRAY CLEANER OR LUBRICANT ON ANY
CONTROLS OR SWITCHES.
Parts Checklist
Turntable unit.................................................................................1
Dust cover hinge............................................................................2
Turntable platter.............................................................................1
45 RPM adapter...............................................................................1
Neoprene mat....................................................................................1
Counter balance.............................................................................1
Dust cover......................................................................................1
Headshell.......................................................................................1
Assembly and Set-Up
NOTE: SEE FIG. 1 (PAGE 1) FOR PART NUMBERS AND
LOCATIONS.
TURNTABLE INSTALLATION:
1. Set the TURNTABLE BASE (1) on a flat, level surface free of vibration.
Try to place the unit as far away from the speakers as possible. Keep
the unit away from direct exposure to the sun, heat, moisture or dirt.
Keep the unit well ventilated. Use the turntable feet to horizontally
stabilize the unit.
2. Make sure that the VOLTAGE SELECTOR (3) switch (located on the
TURNTABLE BASE) is set to the correct voltage. WARNING: If you try
to operate the turntable with the incorrect voltage setting, it can damage
your turntable.
3. After checking to ensure that all packing materials have been removed,
gently place the PLATTER (2) on the center spindle of the TURNTABLE
BASE (1).
4. Put the NEOPRENE MAT (4) on the PLATTER (2).
CARTRIDGE INSTALLATION: (SEE FIG. 2)
Because all cartridges have their own designs, please refer to your
particular cartridge’s instructions to insure proper installation.
1. Connect the lead wires to the cartridge terminals. For your convenience,
the terminals of most cartridges are color coded. Connect each lead
wire to the terminal of the same color.
White (L+).............................................Left Channel +
Blue (L-)...............................................Left Channel -
Red (R+)................................................Right Channel +
Green (R-).............................................Right Channel -
2. Mount the cartridge in the HEADSHELL (5) and tighten it with the
screws included with the cartridge.
ATTENTION STANTON 680 CARTRIDGE USERS
When using a Stanton 680 or similar cartridge, where the body is
grounded to a cartridge terminal, remove the grounding strap from
the cartridge body to the cartridge ground terminal. Failure to do this
may result in excessive hum.
HEADSHELL INSTALLATION:
Insert the HEADSHELL (5) into the front of the tubular TONE ARM (6).
While holding the HEADSHELL firmly in a horizontal position, turn the
LOCKING NUT (7) counter clockwise until the HEADSHELL is locked in
place.
COUNTERWEIGHT INSTALLATION: (SEE FIG. 3)
1. Slide the COUNTERWEIGHT (8) onto the rear of the TONE ARM (6)
with the numbered stylus gauge facing forward.
2. Twist the COUNTERWEIGHT (8) lightly counter clockwise, to screw it
onto the rear of the TONE ARM (6).
ADJUSTING HORIZONTAL ZERO (0) BALANCE AND
STYLUS PRESSURE:
1. Without touching the stylus tip, remove the stylus protector (if your
cartridge has a detachable one).
2. Release the ARM CLAMP (9) and lift the TONE ARM (6) off the ARM
REST (10).
3. Counter clockwise advancement of the COUNTERWEIGHT (8) will
cause the cartridge side of the TONE ARM (6) to be lowered. Clockwise
will cause the opposite. Turn the COUNTERWEIGHT clockwise or
counter clockwise as needed until the TONE ARM is balanced horizon-
tally. You can easily tell this by watching for the point where the TONE
ARM “floats” freely.
4. Place TONE ARM (6) on ARM REST (10) and lock it in place with the
ARM CLAMP (9).
5. With the TONE ARM (6) locked on the ARM REST (10), hold the
COUNTERWEIGHT (8) steady with one hand while rotating the
STYLUS PRESSURE RING (11) until the numeral “0” on the ring aligns
with the center line on the TONE ARM rear shaft. The horizontal zero
(0) balance should be completed.
6. Refloat the TONE ARM to ensure horizontal zero (0) balance. If zero
balance has not been maintained, repeat counterweight steps 3 - 5.
7. After adjusting the horizontal zero (0) balance, turn the balanced
COUNTERWEIGHT (8) counter clockwise until the cartridge
manufacturer’s recommend stylus pressure appears on the STYLUS
PRESSURE RING (11) where it meets the center line of the TONE ARM
(6) rear shaft.
ADJUSTING THE ANTI-SKATING CONTROL:
Set the ANTI-SKATING CONTROL (12) to the same value as the stylus
pressure.
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ADJUSTING TONE ARM HEIGHT:
The tone arm height is adjustable between 0 and 6 mm. A HEIGHT
SCALE (14) (in 0.5 mm increments) is provided to aid in an accurate
setting.
1. Unlock the tone arm by turning the ARM LOCK (15) knob away from the
lock position.
2. Look up the cartridge height on Table A and find its corresponding
height scale reading.
3. Turn the ARM HEIGHT ADJUSTMENT RING (13) until the reference
line on the ring is positioned at the correct scale reading.
4. Lock the tone arm by turning the ARM LOCK (15) knob clockwise until
it reaches the lock position.
TABLE A
CARTRIDGE HEIGHT
(mm)
15
16
17
18
19
20
21
For example, if the height of the cartridge is 18.5 mm, the ARM HEIGHT
ADJUSTMENT RING (13) reference line should be positioned between 3
and 4 on the HEIGHT SCALE (14).
SCALE READING
0
1
2
3
4
5
6
INSTALLING THE DUSTCOVER:
1. Mount the hinges onto the dustcover.
2. Hold the dustcover in position, directly above the turntable, and slide the
hinge bases into the holders mounted on the rear panel.
3. Always raise the dustcover before removal.
4. Avoid opening and closing the dustcover during play. Undesirable
vibration and stylus skipping can result.
CONNECTIONS:
1. Plug the AC power plug into an appropriate outlet.
2. See Table A for proper connection of the output RCA plugs and ground
connector. Make sure that all the plugs are firmly plugged into the
appropriate jacks (phono inputs). To reduce hum, make sure the ground
lug is firmly connected to the ground screw.
TABLE B
OUTPUT CONNECTORS
L (WHITE)
R (RED)
GND (Spade Lug)
MIXER OR
RECEIVER
PHONO L CHANNEL
PHONO R CHANNEL
GND Screw
Operating Instructions
BASIC OPERATION:
1. Place a record on the NEOPRENE MAT (4) which sits on the
PLATTER (2).
2. Select the desired speed by depressing the 33 or 45 SPEED
SELECTOR (18) button. Press both the 33 and 45 SPEED SELECTOR
buttons at the same time for 78 RPM.
3. Turn the POWER (16) switch to the “ON” position, at which point the
strobe illuminator (built into the POWER switch and the speed indicator
(for the selected speed) will illuminate.
4. Remove the stylus protector (if applicable to your cartridge).
5. Release the ARM CLAMP (9) found on the ARM REST (10).
6. Push the START STOP (17) button. The turntable PLATTER (2) will
start to spin.
7. Push the CUE LEVER (19) to the “UP” position.
8. Position the tone arm over the desired position on the record and push
the CUE LEVER to the “DOWN” position. The TONE ARM (6) will
slowly lower onto the record at which time play will begin.
9. When play is over, raise the TONE ARM (6), move it to the ARM REST
(10), and secure it with the ARM CLAMP (9).
10.You now have the option of turning off the power by turning the POWER
(16) switch to the “OFF” position, or stopping the PLATTER (2) by
pushing the START STOP (17) button and engaging the electronic
brake.
INTERRUPTING PLAY:
1. Pushing the CUE LEVER (19) to the “UP” position will cause the TONE
ARM (6) to lift, stopping play.
2. Pushing the CUE LEVER (19) to the “DOWN” position will cause the
TONE ARM (6) to slowly lower onto the record at the point where play
was interrupted.
PLAYING 45 RPM RECORDS:
1. When playing a 45 RPM record with a large center hole, first place the
45 ADAPTER on the center spindle.
2. Be sure that the 45 SPEED SELECTOR (18) button is pushed and the
45 speed indicator is illuminated.
TARGET LIGHT:
1. Push the TARGET LIGHT SWITCH (21) firmly and the TARGET LIGHT
(22) will raise into position and illuminate the stylus tip.
2. To lower the TARGET LIGHT, push down on it until it locks in the
casing.
3. When not being used, the TARGET LIGHT should be kept in the
lowered position.
ADJUSTING THE PITCH CONTROL:
1. The PT-2400 is equipped with PITCH CONTROL (24) and QUARTZ
LOCK (26). When the QUARTZ LOCK is activated, the QUARTZ LOCK
LED (25) lights GREEN, and the speed will be exactly 33 1/3, 45 or 78
RPM depending on which speed has been selected regardless of the
position of the pitch control. PITCH CONTROL automatically
disengages when QUARTZ LOCK is activated.
2. When the QUARTZ LOCK is off, you can adjust the PITCH CONTROL
(24). When you move PITCH CONTROL (24) off center, the pitch can
vary +/- 10% depending on the position of the PITCH CONTROL.
3. Push the QUARTZ LOCK (26) button to bring the speed back to exactly
33 1/3, 45 or 78 RPM when the PITCH CONTROL (24) is positioned off
center. Disengaging the QUARTZ LOCK will bring the platter speed
back to the original pitch setting.
4. The PLATTER (2) is equipped with a STROBE RPM INDICATOR
STRIP (27) and the POWER (16) switch contains built in STROBE
LIGHTS (28). When the PLATTER is spinning, the STROBE LIGHTS
illuminate the STROBE RPM INDICATOR STRIP. The bottom row of
dots will appear to be stationary when the pitch is -3.3%. The second
row of dots from the bottom will appear to be stationary when the speed
is exactly 33 1/3, 45 or 78 RPM depending on which SPEED
SELECTOR (18) buttons are pushed. The third row of dots from the
bottom will appear to be stationary when the pitch is +3.3%. The top row
of dots will appear to be stationary when the pitch is +7.2%.
PITCH BEND:
1. Pushing the PITCH BEND (23) buttons will temporarily raise or lower
the pitch without changing the slide setting. Releasing the buttons will
return the pitch to the slide setting.
USING THE REVERSE BUTTON:
1. Press the REVERSE (30) button to reverse the rotation of the PLATTER
(2) (the REVERSE LED (30A) will light while in reverse mode). Press
the REVERSE button a second time to return to normal play.
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DIGITAL DISPLAY:
1. The DIGITAL DISPLAY (20) indicates SPEED (20A), PITCH SLIDE
ACTIVATION (20B), PLAY (20C), PAUSE (20D), REVERSE (20E) and
PITCH PERCENTAGE (20F).
ARM-LIFT HEIGHT ADJUSTMENT:
If the pre-adjusted distance that the CUE LEVER (19) raises the stylus off
the record surface is inadequate, it can be adjusted by turning the ARM-
LIFT HEIGHT ADJUSTMENT SCREW (29) while simultaneously pushing
down on the TONE ARM (6). Clockwise rotation of the screw will decrease
the distance and counterclockwise rotation will increase the distance.
Specifications
TURNTABLE SECTION:
Type...................................................Quartz Direct Drive Manual Turntable
Drive Method................................................................................Direct Drive
Motor......................................................................Brushless DC Motor 18V
Platter............................................Aluminum Diecast 13” (332mm) Dia.
Speed...............................................................................33 1/3, 45 or 78 RPM
Starting Torque..............................................................................2.2 kg/cm
Build-up Characteristics...........................0.6 sec. standstill to 33 1/3 RPM
Braking System....................................................................Electronic Brake
Wow and Flutter.....................................................................0.01% WRMS*
* This rating refers to the turntable assembly and platter only and excludes
effects of records, cartridges or tonearms.
Rumble........................................................................78 dB (IEC 98A WTD)
TONEARM SECTION:
Type...........................................................Universal S-Shaped Tubular Arm
Effective Length.............................................................9 1/16” (230.1 mm)
Arm Height Adjust Range...............................................................0 - 6 mm
Overhang............................................................................19/32" (15.2 mm)
Effective Mass..............................................................9 g (Without Cartridge)
Offset Angle...............................................................................................22°
Friction..................................................Less Than 7 mg (Lateral, Vertical)
Tracking Error Angle............Within 2°32' at the outer groove and within
Stylus Pressure Adjust Range..........................................................0 - 5 g
Applicable Cartridge Weight Range.................................................6 - 10 g
Headshell Weight.................................................................................5.6 g
GENERAL:
Power Supply...............................................................115V~60Hz/230V~50Hz
Power Consumption..........................................................................15 Watts
Dimensions......................................................................17 3/4” x 6" x 14"
Weight......................................................................................27 lbs. (12.3 kg)
Specifications are subject to change without notice. The weight and dimensions
shown are approximate.
0°32' at the inner groove of a 30 cm (12") record
450mm x 152mm x 352 mm
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