502 - Turntable DUAL - Free user manual and instructions
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| Product Type | Turntable |
| Brand | Dual |
| Model | 502 |
| Drive System | Belt-drive |
| Motor | 4-pole synchronous motor |
| Speeds | 33 ⅓ and 45 rpm |
| Wow & Flutter | < 0.1% (WRMS) |
| Signal-to-Noise Ratio | > 50 dB (DIN B) |
| Platter | Aluminum die-cast, 304 mm diameter |
| Tonearm | S-shaped, gimbal suspension, anti-skate |
| Tracking Force Range | 0 – 3 g |
| Cartridge Included | Ortofon OM or similar (user replaceable) |
| Output Voltage | 2.5 mV (at 1 kHz, 5 cm/s) |
| Power Supply | 220–240 V, 50 Hz |
| Dimensions (W x D x H) | 420 x 360 x 120 mm |
| Weight | Approx. 5 kg |
| Maintenance | Clean stylus with brush; replace belt every 2-3 years |
| Safety | Unplug before cleaning; avoid moisture |
| Spare Parts | Drive belt, stylus, cartridge |
| Repairability | Belt and stylus user-replaceable; tonearm adjustment possible |
Frequently Asked Questions - 502 DUAL
How do I replace the belt on a Dual 502?
First, remove the platter by lifting it straight up. Locate the old belt around the motor pulley and inner platter rim. Carefully slide it off. Stretch the new belt around the motor pulley and then work it onto the inner rim of the platter. Reinstall the platter, ensuring the belt remains seated. Finally, power on and test speeds.
What cartridge can I use with the Dual 502?
The Dual 502 accepts standard half-inch mount cartridges. Common replacements include the Ortofon 2M Red, Audio-Technica AT95E, or Shure M97xE. Ensure tracking force and anti-skate are adjusted according to the cartridge specifications.
How do I adjust the tracking force?
Set the counterweight on the back of the tonearm by rotating it until the tonearm is balanced. Then turn the calibrated dial to the desired tracking force (typically 1.5–2.0 g). Use a stylus force gauge for accuracy.
Why is my turntable playing too fast or slow?
Check the belt condition – a worn or stretched belt can cause speed issues. Also, ensure the motor pulley is clean. If the speed remains inconsistent, the motor may need lubrication or replacement.
How do I clean the stylus?
Use a soft carbon fiber brush or stylus cleaning gel. Gently sweep from back to front of the stylus. Avoid using alcohol or harsh chemicals as they can damage the cantilever.
What is the correct anti-skate setting?
Set the anti-skate dial to the same value as the tracking force. For example, if tracking force is 1.8 g, set anti-skate to 1.8. Fine-tune by observing groove wear or distortion.
Can I use a moving coil cartridge?
The Dual 502 is designed for moving magnet cartridges. Moving coil cartridges usually require a step-up transformer or preamp, which may not be compatible without modification.
How do I change the speed from 33 to 45 rpm?
Lift the platter gently and move the belt to the appropriate groove on the motor pulley. For 33 rpm, use the small pulley; for 45 rpm, use the larger one. Reinstall the platter and verify speed.
Why is there a humming noise from my turntable?
Ensure the turntable is properly grounded. The Dual 502 has a ground wire that should be connected to the preamp or amplifier's ground terminal. Also check for loose connections or nearby electromagnetic interference.
Where can I find spare parts for the Dual 502?
Spare parts like belts, styli, and cartridges are available online from retailers like TurntableNeedles, LP Gear, or eBay. Dual-specific parts may also be found at vintage audio repair shops.
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USER MANUAL 502 DUAL
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Product information
Brand : DUAL
Model : 502
Category : Turntable