Do you have a question about the Dual 704 and is the answer not in the manual?
Variation in overall speed as per DIN 45507.
Unweighted and weighted signal-to-noise ratios.
Effective tonearm length, tracking error, and bearing friction.
Vertical tracking force adjustment range and method.
Information on pick-up cartridge mounting and weight.
Physical dimensions and cutout requirements for installation.
Shows transistor connections from the side.
Details voltages measured with respect to tensions.
Explains the slow-running, no-commutator DC motor system.
Describes how rotational speed is regulated.
Steps for removing motor electronics and power cable.
Procedure for replacing the motor unit.
How to set the nominal speeds for operation.
Vertical and horizontal bearing friction values.
How to adjust tracking force using the tonearm.
Steps to remove tonearm assembly and bearing frame.
Procedure for replacing the spring housing.
Adjusting tonearm suspension for optimal performance.
Key points for adjusting vertical tonearm control.
How to adjust the anti-skating force.
Points for adjusting tonearm set-down.
Steps to replace the cue control plate.
Key adjustments for starting and shut-off functions.
Adjusting contact springs for the muting switch.
Defect: Stylus slips out of playing groove.
Common causes and solutions for stylus issues.
Defect: Tonearm lowers too quickly or doesn't set down.
Defect: Tonearm moves with tracking/anti-skating at zero.
Defect: Motor does not switch off on tonearm rest.
Defect: Acoustic feedback issues.
Diagram showing exploded view of parts above the turntable plate.
Diagram showing exploded view of parts under the turntable plate.