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Detailed specifications and characteristics for both GX-4000D and GX-4000DB models.
Identification and function of all front and rear panel controls and indicators.
Procedures for adjusting key mechanical components like pinch rollers, belts, and flywheels.
Steps for aligning and adjusting the tape heads for optimal playback and recording performance.
Calibration procedures for the amplifier circuits to ensure correct audio output and performance.
List of essential spare parts recommended for stocking to facilitate repairs.
Illustrated breakdown and parts list for the head base assembly.
Illustrated breakdown and parts list for the motor block assembly.
Comprehensive illustration of the main mechanical assembly with numbered parts.
List and illustrations of various printed circuit boards used in the unit.
Detailed component layout for the amplifier P.C. board of the GX-4000D model.
Detailed component layout for the amplifier P.C. board of the GX-4000DB model.
Detailed component layout for the power supply P.C. boards for various models.
Illustrated breakdown of the combined power and amplifier assembly.
Illustration of the complete unit's final assembly with major component blocks.
Cross-reference list for substituting semiconductor components.
Complete circuit diagram for the GX-4000D model, detailing electronic components and connections.
Complete circuit diagram for the GX-4000DB model, detailing electronic components and connections.
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