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NAD 7000 User Manual

NAD 7000
28 pages
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NAD 7000 Specifications

General IconGeneral
Frequency Response20Hz to 20kHz
Total Harmonic Distortion0.03%
Weight10.5 kg
Tuning RangeFM, MW
Damping Factor50
Input Sensitivity2.5mV (MM), 150mV (line)
Output150mV (line)
Speaker Load Impedance4Ω to 16Ω

Summary

Remote Control Transmitter

Main Amplifier Adjustment Points

Main Amplifier Adjustments

Center Voltage Adjustment

Adjust DC millivoltmeter to L and R channel output terminals for 0V ±30mV.

Idle Current Adjustment

Adjust VR403/VR404 for 26-30mV across R471/R472.

Preamplifier Adjustments

Channel Balance Adjustment

Feed 1kHz, 100mV to CD input, adjust R-315 for equal output levels.

FM Alignment Instrumentation Hookup

FM Alignment Procedures

Local Oscillator Frequency

Connect counter to front-end pin 8, adjust C-934 for 100.700MHz.

Tuning Voltage Adjustment

Connect DMM to P-936, adjust L-7 for 20.0V at 108MHz and 3.0V at 88MHz.

Tracking Adjustment

Connect generator to antenna input, adjust for optimal sweep curve on oscilloscope.

IF Adjustments

Adjust I-1 and I-101 for maximum symmetrical curve at 98MHz.

Detector Adjustment

Adjust I-102 Secondary for low THD, L-102 Primary for OV ± 50mV.

Stereo Distortion and Separation

Adjust I-1 for minimum distortion, R-176 for minimum output.

Auto Search Level Adjustment

Adjust R-144 for 0V to 4.4V reading on DMM at 10uV input.

Tuner Adjustment Points and AM Alignments

Stereo Switching Level

Adjust R-148 for stereo light to turn on at 5uV input.

Signal Meter Level

Adjust R-141 for fifth LED to light at 500uV input.

Multiplex Filters

Adjust Z-111/Z-112 for minimum subcarrier, reduce generator output for S/N ratio.

AM Tuning Voltage

Adjust C-137 for 8.1V at 1600kHz, L-102 for 1.0V at 520kHz.

AM Antenna and IF Adjustment

Adjust C-136, I-103/I-104, L-101 for maximum signal.

AM Scan Stop/Signal Meter Level

Adjust R-165 for fifth LED to light at 200uV input.

Main Amplifier PCB Layout

Tuner PCB Layout

Preamplifier PCB Layout

Main Amplifier Wiring Diagram

Pre-Amplifier Wiring Diagram

Tuner and Remote/Display Wiring

NAD-7000 Exploded View

NAD-7000 Exploded Parts Lists

Packing Diagram

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