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Nakamichi CR-3 Service Manual

Nakamichi CR-3
39 pages
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Nakamichi
NAKA-00120
Service
Manual
Nakamichi
CR-3
CR-3A
CR-3E
CR-30
Discrete
Head
Cassette
Deck

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Nakamichi CR-3 Specifications

General IconGeneral
MotorDC Servo Motor
Track System4-Track, 2-Channel Stereo
Total Harmonic Distortion0.8%
InputLine In
OutputLine Out
Heads3
Tape TypeMetal
Frequency Response20 Hz - 20 kHz
Noise ReductionDolby B, Dolby C
TypeStereo Cassette Deck

Summary

GENERAL

Voltage Selector

Selects operating voltage (110/127/220/240V) on the rear panel.

MECHANICAL ADJUSTMENTS

Record/Playback Head Tilt Adjustment

Adjusting the tilt of record and playback heads.

Head Base Stroke Check

Verifying the stroke travel of the head base.

Erase Head Stroke & Tape Guide Height

Adjusting erase head stroke and tape guide height.

Erase Head Height & Tilt

Adjusting erase head height and tilt for optimal performance.

Playback/Record Head Height & Azimuth

Adjusting playback and record head height and azimuth alignment.

ELECTRICAL ADJUSTMENTS

Tape Speed Adjustment

Adjusting tape speed using frequency counter and volume control.

Playback Head Track Alignment

Aligning the playback head for optimal track contact.

Playback Head Azimuth Alignment

Adjusting playback head azimuth for maximum output.

Playback Frequency Response Adjustment

Adjusting playback frequency response characteristics.

Bias Oscillation & Erase Current Adjustment

Adjusting bias oscillation frequency and erase current.

Record Head Height Adjustment

Adjusting the height of the record head.

Record Head Azimuth Alignment

Aligning the record head azimuth.

Record Level Calibration & Bias Current

Calibrating record level and bias current.

Overall Frequency Response Adjustment

Adjusting the overall record/playback frequency response.

SCHEMATIC DIAGRAM

Schematic Diagram - Power Supply, Control, Main

Detailed schematic diagrams for various PCB assemblies.

BLOCK DIAGRAMS

TIMING CHARTS AND EQ. AMP. FREQUENCY RESPONSE

Eq. Amp. Frequency Response

Frequency response graphs for playback and record equalization.

SPECIFICATIONS

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