Philips N 7300 Service Manual

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Service Manual
TABLE OF CONTENTS
Page
I. Technical specifications 2
H. Controls 2
lft. Dismantling 4
IV. Adjustments arid checks 5
V. __ Lubricating instructions 8
Vl. Exploded views 9
Vil. Parts list of mechanical parts 10
VIM. Circuit diagrams 13
IX. Wiring diagrams 18
X. PCB drawings 21
XI. Parts list of electrical parts 23
Safety regulations require that the set be restored to its original
condition and that parts which are identical with those specified,
be used.
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Philips N 7300 Specifications

General

Brand	Philips
Model	N 7300
Category	Measuring Instruments
Language	English

Summary

Technical Specifications

Key Technical Specifications

Details on mains voltage, frequency, power, tracks, reel diameter, and tape speeds.

Playback Performance Metrics

Specifications for playback frequency response, equalization, signal-to-noise ratio, and wow/flutter.

Input/Output and Sensitivity Details

Information on input sensitivities for MIC/LINE and output voltage levels for LINE/PHONES.

Controls

Primary Operational Controls

Description of reel spindles, tape tension, cueing, mains switch, recording/output levels, and speed controls.

Indicators and Input Jacks

Details on recording level meters, peak indicators, and the microphone input jack.

Secondary Controls and Connections

Covers additional controls like speed/track selectors, buttons, and various input/output connectors.

Dismantling

External Component Removal

Step-by-step instructions for removing the backcover, head cover, and ornamental plates.

Adjustments and Checks

General Adjustment Guidelines

Important notes and prerequisites for performing operational adjustments and checks.

Mechanical Adjustments

Procedures for aligning tape guides, tension, brake, reel discs, flywheel, and tape pulling force.

Speed and Erase Head Calibration

Instructions for adjusting tape speed and suppressing erase oscillator signal radiation.

Playback Head and Amplifier Calibration

Steps for adjusting playback head inclination, azimuth, and amplifier output levels.

Recording Head Adjustment

Procedure for aligning the recording head for optimal performance.

Recording Amplifier and Indicator Calibration

Adjusting channel equality, indicator readings, and recording amplifier levels.

Bias and Frequency Response Optimization

Procedure for bias adjustment and checking overall frequency response and distortion.

Lubricating Instructions

Lubricant Specifications

Details on recommended lubricants, part numbers, and their specific applications.