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General| Brand | Akai |
|---|---|
| Model | M-9 |
| Category | Recording Equipment |
| Language | English |
Methods for measuring tape speed deviation using pre-recorded tape or timing tape.
Procedure for measuring wow and flutter using a pre-recorded tape.
Method to measure signal-to-noise ratio by comparing output levels.
Procedure for measuring total harmonic distortion with specific test setup.
Method to measure power output using a standard recorder and V.T.V.M.
Measuring cross talk between tape tracks using specific recording and playback methods.
Procedure to measure frequency response using an audio oscillator and V.T.V.M.
Step-by-step guide for dismantling the tape transport mechanism.
Step-by-step guide for dismantling the amplifier units.
Explanation of how the fast-forward mode operates, involving cams and levers.
Explanation of how the rewind mode operates, involving cams and levers.
Description of how the stop control mechanism functions to halt tape movement.
Explanation of the capstan drive system and its rotation speeds.
How the pinch wheel transports the tape at rated speed.
Operation of the record/playback knob and tape movement mechanisms.
Details on the automatic stop mechanism and its operation.
Explanation of how the sound-on-sound recording feature works.
How to adjust pinch wheel pressure for optimal tape speed.
Procedure for aligning and setting pressure for the take-up idler wheel.
How to align and set pressure for the rewind idler wheel.
Procedure to adjust the intermediate wheel's load spring pressure.
Adjusting friction for the take-up reel shaft assembly.
Adjusting friction for the supply reel shaft assembly.
Procedures for azimuth, bias head angle, and clearance adjustments.
Procedure to adjust recording bias frequency using an oscilloscope.
Method for adjusting recording bias voltage with a V.T.V.M.
Procedures for adjusting line output levels during playback and recording.
Adjusting DC collector current for power transistors without input signal.
Guidelines for lubricating motor, flywheel, and idler wheels.
Instructions for cleaning tape heads, rollers, and other components.
Exploded view of the front panel components with labels.
Exploded view of the main case components with labels.
Exploded view of the Amplifier-1 unit components.
Exploded view of the Amplifier-2 unit components.
Exploded view of the Switch Block-1 components.
Exploded view of the Switch Block-2 components.
Exploded view of the Pre-Amplifier Card components.
Exploded view of the Main Amplifier Card components.
Exploded view of the Oscillator Card components.
Exploded view of the Oscillator Card block components.
Exploded view of the Power Block components.
Troubleshooting guide for playback issues like no sound or distortion.
Troubleshooting steps for when the unit fails to rewind tape.
Steps to troubleshoot tape not advancing in play mode when capstan is stopped.
Troubleshooting for when the take-up reel doesn't wind tape during capstan movement.
Steps to resolve loud motor vibration issues.
Troubleshooting for squeaking noises during tape playback.
Diagnosing and fixing issues with the automatic stop mechanism.
Troubleshooting for a cycle change switch that fails to move.
Guide for troubleshooting various recording issues.
Steps to resolve wow, flutter, and irregular tape movement.
Troubleshooting guide for when the unit fails to engage fast forward.
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