I tried using Head Cleaner for tape
If noise signal due to crumpled tape or foreign objects is input, it may occur.
How to fix
①For wet type tape, add 6 drops of alcohol and insert the tape. Play 20sec. → Forward 10sec. → Rewind 10sec. Do not press Stop button while doing this. Clean it until audio/sound system works by repeating ‘play, forward, rewind’ for 5 times.
②For dry type tape, insert the tape and Play 20sec. → Forward 10se. → and rewind 10sec. Do not press Stop button while doing this. Play 20sec. → and forward.