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General| Track System | 4-track, 2-channel stereo |
|---|---|
| Tape Type | Type I, CrO2, FeCr |
| Type | Cassette Deck |
| Heads | 1 x record/playback, 1 x erase |
| Motor | DC servo controlled |
| Frequency Response | 30Hz to 16kHz (CrO2 tape) |
| Signal to Noise Ratio | 58dB (dolby NR) |
| Dimensions | 416 x 146 x 243mm |
Procedures for adjusting muting switches (Play, Pause, Record) for proper operation.
Instructions for adjusting PAUSE timing and PLAY torque to standard values.
Steps to adjust FF/REW torque by changing spring position for proper operation.
Confirms torque values using a torque cassette for optimal performance.
Adjustments for motor pulley, flywheel thrust, and leaf switch positioning.
Adjusting pinch roller position and pressure for correct tape path.
Procedure for measuring wow and flutter using a test tape and meter.
Adjusting the FF/REW autostop mechanism by modifying stopper screw position.
Setup and step-by-step guide to adjust head azimuth for maximum VTVM reading.
Setup and steps to adjust tape speed using a semi-fixed resistor and counter.
Setup and steps to adjust playback equalizer using R117/R217 for frequency response.
Setup and steps to adjust playback output level using R120/R220 for 580mV output.
Setup and steps to adjust REC control and R151/R251 for proper VU meter deflection.
Setup and steps to adjust L101, L201, L107, L207, L102, L202 for minimum VTVM read.
Setup and steps to adjust L103/L203 for minimum output with MPX filter ON.
Setup and steps to adjust R301/R302 for 58mV VTVM read in recording mode.
Setup and steps to adjust L104/L204, L105/L205, L106/L206 for different tape types.
Setup and steps to adjust R156/R256, R157/R257, R158/R258 for specific VTVM readings.
Setup and steps to record/play back tones, adjusting bias current for frequency response.
Setup and steps to adjust REC LEVEL resistors for recorded signal reproduction at 460mV.
Adjustment procedures for the Dolby encoder circuit, focusing on LAW and GAIN controls.
Adjustment procedures for the Dolby decoder circuit, checking signal levels and NOISE REDUCTION switch.
Setup and steps to play back test tape and read frequency counter for speed indication.
Setup and steps to play back test tape and read wow & flutter meter indication.
Setup and steps to play test tape and read VTVM for playback output level.
Setup and steps to measure S/N ratio by playing test tape and blank tape.
Setup and steps to play test tapes and read output level differences for frequency response.
Setup and steps to record and play back a 1kHz signal, reading VU meter indication.
Setup and steps to record, play back, calibrate meter, and read harmonic distortion.
Setup and steps to record, play back, and measure S/N ratio with and without Dolby.
Setup and steps to record and play back signals, measuring level differences for frequency response.
Setup and steps to record, erase, and measure the level difference at the erased portion.
Setup and steps to record a signal and measure output level difference with input disconnected.
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