Hz
FREQUENCY COUNTER
TP9
GND
ELECTRICAL ADJUSTMENT (101LH 131U MODEL)
DECK ADJUSTMENT
1.TAPE SPEED ADJUSTMENT
Requirements
・
Measuring equipments : wow-flutter meter (frequency counter )
Test Tape: TTA-100 (3KHz)
Test point: HP OUT
Adjustment point : Tape speed adjustment point (motor)
1) Connect HP OUT to the Wow - flutter meter.
2) Insert the test tape (TTA-100), play back center of the tape
and adjust the motor until it becomes 3,000Hz
±
30Hz.
2.WOW – FLUTTER CHECK
Requirements
Test tape: TTA-100 (3KHz)
Test point: HP OUT
1) Connect the HP OUT to the Wow – flutter meter.
2) Set the indicator to JIS and the mode to W RMS (WTD) of the Wow – flitter meter.
3) Play back thee center of the test tape (TTA-100) and check that it is below 0.35%.
3.HEAD AZIMUTH ADJUSTMENT
Requirements
・
Measuring equipment: Oscilloscope
Test Tape: TTA-330 (8KHz)
Test point: HP OUT
Adjustment point: Head azimuth screw
1) Connect the HP OUT to the oscilloscope of CH1 and CH2.
2) Set the V mode of the oscilloscope to ADD.
3) Insert the test tape (TTA-330) , play back the center of the tape and adjustment
the head azimuth screw until the waveform of the oscilloscope has reached
the maximum when playing back at 10KHz.
4) After the adjustment, bond lock (1600B) the screw.
4.REC. BIAS FREQUENCY ADJUSTMENT
Measuring equipment: frequency counter
Test point: TP9
1) Connect the TP9 to the frequency counter.
2) Set the recording condition to the main unit.
3) Adjust the L301 until it becomes 85KHz
±
5KHz.
OUTPUT
OSCILLOSCOPE
Lch
Rch
CH1
CH2
Hz
WOW&FLUTTER METER
HP OUT
%
INPUT
Hz
WOW&FLUTTER METER
HP OUT
%
INPUT
-23-
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