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B. ADJUSTMENT OF THE A/C HEAD ASS'Y (TILT ADJUSTMENT)
a. Play back a T-120 Tape and check the running condition of the TAPE at the lower flanges of the T GUIDE POST ASS'Y ¤æin Fig. 5-1. b. Adjust the A/C HEAD TILT SCREW untill the TAPE runs stable as shown in Fig. 5-2
TURN THE A/C HEAD TILT SCREW TO THE DIRECTION OF CW
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TURN THE A/C HEAD TILT SCREW TO THE DIRECTION OF CCW
Fig. 5-2 A/C HEAD ASS�Y ADJUSTMENT (TILT ADJUSTMENT)
C. ADJUSTMENT OF THE AUDIO AZIMUTH (See Fig.5-3)
a. Play back the ALIGNMENT CASSETTE TAPE (NTSC: DN2 (SP 7KHz), PAL: DP2 (SP 6KHz)) , , b. Observe audio signals on an OSCILLOSCOPE. c. Turn the A/C HEAD AZIMUTH SCREW to obtain the maximum audio output signal (-9~-3dBm).
Fig. 5-3 A/C HEAD ASS�Y
D. THE HEIGHT ADJUSTMENT OF A/C HEAD
a. Play back a T-120 TAPE. b. Make sure that the gap is 0.25mm between the lower end of TAPE and that of A/C HEAD. c. When the gap is longer than 0.25mm, turn the A/C HEAD HEIGHT ADJUST NUT counter-clockwise. When the gap is shorter than 0.25mm, turn it clockwise. Repeat this procedure untill 0.25mm is obtained.
GAP
Fig. 5-4 A/C HEAD ASS�Y ADJUSTMENT (HEIGHT ADJUSTMENT)
