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5-2-(3). HEIGHT ADJUSTMENT OF A/C
HEAD
< When moving the A/C Head up >
1)
Rotate the screw (A) counterclockwise until the wrinkle
appears on the lower edge of tape at P4 Post.
2)
Rotate the screw (B) counterclockwise until the wrinkle
just disappears on the lower edge of tape at P4 Post.
3)
Rotate the screw (C) counterclockwise until the audio
signal is maximized.
< When moving the A/C Head down >
1) Rotate the screw (B) clockwise until the wrinkle appears
on the lower edge of tape at P4 Post.
2) Rotate the screw (A) clockwise until the wrinkle just
disappears on the lower edge of tape at P4 Post.
3) Rotate the screw (C) clockwise until the audio signal is
maximized.
5-2-(4). FINE-ADJUSTMENT OF A/C
HEAD
(1) Connect the oscilloscope to the output of the
Head Amp as shown in Fig.M3.
(2) Playback the Alignment Tape.
(3) Make sure that the condition of the wrinkle at P4 Post. If
the condition of the wrinkle is out of specification, P4 Post
adjustment has to be performed as follows.
Turn the screw (A) counterclockwise until the wrinkle
appears on the lower edge of tape at P4 Post.
Fig.M10
Fig.M11
Turn screw (A) clockwise until the wrinkle disappears on
the lower edge of tape at P4 Post.
(4) Turn the screw (C) until the audio signal is maximized.
NOTE:
Make sure that the audio output does not increase when push
the upper and lower edges of tape around A/C Head.
5-2-(5) ADJUSTMENT OF X-VALUE
(PREADJUSTMENT)
Equipment Required:
Fine Adjustment Gear Driver (VFK0330)
Specification: Less than 15msec.
(1) Connect the oscilloscope to the audio output and the
video output.
Both output signals should be fixed by the external trigger.
(2) Playback the Alignment Tape and set the tracking control
into center fix position.
(3) Adjust A/C Head position by the Fine Adjustment Gear
Driver (VFK0330) to meet the signal fault portion of the
audio output and the video output signals (Less than
15msec.).
(4) After meeting the signal fault portion, audio A/C Head
position by the Fine Adjustment Gear Driver (VFK0330)
until the video envelope is maximized.
28
Fig.M12
Fig.M13
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