Akai 1730-SS

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|
SAME WIDTH
y oll
(ABOUT
0.4
mm)
Li
es
7. HEAD ADJUSTMENT
(A) Adjustment of Head Height (See Fig. 2 and 3)
a.
Erase Head (2-Ch)
Adjust the Erase Head Height by turning head
height screws (a) (a’) so that the upper edge of
the tape as it passes the erase head is 0 (—0,
+0.1) mm top edge of the CH-1 erase head core.
Erase Head (4-Ch)
With height control screws (b) (b’), adjust so
that the width of the head protruding from
both sides of the tape is exactly the same
(about 0.4 mm at both top and bottom).
Recording Head
With height control screws (c) (c’), adjust so
that the width between the upper edge of track
1 head core and the upper edge of the tape is
equal to the width between the lower edge of
track 4 head core and the lower edge of the
tape (about 0.5 mm).
Playback Head
With height control screws (d) (d’), adjust so
that the width between the upper edge of track
1 head core and the upper edge of the tape is
0 (-0,+0.1) mm
d’
Fig. 2
SAME
WIDTH
(ABOUT
0.05mm)
Fig. 3
equal to the width between the lower edge of
track 4 head core and th lower edge of the
tape (about 0.05 mm).
(B) Adjustment of Vertical Azimuth of the Head
Adjust the vertical azimuth of each head (Record
and playback) by turning head height screws (¢) (c’)
and (d) (d’) until the tape comes in conplete
contact with each head.
(C) Adjustment of Head Alignment
a.
Playback Head
Playback an Ampex Alignment tape (8,00) Hz)
at 3-3/4 ips and turn alignment control screw
(f) until the output level of both channels
reaches maximum.
Recording Head
At recording position, supply a 8,000 H: sine
wave at a —10dB recording level fron an
Audio Frequency Oscillator to the Line In put
of the 1730-SS, and set the SOURCE/IAPE
Monitor Switch to “TAPE” position.
Then turn alignment control screw unt! the
out-put level of both channels reaches maxinuim.