Akai 4400D Service Manual

V. HEAD ADJUSTMENTS
Fig, 11
TAPE
ERASE RECORDING
HEAD
Since adjustment of the Heads critically affects tape
recorder performance, it is essential that Heads be
carefully adjusted with precision measuring equip-
ment and suitable recorded tape.
1. HEAD HEIGHT ADJUSTMENT
(See Figs. 11, 12)
1) Erase Head
Adjust height control screws (a), (b) by turning
to left and right so that the upper edge of the
tape is 0.15 mm lower than the upper edge of
the erase head core.
2) Recording Head
Adjust. the screws (c), (d) by turning to left and
tight until the width between the upper edge of
channel 1 head core and upper edge of the tape
is equal.
3) Playback Head
Adjust the screws (i), {g) by turning to left and
right until the width between the upper edge of
channel 1 head core and upper edge of the tape
is equal.
PLAYBACK
HEAD Fig. 12
. HEAD SLANT ADJUSTMENT
(See Figs, 11, 12)
Adjust the screws (Head Height. control screws) by
turning to left and right so that each head (Erase,
Recording and Playback Head) contacts the tape
surface at a right angle.
. HEAD AZIMUTH ALIGNMENT
ADJUSTMENT (See Figs. 11, 12)
1) Playback Head
Playback an Ampex Alignment test tape (8.000 Hz
3-3/4 ips.) al 7-1/2 ips. Adjust screw (h) by
turning to feft and tight until the various line
outputs are maximum.
2) Recording Head
At recording mode, supply a 15,000 Hz sine wave
at a —16 dB recording level from an Audio Fre-
quency Oscillator to the line-input of the 4400,
and set the Monitor switch to “TAPE” position.
Then adjust screw (e) by turning to left and right
until the various Hine outputs are maximum.
4. Repeat adjustments outlined in Items 1—2)
to 3, above 2 or 3 times to obtain optimum
adjusted condition.
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Akai 4400D Specifications

General

Brand	Akai
Model	4400D
Category	Tape Deck
Language	English