Mechanical Adjustment - Akai MX-550 Service Manual

IV. MECHANICAL ADJUSTMENT
4-1.ADJUSTMENT OF THE PB HEAD
AZIMUTH ALIGNMENT (TAPE 1)
FWD AZIMUTH REV AZIMUTH
ALIGNMENT ALIGNMENT
(A)SCREW SCREW
fig.4-1
1) Connect an AC milli-voltmeter to the TEST POINT 1L
and 1R (refer to the illustration on page 24) and con-
nect an oscilloscope's input CH-1 and CH-2 to the
output of the AC milli-voltmeters.
2) Play back the 10 kHz (-15 dB), HEAD AZIMUTH ALIGN-
MENT TEST TAPE (TF-106CH) then adjust the PB
HEAD AZIMUTH ALIGNMENT ® (FWD PLAY) and ©
(REV PLAY) SCREW respectively so that the reading
on the AC mill-voltmeters are at maximum and wave-
forms on the oscilloscope are in the same phase, in
both FWD and REV directions.
4-2. ADJUSTMENT OF THE REC/PB HEAD
AZIMUTH ALIGNMENT (TAPE I)
1) Connect an AC milli-voltmeter to the TEST POINT 1L
and 1R (refer to the illustration on page 24) and con-
nect the oscilloscope's input CH-1 and CH-2 to the
output of the AC milli-voltmeters.
2) Play back the 10 kHz (-15dB), HEAD AZIMUTH ALIGN-
MENT TEST TAPE (TF-106CH) then adjust the REC/
PB HEAD AZIMUTH ALIGNMENT @ (FWD PLAY) and
(REV PLAY) SCREW respectively so that the read-
ing on the AC milli-voltmeters are at maximum and
waveforms on the oscilloscope are in the same phase
in both FWD and REV directions.
FWD AZIMUTH REV AZIMUTH
ALIGNMENT ALIGNMENT
@SCREW (®) SCREW
Fig.4-2
SERVICE MANUAL
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