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SECTION
6
AUDIO
SYSTEM
ALIGNMENT
6-1.
ALIGNMENT SEQUENCE
AUDIO HEAD AZIMUTH ADJUSTMENT
(Section 6-3)
PLAYBACK LEVEL AND FREQUENCY
RESPONSE ADJUSTMENT
(Section 6-4}
BIAS OSCILLATOR
CHECK (Section 6-5)
RECORD
BIAS SETTING
(Section 6-6)
BIAS TRAP ADJUSTMENT (Section 6-7)
RECORD
LEVEL
ADJUSTMENT
(Section 6-8)
Chart 6-1
Audio
system
alignment
sequence
is shown
in
Chart 6-1.
A summary of the alignment procedures
is shown in Chart 6-2.
6-2.
EQUIPMENT
REQUIRED
Audio oscillator:
Audio attenuator:
VTVM:
Shielded cable with earphone plug:
SONY
model
RK-36
SONY
alignment Tape, 5" reel.
6-3.
AUDIO
HEAD AZIMUTH
ADJUSTMENT
Fig. 6-1
Audio output level check
Test Point:
EARPHONE
jack
(audio
output)
Adjust for:
Maximum
output reading on
VT VM
Adjustment:
Head
azimuth
adjustment
screw
Signal source:
SONY
alignment
Tape,
5"
reel.
Procedure:
2.
Connect
VTVM
as shown in Fig. 6-1.
azimuth
adjusting
screw
6-4.
PLAYBACK
LEVEL. AND FREQUENCY
RESPONSE ADJUSTMENT
Test Point:
EARPHONE
jack
(audio
output)
Adjust for:
0.61V (-2dB)
for 1 kHz,
0.43V (-5dB)
for 7kHz
Adjustment:
R814
(1 kHz
level),
R809 (7 kHz level)
Signal Source:
Audio alignment tape
Procedure:
1.
Connect
VTVM
as shown in Fig. 6-1.
3.
Adjust
R814
for
0.61V(-2dB)
reading
on
VTVM.
tape.
5.
Adjust
R809
for
0.43V(-5dB)
reading
on
VTVM.
6-1
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