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Sony M-750V Service Manual page 4

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-750V
1-2.
ELECTRICAL
ADJUSTMENTS
Standard Input Level
es ee ee
Standard Output Level
.
EARPHONE
Record/playback Head Azimuth Adjustment
Setting:
VOLUME
control:
mechanical mid
TAPE
SPEED switch:~
2.4 cm/s
VOR
switch:
OFF
Procedure:
1.
Mode:
playback
test tape.
S-2-4030
VTVM
(3 kHz, -20 dB)
aha
A
pe
2.
Turn the adjustment screw to obtain the maxi-
mum reading on VTVM.
earphone jack
Note: Several peaks may appear, but take the maxi-
mum.
Adjustment Location:
Head Azimuth
Adjustment Screw
|
db
es
SQ,
:
~
Ds
Rap SS
Soe
SN
EK
SG
@
y /
\
EI //
LH
'
BA
lf
Tape Speed Adjustment
Setting:
VOLUME
control:
mechanical mid
VOR switch:
OFF
or
digital frequency
counter
test tape
WS-24
(3 kHz, -10 dB)
——
j
earphone jack
Specification:
Speed checker | Digital frequency counter
£5%
1,425 — 1,575 Hz
Frequency
difference
between
the
beginning
and the end of the tape should be within 0.5%.
2.4 cm/s (15 Hz)
1.2 cm/s (7.5 Hz)
Reference wow:
0.6% or less at 2.4cm/s
1.3% or less at 1.2 cm/s
Adjustment Location:
blind plate
7.2cm
speed adjustable resistors

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