Sony TC-188SD - Record Bias and Level Adjustments

VU
Meter
Calibration
Procedure:
1.
Mode:
Standard
record
(See
page
11.)
af osc
O attenuator
14
O-—=-O
LINE OUT
LINE IN 0.44V (-5 dB)
333.Hz, 0.25V (-10dB)
2s
VU
meter
reading:
0
VU
Adjust
the
pattern
connection.
Specification:
When
the
LINE
IN
level
is
adjusted
to
make
0
VU
indication,
VTVM
reading
should
be
0.44V (-5 dB).
Adjustment
Location:
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185
285
TC-1885D
Record Bias Adjustment
Procedure:
1.
Mode:
Standard
record
(See
page
11.)
af osc
blank tape
SONY CS-10
10k
attenuator
O
St1,00 0
LINE IN
5 ieee 7.7mV (-40dB)
2. Mode: Playback
—
vrei
100
k22
[7]
im
LINE
OUT
Adjust
C153
(L-CH)
and
C253
(R-CH)
to
make
10kHz
and
1
kHz
signal
output
levels
equal.
Level difference between
the
two
output
levels:
OdB+1dB
Adjustment
Location:
C253
(R-CH)
C153
(L-CH)
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Record
Level
Adjustment
Procedure:
1.
Mode:
Standard
record
(See
page
11.)
blank tape ;
SONY CS-1
af
osc
C$-20
CS-30
10k2
attenuator
O
ETE |
O-——O O
(1G 00 O
LINE IN
333Hz, 0.25 V (-10dB)
2. Mode: Playback
recorded
portion
VTVM
LINE OUT
Adjust
RV103
(L-CH)
and
RV203
(R-CH)
to
obtain
0.44V
(-5
dB)
VTVM
reading.
3.
Change
the
blank
tape
to
CS-20
and
CS-30,
and
perform
the
same
record
and
playback
pro-
cedure.
Measure
LINE
OUT
level.
Specification:
SONY tape
CS-10
CS-20
CS-30
Adjustment
Location:
0.41-0.46V
(-4.5 —-5.5 dB)
0.37—-0.52V
(-3.5 —-6.5 dB)
RV103
(L-CH)
RV203
(R-CH)
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19
kHz
Filter
Adjustment
Procedure:
DOLBY
NR
switch:
ON
Mode:
Standard
record
(See page 11.) _
af osc
LINE OUT
LINE IN
19
kHz
+20Hz,
0.25V
(-100B)
Adjust
the
pattern
connection
for
a
minimum
reading
on
VT
VM.
Adjustment
Location:
connect
132
133
; 232
(L-CH) C539 (R-CH)
Me
C
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