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Idiomas disponibles
Q Q
3 7 6 3 1 5 1 5 0
4. Overall Level Characteristic and Distortion Factor
Check
Purpose:
Check the record level, play level, and distortion factor against the
reference input.
Mode
REC and PB (SP mode)
Signal
400 Hz, –7.5 dBs
Measurement point
Audio output terminal
Measurement equipment
Audio level meter and distortion
factor meter
Specified value
Playback level: –7.5 ± 4.0 dBs
Distortion factor: 4% or less
Confirmation Method:
1) Supply an audio signal of 400 Hz, –7.5 dBs simultaneously to
both L and R channels of Audio Line Input.
2) Make recording
3) Play back a recorded portion.
4) Confirm that a playback level is –7.5 ± 4.0 dBs. (mono audio)
5) Confirm that a distortion factor is within 4%.
5. Overall S/N Check
Purpose:
Confirm that the S/N is within the specification.
Mode
REC and PB (SP mode)
Signal
Short
Measurement point
Audio output terminal
T E
L
1 3 9 4 2 2 9 6 5 1 3
Measurement equipment
Audio noise meter
Specified value
–46.0 dBs or less
Confirmation Method:
1) Connect both L and R channels of audio line input to the GND.
2) Start recording.
3) Play the recorded part to confirm that the noise is below –46.0
dBs.
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.
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2-5.
TUNER SYSTEM ADJUSTMENT
[Connection]
Up channel
47 k
convertor
VCR
RF IN
Fig. 7-2-6
2-5-1.
Separation Adjustment (SLV-EX8S/EX9S)
Purpose:
Mixed audio signal separate Lch and Rch.
Mode
E-E
Signal
VIDEO:
color bar
(87.5% modulation)
AUDIO:
L 1 kHz 100% modulation
R no signal
ELECTRIC FIELD:
60–80 dBs/75 W Tem
Measurement point
Pin qs of IC701
Measurement equipment
Audio level meter
Adjusting Element
RV701
Specified value
–9.9 ± 0.2 dBm
(700 ± 14 mVp-p)
x
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y
i
7-5
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8
2-6.
PARTS ARRANGEMENT DIAGRAM FOR ADJUSTMENTS
MA-377 BOARD (Component Side)
Audio level
meter
CN202
RV701
SEPARATION
IC701
13
1
Q
Q
3
7
6
3
1
JS401
PSM17-501 BOARD (Conductor Side)
.
2
4
9
9
8
1
4
5
1
5
0
8
9
2
4
9
19
1
18
2
CN102
m
c o
7-6 E
2
9
9
8
2
9
9
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