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— 31 —
Playback Level Adjustment
Procedure :
1. Mode : FWD playback
1. Mode : FWD playback
Adjust SFR01 (L-CH) and SFR02 (R-CH) so that the reading on
level meter meets the adjustment limits below.
level meter meets the adjustment limits below.
Adjustment Limits :
LINE OUT level : -7.7 ± 0.5 dB (301.5 to 338.5 mV)
Level difference between channels : within 0.5 dB
Check that the LINE OUT level does not change even if Playback
and Stop operations are repeated several times.
Adjustment Location : DOLBY board (Refer to page 32.)
LINE OUT level : -7.7 ± 0.5 dB (301.5 to 338.5 mV)
Level difference between channels : within 0.5 dB
Check that the LINE OUT level does not change even if Playback
and Stop operations are repeated several times.
Adjustment Location : DOLBY board (Refer to page 32.)
Record BIAS Adjustment
Setting :
•
The REC LEVEL control must be positioned at the standard record
level position. (Refer to page 29.)
level position. (Refer to page 29.)
Procedure :
1. Mode: Record
1. Mode: Record
2. Playback
3. Reproduce the portion of tape which is recorded in step 1.
Confirm that the playback level stays within the specified range
of the Adjustment Level.
of the Adjustment Level.
4. If the playback level is outside the specified range, adjust the
SFR03 (L-CH) and SFR04 (R-CH), and repeat steps 1 to 3 until
the specified range is satisfied.
Adjustment Level : Difference of the playback level between
10 kHz and 315 Hz : 0 dB ± 0.5 dB when 315 Hz is the reference.
Adjustment Location : DOLBY board (Refer to page 32.)
the specified range is satisfied.
Adjustment Level : Difference of the playback level between
10 kHz and 315 Hz : 0 dB ± 0.5 dB when 315 Hz is the reference.
Adjustment Location : DOLBY board (Refer to page 32.)
test tape
P-4-L300
(315Hz, 0dB)
set
LINE OUT
level meter
set
AF OSC
attenuator
600
Ω
blank tape
CS-123
LINE IN
1) 315Hz
2) 10kHz
2) 10kHz
50mV (– 23.8dB)
recorded portion
set
LINE OUT
level meter
Record Level Adjustment
Setting :
•
The REC LEVEL control must be positioned at the standard record
level position. (Refer to page 29.)
level position. (Refer to page 29.)
Procedure :
1. Record
1. Record
2. Playback
3. Reproduce the portion of tape which is recorded in step 1.
Confirm that the playback level stays within the specified range
of the Adjustment Level.
of the Adjustment Level.
4. If the playback level is outside the specified range, adjust the
SFR11 (L-CH) and SFR12 (R-CH), and repeat steps 1 to 3 until
the specified range is satisfied.
Adjustment Level : -23.8 dB ± 0.5 dB (47.3 to 53.1 mV)
Adjustment Location : DOLBY board (Refer to page 32.)
the specified range is satisfied.
Adjustment Level : -23.8 dB ± 0.5 dB (47.3 to 53.1 mV)
Adjustment Location : DOLBY board (Refer to page 32.)
315Hz, 50mV (–23.8dB)
set
AF OSC
attenuator
600
Ω
blank tape
CS-123
LINE IN
recorded portion
set
LINE OUT
level meter
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