– 13 –
Record Bias Adjustment
Procedure :
1. Mode : Record
DECK B
set
MD IN
1) 315 Hz
2) 10 kHz
blank tape
CS-123
600
Ω
attenuator
AF OSC
38.8 mV (–26 dB)
2. Mode : Playback
3. Confirm playback the signal recorded in step 1 become adjust-
ment level as follows.
4. If these levels do not adjustment level, adjustment the RV341
(L-CH) and RV441 (R-CH) to repeat step 1 and 4.
Adjustment level :
Playback output of 315 Hz to playback output of 10 kHz : –0.5 dB
to 0.5 dB. (–1.3 to 1.3 mV)
Adjustment Location : AUDIO board
Record Level Adjustment
Procedure :
1. Mode : Record
DECK B
3. Confirm playback the signal recorded in step become adjust-
ment level as follows.
4. If these levels do not adjustment level, adjust the RV401 (L-
CH) and RV451 (R-CH) to repeat step 1 and 4.
Adjustment Level :
OUTPUT level : –26 dB ± 0.5 dB (36.7 to 41.1 mV)
Adjustment Location : MAIN board
Adjustment Location :
[AUDIO BOARD] – Conductor side –
set
+
–
recorded
portion
MD OUT
level meter
set
MD IN
315 Hz, 38.8 mV (–26 dB)
blank tape
CS-123
600
Ω
attenuator
AF OSC
+
–
level meter
RV301: Playback Level (Deck B L-CH)
RV401: Playback Level
(Deck B R-CH)
RV651:Tape Speed
(Normal)
RV652: Tape speed
(HIGH)
RV311: Playback Level
(Deck A L-CH)
RV411: Playback Level
(Deck A R-CH)
RV341: Record Bias (L-CH)
RV441: Record Bias (R-CH)
[MAIN BOARD] – Component side –
RV401:
Record Level (L-CH)
RV451:
Record Level (R-CH)
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