17
REC Bias Adjustment
DECK B
Procedure:
1. Mode: Record
2. Mode: Playback
3. Confirm playback the signal recorded in step 1 become speci-
fied value as follows.
If these values are out of specified value, adjust the RV341
(L-CH) and RV441 (R-CH) on the AUDIO board to repeat
steps 1 and 2.
Specified value: Playback output of 315 Hz to playback
output of 10 kHz: ± 0.5 dB
Adjustment Location: AUDIO board
REC Level Adjustment
DECK B
Procedure:
1. Mode: Record
2. Mode: Playback
3. Confirm playback the signal recorded in step 1 become speci-
fied value as follows.
If these values are out of specified value, adjust the RV301
(L-CH) and RV351 (R-CH) on the MAIN board to repeat steps
1 and 2.
Specified value:
AUDIO OUT jack PB level: 47.2 to 53.0 mV (–24.3 to –23.3 dB)
Adjustment Location: MAIN board
– MAIN BOARD (Conductor Side) –
– AUDIO BOARD (Component Side) –
– LEAF SW BOARD (Component Side) –
RV401
RV301
RV341
RV311
RV411
IC602
CN601
L
R
R L
RV441
PB LEVEL
– DECK B –
REC BIAS
L
R
PB LEVEL
– DECK A –
TAPE SPEED
RV1002
RV1001
(NORMAL) (HIGH)
CN1001
attenuator
1) 315 Hz
2) 10 kHz
50 mV (–23.8 dB)
PFJ-1
or
STR-
NX300
AUDIO IN jack
600
Ω
blank tape
CN-123
AF OSC
set
+
–
recorded
portion
level meter
AUDIO OUT jack
PFJ-1
or
STR-
NX300
set
attenuator
315 Hz, 50 mV (–23.8 dB)
AUDIO IN jack
600
Ω
blank tape
CN-123
AF OSC
PFJ-1
or
STR-
NX300
set
+
–
recorded
portion
level meter
AUDIO OUT jack
PFJ-1
or
STR-
NX300
set
RV351
(R-CH)
RV301
(L-CH)
IC301
REC
LEVEL
CN301
1
3
Содержание HTC-NX300
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