21
Record Bias Adjustment (Deck B)
Procedure:
INTRODUCTION
When set to the test mode performed in
Tape Speed Adjustment
,
when the tape is rewound after recording, the “REC memory
mode” which rewinds only the recorded portion and playback
is set.
This “REC memory mode” is convenient for performing this
adjustment. During recording, the input signal FUNCTION will
automatically switch to VIDEO 1.
(After recording, press the
m
button without stopping will
return to the position where recording was started.)
1.
Press FUNCTION button to select VIDEO. (This step is not
necessary if the above test mode has already been set.)
2.
Insert a tape into deck B, press the
REC PAUSE/START
button, and then press the
H
button to start recording.
3.
Mode: Record
4.
Mode: Playback
If these levels do not adjustment level, adjust the RV341 (L-
CH) and RV441 (R-CH) on the AUDIO board to repeat steps 3
and 4.
Adjustment level: The playback output of 10 kHz level difference
against 315 Hz reference should be ± 1.0 dB.
Adjustment Location: AUDIO board
Record Level Adjustment (Deck B)
Procedure:
INTRODUCTION
When set to the test mode performed in
Tape Speed Adjustment
,
when the tape is rewound after recording, the “REC memory
mode” which rewinds only the recorded portion and playback
is set.
This “REC memory mode” is convenient for performing this
adjustment. During recording, the input signal FUNCTION will
automatically switch to VIDEO 1.
(After recording, press the
m
button without stopping will
return to the position where recording was started.)
1.
Press FUNCTION button to select VIDEO 1. (This step is
not necessary if the above test mode has already been set.)
2.
Insert a tape into deck B, press the
z
REC button, and
then press the
H
button to start recording.
3.
Mode: Record
4.
Mode: Playback
5.
Confirm playback the signal recorded in step 2 become
adjustment level as follows.
If these levels do not adjustment level, adjust the RV301 (L-
CH) and RV351 (R-CH) on the MAIN board to repeat steps 3
and 4.
Adjustment level:
CN403 playback level: 47.2 to 53.0 mV (–24.3 to –23.3 dB)
Adjustment Location: MAIN board
5.
Confirm playback the signal recorded in step 2 become
adjustment level as follows.
AF OSC
VIDEO (AUDIO) IN
1) 315 Hz
2) 10 kHz
Blank tape
CS-123
Set
Attenuator
600
Ω
} 50 mV (–23.8 dB)
AF OSC
VIDEO (AUDIO) IN
315Hz 50 mV (–23.8 dB)
Blank tape
CS-123
Set
Attenuator
600
Ω
3 1
CN301
RV301
Record level (L ch)
IC301
RV351
Record level (R ch)
RV441 RV341
RV301(Lch),RV401(Rch)
Playback Level (Deck B)
RV301 RV401
RV341(Lch),RV441(Rch)
Record Bias
RV311(Lch),RV411(Rch)
Playback Level (Deck A)
RV311
RV411
Adjustment Location:
[AUDIO BOARD] (Conductor Side)
[MAIN BOARD] (Conductor Side)
+
–
Set
Recorded
portion
MAIN board CN301C (Pin
1
: L-CH)
(Pin
3
: R-CH)
Level meter
+
–
Set
Recorded
portion
MAIN board CN301C (Pin
1
: L-CH)
(Pin
3
: R-CH)
Level meter
