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REC Bias Adjustment
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.
(If do not operation of stopped from recording complete, and press
– 0 button then rewind to recording start position.)
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.
3. After press r REC button, press P button, then recording
start.
4. Mode: Record
MD/VIDEO (AUDIO) IN
1) 315 Hz
2) 10 kHz
AF OSC
attenuator
5. Mode: Playback
TE
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recorded
portion
6. Confirm playback the signal recorded in step 3 become
adjustable level as follows.
If these levels do not adjustable level, adjustment the RV341
(L-CH) and RV441 (R-CH) on the AUDIO board to repeat steps
4 and 5.
Adjustable level: Playback output of 315 Hz to playback output
of 10 kHz: ±1.0 dB
Adjustment Location: AUDIO board
REC Level Adjustment
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.
(If do not operation of stopped from recording complete, and press
– 0 button then rewind to recording start position.)
www
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.
3. After press r REC button, press P button, then recording
.
start.
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DECK B
50 mV (–23.8 dB)
blank tape
600 Ω
CN-123
set
level meter
+
set
–
CN301 (Pin 3 : L-CH)
(Pin 1 : R-CH)
DECK B
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2 9
8
4. Mode: Record
MD/VIDEO (AUDIO) IN
315 Hz, 50 mV (–23.8 dB)
AF OSC
attenuator
5. Mode: Playback
recorded
portion
6. Confirm playback the signal recorded in step 3 become
adjustable level as follows.
If these levels do not adjustable level, adjustment the RV301
(L-CH) and RV351 (R-CH) on the MAIN board to repeat steps
4 and 5.
Adjustable level:
CN301 PB level: 47.2 to 53.0 mV (–24.3 to –23.3 dB)
Adjustment Location: MAIN board
[MAIN BOARD] (Component Side)
Q Q
3
6 7
1 3
1 5
[AUDIO BOARD] (Component Side)
RV441
RV401
IC602
RV301
L
R
R L
PB LEVEL
REC BIAS
– DECK B –
[LEAF SW BOARD] (Component Side)
TAPE SPEED
co
(NORMAL) (HIGH)
.
RV1002 RV1001
9 4
2 8
600 Ω
set
level meter
+
set
–
CN301 (Pin 3 : L-CH)
(Pin 1 : R-CH)
1
3
0 5
8
2 9
9 4
RV301
2 8
CN301
L
REC LEVEL
CN303
RV351
R
CN304
CN601
RV311 RV411
RV341
L
R
PB LEVEL
– DECK A –
m
CN1001
9 9
blank tape
CS-123
9 9
15
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