Sony HCD-GRX30, Руководство по обслуживанию

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4. Mode: Record
5. Mode: Playback
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)
[AUDIO BOARD] (Component Side)
[LEAF SW BOARD] (Component Side)
REC 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.
(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
5. Mode: Playback
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
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.
(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.
attenuator
set
MD/VIDEO (AUDIO) IN
1) 315 Hz
2) 10 kHz
50 mV (–23.8 dB)



600
Ω
blank tape
CN-123
AF OSC
+
–
set
recorded
portion
CN301 (Pin
3
: L-CH)
(Pin
1
: R-CH)
level meter
set
MD/VIDEO (AUDIO) IN
315 Hz, 50 mV (–23.8 dB)
blank tape
CS-123
600
Ω
attenuator
AF OSC
+
–
set
recorded
portion
CN301 (Pin
3
: L-CH)
(Pin
1
: R-CH)
level meter
REC LEVEL
1
3
RV301
L
RV351
R
CN303
CN301
CN304








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
         