Record Bias Adjustment (Deck B)Record Level Adjustment (Deck B)
Procedure:Procedure:
INTRODUCTIONINTRODUCTION
When set to the test mode perfTape Speed Adjust-ormed in When set to the test mode perfTape Speed Adjust-ormed in
ment, when the tape is rewound after recording, the mentOREC memory, when the tape is rewound after recording, the OREC memory
mode� which rewinds only the recorded portion and plamode� wyback ishich rewinds only the recorded portion and playback is
set.set.
This OREC memory mode� is convenient for performing this ad-This OREC memory mode� is convenient for performing this
justment. During recording, the input signal FUNCTION will auto-adjustment. During recording, the input signal FUNCTION will au-
matically switch to VIDEO.tomatically switch to VIDEO.
1. Press FUNCTION button to select VIDEO. (This ste1. Press FUNCTION bp is notutton to select VIDEO. (This step is not
necessary if the above test mode has already been set.)necessary if the above test mode has already been set.)
2. Load a tape into deck B, and press the r REC button.2. Load a tape into deck B, and press the r REC button.
3. Mode: Record3. Mode: Record
VIDEO/MD (AUDIO) INVIDEO/MD (AUDIO) IN
1) 315 Hz1) 315 Hz
} 50 mV (�23.8 dB)} 50 mV (�23.8 dB)
2) 10 kHz2) 10 kHz
AF OSCAF OSC
blank tapeblank tape
600 WCS-123600 WCS-123
attenuatorattenuator
setset
4. Mode: Playback4. Mode: Playback
recordedlevel meterrecordedlevel meter
positionposition
setset
main boardmain board
CN403 Pin 3 (L-CH)CN403 Pin 3 (L-CH)
Pin 1 (R-CH)Pin 1 (R-CH)
5. Confirm playback the signal recorded in step 2 become adjust-5. Confirm playback the signal recorded in step 2 become adjust-
ment level as follows.ment level as follows.
If these levels do not adjustment level, adjust the RIf these levels do not adjustment leV341 (L-CH)vel, adjust the RV301 (L-CH)
and RV441 (R-CH) on the AUDIO board to repeat steps 3 and 4.and RV351 (R-CH) on the MAIN board to repeat steps 3 and 4.
Adjustment level: The playback output of 10 kHz level differenceAdjustment level:
against 315 Hz reference should be ? 1.0 dBCN403 pla.yback level: 47.2 to 53.0 mV (�24.3 to �23.3 dB)
Adjustment Location: AUDIO boardAdjustment Location: MAIN board
RV301
Adjustment Location[MAIN BOARD] (Component Side)Record Level (L CH)
[AUDIO BOARD] (Conductor Side)
RV341(Lch),RV441(Rch)
Record Bias
13IC401
RV651 (Normal Speed)
RV301RV651 RV652CN403
RV652 (High Speed)
RV401Tape SpeedRV351
RV441 RV341Record Level
RV311
(R CH)
RV301(Lch),RV401(Rch)RV411
Playback Level (Deck B)
RV311(Lch),RV411(Rch)
Playback Level (Deck A)
� 14 � |
ACEC
SONY
