2. Hi8/Standard8 AFM 1.5 MHz Deviation Adjustment4. Digital8 Playback Level Check
(VC-250 board)ModePlayback
Adjust to the optimum 1.5MHz audio FM signal deviation.
SignalDigital8 alignment tape:
If the adjustment is not correct, its playback level will differ fromFor audio operation check
that of other units.
(WR5-3ND (NTSC))
ModePlayback(WR5-3CD (PAL))
SignalHi8/Standard8 alignment tape:
Measurement PointAUDIO OUT jack LEFT or RIGHT
For checking AFM stereo operationMeasuring Instrument Audio level meter and frequency
Monoscope section
(WR5-9NS (NTSC))counter
Specified Value32 kHz mode: 1 kHz, +3.0 ? 2.0dBs
(WR5-9CS (PAL))
Measurement PointAUDIO OUT jack LEFT or RIGHT48 kHz mode: 1 kHz, +3.0 ? 2.0dBs
44.1 kHz mode:
Measuring Instrument Audio level meterThe 7.35kHz signal level during EMP
Adjustment PageFOFF is +2.0 ? 2.0dBs.
The 7.35kHz signal level during EMP
Adjustment Address7B
Specified Value�7.5 ? 2.0dBsON is �6 ? 2 dB from the signal level
during EMP OFF.
Adjusting method:
1) Select page: 0, address: 01, and set data: 01.Checking Method:
1) Check that the playback signal level is the specified value.
2) Set the Hi-Fi SOUND switch (menu display) to O1�.
3) Select page: F, address: 7B, change the data and set the 400Hz
signal level to the specified value.
5. Overall Level Characteristics Check
4) Press the PAUSE button.
5) Set the Hi-Fi SOUND switch (menu display) to OSTEREO�.ModeRecording and playback
6) Select page: 0, address: 01, and set data: 00.Signal400Hz, �7.5dBs signal: Audio
terminal left and right of AUDIO/
3. Hi8/Standard8 AFM 1.7 MHz Deviation AdjustmentVIDEO INPUT jack
(VC-250 board)Measurement PointAUDIO OUT jack LEFT or RIGHT
Adjust to the optimum 1.7MHz audio FM signal deviation.
If improper, this causes deteriorated separation (with stereo signal).Measuring Instrument Audio level meter
Specified Value�7.5 ? 3.0dBs
ModePlayback
SignalHi8/Standard8 alignment tape:Checking Method:
For checking AFM stereo operation1) Input the 400Hz, �7.5dBs signal in the audio terminal left and
Monoscope section
right of AUDIO/VIDEO INPUT jack.
(WR5-9NS (NTSC))2) Record the signal.
(WR5-9CS (PAL))
3) Playback the recorded section.
Measurement PointAUDIO OUT jack LEFT or RIGHT4) Check that the 400Hz signal level is the specified value.
Measuring Instrument Oscilloscope
Adjustment PageF6. Overall Distortion Check
ModeRecording and playback
Adjustment Address7C
Signal400Hz, �7.5dBs signal: Audio
Specified Value�7.5 ? 2.0dBsterminal left and right of AUDIO/
Adjusting method:VIDEO INPUT jack
Measurement PointAUDIO OUT jack LEFT or RIGHT
1) Select page: 0, address: 01, and set data: 01.
2) Set the Hi-Fi SOUND switch (menu display) to O2�.Measuring Instrument Audio distortion meter
3) Select page: F, address: 7C, change the data and set the 1kHzSpecified ValueBelow 0.4%
signal level to the specified value.(200Hz to 6kHz BPF ON)
4) Press the PAUSE button.
5) Set the Hi-Fi SOUND switch (menu display) to OSTEREO�.Checking Method:
6) Select page: 0, address: 01, and set data: 00.1) Input the 400Hz, �7.5dBs signal in the audio terminal left and
right of AUDIO/VIDEO INPUT jack.
2) Record the signal.
3) Playback the recorded section.
4) Check that the distortion is the specified value.
5-32 |
ACEC
SONY
