3-6.AUDIO SYSTEM ADJUSTMENT1. 1.5 MHz Deviation Adjustment (VC-215 board)
Adjust to the optimum audio FM signal distortion.
[Connecting the measuring instruments for the audio]If the adjustment is not correct, its playback level will differ from
Connect the audio system measuring instruments besides the videothat of other units.
system measuring instruments as shown Fig. 5-3-25.
ModePlayback
SignalAlignment tape:
Y Connection of Audio generator and attenuator.For checking the operation
(WR5-5CSP)
Measurement PointAudio output terminal
AudioMeasuring Instrument Audio level meter
Adjustment PageF
generator600 WAUDIOAdjustment Address46
terminal
AttenuatorSpecified Value�7.5?0.5dBs
Adjusting method :
1) Select page: 0, address: 01, and set data: 01.
Parts cord 600 W :2) Select page: F, address: 46, change the data and set the 400Hz
270 (1-249-410-11) + 330 (1-249-411-11)signal level to the specified value.
3) Press the PAUSE button of the adjusting remote commander.
4) Select page: 0, address: 01, and set data: 00.
Y Connection of Audio level meter or distortion meter
Audio level meter2. BPF Adjustment (VC-215 board)
or distortion meterAdjust to the optimum audio BPF characteristics of the IC.
If the adjustment is not correct, the distortion rate and S/N ratio will
worsen.
AUDIOModePlayback
terminalSignalAlignment tape:
For BPF adjustment
47kW(WR5-11CS)
Measurement PointAudio output terminal
Parts cord 47kW : 1-249-437-11Measuring Instrument distortion meter
Adjustment PageF
Adjustment Address47
Specified ValueThe distortion rate should be and
Fig. 5-3-21.minimum.
Adjusting method :
1) Select page: 0, address: 01, and set data: 01.
2) Select page: F, address: 47, change the data and minimize the
distortion rate.
3) Press the PAUSE button of the adjusting remote commander.
4) Select page: 0, address: 01, and set data: 00.
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ACEC
