MX-5050 Operation and Maintenance Manual
May 1992
Section 7 Audio Alignment
7 - 3
7.2 Preliminary Adjustments
These adjustments are performed when first receiving the machine, and then
again only when an audio component, such as the Heads, is replaced.
7.2.1 Peak Indicator Level Adjustment
NOTE: The PEAK indicator is factory preset to illuminate at a level equivalent
to 1040 nWb/m, which corresponds to approximately 3% THD.
1. Check the trigger level corresponding to the set Magnetic Reference Flux
Level.
Magnetic Ref. Flux Level Trigger Level
185 nWb/m Standard Level + 15.0 dB
250 nWb/m Standard Level + 12.4 dB
320 nWb/m Standard Level + 11.2 dB
2. Connect an oscillator to the CH1 INPUT connector, adjust the oscillator so
that it generates a sine wave (1kHz) at the trigger level. Confirm that neither
of the internal Test Oscillator buttons are pressed.
EXAMPLE: Set the oscillator to +16.4 dBu when the Magnetic Reference
Level is 250 nWb/m and the Reference Level is +4 dBu.
3. Set the Monitor button to SOURCE position (not depressed).
4. Adjust VR701 for CH1 and VR801 for CH2 on the VU Meter Amp PCB which
is located behind the VU meter so that the peak indicator illuminates at the
trigger level.
Table 7-2
Trigger Level
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