Section 7 Audio Alignment
7 - 10
May 1992
MX-5050 Operation and Maintenance Manual
7.4.3 Record Level Adjustment
1. Thread the machine with tape and set the SPEED Select Switches for the Tape
Speed most often used.
2. Set both RECORD READY butons to the READY position.
3. Set both Monitor button to TAPE position.
4. Press the 1kHz Test Oscillator button on the AMP Panel. Adjust the Input
Control knob so that the VU meters indicate 0VU. (Input a signal level of
–10VU for 7.5 ips.)
5. Press the PLAY and RECORD buttons to begin recording.
6. Adjust VR305 on the REC/REP PCB Assembly so that the CH 1 VU meter
indicates 0 VU (–10 VU if adjusting at 7.5 ips).
7. Check to see that there is no difference in the indication on the VU meters
when switching between SOURCE and TAPE modes.
8. Repeat Steps 4 and 7 for Channel 2 by adjusting VR405.
7.4.4 Record Equalization Adjustment
NOTE: These adjustments should be performed after the Playback
Equalization and Record Bias adjustments are completed.
1. Thread the machine with tape and set the SPEED select switch to the HI
position, (15 ips for High Speed, 7.5 ips for Low Speed).
2. Press the 10kHz Oscillator Frequency button to activate the Test Oscillator.
3. For High Speed models(HI; 15ips), adjust the Input Level knob until the VU
meter indicates 0VU. For Low Speed models(HI; 7.5 ips), adjust the Input
Level knob until the VU meter indicates –10VU.
4. Set the Monitor button to TAPE position. Set both RECORD READY buttons
to the Ready position, and press the PLAY and RECORD buttons to begin
recording.
5. Adjust VR303 (REC EQ H) on the REC REP PCB Assembly until the VU meter
indicates 0 VU (–10 VU for Low Speed).
6. Repeat Step 5 for Channel 2 using VR403.
7. After setting the SPEED select switch to the Lo position, repeat Steps 3
through 6 using the REC EQ L trimmer (VR304 for CH1, VR404 for CH2). For
High Speed models, adjust the trimmers until the VU meter indicates –10VU
at step3 and 5. For Low Speed models, adjust the trimmers until VU meter
indicates -20 VU at steps 3 and steps 5.
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