OTARI MX-5050 Manual

Alignment Procedure for Otari MX-5050 B-II
Set SRL switch to SRL position.
PLAYBACK
1. Set the Reference Flux, and EQ to suit the test tape
2. AZIMUTH
a. Adjust for 0º ø on oscilloscope (A4 screw)
3. REPRO LEVEL
a. Play 0VU @ 1kHz and adjust VR106/VR206 for 0VU
4. REPRO EQ
a. Play ƒ sweep and adjust VR102/VR202 for a flat response (15 ips)
b. Play ƒ sweep and adjust VR103/VR203 for a flat response (71/2 ips)
RECORD
1. AZIMUTH
a. Adjust for 0º ø on oscilloscope (A3 screw)
2. RECORD METER LEVEL
a. Set the input level controls to maximum
b. Record 1kHz from a -15dBm source
c. Adjust the Record Level trimpot for 0VU
d. Switch to monitor Source
e. Adjust VR108/208 for 0VU
3. RECORD LEVEL
a. Set the Record flux level switch to M (250nW)
b. Monitor ‘Source’ and set the level to 0VU
c. Monitor ‘Tape’ and start recording
d. Adjust the Record Level trimpot for 0VU

4. RECORD BIAS
a. Record 1kHz tone @ 0VU
b. Adjust the Record Bias trimpot for +3VU
5. RECORD EQ
a. For 15 ips, record 10kHz @ 0VU
b. Adjust the Record EQ (High) trimpot for 0VU
c. For 71/2” ips, record 10kHz @ -10VU
d. Adjust the Record EQ (Low) trimpot for 0VU
6. PEAK LIGHT CALIBRATION
a. Set the record switch to L
b. Connect a signal of 0dBm
c. Set the monitor switch to Source
d. Adjust the line input controls for 0VU
e. Increase the source level to +9dBm
f. Adjust VR701/VR801 (VU meter amp PCB) so that the peak LED comes
on.