Optimus UP120M4 Manual page 13

UP120M4 AMPLIFIER
(7) VENTILATION OUTPUT.
Do not obstruct this output under no circumstances.
There is a fan in the rear panel, always in operation, changing its speed depending on the
temperature reached in the equipment.
(8) ADJUSTMENT OF OPTIONAL OSCILLATORS.
If OSC-02 (optional circuits needed for the lines supervision) are installed into the UP120M4,
these controls allow adjusting the oscillation signal level.
To do the adjustment, follow the steps indicated in the manual of the DALA-01/DA card. The
adjustment must be done with the corresponding loudspeakers line loaded.
Place the oscillators circuits. Follow the steps shown in the figure 4
Fig. 4
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UP120M4