
8
Analog Illumination
Thread and run Dolby Cat. No.566 Illumination uniformity test film. Use a 9/64 allen wrench to loosen
the socket head cap screw enough to permit moving the copper LED mount by hand. Ensure that both
channels of the optical pre-amp are at equal gain. Rotate the assembly to achieve the highest traces. Move
the assembly in and out to illuminate equally all six-frequency bands.
Pay most attention to the extreme left and right. In a dual system you may have to move the digital LED
out of the way a bit to give yourself adjustment room. Tighten the screw when adjustment is complete.
Minimal torque is required. The large surface area makes excessive tightening unnecessary.
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