SOUND READER ASSEMBLY
ADJUSTMENTS to those components relevant to scanning the optical soundtrack are best
performed by qualified personnel equipped with the necessary test equipment. Attempts to effect field repairs
without use of the required test equipment are generally detrimental to sound quality.
1.
An L.E.D. (Light Emitting Diode) is positioned directly behind the film plane to illuminate the soundtrack.
The horizontal and vertical positioning is adjustable. The distance of the L.E.D. from the film plane is
factory set. The L.E.D. is powered by a remote, low-voltage, current regulated power supply.
2.
An Analog Signal Pick-Up Assembly is mounted in front of the film plane, and contains the lensing, the
solar cells, pre-amps, and terminals for the cell output. This assembly is factory-set to maximize the
reception of the signal generated by the L.E.D.
3.
A second L.E.D. illuminator and signal pick-up are required for scanning Dolby
®
digital prints. These
components are mounted adjacent to the analog elements, 45° off the analog axis. A second L.E.D. power
supply is also required.
An L.E.D. features a much longer life than an incandescent exciter lamp, and eliminates signal loss
because of sagging or aging bulb filaments. The one-piece Signal Pick-Ups detect only L.E.D. inputs, and
stray booth lighting does not affect the solar cell output. Channel separation is enhanced by incorporating the
solar cells within the sealed lens assembly.
Film Path
IN
Film Path
OUT
Signal Pick-Up Assembly,
DIGITAL
Signal Pick-Up Assembly,
ANALOG
L.E.D. Illuminators
8
Impedance Drum
Holdback
Sprocket
Summary of Contents for APOGEE
Page 17: ...12 Figure B is in optimal alignment ...
Page 35: ...30 FILM TRAP Assembly No 52 00223 ...
Page 39: ...34 APOGEE LENS TURRET Assembly No 52 00279 ...
Page 45: ...CONTROL CABINET Wiring Diagram 40 ...
Page 54: ...OIL PUMP ASSEMBLY 49 ...
Page 63: ......