7-2: Magnetic Sound Playback System A. Description; Alignment; Tools And Equipment; Set-Up Procedure - Eiki ESL SERIES Service Manual

7-2 MAGNETIC SOUND PLAYBACK SYSTEM
A. Description
Models ESL/SSL-2 in addition to the standard optical sound reproduction are equipped with
optional magnetic track (100 mil) playback only. The opt/mag slide switch on the amplifier
effects this conversion by switching the input to the amplifier while at the same time moving
the magnetic playback head into position against the films magnetic sound track.
B. Magnetic Alignment Procedure
1. Tools and Equipment Required
a. Screw driver set
(ISO)
b. Magnetic Azimuth 7000Hz alignment SMPTE test film loop.
c. Pliers
d. AC VTVM (Audio Range) and or
e. Oscilloscope
f. 8 ohm 30 watt dummy load resistor
g. External speaker (front cover)
2. Set-Up Procedure
a. Remove lamp house cover.
b. Set the function control to "STOP".
c. Load the magnetic test loop (oxide side toward the head)
d. Turn the function control to "MIC".
e. Slide the mag/opt switch to mag.
f. Connect the output of the amplifier to the dummy load resistor.
g. Connect the AC VTVM and or the Oscilloscope across the dummy load.
h. Turn the function control to No. 2 operate position, and check for the correct engage-
ment of the magnetic head and the rubber roller.
i. Turn the volume and tone controls to the maximum (clockwise) position.
j. Holding the magnetic head with the pliers coarsely adjust the three screws adjustment
screws for the correct position as shown in (Fig. #106). The head should also contact
the film parallel as illustrated in (Fig. #107).
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