Upper Loop Former And Film Guard - Eiki ESL SERIES Service Manual

2. Upper Loop Forming Roller And Film Guard
a. Function: The position of the upper loop forming guide roller is determined by the
position of the function switch;
Position A: The function switch is at "STOP" position for the film loading, or at
(Fig.
#69)
"@"
for the rewinding.
This is the actual upper loop forming position. When turning the function
switch from "STOP" to "MIC", the upper loop forming guide roller kicks
upward to form the enough upper loop.
As keep turning the function switch to "MIC' (or fj) ,
« )
positions, the
roller comes down and stays at this position "C", ready to activate the
"Film Guard" switch should the upper loop be lost.
Note the distance between the top edge of the upper loop guide bracket till
the projector's chassis is approximately 13mm.
Position D: When the upper loop is lost due to the bad film with a series of damaged
(Fig. #72) perforations by more than about 6 frames, .the loop forming guide roller is
pulled by the film and moves to this position "D".
As the roller moves to this position, the film guard is activated at the same
time and shuts off the power, stopping the projection to protect the film
from the further damage.
To re-start the projection, turn the function switch to "STOP", then back
to
«
position.
b. Adjustment: The upper loop arm assv, when inserted into the hole of the main frame
casting without being engaged with
the
plate spring, should be free to rotate. Check for
Position B:
(Fig. #70)
Position C:
(Fig. #71)
a smooth rotation.
Fig. #69
Fig. #71
Fig. #70
Fig. #72
_,.
Fig. #73
I
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