Bell and Howell 1598, User Manual

Page: 19 / 38

P a n chromatic TQIII & TQIII Specialist User Manual
Page
19
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Problem
Picture normal, then becomes and remains unsteady; heavier than normal sound from
projector mechanism and possibly distorted sound from loudspeaker.
Cause
A bad join, or condition of perforations too poor for the automatic loop reformer to make
all necessary corrections.
Remedy
Leave projector running but press system restorer 32f fully down for a few seconds, then
release it. This action momentarily brings the whole of the automatic threading system
back into operation, thus restoring the correct relationships between the film and the
sprocket wheels, film gate and sound system. Do not use the system restorer when the
projector is running in reverse.

Problem
Scratch appearing on screen.
Cause
This is almost certainly an existing scratch. Examine film coming down from front spool. If
scratch remains on screen but is not seen entering projector, proceed to....
Remedy
Switch off immediately. Inspect and clean film path between entry roller "4" and
projection aperture in gate (Stages 63.64).

Problem
Scratch not visible on screen but visible on film at rear of projector.
Cause
Almost certainly an existing scratch but outside the projected area. Examining film as it
runs from front spool will show whether this is so. If scratch is not present at entry roller
"4" but continues to be present at exit from projector, some abrasive particle has probably
been carried by the film into the projector.
Remedy
Switch off and clean entire film path (Stages 63, 64). If scratching persists, stop the
projector and, unthreading progressively if necessary as described in Stages 45-50,
determine the exact point in the film path, and on which side of the film, the scratch
begins. Concentrate then on removing all foreign matter from this area. Films may be
encountered which have been "spliced" with wire staples or similaily abused. If you are