06.02.2013 Views

Bell & Howell - Projector - Filmosound 641 - 642 ... - Cine Information

Bell & Howell - Projector - Filmosound 641 - 642 ... - Cine Information

Bell & Howell - Projector - Filmosound 641 - 642 ... - Cine Information

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FAULT FINDING GUIDE<br />

3. MISCELLANEOUS TROUBLES AND REMEDIES<br />

TROUBLE PROBABLE CAUSE REMEDY<br />

a. Nothing runs Damaged power cable<br />

b. Motor hums but<br />

does not run<br />

c. Motor runs but<br />

mechanism does<br />

not run<br />

d. Rewind does not<br />

operate<br />

e. Take-up does not<br />

operate<br />

f. Feed spindle does<br />

not revolve in<br />

reverse<br />

Loose connections<br />

Fuse blown<br />

Starting circuit open or<br />

shorted<br />

Drive belt off pulley<br />

Motor or driven pulley<br />

loose on shaft<br />

Damaged belt<br />

Animation clutch spring<br />

broken (Des. <strong>642</strong> only)<br />

Rewind clutch not engaging<br />

Rewind clutch slipping<br />

Repair or replace cable<br />

Repair<br />

Replace fuse<br />

Repair loose or transposed<br />

connections<br />

Replace starting capacitor<br />

Replace starting relay<br />

Reinstall belt<br />

Position pulley and tighten<br />

setscrews<br />

Replace belt<br />

Clutch balls or spring lost Replace<br />

Dirt in feed spindle clutch<br />

Clutch balls or spring lost<br />

g. Gate will not lock Latch spring set too close<br />

to lens mount stop<br />

h. Shuttle run 8 but<br />

sprockets do not<br />

revolve<br />

Animation clutch spring<br />

broken or lost (Des. <strong>642</strong> only)<br />

i. Short lamp life Line voltage in excess of<br />

lamp voltage<br />

j. Speed changer<br />

doe8 not work<br />

Blower belt off pulley<br />

Dirt in blower<br />

Knob or shifter crank loose<br />

Shifter out of position<br />

6<br />

Replace spring<br />

Adjust (para. 48)<br />

Adjust (para. 48)<br />

Clean<br />

Replace<br />

Adjust<br />

Replace<br />

Use lamp of correct<br />

voltage<br />

Replace<br />

Clean<br />

Tighten setscrews<br />

Adjust shifter

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