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SYMPTOM
54. Excessive amplifier hum
(optical)
- continued -
55. Exccssivc amplifier hum
{magnetic}
{souND SYSTEM}
PROBABLE CAUSE
5. Front or rear cover speaker
jacks not insulated from the
chassis properly
6. Defective amplifier module
1. Poor film rerording
2. Motor shield not installed
3. lmproper connectaon to an
external amplifier or sound
system.
4. Magnetic head in poor con-
tact with the film.
5. Poor shielding to the head or
the head coil shorted to the
projector's frame
6- Defective amplifier module
REMEDY
5- Check & repair.
6. Repair or replace
{See Sec +2 & 3-2)
l. Check with another film.
2.Check & install.
3. Check & re-connect properly
4. Adlust
(See Sec G2)
5. Rcpair
6. Repair or replace
{See Scc 4-2 & 3-2l'
l. Check & replace
2. Check & re-install
3. Rcplace
4. Replace
5.Try a known good recording
6. Check & realign
(See Sec 6-1i
7. Check & clcan
8. Sce Symptom No. 57
-1
. Check, clean, lubricate
adjust (See Sec 5-5)
2- Check & replace
{See Sec 5-7)
3. Check & adjust
(See Sec 5-3)
4. Check
5. Check & adjust
6. Check & adjust
{See Sec 5-5-86)
1. Check & adlust
(See Sec 5-7)
2. Check & replace
{Sec Sec 5-5-85)
56. Distorted sound
57. Excessive wow & flutter
58. Ssund not stabilized
after starting
1 . lncorrect exciter larnp.
2. Exciter lamp cover not com-
pletely installed
3. Amplifier module is defective
4. Defective speaker
5. Magnetic sound recorded
poorly
6. Optical sound lens not aligned
correcdy
?. Dirt on the sound drum or
on the solar cell
8. See Symptom No. 57 also.
1 . l t u b b e r p i n c h r o l l e r b i n d i n g
2.Sound drum bearings dcfcc-
tive
3. Reverse rubber drive roller in
contact with the set collar
4. Flywheel not installed
5. Flywheel rubbing on the
power cord
6. fncorrect alignment or ten-
sion of the t€nsion guide and
roller assembly
l - lnsufficient flywheel plate
sprlng tensron
2- Weak rubber pinch roller
spring
n-
* 1 4 -
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