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4 7 .
SYMPTOM
No sound and the
lamp is not on
48. No sound, exciter lamp is on
49. Poor sound or low volume
V: SOUND SYSTEM
PROEABLE CAUSE
exciter
1. Amplifier is not turned on.
2.9 pin amplifier plug defective
3. Defective exciter lamp
4. Defective exciter lamp socket
5. Exciter larnp fuse blown
6. Defective arnplifier module
T. Defective exciter lamp power
supply of the transformer
l. Amplifier volurne is tao low.
2. Mag/Opt switch in the wrong
position (N ST/NT-2,-3 models
only)
3.Rear
cover sp€aker not
plugged in {not applicable on
NST/NT-3 models), or exten-
sion speakers not connected-
4. Defective rear coYer speaker,
or
extension speaker, or
speaker iack.
5. Amplifier fuse blown
6. Defective solar cell of con-
nections
7. Dirt or foreign objcct in the
optical sound lens
8. Defective amplifier module
l. Incorrect,or defective exciter
lamp, or sound lens.
?. Dirty exciter lamp, or sound
Iens, or dirt, foreign object in
the optical sound lens
3. Sound optics
incorrectly
aligned.
4. Low exciter lamp voltage, or
low AC supply voltage.
5, Weak or defective solar cell.
6. Defective speakers, or poor
speaker connection
7. Poor film quality
8. Defective amplifier module
REMEDY
1 . T u r n o n .
2. Check & repatr, or replace.
3. Replace
4- Repair or replace
5. Check & replace
6, Reptace, or repair
{See Sec 3-2, & 4-21
7 . Losate & repair, or replace,
(See Sec 44)
1. Check & adjust.
?. Check & switch
3- Check & connect.
4. Repair or replace.
5. R.eplace
6. Repair or replace
(See Sec 42)
7. Clean.
B. Lscate & repair, or rcplacc
{See Sec 3-2 & +21
1. Check & rbplace
2. Clean, or replace-
3. Check & re-align sound pick-
up system {See Sec 6-1 }
4. Check &
repair amplifier
exciter lamp supply. {See Sec
4-21. Cheek wal I outlct.
5- Replace-
6- Check & replace
7- Check with another film.
8. Repair or replace"
{See Sec 3-2, & 4-2}
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