EAW Loudspeaker's R o b l e m S y m p t o m s, R i v e r s, N p u t P a n e l a n d W i r i n g

Page 36

3.Internal electronics (powered loudspeakers)

4.Enclosure and integral hardware

If no problems can be traced to any of these items, look for problems with external electronics or cabling. Troubleshooting these items is beyond the scope of this manual.

1 2 . 4 . 2 D r i v e r s

A faulty driver will usually cause readily audible distortions or other unwanted noises. In other cases, they may stop functioning. Use your ears and test signals or other sound source to determine which one is at fault. Normally, a faulty driver requires return for service or replacement by EAW.

1 2 . 4 . 3 I n p u t P a n e l a n d W i r i n g

Faults with these items will usually cause a driver to stop working or be intermittent.

For unpowered loudspeakers:

Check wiring continuity from the input jacks to the crossovers and from the crossovers to the driver terminals. Many faults in this area can be field-repaired.

For powered loudspeakers:

Check wiring continuity at the input jacks and from the amplifier(s) to the driver terminals. Many faults in this area can be field-repaired.

1 2 . 4 . 4 C r o s s o v e r s

NOTE: This section does not apply to powered loudspeakers.

Faults with these items will usually cause drivers to stop working, be intermittent, or alter the frequency response. If a crossover fault is suspected, the nature of the fault determines the action. A poor connection or obviously open circuited, shorted, or physically damaged component (such as from overheating) can be relatively easy to find and field- repair. An improperly functioning component may require more sophisticated troubleshooting, as the fault will likely be frequency dependent. A faulty crossover is best returned for service or replacement by EAW.

1 2 . 4 . 5 E n c l o s u r e a n d I n t e g r a l H a r d w a r e

Enclosure problems, such as loose hardware, faulty joints, or other structural problems, will usually be heard as distinct buzzes, rattles, or other unwanted noises. To test for enclosure problems, use a sine wave signal manually swept on the LF sub-system. The input level should be varied, because certain problems can be level as well as frequency specific. However, in no circumstances should the sine wave level be higher than 6 dB below rated power (equal to no higher than 1/2 rated rms voltage). It may be possible to field-repair some enclosure problems.

1 2 . 5 P r o b l e m S y m p t o m s

Loudspeaker difficulties usually fall into one of the following categories. The causes for each problem are listed in the most likely order of probability.

22

Page 35 Page 37
Image 36
Page 35 Page 37
Contents W L O U D S P E a K E R O W N E R ’ S M a N U a L Important Safety Precautions -Read This First Iii Consignes DE Sécurité À Lire EN Premier Precauzioni DI Sicurezza DA Leggere PER Primo Page Precauciones DE Seuridad LEA Esto Primero ViiSicherheitshinweise Zuerst Lesen ViiiPage C D e c l a r a t i o n o f C o n f o r m i t y I g g i n g M o u n t i n g / S u s p e n s i o nPage U r c h a s e r a n d U s e r R e s p o n s i b i l i t y XiiContents Xiv Section Rigging / Mounting / SuspensionH i p p i n g D a m a g e E t u r n i n g P r o d u c t t o E AWE f i n i t i o n s I g g i n g I n f o r m a t i o nPage Wo r k i n g L o a d L i m i t s Rigging Design E s i g n Fa c t o rI g g i n g D e s i g n P r a c t i c e s I g g i n g H a r d w a r e a n d a c c e s s o r i e sAmplifier Power Requirements E l e c t i n g a n a m p l i f i e rO w e r R a t i n g s Locating the Loudspeaker R e v e n t i n g L o u d s p e a k e r D a m a g eM b i e n t Te m p e r a t u r e s Te m p e r a t u r e C h a n g e sE a t S i n k Ve n t i l a t i o n T a g e M o n i t o r a p p l i c a t i o n sI g n a l L e v e l s Signal Connections E u t r i k N L a n d C a n n o n a P C o n n e c t o r sTw o C o n n e c t o r s O u d s p e a k e r W i r e G a u g eTypical XLR-3 Input and Loop Through Connectors N p u t C o n n e c t i o nO o p o r T h r u C o n n e c t o r Signal Processing N p o w e r e d L o u d s p e a k e r sN p u t C a b l e I n g l e a m p l i f i e d M o d eU b w o o f e r S i g n a l P r o c e s s i n g U l t i a m p l i f i e d M o d eN p o w e r e d L o u d s p e a k e r s L i m i t e r s I m i t e r s a n d L i m i t i n gX 8 7 5 0 L i m i t e r D e s i g n X 8 7 5 0 O u t p u t L i m i t e r W i z a r dOperating the Loudspeaker P e r a t i n g L i m i t sC o u s t i c L e v e l P r e c a u t i o n s I m i t e r sTe s t i n g a n d Te s t S i g n a l s P e r a t i n g L e v e l sInspection and Maintenance E a s u r e m e n t sE r i o d i c I n s p e c t i o n V e r a l l P h y s i c a l I n s p e c t i o nI g g i n g I n s p e c t i o n E r i o d i c P e r f o r m a n c e Te s t i n g E r i o d i c M a i n t e n a n c eE r i o d i c a c o u s t i c a l M a i n t e n a n c e O u t i n e M a i n t e n a n c eO s m e t i c M a i n t e n a n c e O n g Te r m M a i n t e n a n c eTroubleshooting I g g i n g P r o b l e m sN c l o s u r e a n d I n t e g r a l H a r d w a r e O s m e t i c sR o b l e m S y m p t o m s R i v e r sN p u t P a n e l a n d W i r i n g R o s s o v e r sO S o u n d o r L o w O u t p u t I s t o r t e d S o u n dO w e r e d L o u d s p e a k e r E l e c t r o n i c s Contacting EAW P e r a t i n g Q u e s t i o n sSection PN 425017 E DEC05
Top Page Image Contents