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Index 

T h e  J B L  5 2 3 1  a n d  5 2 3 2 

E l e c t r o n i c  F r e q u e n c y  D i v i d i n g  N e t w o r k s

 1 

I n s t a l l a t i o n

 1 

O p e r a t i o n

 5 

A p p e n d i x 6 

S e r v i c e  N o t e s

 8 

Professional Division Warranty 

every JBL Professional Series electronic product is 

guaranteed against defects in material and workmanship for a 

period of two years. JBL will replace defective parts and make 
necessary repairs underthis warranty if our examination 
reveals evidence of faulty workmanship or material. The 

warranty does not cover damage caused by misuse, accident 

or neglect. JBL retains the exclusive right to make such deter-
mination on the basis of factory inspection. 

If it is impractical to return the productto the factory, please 

write JBL describing the difficulty or malfunction. JBL may, at 

its option, establish alternative repair procedures or furnish 
replacement parts as appropriate. Products returned to the 

factory must be shipped prepaid. 

The warranty on JBL products shall remain valid only if 

repairs are performed by JBL or under its authorized pro-

cedures, and provided that the serial number on the unit has 

n

o t been defaced or removed. 

J B L  c o n t i n u a l l y  e n g a g e s in  r e s e a r c h  r e l a t e d  t o  p r o d u c t  i m p r o v e m e n t . 

N e w  m a t e r i a l s ,  p r o d u c t i o n  m e t h o d s  a n d  d e s i g n  r e f i n e m e n t s  a r e 
i n t r o d u c e d  i n t o  e x i s t i n g  p r o d u c t s  w i t h o u t  n o t i c e  a s a  r o u t i n e  e x p r e s s i o n 

o f  t h a t  p h i l o s o p h y .  F o r  t h i s  r e a s o n ,  a n y  c u r r e n t  J B L  p r o d u c t  m a y  d i f f e r 

i n  s o m e  r e s p e c t  f r o m its  p u b l i s h e d  d e s c r i p t i o n  b u t is  a l w a y s  w a r r a n t e d 
t o  e q u a l  o r  e x c e e d  t h e  o r i g i n a l  d e s i g n  s p e c i f i c a t i o n s  u n l e s s  o t h e r w i s e 
s t a t e d . 

Содержание 5231

Страница 1: ...Professional Series Technical Manual Electronic Frequency Dividing Networks 5231 Single Channel 5232Dual Channel ...

Страница 2: ...ion establish alternative repair procedures or furnish replacement parts as appropriate Products returned to the factory must be shipped prepaid The warranty on JBL products shall remain valid only if repairs are performed by JBL or under its authorized pro cedures and provided that the serial number on the unit has n o t been defaced or removed J B L c o n t i n u a l l y e n g a g e s in r e s e...

Страница 3: ...other frequencies details provided in the appendix Advantages 1 Lower Distortion The use of electronic frequency dividing networks and multiple amplifiers permits delivery of optimum power over the desired audio spectrum with minimum distor tion By dividing the audio spectrum prior to amplification the individual low frequency and high frequency amplifiers can perform their functions with greater ...

Страница 4: ...h Dual C h a n n e l Active Crossover Figure 1 Typical Installations Of The 5231 And 5232 Compared To Conventional Passive Networks Whenever a midrange or high frequency driver is connected directly to a power amplifier a series capacitor is recom mended to attenuate unwanted low frequency on off switching transient signals which can damage the driver Specific capacitor values are given in Table 1...

Страница 5: ...e case and lift the bottom cover from the chassis 4 Table 1 Minimum Values For Low Frequency Attenuation Capacitors T h e a b o v e c a p a c i t o r s a r e a v a i l a b l e f r o m a n y e l e c t r o n i c s parts s u p p l i e r C a p a c i t o r b r e a k d o w n v o l t a g e s s h o u l d b e g r e a t e r t h a n 7 5 V D o n o t u s e p o l a r i z e d electrolytic c a p a c i t o r s p a...

Страница 6: ...ts A separate pair of screw terminals located on the rear panel is provided for the low and high frequency output of each channel Outputs will drive the high impedance bridging line input of any conventional amplifier Typically the impedance of a bridging input is at least 5000 ohms usually 10 000 ohms or more therefore two or more power amplifiers can be driven by a single electronic frequency di...

Страница 7: ...uency Level control Correct system wiring will be verified if the treble com ponent of the program material simultaneously increases in level while coming from the midrange and high frequency drivers Transducer Phasing One important factor contributing to the natural sound character of a loudspeaker system is the phase relationship of the transducers for an octave below and above each cross over f...

Страница 8: ...he normal listening location If subjective analysis is to be used and the power amplifiers are equipped with level controls initially adjust the controls to one half of their full rotation and then regulate as necessary Subjective Adjustment Of Bi Ampiified Systems The fol lowing applies to a 5231 or to each channel of a 5232 used in dual channel bi amplification 1 With the High Frequency Level co...

Страница 9: ...ce SEACOR or AMPEREX metalized polyester or equivalent Parts List Servicing should be referred to qualified personnel A list of major parts has been included for convenience S c h e m a t i c R e f e r e n c e N u m b e r J B L Part N u m b e r D e s c r i p t i o n 5231 5232 T R A N S F O R M E R T301 T301 51325 Power Transformer D I O D E S CR401 402 403 404 CR405 406 CR401 402 403 404 CR405 406...

Страница 10: ...DC output voltages for each integrated circuit which should measure 0 Vi VDC If this specification is not met the integrated circuit is defective and should be replaced DC voltages are measured with respect to ground It should be noted that a DC voltmeter having a high input impedance 10 megohms or greater is recommended 8 ...

Страница 11: ...ividing Network T h e s c h e m a t i c of the 5231 is i d e n t i c a l w i t h e x c e p t i o n of t h e r e f e r e n c e d e s i g n a t i o n s R201 etc T h e a p p r o p r i a t e s c h e m a t i c is p a c k e d w i t h the units c o n c e r n e d FREQ SELECT ...

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