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E 250P (serv.man15) - JBL Audio Service Manual (repair manual). Page 12

Read JBL E 250P (serv.man15) Service Manual online

Block Diagram 
Rin
Lin
Rout
Lout
Line Level
Input
DIF. AMP
SUMMI NG AMP
VOLUME CTRL
PHASE CTRL
   SWITCH
AMP   STAGE
12dB/Octave
HPF
LPF
12dB/Octave
12dB/Octave
LPF
Variable
SUMMI NG AMP
LIMITER  / 
LPF
MUTE
 DC OFFSET
PROTECTION
   THERMAL
PROTECTION
   CURRENT
PROTECTION
       
LINEAR
POWER SUPPLY
* FUSE
MUTE
SIGNAL SENSE
          
ATO
SIGNAL SENEING
EXTERNAL LED INDICATORS
CONTROLLED
 REGULATOR
  CLASS  D
 AMPLIFIER
+15V SW
MUTE
 OUTPUT-RELAY
5.6 OHMS
LFE
NORMAL
NOTE : 
120 VAC T2A-250V
230 VAC T1.25A-250V
SPEAKER LEVEL
        
INPUT
F
1
E
D
3
2
C
B
A
1
2
3
4
7
6
8
F
E
D
5
RevNo
Revision note
6
7
C
B
Checked
8
Date
Signature
A
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