DOWNLOAD JBL ES250PW (serv.man2) Service Manual ↓ Size: 3.77 MB | Pages: 56 in PDF or view online for FREE

Model
ES250PW (serv.man2)
Pages
56
Size
3.77 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
es250pw-sm2.pdf
Date
PREV: JBL ES250PW Service Manual

JBL ES250PW (serv.man2) Service Manual ▷ View online

 
Sweep Function 
 
1)  Follow steps 9-14 above, using a sweep generator as a signal source. 
2)  Sweep generator from 20Hz to 300Hz. Listen to the cabinet and drivers for any rattles, clicks, buzzes or 
any other noises. If any unusual noises are heard, remove woofer and test. 
 
Driver Function 
 
1)  Remove woofer from cabinet; detach + and - wire clips. 
2)  Check DC resistance of woofer; it should be 3.6 ohms ±10% 
3)  Connect a pair of speaker cables to driver terminals. Cables should be connected to an integrated amplifier 
fed by a signal generator. Turn on generator and adjust so that speaker level output is 5.0V. 
4)  Sweep generator from 20Hz to 1kHz. Listen to driver for any rubbing, buzzing, or other unusual noises. 
 
 ES250PW 
 
 
 
 
 
 
 
 
 
 
 
   
      
 
 
 
12
-15V
GND
GND
+15V
mute
mute
+15V
-15V
Power regulator 
circuit
Class_d
Amp model
Relay
To speaker
protection
12.288MHz
Crossover
control
U102
signal input
Ac in
signal input
protection
Power  amp PCB
Wireless PCB
Pre amp PCB
 
 ES250PW 
 
 
 
 
 
 
 
 
 
 
 
   
      
 
 
 
13
 
 
ES250PW Testing Flow Chart
 
                                                                                                                                         
 yes 
                                             
 
                                                                                                                                                 
       
 
 
no 
                                   
                                            no 
yes 
               
 
     
                                    yes                                                                                                               
 no 
       
                     
yes 
 
                                            no 
 
                                                                                                                                               
                                  yes                                                                                                               
 no 
 
       
yes 
       
 
                                            no 
                                             
                                     
 yes 
no 
 
 
 
 
 yes 
                                                                                                                                               
                                              no 
 
                         
no 
                                   
 yes 
 yes 
 
       
no 
                                                                                                     
 
 
                       
   
Start 
Dc voltage check 
±Vcc,±15V 
OK 
Check transformer 
C
168,
C
169
,D
123
, 
D
124,
C
170
 
Power on check   
LED red &green 
OK 
Check vol module 
& connector 
cable& ±15V.etc 
Check THD output 
power, noise 
OK 
Check pre board    
& power board , 
±Vcc,±15V ect 
Test frequency 
Response 
OK 
Check U
102
,uR
133
, 
C
121,
R
135
,C
122
.ect 
Test input sensitivity 
OK 
Check U
101
,R
117,
 
R
112,
R
114
 etc 
Test protection 
OK
Check U
107
.R
237
 
±15Vcc etc 
Test limiter circuit 
OK
Check U
106
.Q
107
ect
 
Auto off Function 
Hi pot test 
OK
Check U
103
.Q
101. 
Q
102
.C
131.
R
142
;AC 
cord, Transformer. 
OK
Listening test   
OK
The Amp ass’y  ok 
END 
Test frequency 
Response 
Check U105 
C137C137CC143ect 
 
 ES250PW 
 
 
 
 
 
 
 
 
 
 
 
   
      
 
 
 
14
 
 
 
Transmitter 
Troubleshooting Flow Chart 
 
 
 
 no 
 yes 
 
                       
 
  
yes 
 
 yes 
no 
 
 
 
 
 
           
 
 
   
yes 
                              yes 
 no 
     
 
  
yes 
 
  
red 
 
 
 
 
 
LED light green
 yes 
 
  
no 
 
 
 
 
 
 
 
                    yes 
yes 
   
  
 
no 
 
 
     
   
 
  
yes 
 
 
 
 
     
 
     
 
 
 
 
 
   
 
 
 
 
   
 
 
 
AMP no signal out 
check +VD(17VDC) 
Check+VA(15VDC) 
Check+12VDC +3.6VDC
 
Check,D1,L01,D05,Q04,D0
3,Q03,Q01,Q02 etc 
OK, END 
Check MD01WH4924 
 
Check Q06,Q05 etc 
Check,Q07,D08 .U01,D10,U02etc 
LED light green or red
 
Check,U05,U06,U08,Q11
,Q12,U03,U04 etc
 
Check LAUNCHER
 signal 
Check MD01 AINL,AINR 
signal
 
CheckU07,U05,U06 etc
 
 ES250PW 
 
 
 
 
 
 
 
 
 
 
 
   
      
 
 
 
15
Page of 56
Display

Click on the first or last page to see other ES250PW (serv.man2) service manuals if exist.

RANDOM: