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

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

 
  
ES Series  
ES250PW 
Wireless Powered Subwoofer 
 
Service Manual 
 
 
 
JBL Consumer Products 
250 Crossways Park Dr. 
            Woodbury, New York   11797 
 
 
 
Released 
2008          Rev2 3/2009 
Discontinued XXXX 
 
 
 
 
-  CONTENTS  - 
 
 
BASIC SPECIFICATIONS …………….……..…………..1 
DETAILED SPECIFICATIONS ……….……..…………..2 
PACKAGING……..……………….………….….….….....5 
CONTROLS/CONNECTIONS………………..…...…..…6  
OPERATION ……..………………….……...…….….…...8 
SUBWOOFER EXPLODED VIEW/PARTS LIST……....9 
TRANSMITTER EXPLODED VIEW/PARTS LIST…....10 
TEST SET-UP AND PROCEDURE…..….……………..11 
AMPLIFIER BLOCK DIAGRAM…….………….……..…13 
SUBWOOFER AMP TROUBLESHOOTING……. ……14 
TRANSMITTER TROUBLESHOOTING……. …………15 
RECEIVER PCB TROUBLESHOOTING…….….. ……16 
P.C.B. DRAWINGS….…………………………………….17 
ELECTRICAL PARTS LIST ..……….……….……….…24 
IC/TRANSISTOR PINOUTS..……..….…….….….….….30 
SCHEMATICS…………………………………………….44 
 
ES250PW SPECIFICATIONS 
 
Amplifier Power (RMS):    
 
400 Watts 
Peak Dynamic Power *:    
 
700 Watts 
Driver: 
     12" 
(305mm) 
PolyPlas™ 
Inputs:  
 
 
 
 
Line Level or LFE  
Low-Pass Frequency:  
 
 
Variable from 50Hz to 150Hz  (24dB/octave) 
Frequency Response:  
 
 
25Hz – 150Hz 
Operating Range    
 
 
Up to 75' (22m), depending upon conditions  
RF Operating Frequency    
 
2.4GHz 
Subwoofer Dimensions (H x W x D):  
19-3/4" x 15-3/4" x 17-7/8"  (502mm x 400mm x 454mm) 
Transmitter Dimensions (H x W x D):   3-3/4" x 4-7/8" x 3-15/16"  (95mm x 124mm x 100mm) 
Weight: 
 
    43 
lb/19.5kg 
 
JBL continually strives to update and improve existing products, as well as create new ones. The specifications 
and details in this and related JBL publications are therefore subject to change without notice. 
 
The Peak Dynamic Power is measured by recording the highest center-to-peak voltage measured across the output of a resistive load equal to 
minimum impedance of the transducer, using a 50Hz sine wave burst, 3 cycles on, 17 cycles off.
 
1
 
 ES250PW 
 
 
 
 
 
 
 
 
 
 
 
   
      
 
 
 
ES250PW
250W Powered Sub Amp 
LINE VOLTAGE
Yes/No
Hi/Lo Line
Nom.
Unit
Notes
US 120vac/60Hz
Yes
108-132
120
Vrms
Normal Operation
EU 230vac/50-60Hz
Yes
207-253
230
Vrms
Normal operation, MOMS required
Parameter
Specification
Unit
QA Test 
Limits
Conditions
Notes
Amp Section
Type (Class AB, D, other)
D
n/a
n/a
Load Impedance (speaker)
4
Ohms
n/a
Nominal
AVG System impedance
7.25
Ohms
n/a
AP Computed BW 20 to 500Hz
Min System impedance
4.385
Ohms
n/a
@ 92Hz
Rated Output Power (120VAC)
250
Watts
240
Domestic version only  120 VAC-60 Hz
AVG RMS  Dynamic Power
336
Watts
Reference 200mV driven into LFE input
Average RMS power,  3/20 Cycles 50 Hz, 
Driven 6dB above its input sensitivity , 
average of the RMS value for the first 4 
consecutive peaks
THD @ Rated Power
0.5
%
1
22K filter
THD @ 1 Watt
0.2
%
0.3
22K filter
DC Offset
10
mV-DC
30
@ Speaker Outputs
Damping factor
>50
DF
20
Measured at amplifier board  90% 
of full power
Measured at the speaker cable.  225 Watts @ 
THD < 0.1 % @ 50 Hz
Input Sensitivity
Input Frequency
50
Hz
50
Nominal Freq.
L or R
13
mVrms
±1dB
To 1 Watt, AP Zo=600
Single input driven, either L or R
LFE input
7
mVrms
±1dB
To 1 Watt, AP Zo=600
LFE input driven only. 
System Gain (L or R inputs)
43.7
dB
Reference
Single input driven L or R inputs (Local inputs)
System Gain (LFE input)
49.1
dB
Reference
Single input driven LFE, local input
Signal to Noise
SNR-A-Weighted
80
dBA
75
relative to 1W
A-Weighting filter
SNR-unweighted
65
dBr
60
relative to 1W
22K filter
Residual Noise Floor
<1.5
mVrms(max)
2.5
Volume @max, w/ A/P Swept 
Bandpass Measurement (Line 
freq.+ harmonics) (BW=20 KHz)
Line level inputs must be terminated using    
1KOHM
Input Impedance
Line Input (L, R,LFE)
10K
ohms
n/a
Nominal
Filters
LP filter Variable (Normal mode)
50-150
Hz
± 10
4th Order variable-24 db/Octave
Subsonic filter (HPF) 2nd Order
Fixed
Friend circuit
Fixed
LFE Low pass 
200>LP<500
Hz
LFE input driven only
Limiter 
THD at Max. Output Power
5
%
functional 
Drive unit 6dB above the required 
level to obtain full power 
Approximately 800mV single input 
driven, L or R input
Maximum THD as a result of limiting.
Features
--
Volume pot Taper (lin/log)
LOG
--
functional 
A Taper
Phase switch 
0-180
deg
functional 
LP Filter defeat switch
YES
functional 
Disables LP filter, Wireless mode only, it has 
no effect when using local inputs 
Wireless ready
YES
functional 
Refer to Wireless section below
Wireless channels
4
n/a
functional 
System is provided with 4 wireless channels, 
which can be selected via a rear panel switch, 
channel should match ID at Tx side
LED Indicator
YES
functional 
RED-Standby, GRN-Active, ORG-Wireless 
link and subwoofer are active. 
Input Configuration
Line in  (L,R) & LFE
YES
--
functional 
3 RCA Jacks, RED, WHT (Left and Right) and 
Purple for LFE
Signal Sensing (ATO)
Auto-Turn-On (yes/no)
YES
functional 
ATO Input test frequency
50
Hz
functional 
ATO Line level input
1.5
mV
functional 
Maximum acceptable level.
 
 ES250PW 
 
 
 
 
 
 
 
 
 
 
 
   
      
 
 
 
2
Parameter
Specification
Unit
QA Test 
Limits
Conditions
Notes
ATO Turn-on time
5
ms
functional  Amp connected and AC on, then 
input signal applied
Auto Mute/ Turn-OFF Time
5-15
minutes
5-15
T before muting, after signal is 
removed
Auto turn of time (T)   must be  5 > T < 15 
Minutes
Power on Delay time
3
sec.
4
AC Power Applied
Transients/Pops
ATO Transient
0.5
V-peak
0.5V
@ Speaker Output
Amplifier activated by signal presence at the 
Line input
Turn-on Transient
0.5
V-peak
0.8V
@ Speaker Output
AC Line cycled from OFF to ON
Turn-off Transient
0.5
V-peak
0.8V
@ Speaker Output
AC Line cycled from ON to OFF
Efficiency
Efficiency
65
%
62
Test conducted at rated power 
200W
Nominal Line voltage 
Efficiency 1/8 of rated power
48
%
45
Test conducted at 31.25 WRMS
Nominal Line voltage-Rated impedance 4 
Ohms
Input Power 1/8 of rated power
61
Watts
69.4
Test conducted at 31.25 WRMS
"
Input current 1/8 of rated power
0.75
Amperes
Reference Test conducted at 31.25 WRMS
"
Standby Input power
15
Watts
16
Nominal Line voltage  RED LED
Idle input power
14
Watts
16
@ nom. line voltage
Maximum allowable  input power under 
nominal  Input voltage and frequency, HOT or 
COLD operation. LED GREEN no signal 
applied
Power Cons. @ rated power
303
Watts
331
@ nom. line voltage
200 Watts @ 4 Ohms nominal line voltage
Protections
Short Circuit Protection 
YES
functional  Direct short at output
Amplifier should resume operation after short 
circuit condition removal 
Thermal Protection 
YES
functional @1/8 max unclipped Power at 
1.06 times the input voltage
Temperature rise in accessible metal parts 
should not exceed 35K rise for domestic 
(refer to requirements sheet).
DC Offset Protection
YES
-
DC present at Speaker Out leads
Design must insure no Offset/DC Voltage at 
the speaker output  under any operating 
condition including abnormal operation
Line Fuse Rating
USA-Domestic 
3.15
Amps
3.15
Type-T or Slo Blo-250 V
EU
2
Amps
2
Type-T or Slo Blo-250 V, Low 
Breaking capacity
SYSTEM PERFORMANCE USING WIRELESS TRANSMITTER (Tx )
THD @ 1 Watt
0.43
%
0.5
22K filter
Tx Input Impedance
Line Input (LFE)
7.3K
ohms
n/a
Nominal @ 1KHz
System Sensitivity
Using Tx
Input Frequency
50
Hz
50
Nominal Freq.
System level, using Tx
LFE Input
6.5
mVrms
±1dB
To 1 Watt
System level, using Tx
System gain
50
dB
±1dB
To 1 Watt
System level, using Tx
System Signal to Noise
Using Tx
SNR-A-Weighted
75
dBA
70
relative to 1W
A-Weighting filter
SNR-unweighted
55
dBr
55
relative to 1W
22K filter
Tx Filters
System filter
None
Hz
Should not have any effect on the 
FR of the system
Refer to AP Graph
Tx Input Limiter dynamic 
range
Maximum input voltage the Tx 
line input can take without 
exceeding 1% of THD at the 
output of the sub amp
5.7
Vrms
functional 
Max input voltage Tx front end can handle 
without exceeding 1% THD
Tx-Signal Sensing (ATO)
Auto-Turn-On (yes/no)
YES
functional 
ATO Input test frequency
50
Hz
functional 
ATO Level LFE Input
2
mV
functional 
 
 ES250PW 
 
 
 
 
 
 
 
 
 
 
 
   
      
 
 
 
3
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JBL ES250PW (serv.man2) Service Manual ▷ Download

  • DOWNLOAD JBL ES250PW (serv.man2) Service Manual ↓ Size: 3.77 MB | Pages: 56 in PDF or view online for FREE
  • Here you can View online or download the Service Manual for the JBL ES250PW (serv.man2) in PDF for free, which will help you to disassemble, recover, fix and repair JBL ES250PW (serv.man2) Audio. Information contained in JBL ES250PW (serv.man2) Service Manual (repair manual) includes:
  • Disassembly, troubleshooting, maintenance, adjustment, installation and setup instructions.
  • Schematics, Circuit, Wiring and Block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Exploded View and Parts List.