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Media Sub
TECHNICAL MANUAL
Single 5.25" Powered Multimedia Subwoofer
JBL Consumer Products Inc.
250 Crossways Park Dr.
Woodbury,N.Y.11797
1-800-336-4JBL in the USA
A Harman International Company
Rev B 4/02
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Powered Subwoofer Media Sub
TABLE OF CONTENTS
FEATURES.....................................................................1
SPECIFICATIONS..........................................................1
MEDIA SUB EXPLODED VIEW ...................................2
DISASSEMBLY PROCEDURES ...................................3
BLOCK DIAGRAM .........................................................4
PCB1&2(viewing trace layer through the board) .....5
PCB1&2(viewing silk-screen through the board) .....6
FEATURES
Powered subwoofer system.
n
25 watt amplifier.
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Auto turn-on / turn-off circuitry.
n
Subwoofer is magnetically shielded for flicker-free use
n
near computer monitors.
PCB 3 (viewing trace layer through the board) ............7
PCB 3 (viewing silk-screen through the board) ............8
ELECTRICAL PARTS LIST ...........................................9
PACKAGINGEXPLODEDVIEW.................................11
INTEGRATEDCIRCUITDIAGRAMS..........................12
SCHEMATICDIAGRAM..............................................13
Built-in electronic equalization for proper frequency
n
balance with satellite speakers.
Line level stereo output for use with satellite speakers
n
that don’t have a subwoofer output.
SPECIFICATIONS
Speaker System...........Sixth band-pass enclosure
Speaker Size............5.25” woofer
Total Amplifier Output Power ......25Wat10%THD
Input Sensitivity ...........250mV input for full power
Frequency Response .........40Hz - 150Hz
Input Impedance ..........10kohms
Signal Output jack ..........Stereominiplug jack (1/8")
Signal Input Jacks ..........Stereominiplug jack (1/8")
External Dimensions
Height ..............10.25"
Width ..............7.35"
Depth..............12"
Weight ..............12.8 lbs.
External Dimensions (metric)
Height ..............260mm
Width ..............186mm
Depth..............305mm
Weight ..............5.8kgs
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MEDIA SUB EXPLODED VIEW
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Powered Subwoofer Media Sub
DISASSEMBLY PROCEDURES
Step 1
Remove the 8 purchase screws (S6) from the rear plate to separate the rear plate and the wood cabinet.
Step 2
Unplug the connector speaker wire from the PCB amp assembly.
Step 3
Remove the 4 purchase screws (S5) from the rear plate to separate the rear plate and cover.
Step 4
Remove the power/volume knob from the rear plate.
Step 5
Remove the 4 purchase screws (S2) and nuts (N1) to separate the rear plate and transformer assembly.
Step 6
Remove the 2 purchase screws (S3) from the bracket and the 2 purchase screws (S4) and nuts (N2) from
the IC of STK4024 to separate the rear plate and Amp assembly.
Step 7
Remove the 4 purchase screws (S1) from the driver inside the wood cabinet to separate the wood cabinet
and the driver.
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BLOCK DIAGRAM
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Powered Subwoofer Media Sub
PRINTED CIRCUIT BOARDS1&2(viewing trace layer through the board)
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Powered Subwoofer Media Sub
PRINTED CIRCUIT BOARDS1&2(viewing silk-screen through the board)
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Powered Subwoofer Media Sub
PRINTED CIRCUIT BOARD 3 (viewing trace layer through the board)
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Powered Subwoofer Media Sub
PRINTED CIRCUIT BOARD 3 (viewing silk-screen through the board)
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Powered Subwoofer Media Sub
MEDIA SUB ELECTRICAL PARTS LIST
Part Number Description Qty Reference Designator
Resistors
QAF0250-331 RESISTOR 330 OHM 1/2W 5% CF 1 R136
QAF0250-479 RESISTOR 4.7 OHM 1/2W 5% CF 1 R137
QAF0450-100 RESISTOR 10 OHM 1/4W 5% CF 1 R146
QAF0450-101 RESISTOR 100 OHM 1/4W 5% CF 2 R132 R134
QAF0650-102 RESISTOR 10K OHM 1/6W 5% CF 2 R115 R124
QAF0650-103 RESISTOR 10K OHM 1/6W 5% CF 17 R101 R102 R105 R106 R108 R109 R122 R123
R125 R128 R133 R138 R139 R140 R153 R160
R161
QAF0650-104 RESISTOR 100K OHM 1/6W 5% CF 1 R117
QAF0650-105 RESISTOR 1.0M OHM 1/6W 5% CF 1 R114
QAF0650-152 RESISTOR 1.5K OHM 1/6W 5% CF 3 R126 R147 R149
QAF0650-183 RESISTOR 18K OHM 1/6W 5% CF 4 R110 R111 R112 R113
QAF0650-223 RESISTOR 22K OHM 1/6W 5% CF 2 R151 R162
QAF0650-224 RESISTOR 220K OHM 1/6W 5% CF 1 R120
QAF0650-304 RESISTOR 300K OHM 1/6W 5% CF 1 R158
QAF0650-330 RESISTOR 33 OHM 1/6W 5% CF 1 R127
QAF0650-332 RESISTOR 3.3K OHM 1/6W 5% CF 1 R148
QAF0650-334 RESISTOR 330K OHM 1/6W 5% CF 2 R119 R159
QAF0650-392 RESISTOR 3.9K OHM 1/6W 5% CF 1 R154
QAF0650-393 RESISTOR 39K OHM 1/6W 5% CF 1 R107
QAF0650-394 RESISTOR 390K OHM 1/6W 5% CF 1 R116
QAF0650-472 RESISTOR 4.7K OHM 1/6W 5% CF 1 R156
QAF0650-562 RESISTOR 5.6K OHM 1/6W 5% CF 2 R129 R150
QAF0650-563 RESISTOR 56K OHM 1/6W 5% CF 2 R130 R135
QAF0650-682 RESISTOR 6.8K OHM 1/6W 5% CF 1 R152
QAF0650-821 RESISTOR 820 OHM 1/6W 5% CF 1 R131
QAF0650-824 RESISTOR 820K OHM 1/6W 5% CF 1 R121
QAF0650-103 RESISTOR 10K OHM 1/6W 5% CF 2 R103 R104
Capacitors
PRD1335-220 COND DISC 22 pF 50V 5% 1 C124
PRD3545-101 COND DISC 100 pF 50V 10% Y5P 3 C102 C118 C122
PRD3545-102 COND DISC 1000 pF 50V 10% Y5P 1 C121
PRD3545-104 COND DISC 0.1 uF 50V 10% Y5P 2 C155 C156
PRD3545-331 COND DISC 330 pF 50V 10% Y5P 1 C115
PRD3545-471 COND DISC 470 pF 50V 10% Y5P 1 C114
PRD4965-203 COND DISC 0.02 uF 50V +80-20% 3 C152 C153 C154
PRE3951-101 COND ELECT 100 uF 10V 20% 85'C 2 C103 C116
PRE3951-221 COND ELECT 220 uF 10V 20% 85'C 1 C111
PRE3952-100 COND ELECT 10 uF 16V 20% 85'C 1 C110
PRE3952-101 COND ELECT 100 uF 16V 20% 85'C 2 C112 C128
PRE3952-221 COND ELECT 220 uF 16V 20% 85'C 1 C132
PRE3954-100 COND ELECT 10 uF 35V 20% 85'C 2 C123 C129
PRE3954-221 COND ELECT 220 uF 35V 20% 85'C 2 C117 C120
PRE3955-109 COND ELECT 1 uF 50V 20% 85'C 3 C113 C119 C133
PRE3955-478 COND ELECT 0.47 uF 50V 20% 85'C 1 C108
PRE3955-479 COND ELECT 4.7 uF 50V 20% 85'C 1 C101
PRM3737-104 COND MYLAR 0.1 uF 100V 5% 1 C157
PRM3737-152 COND MYLAR 0.0015uF 100V 5% 1 C158
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Powered Subwoofer Media Sub
Part Number Description Qty Reference Designator
PRM3737-273 COND MYLAR 0.027 uF 100V 5% 4 C104 C105 C106 C107
PRM3747-104 COND MYLAR 0.1 uF 100V 10% 1 C126
PRD3545-101 COND DISC 100 pF 50V 10% Y5P 2 C150 C151
PVE3954-332 COND ELECT 3300 uF 35V 20% 2 C130 C131
Semiconductors
RAD4001-001 RECTIFIER 1N4001 1A 35VRMS 1 D103
RAD4148-001 DIODE SW 1N4148 3 D101 D102 D104
RAZ0859-070 DIODE ZENR 5.6-5.9V 0.5W HITACHI HZ6B-2 1 ZD102
RAZ0859-081 DIODE ZENR 11.9-12.4V 0.5W HITACHI HZ12A-2 1 ZD101
RAN0945-001 XISTR NPN 2SC945P NEC 6 Q101 Q102 Q103 Q106 Q107 Q108
RHD0202-001 RECTIFIER BRIDGE RS202L 1 BD101
RHI0740-001 IC 14 PIN TL074CN SGS QUAD OP-AMP 1 IC101
RHI4032-001 IC 15 PIN STK4032II SANYO 40W POWER AMP 1 IC103
RHI4558-001 IC 8 PIN JRC4558D JRC DUAL OP-AMP 1 IC102
Miscellaneous/Mechanical
APE0083-A33 CNTL SW AY CNTL JACK PCB ASSY
CCN1500-035 CONNECTOR B10B-XH-A 10 PIN PST BSE TOP P=2.5 RB102A
CCN3962-002 CONNECTOR 2 PIN CL3962WVO PST BSE TOP P=3.96 CN501
MRL2212-003 RELAY OJE-SS-112DM 12V DC 37.5 mA RL101
CFC2557-001 FUSE CLIP DIA5xL20mm FUSE F101
20565-120BB WIRE 22 GA 120 mm BLACK 4-4 UL 1007 P104A TO P104B
20565-122BB WIRE 22 GA 120 mm RED 4-4 UL 1007 P103A TO P103B, P105A TO P105B
XHP0001-001 L PIN P106 P107
APE0083-B33 CNTL SW AY CNTL JACK PCB ASSY
CJM9380-028 PHONE JACK D3.5 JY3542-01-030 JK101 JK102
DSS0545-003 HOUSING LED HOUSING LEK2-4.5 5 DIA H=4.5 mm LD001
KEM0001-001 LED 5 DIA RED/GREEN LD001
MRR0103-001 CNTL ROTRY 10K OHM B SIGNAL WITH SWITCH ON/OFF
5003A2501B0 COND WIRE 10 COND 250 mm RB102B TO RB102A
APE0083-C22 X'FORM PCB X'FORM PCB ASSY 100V E035-1X (HI)
APE0083-C33 CNTL SW AY CNTL JACK PCB ASSY
GSE0073-001 BRACKET PCB BRACKET PCB-BRACKET
H120301-308 SCREW T3.0x0.5pxL8.0 mm PAN HEAD BLACK PCB TO BRACKET
BPA0013-000 COVER
BPK5027-000 VOL. KNOB E-035 (JBL)
DBU0002-001 BUSHING AC LINE BUSHING PIN GOOD 4RF-5 AC CORD BUSHING
GAL0032-001 REAR PLATE AC 120V~60Hz
H021401-312 SCREW M3.5xP1.4xL12 mm PAN HEAD BLACK REAR TO COVER
H060404-310 SCREW M3.5xP0.6xL10 mm BLACK WAFER HEAD REAR COVER TO TRANFORMER-4
H060404-321 SCREW M3.5xP0.6xL21 mm BLACK WAFER HEAD REAR TO IC-2
H120301-308 SCREW T3.0x0.5pxL8.0 mm PAN HEAD BLACK REAR TO BRACKET
HNI1482 K-NUT #6-32 NICKEL WITH TOOTH WASHER TRANSFORMER-6
IVE0025-001 SPONGE 85x65mm COVER
IVE0027-001 SPONGE L185xW8xT2mm COVER-1, BETWEEN REAR PLATE AND AC
CORD-0.5
IVE0083-001 SPONGE L82xW37xT4mm TRANSFORMER AREA
IVS0003-001 SPONGE L60xW10xT1mm VOLUME PCB-1
IVS0004-002 FELT L20xW10xT0.9mm VR PCB TO COVER SLOT-4
KSA2100-002 FUSE 1A 250V SLOW 5x20mm UL/CSA/T-MARK F101
TTH1200-112 PWR TRANS EI-66 120V 20W
47455-D52 LINE CORD SPT-2 1980mm POL BLK-UL DBLE INS
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Powered Subwoofer Media Sub
INTEGRATED CIRCUIT DIAGRAMS
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POWERED SUBWOOFER
Media Sub
Media Sub Schematic Diagram
IHGFEDCBA LMN0
J
1
K
Test voltages are printed in orange.
Operational Mode
P
1
voltages are
displayed in boxes. Other voltages
shown are for due
+22.2V
-21.8V -21.7V
-1.35V
-1.2V -1.27V
-1.3V
+22.4V
STK4024 II
-22.4V
-1.3V
-1.34V
IC103
-22.6V
0.0V
0.0V
2
5.6V
5.6V
5.6V
5.6V
0.0V
5.6V
0.0V
5.6V
5.61V
5.6V
5.6V
5.6V
5.6V
5.6V
3
5.6V
5.6V
4
5.6V
5.6V
12.1V
12.1V
5.6V
5.6V
5.6V
5.6V
0.0V
0.0V
0.0V
0.0V
0.0V
0.0V
-20.1V
+20.1V
+20.4V
-22V
5
-13.5V
6
6.3V 7.25V
5.9V
6.10V
7
4.8V
1.36V
12.1V
12.1V
+22.3V
-22.4V
17.7V
AC
to the Auto On/Off function.
+21.9V
+0.5V
Stand-by Mode
2
3
4
5
6
7
+11.0V
8
0V
2.47V
2.48V
0.47V
7.14V
1.3V
9
J
K
LMABCDE FGH I
17.7V
AC
8
9
N
0
P
13
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POWERED SUBWOOFER
14
1
Media Sub Schemati
IHGFEDCBA
2
5.6V
5.6V
5.6V
5.6V
5.6V
5.6V
0.0V
0.0V
5.61V
5.6V
5.6V
5.6V
5.6V
5.6V
3
5.6V
5.6V
5.6V
5.6V
4
5.6V
5.6V
12.1V
12.1V
5.6V
5.6V
5
6
6.3V 7.25V
5.9V
6.10V
4.8V
1.36V
12.1V
12.1V
7
+11.0V
8
0V
2.47V
2.48V
0.47V
7.14V
1.3V
9
AB CDEFGH I
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Schematic Diagram
Media Sub
15
ILMN0
J
K
P
Test voltages are printed in orange.
Operational Mode
voltages are
displayed in boxes. Other voltages
0.0V
0.0V
0.0V
0.0V
0.0V
0.0V
-20.1V
+20.1V
-21.8V -21.7V
+20.4V
-22V
-1.3V
-1.35V
-1.2V -1.27V
+22.2V
+22.4V
STK4024 II
-22.4V
-1.3V
-1.34V
IC103
-22.6V
shown are for due
to the Auto On/Off function.
0.0V
0.0V
+21.9V
+0.5V
Stand-by Mode
1
2
3
4
-13.5V
+22.3V
-22.4V
17.7V
17.7V
5
6
AC
7
AC
8
9
J
K
LMI
N
0
P
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