Page 1
Media 2
TECHNICAL MANUAL
2-way 3" Powered Multimedia Speaker System
JBL Consumer Products Inc.
80 Crossways Park West
Woodbury, N.Y. 11797
1-800-336-4JBL in the USA
A Harman International Company
Part No.: MEDIA2SM Rev A
Page 2
Two-Way Speaker System Media 2
TABLE OF CONTENTS
Features..........................................................................1
Specifications .................................................................1
Disassembly Procedures................................................2
Trouble Shooting ............................................................2
Block Diagram ................................................................3
Master Speaker Exploded View (With Amplifier) ..........4
Two-way speaker system.
n
10-watt stereo amplifier.
n
Auto turn-on/turn-off circuitry.
n
Speakers are magnetically shielded for flicker-free use
n
alongside computer monitors.
Slave Speaker Exploded View (Without Amplifier) .......5
Printed Circuit Boards ....................................................6
Electrical Parts List ........................................................7
Packaging Exploded View .............................................8
Integrated Circuits ..........................................................9
Media 2 Schematic Diagram........................................10
FEATURES
For use with both Mac and PC-based computer systems.
n
Built-in electronic equalization for smooth frequency
n
response.
Variable bass contour control.
n
n Subwoofer output.
SPECIFICATIONS
Speaker System Full Range: ......Two-Way Speaker System
Speaker Size: ...........3"Woofer, 1.5" Tweeter
Total Amplifier Output Power: ......10Wat10%THD
Frequency Response: .........100Hz - 20kHz
Input Impedance: ..........50Kohms
Subwoofer Output Jack: ........Stereo mini plug (1/8")
Signal Input Jacks: ..........Stereo mini plug (1/8")
External Dimensions:
Height ..............11.5" (292mm)
Width ..............3.75" (95mm)
Depth ..............6"(152mm)
Weight:..............4lbsperpair
1
Page 3
Two-Way Speaker System Media 2
DISASSEMBLY PROCEDURES
Step 1. Unscrew (#14) from Rear Case (#2) and remove
Rear Case (#2)
Step 2. Unscrew 4 screws (#15) from bottom of “Down
Case” (#4) and lift “Up Case” (#3 for the Slave Speaker
or #21 for the Master Speaker) off of “Down Case”.
TROUBLE SHOOTING
1. If the power LED Fails
A. Check if the accessory adaptor is properly fitted.
B. Check if the adaptor is plugged into the D.C. Jack.
2. No sound from the Master Speaker
A. Check if the adaptor is plugged into the input jack and
audio signal is lighted.
B. Check if the power switch is on.
C. Check to see if the volume knob is turned up half-way.
3. No sound from the Slave Speaker
A. Check to see if it is well connected to the Master
Speaker.
To separate the “Front Case” (#1 for the Slave Speaker
or #20 for the Master Speaker) from the “Down Case”
(#4), pinch interior clip of “Axis Covers” (#6) and force out
of hole. These should snap out.
4. The power signal is RED
(normally it should be GREEN)
A. Check if the adaptor is plugged into the jack.
5. No volume
A. Check to see if both the treble and bass knobs are
turned up half-way.
6. Distortion
A. Check if input jack 1 and input jack 2 are both
connected.
2
Page 4
Two-Way Speaker System Media 2
BLOCK DIAGRAM
3
Page 5
Two-Way Speaker System Media 2
MASTER SPEAKER EXPLODED VIEW (with Amplifier)
4
Page 6
Two-Way Speaker System Media 2
SLAVE SPEAKER EXPLODED VIEW (without Amplifier)
5
Page 7
Two-Way Speaker System Media 2
PRINTED CIRCUIT BOARDS
6
Page 8
Two-Way Speaker System Media 2
ELECTRICAL PARTS LIST
REF. NO. PART NO. DESCRIPTION QTY
Transistors
Q101, 102 1020945161 2SC945P 4
103, 104
Diode
D101, 102 125200032 IN4148 2
Diode (Zener)
ZD101, 102 1253000022 1/2W 9.1V (MTZ9.1B) 2
Diode (LED)
LD101 1257000041 2x5 m/m RED/GREEN 1
Integrated Circuits
U101, 103 1281000021 TLO74CN OP AMP 2
U102 1281000031 LA4700 POWER AMP 1
Resistor (Carbon)
R101, 102, 103, 1312033361 1/4W 33 KΩ ±5% 4
104
R105, 106 1312056361 1/4W 56 KΩ ±5% 2
R107, 108 1312012361 1/4W 12 KΩ ±5% 2
R109, 110, 111 1312010361 1/4W 10 KΩ ±5% 11
112, 123, 124,
130, 148, 149,
153, 156
R113, 114, 115, 1312027261 1/4W 2.7 KΩ ±5% 4
116
R117, 118 1312015161 1/4W 150 Ω ±5% 2
R119, 120, 121 1312010161 1/4W 100Ω ±5% 5
122, 134
R125, 126, 127, 1312022961 1/4W 2.2 Ω ±5% 4
128
R129, 150 1312022361 1/4W 22 KΩ ±5% 2
R131 1312033061 1/4W 33 Ω ±5% 1
R132 1312010061 1/4W 10Ω ±5% 1
R133 1312015261 1/4W 1.5 KΩ ±5% 1
R135, 136, 137, 1312010461 1/4W 100 KΩ ±5% 5
138, 147
R139 1312015461 1/4W 150 KΩ ±5% 1
R140, 141 1312022261 1/4W 2.2 KΩ ±5% 2
R142 1312018561 1/4W 1.8 KΩ ±5% 1
R143 1312018461 1/4W 180 KΩ ±5% 1
R144, 152 1312033161 1/4W 330 Ω ±5% 2
R145 1312039461 1/4W 390 KΩ ±5% 1
R146 1312082461 1/4W 820 KΩ ±5% 1
R151 1312068261 1/4W 6.8 Ω ±5% 1
R154 1312010261 1/4W 1 KΩ ±5% 1
R155 1312068161 1/4W 680 Ω ±5% 1
REF. NO. PART NO. DESCRIPTION QTY
C130 1544228111 25V 2200 µF85°C ±20% 1
C131 1546475112 50V 0.47 µF85°C ±20% 1
C134, 138 1546106112 50V 10 µF85°C ±20% 2
C135, 136 1542227112 10V 220 µF85°C ±20% 2
Capasitors (Polyester)
C107, 108, 109, 1631683420 50V 0.0068 µF ±10% 4
110
C115, 116 1631472420 50V 0.0047 µF ±10% 2
C123, 124, 125 1631104420 50V 0.1 µF ±10% 4
126
Capasitors (Ceramic)
C105, 106 1723470142 50V 47PF CH ±5% 2
C133 1733221152 50V 220PF B ±5% 1
C139, 140 1733472272 50V 0.0047 µF F +8~-20% 2
C141 1733101142 50V 100PF CH ±5% 1
VR (Rotary)
VR101A, B 1951032402 10KBX2 1
VR102A, B 1951031601 10KAX2 1
PCB
2001300300 PCB, FIGURED 1.6T 94V-0 1
Speakers
2110040204 1-3/4" PEIZO SPEAKER 2
2110075303 12Ω 3" SHIELDED SPEAKER 2
Wires
2286053803 VINYL COAT WIRE 380-5-5 1
AWG24 UL1007 BLUE
2284053803 VINYL COAT WIRE 380-5-5 2
AWG24 UL1007 YELLOW
P103A, B 2282062203 VINYL COAT WIRE 220-5-5 1
AWG26 UL1007 RED
P104A, B 2285062203 VINYL COAT WIRE 220-5-5 1
AWG26 UL1007 GREEN
P105A, B 2280062203 VINYL COAT WIRE 220-5-5 1
AWG26 UL1007 BLACK
J101, 102, 111 2350607500 JUMPER WIRE 0.6∅ - 7.5 11
113, 115, 116,
117, 118, 119,
120
J103, 104, 109, 2350610000 JUMPER WIRE 0.6∅ -10 5
110, 112
J105, 106, 107 2350615000 JUMPER WIRE 0.6∅ -15 4
114
RB101A, B 2360100002 CONNECTIVE CORD 1
5C-100 AWG26 UL1007
RB102A, B 2360130001 CONNECTIVE CORD 1
4C-130 AWG26 UL1007
Capasitors (Electrolitic)
C101, 102, 103, 1546105112 50V 1 µF85°C ±20% 8
104, 111, 112,
113, 114
C117, 118, 119, 1542107112 10V 100 µF85°C ±20% 8
120, 121, 122,
128, 132
C129 1544107112 25V 100 µF85°C ±20% 1
Jacks
JK101, 102, 103 2460103003 JACK (EAR), 3
3P ST-3.5∅-3P LJE0361-3RT
JK104 2460801004 JACK (DC) 2.0 DIA DC-014 1
JK105 2460601001 JACK (RCA), 1
1P RJ-1034-30BL-02
2460601002 JACK (RCA), 1
1P NUT TYPE SCJ-0363B
7
Page 9
Two-Way Speaker System Media 2
PACKAGING EXPLODED VIEW
8
Page 10
Two-Way Speaker System Media 2
INTEGRATED CIRCUITS
9
Page 11
Media 2 Schematic Diagram
TWO-WAYSPEAKER SYSTEM
Media 2 Speakers
10
1
2
3
4
5
6
7
8
9
LMNK
J
IHGFEDCBA
9
8
7
6
5
4
3
2
1
LMNABCDE FGH IJK
7.65V
0V
0V
3.82V
3.82V
3.82V
3.82V
3.82V
3.82V
3.82V
3.82V
3.82V
3.82V
3.82V 3.82V
7.95V
0V
0V
7.98V
16.40V
15.7V
16.19V
0.60V 0V 0.60V 0V
0V0V
0V 5.60V
0V
0V
0V0V
0.60V 0V
0.60V
7.80V
0V
16.40V
0V
0V
0V
0V
0V
0V
7.93V
7.91V
3.82V
3.82V
3.82V
3.82V
3.82V
3.82V
3.82V
3.82V
3.82V
7.69V
1.54V
1.59V
3.81V
6.7V
1.37V
0V
0V
0V
0.7V
7.5V
2.1V
2.8V
0.34V
5.1V 0V
8.76V
16.0V
9.4V
16.3V
Test voltages are printed in orange.
voltages are
displayed in boxes. Other voltages
shown are for due
to the Auto On/Off function.
Operational Mode
Stand-by Mode
3.8V
3.8V
3.8V
3.8V
3.8V
3.8V
3.8V
3.8V
3.8V
3.8V
3.8V 3.8V
7.6V
0V
0V
2.7V
0.01V
1.85V
+16.0
8.1V
8.7V
16.0V
0.65V
0.93V
7.6V
3.8V
3.8V
3.8V
3.8V
3.8V
3.8V
3.8V
3.8V
3.8V
0V
0V
0V
Page 12
TWO-WAY SPEAKER SYSTEM
.
1
Media 2 Schematic Diagram
IHGFEDCBA
2
3.8V
3.82V
3.8V
3.82V
3.8V
3.82V
3.8V 3.8V
3.82V 3.82V
0V
0V
3.8V
3.82V
3
3.8V
3.82V
3.8V
3.82V
4
3.8V
3.82V
7.65V
7.6V
3.82V
3.8V
3.82V
3.8V
3.82V
3.8V
5
0V
6
3.8V
3.8V
3.82V
3.82V
3.8V
3.82V
3.8V
0V
3.82V
3.8V
3.82V
3.8V
3.82V
0.01V
7
0.7V
7
8
9
AB CDEF GH I
3.82V
3.8V
3.82V
3.8V
3.82V
3.8V
7.69V
7.6V
1.54V
1.59V
3.81V
0.93V
6.7V
1.37V
0.65V
0.34V
2.8V
0V
5.1V 0V
Page 13
Media 2 Schematic Diagram
Media 2 Speakers
IHGF
J
K
LMN
1
0V0V
0V 5.60V
0V
0.60V 0V 0.60V 0V
0V
0V0V
0.60V 0V
0V
16.19V
7.80V
0V
0.60V
16.40V
15.7V
0V
0V
0V
7.98V
7.95V
0V
0V
7.93V
0V
7.91V
0V
16.40V
0V
0V
0V
2
3
4
5
8.1V
8.76V
16.0V
8.7V
16.0V
9.4V
Test voltages are printed in orange.
Operational Mode
voltages are
2.8V
0.01V
7.5V
0V
0.7V
2.7V
2.1V
0V
1.85V
0V
0V
3.8V
0V
3.82V
3.8V
3.82V
3.8V
3.82V
6.7V
1.37V
1.54V
1.59V
3.81V
0.93V
0.65V
0.34V
5.1V 0V
7.69V
V
7.6V
+16.0
16.3V
6
7
8
displayed in boxes. Other voltages
shown are for due
Stand-by Mode
to the Auto On/Off function.
9
J
K
LMNFGH I
10
Page 14
Media 2 Schematic Diagram
TWO-WAYSPEAKER SYSTEM
Media 2 Speakers
10
1
2
3
4
5
6
7
8
9
LMNK
J
IHGFEDCBA
9
8
7
6
5
4
3
2
1
LMNABCDE FGH IJK
7.65V
0V
0V
3.82V
3.82V
3.82V
3.82V
3.82V
3.82V
3.82V
3.82V
3.82V
3.82V
3.82V 3.82V
7.95V
0V
0V
7.98V
16.40V
15.7V
16.19V
0.60V 0V 0.60V 0V
0V0V
0V 5.60V
0V
0V
0V0V
0.60V 0V
0.60V
7.80V
0V
16.40V
0V
0V
0V
0V
0V
0V
7.93V
7.91V
3.82V
3.82V
3.82V
3.82V
3.82V
3.82V
3.82V
3.82V
3.82V
7.69V
1.54V
1.59V
3.81V
6.7V
1.37V
0V
0V
0V
0.7V
7.5V
2.1V
2.8V
0.34V
5.1V 0V
8.76V
16.0V
9.4V
16.3V
Test voltages are printed in orange.
voltages are
displayed in boxes. Other voltages
shown are for due
to the Auto On/Off function.
Operational Mode
Stand-by Mode
3.8V
3.8V
3.8V
3.8V
3.8V
3.8V
3.8V
3.8V
3.8V
3.8V
3.8V 3.8V
7.6V
0V
0V
2.7V
0.01V
1.85V
+16.0
8.1V
8.7V
16.0V
0.65V
0.93V
7.6V
3.8V
3.8V
3.8V
3.8V
3.8V
3.8V
3.8V
3.8V
3.8V
0V
0V
0V
Page 15
TWO-WAY SPEAKER SYSTEM
.
1
Media 2 Schematic Diagram
IHGFEDCBA
2
3.8V
3.82V
3.8V
3.82V
3.8V
3.82V
3.8V 3.8V
3.82V 3.82V
0V
0V
3.8V
3.82V
3
3.8V
3.82V
3.8V
3.82V
4
3.8V
3.82V
7.65V
7.6V
3.82V
3.8V
3.82V
3.8V
3.82V
3.8V
5
0V
6
3.8V
3.8V
3.82V
3.82V
3.8V
3.82V
3.8V
0V
3.82V
3.8V
3.82V
3.8V
3.82V
0.01V
7
0.7V
7
8
9
AB CDEF GH I
3.82V
3.8V
3.82V
3.8V
3.82V
3.8V
7.69V
7.6V
1.54V
1.59V
3.81V
0.93V
6.7V
1.37V
0.65V
0.34V
2.8V
0V
5.1V 0V
Page 16
Media 2 Schematic Diagram
2
Media 2 Speakers
IHGF
J
K
LMN
1
0V0V
0V 5.60V
0V
0.60V 0V 0.60V 0V
0V
0V0V
0.60V 0V
0V
16.19V
7.80V
0V
0.60V
16.40V
15.7V
0V
0V
0V
7.98V
7.95V
0V
0V
7.93V
0V
7.91V
0V
16.40V
0V
0V
0V
2
3
4
5
8.1V
8.76V
16.0V
8.7V
16.0V
9.4V
Test voltages are printed in orange.
Operational Mode
voltages are
2.8V
0.01V
7.5V
0V
0.7V
2.7V
2.1V
0V
1.85V
0V
0V
3.8V
0V
3.82V
3.8V
3.82V
3.8V
3.82V
6.7V
1.37V
1.54V
1.59V
3.81V
0.93V
0.65V
0.34V
5.1V 0V
7.69V
V
V
7.6V
+16.0
16.3V
6
7
8
displayed in boxes. Other voltages
shown are for due
Stand-by Mode
to the Auto On/Off function.
9
J
K
LMNFGH I
10
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