JBL Media 2 User manual

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
Media 2
TECHNICAL MANUAL
2 way 3" Powered Multimedia Speaker System

1
Two-Way Speaker System Media 2
TABLE OF CONTENTS
Features..........................................................................1
Specifications .................................................................1
Disassembly Procedures................................................2
Trouble Shooting ............................................................2
Block Diagram ................................................................3
Master Speaker xploded View (With Amplifier) ..........4
Slave Speaker xploded View (Without Amplifier) .......5
Printed Circuit Boards ....................................................6
lectrical Parts List ........................................................7
Packaging xploded View .............................................8
Integrated Circuits ..........................................................9
Media 2 Schematic Diagram........................................10
FEATURES
nTwo-way speaker system.
n10-watt stereo amplifier.
nAuto turn-on/turn-off circuitry.
nSpeakers are magnetically shielded for flicker-free use
alongside computer monitors.
nFor use with both Mac and PC-based computer systems.
nBuilt-in electronic equalization for smooth frequency
response.
nVariable bass contour control.
nSubwoofer 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

2
Two-Way Speaker System Media 2
DISASSEMBLY PROCEDURES
Ste 1. Unscrew (#14) from Rear Case (#2) and remove
Rear Case (#2)
Ste 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”.
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.
TROUBLE SHOOTING
1. If the ower 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 S eaker
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 S eaker
A. Check to see if it is well connected to the Master
Speaker.
4. The ower 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.

3
Two-Way Speaker System Media 2
BLOCK DIAGRAM

4
Two-Way Speaker System Media 2
MASTER SPEAKER EXPLODED VIEW (with Amplifier)

5
Two-Way Speaker System Media 2
SLAVE SPEAKER EXPLODED VIEW (without Amplifier)

6
Two-Way Speaker System Media 2
PRINTED CIRCUIT BOARDS

7
Two-Way Speaker System Media 2
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 ED/G EEN 1
Integrated Circuits
U101, 103 1281000021 TLO74CN OP AMP 2
U102 1281000031 LA4700 POWE AMP 1
Resistor (Car on)
101, 102, 103, 1312033361 1/4W 33 KΩ±5% 4
104
105, 106 1312056361 1/4W 56 KΩ±5% 2
107, 108 1312012361 1/4W 12 KΩ±5% 2
109, 110, 111 1312010361 1/4W 10 KΩ±5% 11
112, 123, 124,
130, 148, 149,
153, 156
113, 114, 115, 1312027261 1/4W 2.7 KΩ±5% 4
116
117, 118 1312015161 1/4W 150 Ω±5% 2
119, 120, 121 1312010161 1/4W 100Ω±5% 5
122, 134
125, 126, 127, 1312022961 1/4W 2.2 Ω±5% 4
128
129, 150 1312022361 1/4W 22 KΩ±5% 2
131 1312033061 1/4W 33 Ω±5% 1
132 1312010061 1/4W 10Ω±5% 1
133 1312015261 1/4W 1.5 KΩ±5% 1
135, 136, 137, 1312010461 1/4W 100 KΩ±5% 5
138, 147
139 1312015461 1/4W 150 KΩ±5% 1
140, 141 1312022261 1/4W 2.2 KΩ±5% 2
142 1312018561 1/4W 1.8 KΩ±5% 1
143 1312018461 1/4W 180 KΩ±5% 1
144, 152 1312033161 1/4W 330 Ω±5% 2
145 1312039461 1/4W 390 KΩ±5% 1
146 1312082461 1/4W 820 KΩ±5% 1
151 1312068261 1/4W 6.8 Ω±5% 1
154 1312010261 1/4W 1 KΩ±5% 1
155 1312068161 1/4W 680 Ω±5% 1
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
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)
V 101A, B 1951032402 10KBX2 1
V 102A, B 1951031601 10KAX2 1
PCB
2001300300 PCB, FIGU ED 1.6T 94V-0 1
Speakers
2110040204 1-3/4" PEIZO SPEAKE 2
2110075303 12Ω3" SHIELDED SPEAKE 2
Wires
2286053803 VINYL COAT WI E 380-5-5 1
AWG24 UL1007 BLUE
2284053803 VINYL COAT WI E 380-5-5 2
AWG24 UL1007 YELLOW
P103A, B 2282062203 VINYL COAT WI E 220-5-5 1
AWG26 UL1007 ED
P104A, B 2285062203 VINYL COAT WI E 220-5-5 1
AWG26 UL1007 G EEN
P105A, B 2280062203 VINYL COAT WI E 220-5-5 1
AWG26 UL1007 BLACK
J101, 102, 111 2350607500 JUMPE WI E 0.6∅- 7.5 11
113, 115, 116,
117, 118, 119,
120
J103, 104, 109, 2350610000 JUMPE WI E 0.6∅-10 5
110, 112
J105, 106, 107 2350615000 JUMPE WI E 0.6∅-15 4
114
B101A, B 2360100002 CONNECTIVE CO D 1
5C-100 AWG26 UL1007
B102A, B 2360130001 CONNECTIVE CO D 1
4C-130 AWG26 UL1007
Jacks
JK101, 102, 103 2460103003 JACK (EA ), 3
3P ST-3.5∅-3P LJE0361-3 T
JK104 2460801004 JACK (DC) 2.0 DIA DC-014 1
JK105 2460601001 JACK ( CA), 1
1P J-1034-30BL-02
2460601002 JACK ( CA), 1
1P NUT TYPE SCJ-0363B
ELECTRICAL PARTS LIST

8
Two-Way Speaker System Media 2
PACKAGING EXPLODED VIEW

9
Two-Way Speaker System Media 2
INTEGRATED CIRCUITS

Media 2 Schematic Diagram
TWO-WAY SPEAKER 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
LMNAB CDEFGH I JK
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
sho n 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

Media 2 Schematic Diagram
TWO-WAY SPEAKER SYSTEM
IHGFEDCBA
9
8
7
6
5
4
3
2
1
ABCDEFGH I
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
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
0.7V
7
.
2.8V
0.34V
5.1V 0V
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
0.01V
0.65V
0.93V
7.6V
3.8V
3.8V
3.8V
3.8V
3.8V
3.8V
3.8V
3.8V
3.8V

Media 2 Schematic Diagram
Media 2 Speakers
10
1
2
3
4
5
6
7
8
9
LMN
K
J
IHGF
LMNFGH I JK
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
2
V
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
sho n are for due
to the Auto On/Off function.
Operational Mode
Stand-by Mode
0V
0V
2.7V
0.01V
1.85V
+16.0
8.1V
8.7V
16.0V
0.65V
0.93V
7.6V
V
3.8V
3.8V
3.8V
0V
0V
0V

Media 2 Schematic Diagram
TWO-WAY SPEAKER 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
LMNAB CDEFGH I JK
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
sho n 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

Media 2 Schematic Diagram
TWO-WAY SPEAKER SYSTEM
IHGFEDCBA
9
8
7
6
5
4
3
2
1
ABCDEFGH I
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
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
0.7V
7
.
2.8V
0.34V
5.1V 0V
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
0.01V
0.65V
0.93V
7.6V
3.8V
3.8V
3.8V
3.8V
3.8V
3.8V
3.8V
3.8V
3.8V

Media 2 Schematic Diagram
Media 2 Speakers
10
1
2
3
4
5
6
7
8
9
LMN
K
J
IHGF
LMNFGH I JK
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
2
V
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
sho n are for due
to the Auto On/Off function.
Operational Mode
Stand-by Mode
0V
0V
2.7V
0.01V
1.85V
+16.0
8.1V
8.7V
16.0V
0.65V
0.93V
7.6V
V
3.8V
3.8V
3.8V
0V
0V
0V