Smart MN586B Schematics
MN586B Active Cinema Booth Monitor
T he SMART MN586B Cinema booth monitor is a low cost acti ve monitor that employs a 10
Watt solid state amplifier and a 4 inc h loudspeaker mounted on a 5 1/4 inch high rac k mount
panel. Input connections are made to Phoenix screw type terminal strips on the back of the PC
board of the audio power amplifier . Eac h of six channels can be selected b y the front panel
Channel Selector Switch. T he c hannels are labeled:
LEFT - CENTER - RIGHT - LEFT SURROUND - RIGHT SURROUND - SUBWOOFER.
T he slide switch mounted on the front panel allows for switc hing betwen processor and ampli-
fier inputs. Input wiring to the monitor amplifier may be a multi-conductor shielded audio cable
or with individual shielded cables for each channel. Since the MN586B is almost always
mounted between the cinema stereo processor and the power amplifiers, wiring is generally
very short. T he processor and amplifier grounds are isolated from eac h other to prevent ground
loop hum in the rack system.
T he power transformer for the MN586B deli vers 18 Volts A C to the PC board. T he quic k conÂnect inputs for the A C are clearly labeled on the PC board. Export models are supplied with a
US type line cord. You must cut off the power plug and add your own local power plug.
T he special loudspeaker used in the MN586B has a clean midrange response to allow the
sound to penetrate the normal booth noise. T his shaped response allows maximum clarity w hile
monitoring each channel.
SMART maintains a factory service department to assist you in any service questions you may
hav e. Technicians are a vailable from 9:00 A.M. until 5:00 P.M. Eastern Time Monda y through
Frida y.
SMART Devices, Inc.
5945 Peac htree Corners East
Norcross, GA 30071-1336
800-45-SMART T oll F ree
770-449-6698 Voice
770-449-6728 FAX
Information: info@smartdev .com
Service: service@smartdev .com
http://www .smartdev .com/
p
eaker
To S
T3
T4
1
1
0
C6
21
24V+
R5
1uF
C3
C2
+
4.7uFT 35V
R6
21
1
1%
910
R3
4.7uFT 35V
C7
+
1%
10
0
U1
R2
2K7
5
21
100K
1%
21
Vs
+
15K
R1
4
OUT
1%
1000uF 35V
1%
2.7
R4
21
3
GND
+
1-2
+
C4
4.7uFT 35V
C5
R7
t
2 1
200pFc
1%
OPEN
21
0.1uF
C8
0
C1
4700uF 35V
0
+
24V+
0 0
0
1
+
2
AC23AC1
-
BR1
4
0
1
T2
1
T1
B
Page Size:
1
March 18, 19991 - 3.25.1999 - RJL 11
586BB500 - MN586B ECONOMY MONITOR
RJL
5945 Peachtree Corners East
Norcross, GA 30071-1336
770 449-6698
SMART Devices, Inc.
Revision: Page of
Designer:
2
2
5
8
9
1011121314
134
SW2
6
A_GND
P_GND
1
SW1
23456
7
From Power Transformer
18 VAC
3
P_SUB+
P_RS+
P_LS+
P_R+
P_C+
P_L+
A_L+
A_C+
A_GND
A_GND
A_R+
A_GND
A_LS+
A_GND
A_RS+
A_SUB+
A_GND
2
3
A_GND
1%
10K
R13
TB1H
B B
P_GND
1%
21
21
3K3
R12
8
7
6
TB1F
TB1G
1%
10K
R11
TB1E
P_GND
1%
1%
TB1C
3
1%
21
10K
3K3
R9
R8
2
TB1B1TB1A
21
21
21
3K3
R10
5
4
TB1D
1%
180K
R17
21
101%R19
1%
21
21
470K
180K
R18
TB2E6TB2F
TB2D
5
4
1%
1%
21
21
470K
R20
R21
TB3A3TB3C
1
21
1%
10
R22
TB3B
2
R25
1%
1%
21
21
180K
470K
R23
R24
TB3E7TB3G9TB3I11TB3K
TB3D
5
4
21
21
1%
R27
10
1%
21
470K
R26
TB3F8TB3H10TB3J12TB3L
6
10
1%
470K
R28
21
1%
1%
10
R29
1%
21
21
470K
R30
R31
21
1%
10
4
A A
P_GND
P_GND
P_GND
P_GND
4
TB2C
1%
1%
10K
R15
TB1L
1%
21
21
10K
R14
12
10
11
9
TB1I
TB1J
TB1K
21
10K
R16
2
3
1
TB2B
TB2A
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