PM0564-03
MoD BoX Deluxe
Amplifier Accessory Board
Connection Instructions
Amplifier Accessory Board Connection Instructions
Introduction:
This instruction shows you how to connect the accessory board to external audio
equipment, so please read all of this introductory material.
You should save these instructions for future reference. Many different connection
schemes are possible, and additional options and configurations can be added to existing
connections.
If you want to use the accessory board in a configuration that is not described, or if you
have difficulty installing one of the configurations, refer to the accessory board block
diagram (Figure 13), schematic diagram (Figure 14), and the installation tips and tech-
niques at the end of this installation instruction.
IMPORTANT: FOR PAGING AND MICROPHONE CAPABILITY YOU
WILL NEED KIT KOV-106-000-06, -09 OR -10. (SEE PAGE 35 OF
YOUR MOD BOX OWNERS MANUAL.)
PM0564-03 MOD BOX AMPLIFIER ACCESSORY BOARD CONNECTIONS
1
COPYRIGHT © 2006 MERIT ENTERTAINMENT
Preparation
Before you begin, study the configuration that you wish to use to determine which
jumpers and audio cables will be needed to complete the installation (external cables for
connecting from the accessory board to other equipment must be purchased or as-
sembled).
When you have obtained all of the cables, continue with the installation.
COPYRIGHT © 2006 MERIT ENTERTAINMENT
External Connections
You are now prepared to connect the external devices. There are 4 different and
independent types of connections possible. You can connect:
• up to 2 microphones
• an external preamplifier (used for tone and volume control for the entire system)
• an external music source
• a separate external amplifier
The following paragraphs, along with the accessory board block diagram (Figure 3) and
schematic diagram (Figure 4), describe these connections.
PAGING MICROPHONE CONNECTIONS
The MoD BoX Paging Kit (part #KOV-106-000-06) is available through your local
authorized dealer.
2 Microphones
Plug the 5-way header of the first EC1918-01 microphone cable (part of MoD BoX Paging
Kit) into the microphone input header on the preamplifier. (This is a piggyback connection.)
Plug the 5-way header of the EC1918-01 microphone cable for the second microphone
into P3 of the amplifier accessory board.
1 Microphone
Plug the 5-way header of the EC1918-01 microphone cable into P3 of the amplifier
accessory board.
2 MOD BOX AMPLIFIER ACCESSORY BOARD CONNECTIONS PM0564-03
COPYRIGHT © 2006 MERIT ENTERTAINMENT
INDEX TO CONNECTION INFORMATION
Connection
External Preamplifier .................................................................................................... p. 4
Input
Stereo Background Music Input (Background Music, Tuner, TV) .............................. p. 5
Mono Background Music Input (Background Music, Tuner, TV) ................................ p. 6
Background Level and Switch-In Time Delay Adjustments ...................................... p. 7
Stereo Auxiliary Music Input (Tuner, TV, Turntable, etc.) ........................................... p. 8
External Amplifier (Choose only one of these connection schemes)
External Stereo Amplifier (Volume/Tone Controlled by Jukebox Preamp) .................. p. 9
External Mono Amplifier (Volume/Tone Controlled by Jukebox Preamp) .................... p. 10
External Stereo Amplifier (Volume/Tone Independent of Jukebox) ............................ p. 11
External Mono Amplifier (Volume/Tone Independent of Jukebox) .............................. p. 12
PM0564-03 MOD BOX AMPLIFIER ACCESSORY BOARD CONNECTIONS
3
COPYRIGHT © 2006 MERIT ENTERTAINMENT
External Preamplifier
Use this configuration if you want the volume and tone of the entire jukebox sound system
to be controlled by an external preamplifier. This configuration uses the AVC portion of the
jukebox’s preamp, but bypasses its tone and volume controls.
Instructions
Cables and Jumpers
Obtain four shielded audio cables long enough to reach between the external preamp and
the amplifier accessory board.
This configuration requires only one of the three jumpers supplied with the accessory
board. Connect this jumper between:
1.
J9 (LH CH INPUT) and J14 (INVERTER OUTPUT).
Input and Output Connections
Connect the input to the external preamp as follows:
1.
Preamp RIGHT CH INPUT to J4 (RIGHT CH PREAMP AUX OUTPUT)
2.
Preamp LEFT CH INPUT to J2 (LEFT CH PREAMP AUX OUTPUT)
Connect the external preamp output as follows:
1.
External preamp RIGHT CH OUTPUT to J12 (RIGHT CH POWER AMP INPUT)
2.
External preamp LEFT CH OUTPUT to J10 (INVERTER INPUT)
WARNING: Be sure that the equipment you are connecting to
the Jukebox has an isolation transformer type power supply.
Equipment that does not have an isolation transformer can
damage the jukebox and/or create a shock hazard.
FIGURE 4 - EXTERNAL PREAMP CONNECTIONS
4 MOD BOX AMPLIFIER ACCESSORY BOARD CONNECTIONS PM0564-03
J1
J2
J3
J4
J5
P1
AUX.
INTERCONNECT
SWITCH IN
TIME ADJUST
FOR BGM
P3
P4
J12
J13
J19
J20
J18
J17
J16
J11
J8
J10
J9
J15
J14
J7
J6
BGM
MUSIC
LEVEL
ADJUST
PREAMP/POWER AMP INTERCONNECT
P2
STEREO PREAMP
USED FOR TONE
AND VOLUME
CONTROL
OUT
OUT
IN
IN
COPYRIGHT © 2006 MERIT ENTERTAINMENT
Instructions
Cables and Jumpers
Obtain two shielded audio cables long enough to reach between the input device (FM radio,
TV, tape player, etc.) and the amplifier accessory board.
This configuration requires all three jumpers supplied with the accessory board. Connect
these jumpers between:
1.
J9 (LEFT CH POWER AMP INPUT) and J14 (INVERTER OUTPUT).
2.
J13 (RIGHT CH POWER AMP INPUT) and J20 (RIGHT CH PREAMP OUTPUT).
3.
J11 (INVERTER INPUT) and J16 (LH CH OUTPUT).
Input Level Considerations
The background music input can accept a wide range of input levels. You can connect
speaker lines, aux. outputs or line outputs.
Stereo Background Music Input
Connect a stereo device as described here to provide background music from an external
source during periods that the jukebox is not playing a paid selection. The volume of this
music (generally lower than paid selections) is adjusted on the amplifier accessory board as
described on Page 9. The jukebox preamplifier settings are used for tone control. A device
connected to this input will not be heard during pages, or while the jukebox is playing a
selection.
WARNING: Be sure that the equipment you are connecting to
the Jukebox has an isolation transformer type power supply.
Equipment that does not have an isolation transformer can
damage the jukebox and/or create a shock hazard.
Input Connections
Connect the input cable from the music
source as follows:
1.
RIGHT CHANNEL J8 (RH CH BGM)
2.
LEFT CHANNEL J6 (LH CH BGM)
FIGURE 5 - STEREO BACKGROUND MUSIC CONNECTIONS
PM0564-03 MOD BOX AMPLIFIER ACCESSORY BOARD CONNECTIONS
5
J1
J2
J3
J4
J5
P1
AUX.
INTERCONNECT
SWITCH IN
TIME ADJUST
FOR BGM
P3
P4
J12
J13
J19
J20
J18
J17
J16
J11
J8
J10
J9
J15
J14
J7
J6
BGM
MUSIC
LEVEL
ADJUST
PREAMP/POWER AMP INTERCONNECT
P2
STEREO MUSIC
SOURCE FOR
JUKEBOX
L
R
COPYRIGHT © 2006 MERIT ENTERTAINMENT
Instructions
Cables and Jumpers
Obtain one shielded audio cable long enough to reach between the input device (FM radio,
TV, tape player, etc.) and the amplifier accessory board.
This configuration requires all three jumpers supplied with the accessory board. Connect
these jumpers between:
1.
J9 (LEFT CH POWER AMP INPUT) and J14 (INVERTER OUTPUT).
2.
J13 (RIGHT CH POWER AMP INPUT) and J20 (RIGHT CH PREAMP OUTPUT).
3.
J11 (INVERTER INPUT) and J16 (LH CH OUTPUT).
Input Level Considerations
The background music input can accept a wide range of input levels. You can connect
speaker lines, aux. outputs or line outputs.
WARNING: Be sure that the equipment you are connecting to
the Jukebox has an isolation transformer type power supply.
Equipment that does not have an isolation transformer can
damage the jukebox and/or create a shock hazard.
Mono Background Music Input
Connect a mono device as described here to provide background music from an external
source during periods that the jukebox is not playing a paid selection. The volume of this
music (generally lower than paid selections) is adjusted on the amplifier accessory board as
described on Page 9. The jukebox preamplifier settings are used for tone control. A device
connected to this input will not be heard during pages, or while the jukebox is playing a
selection.
Input Connections
Connect the input cable from the
music source as follows:
1.
Music source output to J7
(BGM MONO)
FIGURE 6 - MONO BACKGROUND MUSIC CONNECTIONS
6 MOD BOX AMPLIFIER ACCESSORY BOARD CONNECTIONS PM0564-03
J1
J2
J3
J4
J5
P1
AUX.
INTERCONNECT
SWITCH IN
TIME ADJUST
FOR BGM
P3
P4
J12
J13
J19
J20
J18
J17
J16
J11
J8
J10
J9
J15
J14
J7
J6
BGM
MUSIC
LEVEL
ADJUST
PREAMP/POWER AMP INTERCONNECT
P2
MONO MUSIC
SOURCE FOR
JUKEBOX
COPYRIGHT © 2006 MERIT ENTERTAINMENT
Background Level and Switch-In Time Delay Adjustments
Background Level Adjustment
1.
Select a song from the jukebox and make sure that the jukebox volume is at the desired
level.
2.
Cancel the song, turn the SWITCH-IN TIME adjustment clockwise as far as it will go.
3.
When the background music begins to play (in approximately 10 seconds), adjust the
BGM MUSIC LEVEL control for the desired background music level.
Switch-In Time Adjustment
The Switch-In Time can be adjusted from a minimum of approximately 10 seconds to a
maximum of approximately two minutes. To set this time:
1.
Make another selection. While the song is playing, turn the SWITCH-IN TIME ADJUST
(see Figure 2) fully clockwise (it should already be in this position if you have just
finished the background music adjustment). Cancel the music. Approximately 10
seconds after the selection finishes, the background music will begin playing.
2.
Turn the SWITCH-IN TIME ADJUST control counter clockwise slightly, play and cancel a
record, and note the switch-in time.
3.
Repeat step 2 until the desired switch-in time is reached.
BGM LEVEL ADJUST
SWITCH-IN TIME
FIGURE 7 - ADJUSTMENT LOCATIONS ON AMPLIFIER ACCESSORY BOARD
PM0564-03 MOD BOX AMPLIFIER ACCESSORY BOARD CONNECTIONS
7
COPYRIGHT © 2006 MERIT ENTERTAINMENT
Instructions
IR Remote Kit
You must obtain and install Kit # KOV-106-000-07.
Cables and Jumpers
Obtain two shielded audio cables long enough to reach between the input device (FM radio,
TV, tape player, etc.) and the amplifier accessory board. Install an appropriate switch box
as illustrated below.
This configuration requires all three jumpers supplied with the Accessory Board.
Connect these jumpers between:
1.
J9 (LEFT CH POWER AMP INPUT) and J14 (INVERTER OUTPUT).
2.
J13 (RIGHT CH POWER AMP INPUT) and J20 (RIGHT CH PREAMP OUTPUT).
3.
J11 (INVERTER INPUT) and J16 (LH CH OUTPUT).
Input Connections
Connect the input cable
from the music source
as follows:
1. RIGHT CHANNEL J5
(RIGHT CH AUX IN)
2. LEFT CHANNEL J1
(LEFT CH AUX IN)
FIGURE 8 - STEREO AUXILIARY MUSIC CONNECTIONS
WARNING: Be sure that the equipment you are connecting to
the Jukebox has an isolation transformer type power supply.
Equipment that does not have an isolation transformer can
damage the jukebox and/or create a shock hazard.
Stereo Auxiliary Music Input
You can connect a stereo device as described here, but you must suspend normal jukebox
operation while playing from this source. To do this, you must use the “Power” button on the
optional MoD BoX Infrared Remote Control. This will suspend jukebox operation while play-
ing the external source through the MoD BoX Amplifier and speakers (jukebox selections will
remain in queue and will resume when the “Power” button is pressed again). The jukebox
tone and volume controls will be used for this source as well as when the jukebox is playing
normally. Quick-disconnect or switching means should be included so that the external
source can be disconnected when restoring normal jukebox operation to prevent both
music programs from being fed to the amplifier simultaneously.
8 MOD BOX AMPLIFIER ACCESSORY BOARD CONNECTIONS PM0564-03
J1
J2
J3
J4
J5
P1
AUX.
INTERCONNECT
SWITCH IN
TIME ADJUST
FOR BGM
P3
P4
J12
J13
J19
J20
J18
J17
J16
J11
J8
J10
J9
J15
J14
J7
J6
BGM
MUSIC
LEVEL
ADJUST
PREAMP/POWER AMP INTERCONNECT
P2
STEREO MUSIC
SOURCE FOR
JUKEBOX
PREAMPLIFIER
DISCONNECT
L
R
COPYRIGHT © 2006 MERIT ENTERTAINMENT
WARNING: Be sure that the equipment you are connecting to
the Jukebox has an isolation transformer type power supply.
Equipment that does not have an isolation transformer can
damage the jukebox and/or create a shock hazard.
External Stereo Amplifier Connection - Juke Controlled
To drive extra speaker loads with an external stereo amplifier, use this configuration if
you want its volume and tone to be controlled by the jukebox tone and volume controls.
Instructions
Cables and Jumpers
Obtain two shielded audio cables long enough to reach between the external amplifier
and the amplifier accessory board.
This configuration requires all three jumpers supplied with the accessory board. Connect
these jumpers between:
1.
J9 (LEFT CH POWER AMP INPUT) and J14 (INVERTER OUTPUT).
2.
J13 (RIGHT CH POWER AMP INPUT) and J20 (RIGHT CH PREAMP OUTPUT).
3.
J11 (INVERTER INPUT) and J16 (LH CH PREAMP OUTPUT).
Input Level Considerations
The background music input can accept a wide range of input levels. You can connect
speaker lines, aux. outputs or line outputs.
Input Connections
Connect the input cable from the external amplifier to the accessory board as follows:
1.
Connect the external amplifier’s RIGHT CH INPUT to J19 (RIGHT CH PREAMP OUTPUT).
2.
Connect the external amplifier’s LEFT CH INPUT to J15 (LEFT CH PREAMP OUT).
FIGURE 9 - STEREO EXTERNAL CONNECTIONS (CONTROLLED BY JUKEBOX VOLUME)
PM0564-03 MOD BOX AMPLIFIER ACCESSORY BOARD CONNECTIONS
9
L
Note: The pre-amplifier will mute
between selections
J1
J2
J3
J4
J5
P1
AUX.
INTERCONNECT
SWITCH IN
TIME ADJUST
FOR BGM
P3
P4
J12
J13
J19
J20
J18
J17
J16
J11
J8
J10
J9
J15
J14
J7
J6
BGM
MUSIC
LEVEL
ADJUST
PREAMP/POWER AMP INTERCONNECT
P2
STEREO EXTERNAL
AMPLIFIER
R
COPYRIGHT © 2006 MERIT ENTERTAINMENT
Instructions
Cables and Jumpers
Obtain a shielded audio cable long enough to reach between the external amplifier and
the amplifier accessory board.
This configuration requires all three jumpers supplied with the Accessory Board.
Connect these jumpers between:
1.
J9 (LEFT CH POWER AMP INPUT) and J14 (INVERTER OUTPUT).
2.
J13 (RIGHT CH POWER AMP INPUT) and J20 (RIGHT CH PREAMP OUTPUT).
3.
J11 (INVERTER INPUT) and J16 (LH CH OUTPUT).
Input Connections
Connect the input cable from the external amplifier to the accessory board as follows:
1.
Connect the input cable from the external amplifier INPUT to J18 (PREAMP MONO
OUTPUT).
WARNING: Be sure that the equipment you are connecting to
the Jukebox has an isolation transformer type power supply.
Equipment that does not have an isolation transformer can
damage the jukebox and/or create a shock hazard.
External Mono Amplifier Connection - Juke Controlled
To drive extra speaker loads with an external monaural amplifier, use this configuration if
you want its volume and tone to be controlled by the jukebox tone and volume controls.
FIGURE 10 - MONO EXTERNAL AMPLIFIER CONNECTIONS
(CONTROLLED BY JUKEBOX VOLUME)
10 MOD BOX AMPLIFIER ACCESSORY BOARD CONNECTIONS PM0564-03
J1
J2
J3
J4
J5
P1
AUX.
INTERCONNECT
SWITCH IN
TIME ADJUST
FOR BGM
P3
P4
J12
J13
J19
J20
J18
J17
J16
J11
J8
J10
J9
J15
J14
J7
J6
BGM
MUSIC
LEVEL
ADJUST
PREAMP/POWER AMP INTERCONNECT
P2
MONO SLAVE
AMPLIFIER
Note: The pre-amplifier will mute
between selections
COPYRIGHT © 2006 MERIT ENTERTAINMENT
WARNING: Be sure that the equipment you are connecting to
the Jukebox has an isolation transformer type power supply.
Equipment that does not have an isolation transformer can
damage the jukebox and/or create a shock hazard.
External Stereo Amplifier Connection - No Juke Control
To drive extra speaker loads with an external stereo amplifier, use this configuration if
you wish to use the volume and tone controls of the external amplifier.
Instructions
Cables and Jumpers
Obtain two shielded audio cables long enough to reach between the external amplifier
and the amplifier accessory board.
This configuration requires all three jumpers supplied with the accessory board. Connect
these jumpers between:
1.
J9 (LEFT CH POWER AMP INPUT) and J14 (INVERTER OUTPUT).
2.
J13 (RIGHT CH POWER AMP INPUT) and J20 (RIGHT CH PREAMP OUTPUT).
3.
J11 (INVERTER INPUT) and J16 (LH CH OUTPUT).
Input Connections
Connect the input cable from the external amplifier to the accessory board as follows:
1.
Connect the external amplifier LEFT CH INPUT to J2 (LEFT CH AUX. OUTPUT).
2.
Connect the external amplifier RIGHT CH INPUT to J4 (RIGHT CH AUX. OUTPUT).
PM0564-03 MOD BOX AMPLIFIER ACCESSORY BOARD CONNECTIONS
11
J1
J2
J3
J4
J5
P1
AUX.
INTERCONNECT
SWITCH IN
TIME ADJUST
FOR BGM
P3
P4
J12
J13
J19
J20
J18
J17
J16
J11
J8
J10
J9
J15
J14
J7
J6
BGM
MUSIC
LEVEL
ADJUST
PREAMP/POWER AMP INTERCONNECT
P2
STEREO EXTERNAL
AMPLIFIER
L
R
Note: The amplifier will not
mute between selections
FIGURE 11 - STEREO EXTERNAL AMPLIFIER CONNECTIONS
(INDEPENDENT OF JUKEBOX VOLUME)
COPYRIGHT © 2006 MERIT ENTERTAINMENT
WARNING: Be sure that the equipment you are connecting to
the Jukebox has an isolation transformer type power supply.
Equipment that does not have an isolation transformer can
damage the jukebox and/or create a shock hazard.
External Mono Amplifier Connection - No Juke Control
To drive extra speaker loads with an external monaural amplifier, use this configuration if
you wish to use the volume and tone controls of the external amplifier.
Instructions
Cables and Jumpers
Obtain a shielded audio cable long enough to reach between the external amplifier and
the amplifier accessory board.
This configuration requires all three jumpers supplied with the accessory board. Connect
these jumpers between:
1.
J9 (LEFT CH POWER AMP INPUT) and J14 (INVERTER OUTPUT).
2.
J13 (RIGHT CH POWER AMP INPUT) and J20 (RIGHT CH PREAMP OUTPUT).
3.
J11 (INVERTER INPUT) and J16 (LH CH OUTPUT).
Input Connections
Connect the input cable from the external amplifier to the accessory board as follows:
1.
Connect the external amplifier INPUT to J3 (AUX. OUTPUT MONO).
FIGURE 12 - MONO EXTERNAL AMPLIFIER CONNECTIONS
(INDEPENDENT OF JUKEBOX VOLUME)
12 MOD BOX AMPLIFIER ACCESSORY BOARD CONNECTIONS PM0564-03
J1
J2
J3
J4
J5
P1
AUX.
INTERCONNECT
SWITCH IN
TIME ADJUST
FOR BGM
P3
P4
J12
J13
J19
J20
J18
J17
J16
J11
J8
J10
J9
J15
J14
J7
J6
BGM
MUSIC
LEVEL
ADJUST
PREAMP/POWER AMP INTERCONNECT
P2
MONAURAL
EXTERNAL
AMPLIFIER
INPUT
Note: The amplifier will not
mute between selections
COPYRIGHT © 2006 MERIT ENTERTAINMENT
FIGURE 13 - ACCESSORY BOARD BLOCK DIAGRAM
PM0564-03 MOD BOX AMPLIFIER ACCESSORY BOARD CONNECTIONS
13
PHONOGRAPH
CARTRIDGE
MONO/STEREO
SWITCH
RIAA
COMPENSA
TED
AMPLIFIER
RIAA
COMPENSA
TED
AMPLIFIER
LEFT
CHANNEL
AV
C
AV
C
CONTROL
RIGHT
CHANNEL
AV
C
AUX.
INPUT
AUX.
INPUT
AUX.
OUTPUT
MONO
AUX. OUT
AUX.
OUTPUT
BACKGROUND
MUSIC INPUT
PREAMP MONO
OUTPUT
TONE AND
VOLUME
CONTROL
CIRCUIT
TONE AND
VOLUME
CONTROL
CIRCUIT
INVERTER
POWER
AMPLIFIER
POWER
AMPLIFIER
J19
J20
J12
J13
J18
J16
J17
J10
J1
1
J14
J15
J9
J6
J8
J7
J3
J2
J1
J4
J5
RIGHT CHANNEL
LEFT CHANNEL
COPYRIGHT © 2006 MERIT ENTERTAINMENT
FIGURE 14 - ACCESSORY BOARD SCHEMATIC DIAGRAM
14 MOD BOX AMPLIFIER ACCESSORY BOARD CONNECTIONS PM0564-03
GROUND COMPLETED
ON PREAMP
BOARD
AU
X
INTE
R
C
ONNECT
1 2 4 5 3
P1
MIC INTRCONNECT
NOTE:
THIS MUST
BE CONNECTED
T
O
MIC INPUT
ON
AMPLIFIER
FOR PROPER OPERA
TION
1 3 2 4
P4
P3
MIC
INPUT
1 4 3 5 2
C3
1 MFD
R15
100K
Z1 LM358
7
Z1
-
+
6
5
CR1
K1
MP5A06 Q1
Z1
-
+
1
8
4
3
2
C1
15
CR3
SLOW
R9
3.9 MEG
FAST
R10
15 K
R7
10 K
R8
2 K
TIME ADJUST
INVER
TER OUTPUT
INVER
TER INPUT
PREAMP
OUTPUT
(L
T
CH)
PREAMP
OUTPUT
(R
T
CH)
PREAMP
GROUND
POWER AMP
INPUT
(R
T
CH)
POWER AMP
INPUT
(L
T
CH)
+12.5 VDC
MUTE SENSE
BGM INPUT
(SWITCHED)
1
7
2
9
6
5
3
4
10
8
11
1
7
2
9
6
5
3
4
10
8
11
1
7
2
9
6
5
3
4
10
8
11
JUMPER PLUG
NOTE:
ONL
Y
USED WHEN
ACCESSOR
Y
BOARD IS NOT
USED.
PREAMP
CONNECT
OR
FOR INFORMA
TION ON
THE ABOVE
CONNECTIONS
REFER T
O
607925XX
PREAMP
SCHEMA
TICS
P2
PREAMP/POWER AMP
INTERCONNECT
NOTE:
NORMAL
OPERA
TION (JUMPER LOCA
TION)
JUMPER 1 R
T
CH PREAMP
OUTPUT
(J20)
T
O
R
T
CH POWER
AMP
INPUT
(J13).
JUMPER 2 L
CH PREAMP
OUTPUT
(J16)
T
O
(J9) LEFT
CH POWER
AMP
INPUT
UNLESS OTHER
WISE NOTED:
ALL
CAP
ACIT
ORS
ARE RA
TER IN uF
.
ALL
RESIST
ORS
ARE 1/4 W +-5%
AND RA
TED IN OHMS.
1
2
1
1
2
2
L CH POWER AMP
INPUT
L CH PREAMP
OUTPUT
INVERTER
OUTPUT
J9
J15
J14
J17
J16
J1
1
J10
INVER
TER
INPUT
3.3 K
3.3 K
J19
J20
R14
R13
RT C
H
PREAMP
OUTPUT
J18
PREAMP
MONO
OUTPUT
RT C
H
POWER AMP
INPUT
J12
J13
R1
1
47 K
R4
3.3 K
K1
C2
.1
J7
BGM
MONO INPUT
CR4
R12
10 K
R3
3.3 K
BGM
MUSIC LEVEL
ADJUST
INPUT
BGM
STEREO
INPUT
J8
R. CH
J6
L. CH
R1
3.3 K
R2
3.3 K
RT CH AUX OUTPUT
AUX OUTPUT MONO
L CH AUX OUTPUT
L CH AUX INPUT
RT CH AUX INPUT
J1
J5
J4
J3
J2
COPYRIGHT © 2006 MERIT ENTERTAINMENT
COMPONENT LIST FOR CIRCUIT BOARD ASSEMBLY -
PREAMP ACCESSORY BOARD
PM0564-03 MOD BOX AMPLIFIER ACCESSORY BOARD CONNECTIONS
15
COPYRIGHT © 2006 MERIT ENTERTAINMENT
FIGURE 15 - EC1942-01 HARNESS ASSEMBLY -
ACCESSORY BOARD TO PREAMP AUX INPUT
FIGURE 16 - EC1939-01 HARNESS ASSEMBLY -
PREAMP/ACCESSORY BOARD INTERCONNECT
FIGURE 17 - EC1940-01 HARNESS ASSEMBLY -
ACCESSORY BOARD TO PREAMP MIC INPUT
16 MOD BOX AMPLIFIER ACCESSORY BOARD CONNECTIONS PM0564-03
BROWN
RED/WHITE
YELLOW
BLACK
ORANGE
5
4
3
2
1
10
9
8
7
6
13
12
11
GREEN
BLUE
RED
SHIELD
WHITE/ORANGE
7
8
9
10
11
2
3
4
5
6
1
ORANGE
BLACK
YELLOW
RED/WHITE
BROWN
SHIELD
RED
BLUE
GREEN
WHITE/ORANGE
24.50
22.00
RED
SHIELD
1
2
3
4
5
GREEN
SHIELD
GREEN
SHIELD
RED
5
4
3
2
1
SHIELD
COPYRIGHT © 2006 MERIT ENTERTAINMENT
INSTALLATION TIPS AND TECHNIQUES
If you are having difficulty with your accessory board installation, review the following
list of installation tips for the problem that matches or nearly matches your situation.
Excessive Hum
The primary cause of hum is poor grounding. Make sure that each audio line connecting
the accessory board to the added equipment has a good ground at both ends. If the
wires are soldered, check for cold solder connection. If the ground connections are
crimped, look for an incomplete or forgotten crimp.
If the audio grounding is not the fault, you might have a voltage difference between the
jukebox and the added equipment. To check for this condition, unplug one cable at a time,
and measure the voltage between the ground on the cable and the Jukebox ground. You
should not be able to measure any AC or DC voltage between the two units. If you do
measure any voltage, you must isolate the added equipment from the power line.
Sometimes this can be avoided by reversing the 120 volt plug (2-prong plugs only).
If the added equipment is causing the hum and the hum is due to a voltage differential, but
the 120 plug on the equipment has a 3-prong plug, we do not advise using an isolation
plug to correct the problem. In this situation, it is suggested that you have a competent
repair center make the needed repairs.
Noise Between Audio Selections
This condition can exist if you have chosen a configuration which does not allow the
jukebox mute circuit to quiet the jukebox between selections. If this condition exists,
consult a competent electronics technician or engineer for the circuit necessary to mute
the specific added equipment and jukebox combination.
Cross talk
Cross talk can exist when an external preamp is used between the tone and volume
circuits (J16, J17 and J19, J20) and the power amplifier (J10, J11 and J12, J13). Cross
talk will exist because R13 and R14 (see schematic - Figure 14) will “mix” the left and
right channel signals.
To correct this problem, make a shorting plug (connect the center of the plug to the case)
and plug it into J18.
FIGURE 18 - SHORTING PLUG
PM0564-03 MOD BOX AMPLIFIER ACCESSORY BOARD CONNECTIONS
17
1
1
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1
12
12
SOLDER HERE
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MOD BOX AMPLIFIER ACCESSORY BOARD CONNECTIONS
PM0564-03