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

1

1

12

12

SOLDER HERE

NOTES:

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MOD BOX AMPLIFIER ACCESSORY BOARD CONNECTIONS

PM0564-03