Majorcom: PX-4120 User manual

Please follow the instructions in this manual to obtain the optimum results from this unit.
We also recommend that you keep this manual handy for future reference.
4 ZONE PAMIXER AMPLIFIER
PX-4120
OPERATION MANUAL
PUBLIC ADDRESS SYSTEM
SD/MEDIA
POWER EQ
MODE VOL+
NEXT
PP/SCAN VOL- PREV
97.60
MONITOR
MUTE
MUTE MUTE MUTE MUTE MUTE
Z1
Z1 Z1 Z1 Z1 Z1
Z2
Z2 Z2 Z2 Z2 Z2
Z3
Z3 Z3 Z3 Z3 Z3
Z4
Z4 Z4 Z4 Z4 Z4
LEVEL LEVEL LEVEL LEVEL LEVEL
POWER
/PROT
CH 5
CH 4CH 3CH 2
CH 1
BASS BASS BASS BASS BASSTREBLE TREBLE TREBLE TREBLE TREBLE
-10 -10 -10 -10 -10-10 -10 -10 -10 -10+10 +10 +10 +10 +10+10 +10 +10 +10 +10
ZONE 4ZONE 3ZONE 2
ZONE 1
MONMONMONMON
LEVELLEVELLEVELLEVEL
LEVEL
0dB0dB0dB0dB
0dB PROTPROTPROTPROT
CLIPCLIPCLIPCLIP
-5-5-5-5-7
-5
-3
-10-10-10-10-10
-15-15-15-15-15
00000
11111
22222
33333
44444 55555 66666
77777
88888
99999
1010101010
0 0 0 0 0
11111
22222
3 3 3 3 3
4 4 4 4 4
5 5 5 5 5
6 6 6 6 6
7 7 7 7 7
88888
9 9 9 9 9
10 10 10 10 10
ON
OFF
4 ZONE MIXER AMPLIFIER
PX-4120

TABLE OF CONTENTS
1. SAFETY PRECAUTIONS .......................................................................................3
2. FEATURES ...............................................................................................................5
3. NOMENCLATURE AND FUNCTIONS
3.1 Front Panel .............................................................................................................6
3.2 Rear Panel ..............................................................................................................7
4. OPERATION............................................................................................................. 8
5. MUTE FUNCTION.................................................................................................... 8
6. TROUBLE SHOOTING............................................................................................ 8
7. CONNECTIONS
7.1 Speaker Connections .............................................................................................. 9
7.2 XLR Connections .....................................................................................................9
8. APPLICATIONS .....................................................................................................10
9. BLOCK DIAGRAM..................................................................................................11
10.SPECIFICATIONS ...............................................................................................12
11.DIMENSIONAL DIAGRAM .................................................................................13
2

Be sure to read the instructions in this section carefully before use.
Make sure to observe the instructions in this manual as the conventions of safety symbols and messages
regarded as very important precautions are included.
We also recommend you keep this instruction manual handy for future reference.
Safety Symbol and Message Conventions
Safety symbols and messages described below are used in this manual to prevent bodily injury and property
damage which could result from mishandling. Before operating your product, read this manual first and
understand the safety symbols and messages so you are thoroughly aware of the potential safety
Indicates a potentially hazardous situation which, if mishandled, could
result in death or serious personal injury.
Indicates a potentially hazardous situation which, if mishandled, could
result in moderate or minor personal injury, and/or property damage.
When Installing the Unit
Do not expose the unit to rain or an environment
where it may be splashed by water or other liquids,
as doing so may result in fire or electric shock.
Use the unit only with the voltage specified on the
unit. Using a voltage higher than that which is
specified may result in fire or electric shock.
Do not cut, kink, otherwise damage nor modify the
power supply cord. In addition, avoid using the
power cord in close proximity to heaters, and never
place heavy objects -- including the unit itself -- on
the power cord, as doing so may result in fire or
electric shock.
Be sure to replace the unit's terminal cover after
connection completion. Because high voltage is
applied to the speaker terminals, never touch these
terminals to avoid electric shock.
Be sure to ground to the safety ground (earth)
terminal to avoid electric shock. Never ground to a
gas pipe as a catastrophic disaster may result.
Avoid installing or mounting the unit in unstable
locations, such as on a rickety table or a slanted
surface. Doing so may result in the unit falling
down, causing personal injury and/or property
damage.
When the Unit is in Use
Should the following irregularity be found during
use, immediately switch off the power, disconnect
the power supply plug from the AC outlet and
contact your nearest MAJORCM dealer. Make no
further attempt to operate the unit in this condition
as this may cause fire or electric shock.
If you detect smoke or a strange smell coming
from the unit.
If water or any metallic object gets into the unit
If the unit falls, or the unit case breaks
If the power supply cord is damaged (exposure of
the core, disconnection, etc.)
If it is malfunctioning (no tone sounds.)
To prevent a fire or electric shock, never open nor
remove the unit case as there are high voltage
components inside the unit. Refer all servicing to
your nearest MAJORCM dealer.
Do not place cups, bowls, or other containers of
liquid or metallic objects on top of the unit. If they
accidentally spill into the unit, this may cause a fire
or electric shock.
Do not insert nor drop metallic objects or
flammable materials in the ventilation slots of the
unit's cover, as this may result in fire or electric
shock.
1. SAFETY PRECAUTIONS
3

An all-pole mains switch with a contact separation of at least 3 mm in each pole shall be incorporated in
the electrical installation of the building.
When Installing the Unit
Never plug in nor remove the power supply plug
with wet hands, as doing so may cause electric
shock.
When unplugging the power supply cord, be sure
to grasp the power supply plug; never pull on the
cord itself. Operating the unit with a damaged
power supply cord may cause a fire or electric
shock.
When moving the unit, be sure to remove its power
supply cord from the wall outlet. Moving the unit
with the power cord connected to the outlet may
cause damage to the power cord, resulting in fire or
electric shock. When removing the power cord, be
sure to hold its plug to pull.
Do not block the ventilation slots in the unit's cover.
Doing so may cause heat to build up inside the unit
and result in fire.
Avoid installing the unit in humid or dusty locations,
in locations exposed to the direct sunlight, near the
heaters, or in locations generating sooty smoke or
steam as doing otherwise may result in fire or
electric shock.
When the Unit is in Use
Do not place heavy objects on the unit as this may
cause it to fall or break which may result in
personal injury and/or property damage. In
addition, the object itself may fall off and cause
injury and/or damage.
Make sure that the volume control is set to
minimum position before power is switched on.
Loud noise produced at high volume when power is
switched on can impair hearing.
Do not operate the unit for an extended period of
time with the sound distorting. This is an indication
of a malfunction, which in turn can cause heat to
generate and result in a fire.
Contact your MAJORCOM dealer as to the cleaning.
If dust is allowed to accumulate in the unit over a
long period of time, a fire or damage to the unit
may result.
If dust accumulates on the power supply plug or in
the wall AC outlet, a fire may result. Clean it
periodically. In addition, insert the plug in the wall
outlet securely.
Switch off the power, and unplug the power supply
plug from the AC outlet for safety purposes when
cleaning or leaving the unit unused for 10 days or
more. Doing otherwise may cause a fire or electric
shock.
SAFETY PRECAUTIONS
4

1. All sources are with matrix 4roads output function.
2. Remote paging MIC input with first priority, when priority is short circuit, then the remote paging MIC
is third priority.
3. One road TEL input (volume adjustable), choose 1-4 zones output freely by manual, with second priority.
4. 3 roads MIC input, with three levels selector switch input sensitivity, signal gain control.
5. 2 roads RCA stereo LINE input, signal gain control.
6. 5 roads separate adjustable tone and volume control.
7. The volume from all audio source in 1-4 zone can be adjusted.
8. 4 roads LINE output, output is not controlled by monitor volume.
9. Power output: 4R 70V 100V output terminals; one road monitor 1W 8R output.
10.With AC output protection, overload protection, short circuit protection, over heat protection, top input
protection.
11.LED indicator: Level indicator, clip indicator, protect indicator.
12.Built in MP3 player: separate power switch, MP3 player with SD card slot and USB port.
13.With float switch, Grid noise can be dealt with by floating.
2. FEATURES
5

1. Mute button and indicator,
mute on, indicators are on;
mute off, then indicators are off
2. Amplifier matrix 4 channel selector button
3. Monitor level indicator
4. Monitor volume control
Adjust monitor volume, clockwise rotation,
increase volume, conversely reduce
5. 1 zone amplifier level indicator
6. 1 zone monitor selector button
7. 1 zone amplifier output volume control
8. ON/OFF Power switch
Switch on, power on, switch down, power off
3. NOMENCLATURE AND FUNCTIONS
1
9. POWER-Power indicator
When power on, power indicators are on;
when power off, power indicators are off
10. CH1 High-pitched tone control
Adjust high pitch, clockwise rotation, increase
volume, conversely reduce
11. CH1 low-pitched tone control
Adjust low pitch, clockwise rotation, increase
volume, conversely reduce
12.CH1 volume control
13.MP3 player, with USB & SD card slot
3.1 FRONT PANEL
6
2345678
9
101112
13
SD/MEDIA
POWER EQ
MODE VOL+
NEXT
PP/SCAN VOL- PREV
97.60
MONITOR
MUTE
MUTE MUTE MUTE MUTE MUTE
Z1
Z1 Z1 Z1 Z1 Z1
Z2
Z2 Z2 Z2 Z2 Z2
Z3
Z3 Z3 Z3 Z3 Z3
Z4
Z4 Z4 Z4 Z4 Z4
LEVEL LEVEL LEVEL LEVEL LEVEL
POWER
/PROT
CH 5
CH 4CH 3CH 2
CH 1
BASS BASS BASS BASS BASSTREBLE TREBLE TREBLE TREBLE TREBLE
-10 -10 -10 -10 -10-10 -10 -10 -10 -10+10 +10 +10 +10 +10+10 +10 +10 +10 +10
ZONE 4ZONE 3ZONE 2
ZONE 1
MONMONMONMON
LEVELLEVELLEVELLEVEL
LEVEL
0dB0dB0dB0dB
0dB PROTPROTPROTPROT
CLIPCLIPCLIPCLIP
-5-5-5-5-7
-5
-3
-10-10-10-10-10
-15-15-15-15-15
00000
11111
22222
33333
44444 55555 66666
77777
88888
99999
1010101010
0 0 0 0 0
1 1 1 1 1
2 2 2 2 2
3 3 3 3 3
4 4 4 4 4
5 5 5 5 5
6 6 6 6 6
7 7 7 7 7
8 8 8 8 8
9 9 9 9 9
10 10 10 10 10
ON
OFF
4 ZONE MIXER AMPLIFIER
PX-4120

NOMENCLATURE AND FUNCTIONS
3.2 REAR PANEL
13 12 1415
1.
2.
AC power input socket
Telephone DIP switch and volume control
3. CH5 line signal input and signal gain control
4. CH4 line signal input and signal gain control
5. CH3 microphone signal input and signal gain
control
6. CH2 microphone signal input and signal gain
control
7. CH1 microphone signal input and signal gain
control
8. Remote microphone input port
9. RS232 port
10.LINE, PHANTOM, MIC signal input selector
switch
11.vents
12. ZONE1-output terminals for connecting
speakers; COM is common terminal, can be
connected to the negative electrode, the
ground, etc.4 terminal can be connected
to constant resistance 4 speaker; 70V
terminal can be connected to 70V constant
voltage speaker; 100V terminal can be
connected to 100V constant voltage speaker
13.ZONE1-LINE signal output
14.Radio antenna port
15.telephone signal input port
16.short circuit PRIORITY, can change the priority
of Telephone and MIC1
17.monitor output port
18.Floating switch
7
128
34567910 11
161718
ZONE1
ZONE3
ZONE2
ZONE4
LINE OUT
LINE OUT
LINE OUT
LINE OUT
BAL. / UNBAL.
BAL. / UNBAL.
BAL. / UNBAL.
BAL. / UNBAL.
G
G
G
G
100V
100V
100V
100V
OUTPUT
OUTPUT
OUTPUT
OUTPUT
70V
70V
70V
70V
4
4
4
4
COM
COM
COM
COM
~220V 50-60Hz 800W
T8AL 250V
LL
RR
LINE
PHANTOM PHANTOM PHANTOM
LINE LINE LINEMIC MIC MIC
ZONE
TEL.
VOLUME GAINGAINGAINGAINGAIN CH 1CH 2
CH 3
CH 4CH 5
REMOTE MIC INPUT
RS232
1W 8
T
MONITOR PRIORITY
FM ANTGR
TEL.PAGING
LIFT GND

>
4. OPERATION
For the four output terminals, please only use the COM and one of the others. When using 70V and
100V, the speaker must be with transformers. Moreover, and the total power of the speakers should
be less than the rated output power.
5. MUTE FUNCTION
Mute Priority Description: MIC1 highest priority telephone remote MIC. Telephone and MIC1
priority can be reset via the rear panel short circuit terminals. Normally, MIC1 is with the highest priority.
6. TROUBLE SHOOTING
Fault phenomenon
There is no sound output
when the line connection is good
The cause of the problem
1.No electricity or plug contact undesirable
2.The fuse was burn out
3.The volume is not open
4.No input signal
Normal startup, the alarm triggered
1. Load short circuit or damaged
2. Power supply voltage is not stable, too high or
too low
3. Overload
In the normal use of all of a sudden
no sound output
1. Temperature is too high, the machine in
temperature protection
2. Loose cable connection
>
8

7. CONNECTIONS
7.1 SPEAKER CONNECTIONS
70V/
4
7.2 XLR CONNECTIONS
9
70V 100V
COM 4
100V LINE
70V LINE
70V 100V
COM 4 70V 100V COM 4
40 (PX-4120) 83 (PX-4120)

8. APPLICATIONS
REAR PANEL CONNECTIONS
10
CD PLAYER
POWER AMPLIFIER
CD PLAYER
RM-4012
POWER AMPLIFIER
POWER AMPLIFIER
POWER AMPLIFIER
ZONE1 ZONE3
ZONE2 ZONE4
LINE OUT LINE OUT
LINE OUT LINE OUT
BAL. / UNBAL. BAL. / UNBAL.
BAL. / UNBAL. BAL. / UNBAL.
G G
G G
100V 100V
100V 100V
OUTPUT OUTPUT
OUTPUT OUTPUT
70V 70V
70V 70V
4 4
4 4
COM COM
COM COM
~220V 50-60Hz 800W
T8AL 250V
LL
RR
LINE
PHANTOM PHANTOM PHANTOM
LINE LINE LINEMIC MIC MIC
ZONE
TEL.
VOLUME GAINGAINGAINGAINGAIN CH 1CH 2
CH 3
CH 4CH 5
REMOTE MIC INPUT
RS232
1W 8
T
MONITOR PRIORITY
FM ANTGR
TEL.PAGING
LIFT GND

9. BLOCK DIAGRAM
11
ZONE ID
1 2 3 4
REMOTE MIC

10. SPECIFICATIONS
MODEL
POWER OUTPUT
OUTPUT INTERFACE
COMSUPTION
MONITOR OUTPUT
LINE1-4 OUTPUT LEVEL
HARMONIC DISTORTION
PX-4120
4X120W
4R,70V/100V
1W/8
1V/600 ( )balance output
SUPPLY VOLTAGE
~220V 50-60Hz
DIMENSION(MM)
NET WEIGHT
GROSS WEIGHT
484X440X132
13.48Kg
11.68Kg
SNR
FREQUENCY
MP3
RECORDING FORMAT
80-16KHz(0/-3dB)
Support MP3 format, max capacity of 32GB
WAV
INPUT SENSITIVITY AND
IMPEDANCE
CH1, 2, 3: 2.5mV/600 ,175mV/10K ,balance input
Ch5,6: 350mV/10K ,balance input
TEL: 350mV/10K
REMOTE MIC: 387mV/10K
TONE Bass: 10dB at 100Hz
Treble: 10dB at 100Hz
12
>65dB
1%
>
750W
SD FILE SYSTEM Only FAT16, FAT32, the biggest one partition,
does not support folder to store

100
Over
100
Over
Over
100
11. DIMENSIONAL DIAGRAM
UNIT :mm
6
128
128
25
440
415
132
148
436
484
UNIT :mm
13
SD/MEDIA
POWER EQ
MODE VOL+
NEXT
PP/SCAN VOL- PREV
97.60
MONITOR
MUTE
MUTE MUTE MUTE MUTE MUTE
Z1
Z1 Z1 Z1 Z1 Z1
Z2
Z2 Z2 Z2 Z2 Z2
Z3
Z3 Z3 Z3 Z3 Z3
Z4
Z4 Z4 Z4 Z4 Z4
LEVEL LEVEL LEVEL LEVEL LEVEL
POWER
/PROT
CH 5
CH 4CH 3CH 2
CH 1
BASS BASS BASS BASS BASSTREBLE TREBLE TREBLE TREBLE TREBLE
-10 -10 -10 -10 -10-10 -10 -10 -10 -10+10 +10 +10 +10 +10+10 +10 +10 +10 +10
ZONE 4ZONE 3ZONE 2
ZONE 1
MONMONMONMON
LEVELLEVELLEVELLEVEL
LEVEL
0dB0dB0dB0dB
0dB PROTPROTPROTPROT
CLIPCLIPCLIPCLIP
-5-5-5-5-7
-5
-3
-10-10-10-10-10
-15-15-15-15-15
00000
11111
22222
33333
44444 55555 66666
77777
88888
99999
1010101010
00000
11111
22222
33333
44444
55555
66666
77777
8 8 8 8 8
9 9 9 9 9
10 10 10 10 10
ON
OFF
4 ZONE MIXER AMPLIFIER
PX-4120
ZONE1
ZONE3
ZONE2
ZONE4
LINE OUT
LINE OUT
LINE OUT
LINE OUT
BAL. / UNBAL.
BAL. / UNBAL.
BAL. / UNBAL.
BAL. / UNBAL.
G
G
G
G
100V
100V
100V
100V
OUTPUT
OUTPUT
OUTPUT
OUTPUT
70V
70V
70V
70V
4
4
4
4
COM
COM
COM
COM
~220V 50-60Hz 800W
T8AL 250V
LL
RR
LINE
PHANTOM PHANTOM PHANTOM
LINE LINE LINEMIC MIC MIC
ZONE
TEL.
VOLUME GAINGAINGAINGAINGAIN CH 1CH 2
CH 3
CH 4CH5
REMOTE MIC INPUT
RS232
1W 8
T
MONITOR PRIORITY
FMANTGR
TEL.PAGING
LIFT GND
SD/MEDIA
POWER EQ
MODE VOL+
NEXT
PP/SCAN VOL- PREV
97.60
MONITOR
MUTE
MUTE MUTE MUTE MUTE MUTE
Z1
Z1 Z1 Z1 Z1 Z1
Z2
Z2 Z2 Z2 Z2 Z2
Z3
Z3 Z3 Z3 Z3 Z3
Z4
Z4 Z4 Z4 Z4 Z4
LEVEL LEVEL LEVEL LEVEL LEVEL
POWER
/PROT
CH 5
CH 4CH 3CH 2
CH 1
BASS BASS BASS BASS BASSTREBLE TREBLE TREBLE TREBLE TREBLE
-10 -10 -10 -10 -10-10 -10 -10 -10 -10+10 +10 +10 +10 +10+10 +10 +10 +10 +10
ZONE 4ZONE 3ZONE 2
ZONE 1
MONMONMONMON
LEVELLEVELLEVELLEVEL
LEVEL
0dB0dB0dB0dB
0dB PROTPROTPROTPROT
CLIPCLIPCLIPCLIP
-5-5-5-5-7
-5
-3
-10-10-10-10-10
-15-15-15-15-15
00000
11111
22222
33333
44444 55555 66666
77777
88888
99999
1010101010
0 0 0 0 0
1 1 1 1 1
2 2 2 2 2
3 3 3 3 3
4 4 4 4 4
5 5 5 5 5
66666
7 7 7 7 7
8 8 8 8 8
9 9 9 9 9
10 10 10 10 10
ON
OFF
4 ZONE MIXER AMPLIFIER
PX-4120

PUBLIC ADDRESS SYSTEM
VersionV0.1