Maintronic DPA4.150 User manual

1
1
service manual
DPA4.150 Digital Power Amplier
Channel 4
Channel 3
Channel 1
Channel 2
DPA4.150
DigitalPowerAmplifier
Fault Clip
Signal
On
VOLUME
Fault Clip
Signal
On
DC
230V AC
Fault Clip
Signal
On
Fault Clip
Signal On
VOLUME
VOLUME
VOLUME
Carl-Zeiss-Str. 10-14
97424 Schweinfurt / Germany
Tel. [phone]
Fax. [phone]
www.maintronic.de
[e-mail]
Version: 21.052019

2
Aenon!
For your own safety, read all instruc-
ons and informaon in this manual
carefully before inial operaon.
Keep this manual for future refe-
rence.
All informaon and instrucons in
this manual must be observed com-
pletely and in detail. The manufac-
tuer is not responsible for any direct
or consequenal damage that results
from disregarding any informaon in
this manual.
Remove mains power cord if the unit
is not used for a prolonged me.
Be sure to install the device only on
places with a good venlaon and
without humidity or high tempera-
tures
Danger!
The interior and the connectors of
the amplier holds hazardous volta-
ges.
The unit must only be installed and
serviced by a proven electrican spe-
cialist, in accordance of all relevant
regulaons, safety and accident pre-
venon direcves of the country.
To prevent electric shock, use only
mains sockets with hidden, touch-
proof contacts.
Make sure to use the correct supply
voltage, before operang the unit.
During operaon is a dangerous
high voltage present at the speaker
connecons. Disconnect the mains
power supply prior to connecon or
disassembly. If the loudspeaker out-
put is not in use make sure to cover
the connectors with the included
plasc housing.
An apparatus with CLASS I construc-
on shall be connected to a MAINS
socket outlet with L,N and an protec-
ve earthing connecon.
Install the device only on places with
a good venlaon and without humi-
dity or high temperatures.
Do not open the amplier. Otherwise
you will risk a damage and void the
warranty.
The unit should be serviced by
qualied personnel when the unit:
• objects have fallen or liquid has
been spilled into the unit
• does not appear to operate
normally
• has been dropped or has a
broken housing
Do not operate the system in a
humid enviroment. Do Not expose
the unit to rain or snow.
Do not operate the unit near heat
sources, e.g. radiators.
Safety instructions

1
3
Safety instructions
Always run the mains power cord in
a way that it cannot be pinched by
objects and that nobody can stum-
ble over it. Avoid sharp bends or
excessive tension on the mains cord,
parcularly at the cable exits.
Never pull at the cable or the plug to
diconnect the Unit from mains.
For cleaning only use a dry, so
cloth, by no means liquids.
Touch proof installaon
The unit must only be installed in a
closed 19-inch rack and has to be
mounted with four rack screws.
To ensure not to touch with bare
hands at the connectors the instal-
laon in a closed housing is necces-
sary.
Waste disposal
In accordance with European Direc-
ve 2002/96/EC (it`s) not longer usa-
ble electronic devices and defecve
or used baeries (European Direcve
2006/66EG)
must collected separately and dis-
posed by an environmentally sound
recycling.
This symbol indicates that electrical
and electronic equipment must be
disposed of separately from normal
waste at the end of its operaonal
lifeme.
Should these product are no longer
be useable, the user is required by
law to dispose of old appliances se-
parately from their household waste
e. g. at a local authority collecon
point or recycling center.

4system parts rear view
OUT 1 OUT 2 OUT 3
OUT 4
+IN 2
- IN 1
GND
+IN 1
- IN 2
Pilottone
GND
1
0 / 50V / 100V
0 / 50V / 100V
Bridge
B active
- IN 1/2 B
+IN 1/2 B
GND
Address
auto ON
SENS
0 / 50V / 100V0 / 50V / 100V
+IN 4
- IN 3
GND
+IN 3
- IN 4
Pilottone
GND
- IN 3/4 B
+IN 3/4 B
GND
6
to next Amp
Bridge
B active
Input 1/2 Input 3/4
1
2
2
3
4
5
1
2 3
465
9
7 8
WARNING: TO REDUCE THERISK
OF FIRE OR ELECTRIC SHOCK
DO NOT EXPOSE THIS APPLIANCE
TO MOISTURE.TO MAKE ALL
CONNECTIONS PROPER,
PLEASE SEEUSERS MANUAL.
RISK OF ELECTRIC SHOCK
DO NOT OPEN
DC IN
50-60Hz,750VA
+
24V
48V
DPA4.150
maintronic germany
S.Nr.
230V/6,3A /M
100V 300W Bridge
~
BRIDGE CONNECTIONS ARE
ONLY ALLOWED AS SHOWN
100V 300W Bridge 100V 300W Bridge
CH 3/4 ok
DC ok
AC 230 ok
CH 1/2 ok
Controll
Control
+
-
-
+
+
+
+
12-24V
B 1-4 ON
+
-
-
Rs485 /
Power Delay Link
12-24V
CH1-4 ON
(1) IEC plug - power supply 230V AC
(2) DC-In plug-in screw terminal block 2 pin
(3) Loudspeaker outputs 50 / 100V
Out 1 ... Out 4
plug-in screw terminal block 2 pin
Legend / Explanaon:
ok Monitoring-Contact open aer error
Piloone Input for a piloone
+IN / -IN Symmetrical input
+IN / GND Unsymmetrical input
CH1-4 ON / B1-4 ON Audio-Channel-Remote with an external DC Voltage
Bridge/ B-acvate Acvate the IN1/2B (IN3/4B) bridge input

1
5
system parts rear view
OUT 1
OUT 2 OUT 3 OUT 4
+IN 2
- IN 1
GND
+IN 1
- IN 2
Pilottone
GND
1
0 / 50V / 100V0 / 50V / 100V
Bridge
B active
- IN 1/2 B
+IN 1/2 B
GND
Address
auto ON
SENS
0 / 50V / 100V
0 / 50V / 100V
+IN 4
- IN 3
GND
+IN 3
- IN 4
Pilottone
GND
- IN 3/4 B
+IN 3/4 B
GND
6
to next Amp
Bridge
B active
Input 1/2 Input 3/4
1
2
2
3
4
5
1
2 3
465
9
7 8
WARNING: TO REDUCE THERISK
OF FIRE OR ELECTRIC SHOCK
DO NOT EXPOSE THIS APPLIANCE
TO MOISTURE.TO MAKE ALL
CONNECTIONS PROPER,
PLEASE SEEUSERS MANUAL.
RISK OF ELECTRIC SHOCK
DO NOT OPEN
DC IN
50-60Hz,750VA
+
24V
48V
DPA4.150
maintronic germany
S.Nr.
230V/6,3A /M
100V 300W Bridge
~
BRIDGE CONNECTIONS ARE
ONLY ALLOWED AS SHOWN
100V 300W Bridge
100V 300W Bridge
CH 3/4 ok
DC ok
AC 230 ok
CH 1/2 ok
Controll
Control
+
-
-
+
+
+
+
12-24V
B 1-4 ON
+
-
-
Rs485 /
Power Delay Link
12-24V
CH1-4 ON
(4) Auto Sens gain sensivity
(5) communicaon adress (oponal)
(6) Monitoring-Contacts -
plug-in screw terminal block
12pin
(7) Input 1 and 2 -
plug-in screw terminal block
12pin
(8) Input 3 and 4 -
plug-in screw terminal block
12pin
(9) RJ45 socket for RS485 Bus
communicaon and
Power-Delay-Link
(6) (7) (8)
plug-in screw terminal block
+ CH 1/2 ok + IN 1 + IN 3
CH 1/2 ok GND GND
+ CH 3/4 ok - IN 1 - IN 3
CH 3/4 ok + IN 2 + IN 4
+ DC 24V ok GND GND
DC 24V ok - IN 2 - IN 4
+ AC 230V ok Piloone Piloone
AC 230V ok +IN 1/2 B +IN 3/4 B
+ 12-24V CH1-4 ON GND GND
- 12-24V CH1-4 ON - IN 1/2 B - IN 3/4 B
+ 12-24V B 1-4 ON Bridge Bridge
- 12-24V B 1-4 ON B-acve B-acve
The Monitoring-Contacts are opto-couplers with a max load of 24V 10mA.
Keep aenon for the correct polarity.
All controls are normal closed by meaning ok.

6installation
Install the unit proper in a 19-inch rack with four rack screws.
Make sure to have enough space for air circulaon.
Connect the NF-inputs and outputs with the according plug connectors.
The input can be used symmetrical or unsymmetrical.
Important is, to check the right connecon of the ground (shield) and signal.
Apply all the connectors as well as loudspeakers and monitoring contact.
At least connect the IEC plug - power supply 230V AC
Check all wiring and fasten them to the rack housing.
Aer turn-on of the amplifer, the Power LED glows.
Channel 4
Channel 3
Channel 1
Channel 2
DPA4.150
DigitalPowerAmplifier
Fault Clip
Signal On
VOLUME
Fault Clip
Signal On
DC
230V AC
Fault Clip
Signal
On
Fault Clip
Signal On
VOLUME
VOLUME
VOLUME
Front view
LED-Indicators front:
Fault : amplier block error, see trouble shoong next page
On : amplier block ready
Clip: input signal to high
Signal: input signal is present
24V DC: shows present accu voltage (working range 18-28V)
230V AC: main power is present
Level Control:
Level: input gain level Input 1-4 (not for Input B or Piloone)

1
7
installation
Connecon mono mode - for IN1, IN2, IN3 and IN4
Connecon bridged mode - for IN 1/2 B and IN 3/4 B
Aenon when using bridged mode:
Bridge connecons are only allowed as shown.
Please make sure not to connect otherwise as in the below picture shown.
A dangerous high voltage may remain at the output connectors.
Other type of wirings are not allowed.
OUT 1
0 / 50V / 100V
OUT 1 OUT 2
0 / 50V / 100V0 / 50V / 100V
+IN
1
GND
-IN 1
Signal
1
Input
1
+IN
1
GND
-I
N1
+
GND
Amp
Source
+IN 1/2 B
GND
-IN 1/2 B
Bridge
B activ
e
Signal
Input
Symmetrical connecon
100 V / Σ 150 W / 66 Ω
(50 V / 16 Ω)
100 V / Σ 300 W
33Ω
Unsymmetrical connecon

8installation
Auto-ON:
Opon 1:
Amplier channels 1-4 can turned-ON when a
audio NF signal is present at the inputs.
Each channel use the own Input.
Input signal sensivity can be adjusted with
the SENS-control (4). Sensivity 7-300mV
Opon 2:
If the SENS-control-encoder is turned to the right posion, the amplier is
always ON.
Opon 3:
If the SENS-control-encoder is turned to the le posion, the Auto-ON
funcon is OFF and the amplier can only be acvated with remote.
Audio-Channel-Remote (CH 1-4 ON)
Channels 1-4 can remotely turned-ON and OFF with an external DC-Power.
Turn the SENS-control-encoder to the le posion.
Connect a 12-24 V DC-Power to the CH1-4 ON contact
at plug (6) to remote-ON the Inputs 1-4.
As long as the DC-Power is present, the Inputs 1-4 are ON.
Bridged-mode-Remote (B 1-4 ON)
Use the B1-4 ON contact on plug (6) for remote-ON the
Bridge mode channels IN 1/2 B and IN 3/4 B.
Connect a 12-24 DC-Power to the B1-4 ON contact at plug (6)
to remote-ON all bridge channels B 1/2 and B 3/4.
Once the Input B is acve all Inputs IN1, IN2, IN3 and IN4
are deacvated. The SENS-control has no inuence to B 1-4 ON.
As long as the DC-Power is present, the Inputs B are ON.
OUT 1 OUT 2 OUT 3 OUT 4
+IN 2
- IN 1
GND
+IN 1
- IN 2
Pilottone
GND
1
0 / 50V / 100V0 / 50V / 100V
Bridge
B active
- IN 1/2 B
+IN 1/2 B
GND
Address
auto ON
SENS
0 / 50V / 100V0 / 50V / 100V
+IN 4
- IN 3
GND
+IN 3
- IN 4
Pilottone
GND
- IN 3/4 B
+IN 3/4 B
GND
6
to next Amp
Bridge
B active
Input 1/2 Input 3/4
1
2
2
3
4
5
1
2 3
465
9
7 8
WARNING: TO REDUCE THERISK
OF FIRE OR ELECTRIC SHOCK
DO NOT EXPOSE THIS APPLIANCE
TO MOISTURE.TO MAKE ALL
CONNECTIONS PROPER,
PLEASE SEEUSERS MANUAL.
RISK OF ELECTRIC SHOCK
DO NOT OPEN
DC IN
50-60Hz,750VA
+
24V
48V
DPA4.150
maintronic germany
S.Nr.
230V/6,3A /M
100V 300W Bridge
~
BRIDGE CONNECTIONS ARE
ONLY ALLOWED AS SHOWN
100V 300W Bridge 100V 300W Bridge
CH 3/4 ok
DC ok
AC 230 ok
CH 1/2 ok
Controll
Control
+
-
-
+
+
+
+
12-24V
B 1-4 ON
+
-
-
Rs485 /
Power Delay Link
12-24V
CH1-4 ON
Always
ON
OFF only
remote
SENS

1
9
installation
+IN 2
- IN 1
GND
+IN 1
- IN 2
Pilottone
GND
Bridge
B active
- IN 1/2 B
+IN 1/2 B
GND
+IN 4
- IN 3
GND
+IN 3
- IN 4
Pilottone
GND
- IN 3/4 B
+IN 3/4 B
GND
Bridge
B active
Input 1/2 Input 3/4
78
Piloone:
Uncontrolled Piloone without
any Filter or Frequency.
Use the following contacts:
Piloone plug (7) for IN 1/2
Piloone plug (8) for IN 3/4
Sensivity 1V = 3V at the outputs
Inputs
SENS acve
IN 1 IN 2 Pilot
1/2
B1/2 IN 3 IN 4 Pilot
3/4
B3/4
Auto ON 7-300mV
Opon 1
CH 1
ON
CH 2
ON
CH 1/2
ON OFF CH 3 ON
CH 4
ON
CH3/4
ON OFF
Auto ON IN 1 CH 1
ON OFF OFF OFF OFF OFF OFF OFF
Auto ON IN 2 OFF CH 2
ON OFF OFF OFF OFF OFF OFF
Auto ON IN 3 OFF OFF OFF OFF CH 3
ON OFF OFF OFF
Auto ON IN 4 OFF OFF OFF OFF OFF CH 4
ON OFF OFF
Pilot 1/2 OFF OFF CH 1/2
ON OFF OFF OFF OFF OFF
Pilot 3/4 OFF OFF OFF OFF OFF OFF CH 3/4
ON OFF
SENS deacvated IN 1 IN 2 Pilot
1/2
B1/2 IN 3 IN 4 Pilot
3/4
B3/4
Always ON
Opon 2
CH 1
ON
CH 2
ON
CH 1/2
ON OFF CH 3 ON
CH 4
ON
CH 3/4
ON OFF
Audio-Channel-Remote
CH 1-4 ON - Opon 3
CH 1
ON
CH 2
ON
CH 1/2
ON OFF CH 3 ON
CH 4
ON
CH 3/4
ON OFF
Bridged-mode-Remote
B 1-4 ON OFF OFF CH 1/2 ON
CH 1/2
ON OFF OFF CH 3/4 ON
CH 3/4
ON
B-acve
1/2 OFF OFF OFF CH 1/2 ON
CH 3
ON
CH 4
ON
CH 3/4
ON OFF
B-acve
3/4
CH 1
ON
CH 2
ON
CH 1/2
ON OFF OFF OFF OFF CH 3/4 ON
Auto-ON funcon diagram, shows the Inputs and the acvity of each channel.

10
OUT 1 OUT 2 OUT 3 OUT 4
+IN 2
- IN 1
GND
+IN 1
- IN 2
Pilottone
GND
1
0 / 50V / 100V0 / 50V / 100V
Bridge
B active
- IN 1/2 B
+IN 1/2 B
GND
Address
auto ON
SENS
0 / 50V / 100V0 / 50V / 100V
+IN 4
- IN 3
GND
+IN 3
- IN 4
Pilottone
GND
- IN 3/4 B
+IN 3/4 B
GND
6
to next Amp
Bridge
B active
Input 1/2 Input 3/4
1
2
2
3
4
5
1
2 3
465
9
7 8
WARNING: TO REDUCE THERISK
OF FIRE OR ELECTRIC SHOCK
DO NOT EXPOSE THIS APPLIANCE
TO MOISTURE.TO MAKE ALL
CONNECTIONS PROPER,
PLEASE SEEUSERS MANUAL.
RISK OF ELECTRIC SHOCK
DO NOT OPEN
DC IN
50-60Hz,750VA
+
24V
48V
DPA4.150
maintronic germany
S.Nr.
230V/6,3A /M
100V 300W Bridge
~
BRIDGE CONNECTIONS ARE
ONLY ALLOWED AS SHOWN
100V 300W Bridge 100V 300W Bridge
CH 3/4 ok
DC ok
AC 230 ok
CH 1/2 ok
Controll
Control
+
-
-
+
+
+
+
12-24V
B 1-4 ON
+
-
-
Rs485 /
Power Delay Link
12-24V
CH1-4 ON
1
2
Rs485 /
Power Delay Link
1
2
Rs485 /
Power Delay Link
1
2
Rs485 /
Power Delay Link
Power-Delay-Link:
Use the RJ45 sockets for a
Sequenal-Power-ON of the amplifers
with a delay to protect the mains.
Link the ampliers with RJ45 Patch cable.
Once a Power-ON request starts, the
ampliers start-up one aer the other,
approx. 2 seconds per device.
Important:
For the rst amp use the RJ45 - 2 =OUT,
to the next amp RJ45 - 1 = IN.
installation

1
11
technical data DPA4.150
measuring condion Data
Supply voltage AC 220-240 V AC, 50/60 Hz
Supply voltage DC 24V (20 - 28V DC) oponal
48V (42 - 58V DC)
Peakpower
(at 230V~ power supply) 66 Ohm/33 Ohm 100V 4x150W 2x300W
THD+N 1kHz 50W 0,2%
Frequency response speech -3dB 90Hz - 10kHz
Frequency response music -3dB 80Hz - 20kHz
Input sensivity 1kHz 1V e
Input impedance 1kHz 10Kohm
Signal-to-noise rao 1kHz; 50W; Vol 0.5 85dB
Autosense On -45dB
Electronically balanced inputs 1 input each channel
Oponal transducer potenal-free
Starng current 230V AC 11A with NTC
recovery me 70 sec.
Starng current with
R 10Ohm (as an opon) 230V AC 6A (500mS) with R recovery me 1 sec
Power consumpon
Standby 24V DC 0,16A 3,8W
Standby 230V AC 0,045A 10W
Full load 24V DC Sinus signal 27A
Full load 230V AC Sinus signal
100V 66 Ohm 3,7A
Sequenal-Power-ON Power Delay approx. 2 seconds per device
Connectors
Input connectors plug-in screw terminal block 12 pin
Output connectors plug-in screw terminal block 3 pin
DC In plug-in screw terminal block 2 pin
Power supply 230V IEC plug - power supply 230V AC
Potenal-free outputs with optocouplers max. 24V DC, 10mA (serial connecon possible)
Auto Sense NF-Input >-50dBm (70Hz-20kHz Auto Sense)
Remote ON Ch. On/O throught remote contact; 12V - 24V DC, ca. 10mA
RS485 (oponal) RJ45 connectors
Cooling convecon cooling + speed-controlled fan
Weight 16,5kg
Dimension 19“ 2RU (482x88x280 mm)

12

1
13
block wiring diagram

14 trouble shooting
Fault LED glows:
The amplier is to hot (heatsink is over 80°) or
a short circuit is present at the loudspeaker outputs
LED should turned o aer disconnecng the loudspeaker
Humming noise:
1: Check Input Ground connectors
2: throught the PE conductor connecons of dierent devices
a ground loop can ocure
Signal is distorted:
1. turn down the level input gain
2. reduce and check input signal

1
15
notes
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16
Made in Germany
Mistakes and typing errors reserved. All rights reserved.
Documentno.: maintronic_DPA4_150_manual_EN_20161116
97424 Schweinfurt
MTC maintronic GmbH
www.maintronic.de
Carl-Zeiss-Str. 10-14
Fax [phone]
Tel [phone]
Germany
inf[email protected]