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DigiMod 2004PFC2
user manual rev. 1.0
© 2012 - 2013 Powersoft powersoft_dm2004PFC2_uguide_en_v1.1
Keep This Manual For Future Reference
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DigiMod 2004PFC2
User Manual
Table of contents
1 Welcome
2 Unpacking & checking for shipping damage
3 Disposal of the packing material
4 Important safety instructions
5 Precautions regarding installation
5.1 Location
5.2 Wiring
5.3 Fire and liquids
6 Thermal constrains
7 Mechanical Drawing
8 Main connections
9 Surface components layout
9.1 Bill of connectors
10 Main connectors pinout
10.1 PL 8 Pinout
10.2 PL 13 Pinout
10.3 PL21 pinout
11 Audio path block diagram
12 Internal signal path polarity
13 Protections
13.1 Power supply protections
13.2 Amplifier protections
13.3 Harmful signal protections
13.4 Auxiliary power protections
13.5 Control Board protection LEDs
14 LED chart
14.1 Control Board LED chart
14.2 Main Board LED chart
15 Service
16 Warranty
16.1 Return of Goods
16.2 Repair or replacement
16.3 Cost and responsibility of transport
17 Assistance
18 Specifications
3
4
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DigiMod 2004PFC2
User Manual
1 Welcome
Congratulations on your purchase of the Powersoft
DigiMod 2004PFC2 module.
We know you are eager to use the DigiMod 2004PFC2 module, but please take a moment to read this user’s manual and safety instructions. In case you have any questions, please do not hesitate to contact your dealer or Powersoft.
The DigiMod 2004PFC2 is a two channel amplifier modules specifically designed to drive high power loudspeakers such as woofers, subwoofers and 2-way line arrays.
The DigiMod 2004PFC2 represents an important evolution in the DigiMod Series family of products: delivering up to 1000 W on 4 � per channel (2000 W on 8 � in mono-bridged mode), the
DigiMod 2004PFC2 reaches a new level of excellence in terms of power consumption and sonic performance.
The Class D fixed frequency design of the pulse width modulation ensures maximum performances, high predictability and total immunity from intermodulation artifacts.
DigiMod 2004PFC2 is fully compatible with all existing
Powersoft DSP solutions providing a powerful and flexible signal processing tools on board of your loudspeaker.
The new design of the power supply equipped with PFC and Smart Rails Management reduces power consumption and enhances reliability and consistency in all operating conditions.
The DigiMod 2004PFC2 shares the same compact mechanical layout of the other DigiMod Series models guaranteeing scalability to existing and future
2 Unpacking & checking for shipping damage
Your Powersoft product was completely tested and inspected before leaving the factory. Carefully inspect the shipping package before opening it, and then immediately inspect your new product.
If you find any damage notify the shipping company immediately.
3 Disposal of the packing material
The transport and protective packing has been selected from materials which are environmentally friendly for disposal and can normally be recycled.
Rather than just throwing these materials away, please ensure they are offered for recycling.
5
4 Important safety instructions
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
!
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK,
DO NOT ATTEMPT TO OPEN ANY PART OF THE UNIT. NO
USER-SERVICEABLE PARTS INSIDE. REFER SERVICING TO
QUALIFIED SERVICE PERSONNEL.
WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC
SHOCK, DO NOT EXPOSE THIS APPARATUS TO RAIN OR
MOISTURE. OBJECTS FILLED WITH LIQUIDS, SUCH AS VAS-
ES, SHOULD NOT BE PLACED ON THIS APPARATUS.
CHECK PROPER CHASSIS EARTH CONNECTION
BEFORE OPERATE.
SAFEGUARDS: This unit has been engineered and manufactured to assure your personal safety. Improper use can result in potential electrical shock or fire hazards. In order not to defeat the safeguards, observe the following instructions for its installation, use and servicing.
f Read these instructions.
f Keep these instructions.
f Heed all warnings.
f Follow all instructions.
f Do not use this amplifier near water.
f Clean only with a dry cloth.
f Ensure a proper ventilation. f Install in accordance with Powersoft’s instructions.
f Do not install near any heat sources or apparatus that produce heat.
f Only use attachments/accessories specified by Powersoft.
EXPLANATIONS OF GRAPHICAL SYMBOLS
The Lightning Flash with arrowhead symbol within an equilateral triangle is intended to alert the user to the presence of uninsulated “dangerous voltage” within the product enclosure that may be of sufficient magnitude to constitute a risk of shock to persons.
The Exclamation Point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the product.
NOTES: This equipment has been tested and found to comply by Competent Body (Directive 2004 /108 / EC) pursuant to the product family standard for audio professional use: f EN 55103-1 and EN 55103-2 standard (with the limits for E4 and E5 electromagnetic environment); f EN 61000-3-2 and EN 61000-3-3 standard.
6
This equipment has been tested and found to comply by Notified
Body 2014 (Directive 2006 / 95 / EC) pursuant to the audio apparatus safety requirements: Standard EN 60065.
This amplifier is intended to be installed inside other devices and must be checked in the final product.
5 Precautions regarding installation
5.1 Location
Install the amplifier in a ventilated enclosure (IP20 at least), where it will not be directly exposed to high temperature or humidity.
Do not install the amplifier in a location that is exposed to direct rays of the sun, or near to hot appliances or radiators. Excessive heat can adversely affect the operation and internal components.
Installation of the module in a damp or dusty environment may result in malfunction or accident.
Placing and using the amplifier for long periods on heatgeneration sources will affect performances. Avoid placing the amplifier on heat-generating sources. Install this amplifier as far as possible from tuners and TV sets. An amplifier installed in close proximity to such equipment may cause noise or degradation of the picture.
5.2 Wiring
This device must be powered exclusively by earth connected mains sockets in electrical networks compliant to the IEC 364 or similar rules. Is absolutely necessary to verify this fundamental requirement of safety and, in case of doubt, require an accurate check by a qualified personal.
Is absolutely necessary to ground this device using the proper earth connection on the metal frame of the chassis; use M4 nut and bolt with proper split washer – Grover washer – to secure the earth terminal lug.
POWERSOFT cannot be considered responsible for eventual damages caused to persons, things or data for the missing of accurate earth link.
Provide the installed unit with bipolar switch to unconnect both mains connection with at least 3 mm – 118 mil – of distance between switch contacts.
Before powering this device verify that the module is supplied with the correct voltage rating.
Verify that your mains connection is capable to satisfy the power ratings of the device.
Do not use this unit if the electrical power cord is frayed or broken. Do not remove the cover. Removing the cover will expose you to potentially dangerous voltage.
The amplifier itself, its input mains and output power connection wirings must not to be accessible to the final user.
model.
EMC filter shall be mounted on AC MAINS power supply wiring. Powersoft suggest the Schaffner FN2030-10-06
100 mm
3.94 inch
MIN.
5.3 Fire and liquids
Do not spill water or other liquids into or on the unit.
No naked flame sources such like lighted candles should be placed on the module.
The enclusure apparatus shall be designed so that the start and spread of fire is prevented as much as possible , and shall not give rise to danger of fire to the surrounding of the apparatus. This is achieved as follows: f by using good engineering practice in design and production of the enclosure apparatus to avoid potential ignition sources; f by using materials of low flammability for internal parts in the vicinity of potential ignition sources; f by using fire enclosures to limit the spread of fire.
Be aware of magnetic leakage
a
Chimney effect improves air flow
6 Thermal constrains
This device must be correctly heatsinked for proper and reliable operation.
Cooling of the DigiMod 2004PFC2 is achieved by means of the built-in fan cooler which shall be improved by assembling to the module’s chassy a proper external passive heat sink.
The built-in fan cooler (80x80 mm, 24 V dc
) and an appropriate external heat sink guarantee by design thermal efficiency and reliability up to 50°C enviromental temperature with 6 dB power crest factor program operation, both channels driven on 4 � load.
Proper heatsink planarity is strongly suggested to allow thermal transfer from the bottom plate to the heat sink; thermal compound is recommended.
In case of installation inside of loudspeaker enclosure, proper spacing of at least 100 mm is necessary between the frame of the unit and side components or surfaces of the enclosure.
The module has been designed to fit into a loudspeaker cabinet:
please refer to FIGURE 1 for proper module placing.
IN FIGURE 1 HEATSINK FINS ARE SET HORIZONTALLY
(WRONG!) ONLY FOR DESCRIPTIVE PURPOSE.
All configuration showed in FIGURE 1 are viable for proper
module placing and cooling.
In FIGURE 1.a the module and the loudspeakers share the same
chamber into the cabinet. This is the dafault placement solution: it allows good ventilation because of woofer diaphragm movement and high air volume; be aware of magnetic field interaction: place the module far enough from loudspeakers magnet in order to prevent fan blockage.
b
Do not obstruct air flow
Be aware of air leakage
c
FIGURE 1: Module cooling solutions (for descriptive purpose heatsink fins are set in wrong direction); a) Module and loudspeaker into the same chamber; b) Module in a separate sealed chamber; c) Module in a separate vented chamber.
In FIGURE 1.b the module is placed in a separate chamber: we
suggest to cut holes in front of the fan and on the top and bottom surfaces of the chamber. Thanks to the holes, the fan takes fresh air from the loudspeakers volume and blows it inside the module; the warm air flows outside the module’s chamber helped by the chimney effect.
FIGURE 1.c shows the more efficient cooling configuration, but
is less effective against dust and moisture that can get into the module and damage it. By allowing external air flow, it is possible to reduce the fins width on the heat sink by maintaining good cooling performances.
7
M3 THREADED HOLE
FIGURE 2: DigiMod 2004PFC2 mechanical drawings.
All dimensions in millimiters.
Faston Faston
6.3 x 0.8 mm
Faston Faston
6.3 x 0.8 mm
Faston Faston
6.3 x 0.8 mm
HOT Parallel input
FIGURE 3: DigiMod 2004PFC2 – AC MAINS and audio output wiring.
HOT
Channel 1
COLD
HOT
GND
Channel 2
HOT Parallel input
FIGURE 4: DigiMod 2004PFC2 – two input channels wiring.
FIGURE 5: DigiMod 2004PFC2 – parallel input wiring.
Mono
Bridge
Mono
Bridge
HOT
Channel 1
COLD
HOT
GND
Channel 2
9 Surface components layout
10
9.1 Bill of connectors
CODE
PL18
PL19
PL20
PL8
SO5
PL21
PL2
PL17
PL13
PL23
PL22
PL7
NAME
DSP/external circuit board socket
Input connector
Test Connector (reserved)
Signal OUT 1 +
Signal OUT 1 – (GND)
Signal OUT 2 –
Signal OUT 2 + (GND)
Bypass Channel 1
Bypass Channel 2
FAN
FAN
FAN
TYPE
72-pin SIMM Socket
IDC flat cable 34 ways
IDC flat cable 20 ways
Faston 6.3x0.8 mm Male
Faston 6.3x0.8 mm Male
Faston 6.3x0.8 mm Male
Faston 6.3x0.8 mm Male
Molex 22-27-2031
Molex 22-27-2031
Molex 22-27-2031
10 Main connectors pinout
The following image and tables show the pinout of main input and output connectors PL8, PL13, PL21 and the SIMM board.
FIGURE 6 shows the default jumpers configuratin for PL8
and PL13 connectors. By means of these jumpers it is possible to change the main gain and enable the DSP and external circuits.
Gain at +38dB is intended for low level inputs which need more boost, such as consumer devices; take care on raising the gain since this involves more noise at output stages.
DSP and external circuits – such as filters or volume regulators – can be independently activated by removing related jumpers on
PL8 and PL13. Both DSP and external circuits can be layed on a
72-pin SIMM board which would be plugged into the SO5 socket; for more informations about SIMM specifications, please contact
Powersoft. SIMM board pinout is shown on FIGURE 7.
38.99
PL8
PL21
Remove jumper to insert external circuit
Remove jumper to enable DSP
Place jumper to switch gain to 38 dB
PIN 1
Jumpered
Not jumpered
Place jumper to switch gain to 38 dB
PL13
Remove jumper to enable DSP
Remove jumper to insert external circuit
FIGURE 6: DigiMod 2004PFC2 main connectors pinout.
36 +5VDC
35 +12VDCOUT
34 –12VDCOUT
33 GND
32 –VCCMON
31 GND
30 +VCCMON
29 GND
28 TEMPMON
27
26 RESERVED
25
24
23
22 GND
21 RESERVED
20 RESERVED
19 RESERVED
18 RESERVED
17
16
15 RESERVED
14 RESERVED
13 RESERVED
12 RESERVED
11 PROTECT1
10 IOUT1MON
09 EARECT1
08 BY41
07 BY21
06 BY11
05 IN 1–
04 IN 1+
03 GND
02 GND
01 OUT 1+
72 OUT 2–
71 GND
70 GND
69
68
67
66
65
IN 2 +
IN 2 –
BY 12
BY 22
BY 42
64 EARECT2
63 IOUT2MON
62 PROTECT2
61
60
59
58 MUTE
57
56
55
54
53
52 SDPWS
51 GND
50
49
48
47
46 RESERVED
45 TEMPMON
44 GND
43 +VCCMON
42 SYNC CH
41 –VCCMON
40 GND
39 –12VDCOUT
38 +12VDCOUT
37 +5VDC
Thickness: 1.27 mm
FIGURE 7: 72-pin SIMM board pinout; dimensions in millimiters.
10.1 PL 8 Pinout
Pin# Name
1 BY31
2-3
4-5
6
BY41
BY21
BY11
IN l l
OUT l l
Impedance Description
2.7 k� + 47 �
32dB gain
2.7 k� + 47�
38dB gain
5.4 k� + 47 �
Channle 1
Unbalanced Intput
Channle 1
Unbalanced Output
47 �
Channle 1
Unbalanced Input
Channle 1
Unbalanced Output
10.2 PL 13 Pinout
Pin# Name
1 BY12
2-3 BY22
4-5
6
BY42
BY32
IN l l
OUT l l
Impedance Description
47 �
2.7 k� + 47 �
Channle 2
Unbalanced Output
Channle 2
Unbalanced Input
32dB gain
2.7 k� + 47�
38dB gain
5.4 k� + 47 �
Channle 2
Unbalanced Output
Channle 2
Unbalanced Input
11
10.3 PL21 pinout
PIN#
1
4
5
2
3
Name
SDPWS
RESERVED
RESERVED
RESERVED
GND
IN l
OUT POWER Range
Active High,
Logic input 3.3 to 12 V dc
Scale factor
Imped- ance
1 k�
Protected
Logic input to be fed by
“OR” diode
Tolle- rance
Description
Power Supply Shut Down
6
7
IN 1 +
IN 1 –
8
9
GND
VOUT1MON
10 PROTECT1
11
12
IOUT1MON
TEMPMON
13 +12VDCOUT
14 -12VDCOUT l l
15
16
17
MUTE
+VCCMON
-VCCMON l l l l l l l l
1.92 V
7 V
Unbalanced rms
for Full Output; rms
Absolute Max Input
0.96 V rms
3.5 V rms
Balanced
for Full Output;
Absolute Max Input
1.92 V
7 V
Unbalanced rms
for Full Output; rms
Absolute Max Input
0.96 V rms
3.5 V rms
Balanced
for Full Output;
Absolute Max Input
10 k�
10 k� l l l
20
V
/
V
4.5 k�
Level 1
(2 to 10) = not in
Protection
Level 0 (0 to 1) =
Protection
100 k�
0 – 5 V
+12 V dc
; 0.5 A max output current available
7.5
A
/
V
See table
4.5 k�
7 k�
–12 V dc
; 0.5 A max output current available
Active Low,
To be pulled to GND by current sink of at least
20 mA
+7.5 V dc
–7.5 V dc
4.5 k�
4.5 k�
Polyswitch
Polyswitch
Ground
Channel 1
Positive Balanced Input
32 dB
Input To Output Overall
Gain
Channel 1
Negative Balanced Input
32 dB
Input To Output Overall
Gain
Ground
Channel 1
Output Voltage Monitor
Channel 1
Output Stage Protection
Monitor
±5%
±5%
Channel 1
Output Current Monitor
NTC sensor tap output
Positive regulated analog section supply
(same as pin 22)
Negative regulated analog section supply
(same as pin 21)
CH1 and CH2
Output Stage Mute
(disable output stages PWM)
Rail Bus Positive Monitor
Rail Bus Negative Monitor
Table continues on the next page...
12
...continued from previous page.
PIN#
18
19
Name
-VCCMON
+VCCMON
20
21 -12VDCOUT
22 +12VDCOUT
23
24
TEMPMON
IOUT2MON
25
26 VOUT2MON
27 GND
28
29
30
31
32
33
34
MUTE
PROTECT2
IN 2 –
IN 2 +
GND
RESERVED
RESERVED
RESERVED
SDPWS
IN l l l l
OUT POWER l l l l
Range
–7.5 V dc
+7.5 V d
Active Low,
To be pulled to GND by current sink of at least
20 mA
–12 V dc
; 0.5 A max output current available
+12 V dc
; 0.5 A max output current available
Scale factor
Imped- ance
4.5 k�
4.5 k� l l
0 – 5 V
See table
7.5 A /
V
7 k�
4.5 k� l
Level 1
(2 to 10) = not in
Protection
Level 0 (0 to 1) =
Protection
100 k� l
20 V /
V
4.5 k� l
1.92 V
7 V
Unbalanced rms
for Full Output; rms
Absolute Max Input
0.96 V rms
3.5 V rms
Balanced
for Full Output;
Absolute Max Input
1.92 V
7 V
Unbalanced rms
for Full Output; rms
Absolute Max Input
0.96 V rms
3.5 V rms
Balanced
for Full Output;
Absolute Max Input
10 k�
10 k� l
Protected
Polyswitch
Polyswitch
Active High,
Logic input 3.3 to 12 V dc
1 k�
Logic input to be fed by
“OR” diode
Tolle- rance
Description
±5%
±5%
Rail Bus Positive Monitor
Rail Bus Negative Monitor
CH1 and CH2
Output Stage Mute
(disable output stages PWM)
Negative regulated analog section supply
(same as pin 21)
Positive regulated analog section supply
(same as pin 22)
NTC sensor tap output
Channel 2
Output Current Monitor
Channel 2
Output Stage Protection
Monitor
Channel 2
Output Voltage Monitor
Ground
Channel 2
Negative Balanced Input
32 dB
Input To Output Overall
Gain
Channel 2
Positive Balanced Input
32 dB
Input To Output Overall
Gain
Ground
Power Supply Shut Down
13
11 Audio path block diagram
IN 2 +
IN 2 –
47 Ohm
470p
IN 2 +
IN 2 –
47 Ohm
470p
10K
10K
10K
10K
IN 1 +
470p
47 Ohm
IN 1 –
470p
47 Ohm
IN 1 +
IN 1 –
JR3
JR4
3
4
1
2
5
6
BY12
BY22
BY42
BY32
47 Ohm 47 Ohm
BY11
BY21
BY41 2
BY31 1
6
5
4
3
JR2
JR1
+VCC
G
2K7
47 Ohm
2.7k
PWMCH2 PWMCH1
47 Ohm
2.7k
2K7
G
+VCC
OUT 2 –
GATE4
GATE3
GATE1
GATE2
OUT 1 +
G G
CONTROL BOARD
-VCC -VCC
FIGURE 8: Audio path block diagram.
12 Internal signal path polarity
In order to increase the power’s supply energy storage efficiency, signals coming from channels 1 and 2 are polarity reversed one with respect to the other when entering the amplifier. This ensures a symmetrical use of the voltage rails: if, for example, both channels’ 1 and 2 input signals are going through a peak at the same time, channel 1’s energy will come from the positive voltage rails while channel 2, whose polarity is reversed with respect to channel 1, will be fed energy from the negative voltage rails. In this manner, the power supply will work symmetrically, with one channel catered by the positive rails and the other by the symmetrical negative rails. Channel 2’s signal will be polarity reversed once more to ensure that both channels output with the same polarity as their corresponding input signals.
For this reason it is very important not to invert the polarity of either channels before feeding them to the module. A double polarity inversion (the first by the user inserting the input signal and the other by the amplifier’s internal circuitry) results in no inversion at all. If this were the case, both channels would be weighing on only one side (positive or negative) of the power supply’s voltage rails. This would result in an inefficient use of the power supply’s energy.
Please pay special attention in using balanced inputs on all measurement equipment (such as oscilloscope probes) when you are bench testing.
Channel 1 input
Channel 2 input
Amp
Channel 1 output
Channel 2 output first polarity inversion second polarity inversion
FIGURE 9: Internal signal path polarity with example input signals.
Both channels 1 and 2 are fed with the same sine signal.
14
13 Protections
Fault protections are systems designed to protect people from severe or fatal electric shocks and avoid severe damages on the amplifier or the loudspeakers in case of electrical parameters out of scaling or critical changes in environmental conditions.
The architecture of Powersoft’s amplifiers encompass several protection mechanisms triggered by harmful signal and temperature. Protection systems and triggers are independently implemented in the power supply section (power supply protection) and the amplifier section (amplifier protections) in order to minimize system damages and maximize efficiency.
13.1 Power supply protections
Power supply protections aim to isolate a faulty section in electrical power system from the rest of the device in order to prevent the propagation of the fault and limit device damages.
13.1.1 Primary AC mains overcurrent protection
AC main overcurrent are filtered by a 10 A time-lag fuse (also known as time-delay or low blow-fuse). The purpose of the time lag fuse is to allow the supply in electricity for a short time before the fuse actually blows. If the time-lag fuse blows out the amplifier switch off; replace the fuse with a proper 10 A time-lag fuse in order to restore the full functionality of the amplifier.
13.1.2 Primary AC mains overvoltage protection
AC mains overvoltage threshold is set to 295 V rms
. If the AC mains voltage exceeds 295 V rms
the power supply stop working; the device does not turn completely off but falls in a “sleeping” mode: the power supply turns on again when the AC mains voltage drops under 290 V rms
.
AC mains overvoltage are well tolerated by the power supply: non damages can be caused to the system even in case of severe overvoltage up to 385 V rms
.
13.1.3 Primary thermal protection
The temperature is detected at power supply’s Q6 and Q7
MOSFETs located on the Main Board bottom surface.
The working temperature of the power supply triggers the heat dissipated by the device: if the temperature rises exceeding components tolerances, the primary hardware thermal protection starts lowering the rails voltage in order to lower the heat wasted and keep the overall efficiency high.
The process is auto-adaptive and aims to maintain the system up even in heavy thermal condition. If the rails voltage drops down to ±33 V the Main Board microcontroller shut down the amplifier section (i.e. shut down the Control Board), the power supply still running. This may happen rarely in harsh conditions: the amplifier does not switch off but neither signal processing nor fan cooling are active. In these conditions, while the temperature slowly decreases, the rails voltage rises: when the rails voltage reaches ±33V, the amplifiers section switch on again. If cooling is not effective, the system may start oscillate.
T (°C)
30
35
20
25
10
15
0
5
50
55
40
45
-20
-15
-10
-5
-40
-35
-30
-25
13.2 Amplifier protections
The amplifier section protections are managed by the Control
Board and the Main Board in tandem.
Amplifier protections are triggered by audio signal current and voltage – by comparing input and output – and NTC, negative temperature coefficient, thermistors. NTC thermistors provide thermal feedback to the Control Board, to the Main Board and possibly to the DSP Board.
NTC resistance decreases with increasing temperature: the table below displays the relationship between temperature and voltage drop across NTC thermistors. NTC’s voltage drop for each channel are routed to the respective TEMPMON contacts on the SO5 socket.
Since the temperature is detected on the PCB surface it does not represent the actual module temperature: be aware that some parts of the amplifier may be at higher temperature.
T (°C)
120
125
130
135
100
105
110
115
140
145
150
90
95
80
85
70
75
60
65
V
2.96
2.71
2.47
2.24
3.86
3.66
3.43
3.2
2.02
1.82
1.63
1.46
4.5
4.37
4.22
4.05
4.82
4.76
4.69
4.6
V
0.38
0.35
0.33
0.31
0.55
0.5
0.46
0.42
0.83
0.75
0.67
0.61
1.3
1.16
1.04
0.93
0.29
0.27
0.25
13.2.1 Secondary thermal protection
Microcontrollers on the Main Board and on the Control Board manage fans rotation depending on the mean temperature of the module sensed by the NTC thermistors.
15
The Main Board and the Control Board microcontrollers work in parallel by triggering fan speed rotation and output power modulation at different temperature threshold. The Main Board’s circuitry implements a fan speed control that operates at lower temperature with respect to Control Board fan management;
Main Board actions have priority on Control Board actions.
In heavy thermal conditions the system reduces the available power drawn by the amplifiers section by means of a reduction of the output current: this lower the heat dissipation and improve cooling, but reduces the signal output level. In parallel to the power drop operated by the Control Board microcontroller, the
Main Board microcontroller reduces the rails tension to ±70V.
The table below shows the temperature thresholds that trigger the microcontrollers and the actions operated accordingly.
13.3 Harmful signal protections
Bad signals can cause amplifier and loudspeakers damages. In order to limit damages, harmful signal triggers specific protections.
13.3.1 Output short circuit
If the load impedance is too low or the loudspeaker line has a short circuit (because of voice coil damages, wires short circuit, improper wiring, etc), the amplifier output current rises to harmful values.
When the output current reaches 54 A peak
(38 A rms
) the
Control Board microcontroller shut down the amplifier section, the power supply still working. After 2 seconds the Control Board microcontroller switches on the amplifier section: if the short circuit still persists, the current rises and the amplifier is switched off again. The microcontroller toggles the amplifiers on and off every 2 seconds until the short circuit is removed.
13.3.2 High frequency stationary loud signals
High frequency stationary signals, like steady sinusoid signals – improperly referred as continuous signals – with high amplitude tend to stress the amplifier section of the module as well as the loudspeakers voice coils.
TEMPMON (V)
V
T
> 2.02
0.9 < V
V
T
T
0.69 < V
< 1.06
T
< 0.9
< 0.69
T (°C)
T mean
< 40
1.63 < V
T
< 2.02 40 < T mean
< 50
1.30 < V
T
< 1.63
1.04 < V
T
< 1.30
50 < T
60 < T mean mean
< 60
< 70
70 < T mean
< 75
75 < T mean
< 90
T mean
> 90
Main Board Fan
OFF
ON SLOW
ON FAST
ON FAST
ON FAST
ON FAST
ON FAST
When a high frequency stationary loud signals is feed into the amplifier the Control Board limits its mean current depending on its level and frequency. The process is auto adaptive and frequency driven: at higher frequency the limiter acts faster.
The system limits output current of loud signals in the band
10 kHz – 20 kHz with output amplitude higher than 95 V rms
; above
20 kHz the protection operates when the output amplitude exceeds 48 V rms
.
13.4 Auxiliary power protections
Auxiliary plugs are protected against short circuit: a poliswitch opens the auxiliary circuits when the current drawn exceeds 2.2A.
13.5 Control Board protection LEDs
The Control Board is equipped with a protection LED per channel (see LED chart). The protection LED lights when one of the following protection systems turns on: f Output short circuit; f High frequency stationary loud signals; f Thermal protection; f Rails undervoltage.
D200 D202 D3 D4 D5 D102
FIGURE 10: Control Board LEDs.
Main Board Power Control Board Fan Control Board Power
W
W
W
W max max max max
OFF
OFF
OFF
ON FAST
W
W
W
W max max max max
V
V
V rails rails rails
= ±70 V
= ±70 V
= ±70 V
ON FAST
ON FAST
1/2 W max
1/10 W max
Amplifiers shut down
D100
16
14 LED chart
LED localization and the following table for LED description.
14.1 Control Board LED chart
LED ID Type
D3
D4 status status
D5 status
D102 protection
D202 protection
D100 status
D200 status
Description
Auxiliary +12 V active
Auxiliary +5 V active
Auxiliary –12 V active
Control Board protection engaged on CH 1
Control Board protection engaged on CH 2
Current calibration / current drawn by CH 1
Current calibration / current drawn by CH 2
14.2 Main Board LED chart
LED ID
D6
D8
D37
D39
D20
Type status status protection status protection
Description
rails +Vcc rails –Vcc
Main Board secondary protection engaged
Mute
Main Board primary protection engaged
Idle mode
ON
ON
ON
NORMALLY OFF
NORMALLY OFF
NORMALLY OFF
NORMALLY OFF
Signal mode
ON
ON
ON
NORMALLY OFF
NORMALLY OFF
BLINK
BLINK
Idle mode Signal mode
ON
ON
ON
ON
NORMALLY OFF NORMALLY OFF
ON when MUTE ON ON when MUTE ON
NORMALLY OFF NORMALLY OFF
D6
D20 D39 D37
FIGURE 11: Main Board LEDs.
D8
17
15 Service
There are no user-serviceable parts in your amplifier. Refer servicing to qualified technical personnel. In addition to having an in-house service department, Powersoft supports a network of authorized service centers. If your amplifier needs repair contact your Powersoft dealer (or distributor). You can also contact the
Powersoft Technical Service department to obtain the location of the nearest authorized service center.
16 Warranty
POWERSOFT guarantees its manufactured products to be free from defective components and factory workmanship for a period of 12 (twelve) months, starting from the date printed in the invoice of purchase.
All warranty repairs and retrofits must be performed at
POWERSOFT facilities or at an Authorized Service Center at no cost for the purchaser. Warranty exclusion: POWERSOFT’s warranty does not cover product malfunctioning or failure caused by: misuse, abuse, repair work or alterations performed by nonauthorized personnel, incorrect connections, exposure to harsh weather conditions, mechanical damages (including shipping accidents), and normal wear and tear.
POWERSOFT will perform warranty services provided that the product is not damaged during transportation.ù
16.1 Return of Goods
Goods can be returned to POWERSOFT only after they have been granted a Return Merchandise Authorization – RMA – number to be attached to the external packaging. POWERSOFT
(or its Authorized Service Center) has the right to refuse any returned good without a RMA number.
16.2 Repair or replacement
POWERSOFT reserves the right to repair or replace any defective goods covered by product warranty at its sole discretion and as it deems best.
16.3 Cost and responsibility of transport
The purchaser (or end user/customer) is solely responsible for all transportation costs and risks associated with sending warranty covered goods to POWERSOFT or its Authorized Service Center.
POWERSOFT will assume full responsibility and cover all costs incurred to send the goods back to the purchaser (or end user/ customer).
17 Assistance
Even though most product malfunctioning can be solved at your premises through Powersoft Customer Care or your direct knowledge, occasionally, due the nature of the failure, it might be necessary to return defective products to Powersoft for repair. In the latter case, before shipping, you are kindly asked to follow step by step the procedure described below:
18
f Obtain the “Defect Report Form” by contacting our
Customer Care Department via email: [email protected] or download the“Defect Report Form”.
f Fill out one “Defect Report form” for each returned item
(the form is an editable tab guided document) and save as your name, amp model and serial number (for example: distributorname-DM2004PFC2-17345.doc) providing all required information except the RMA code/s and send it to [email protected]
for Powersoft approval.
f In case of defect reports approved by the Powersoft
Customer Service Representative you will receive an RMA authorization code (one RMA code for each returning device). Upon receiving the RMA code you must package the unit and attach the RMA code outside the pack, protected in a waterproof transparent envelope so it is clearly visible.
All returning items must be shipped to the following address:
Powersoft S.p.A.
Via Enrico Conti, 13-15
50018 Scandicci (FI) Italy
In case of shipment from countries NOT belonging to the
European Community make sure you have also followed the instructions described in the document available for download at the
TEMPORARY EXPORTATION / IMPORTATION PROCEDURE link at http://www.powersoft-audio.com/en/support/service.html
Thank you for your understanding and cooperation and continued support as we work to improve our partnership.
18 Specifications
General
Number of channels
Output power
EIAJ Test Standard, 1 kHz, 1% THD
AC Mains Power
Nominal power requirements
Operating range
Efficiency
Power factor cos (ϕ)
Power consumption
I/8 of max power @ 8 � bridged
Thermal
Max output voltage
Max output current
Max aux supply current draw
Max environmental operating temperature
Thermal dissipation
I/8 of max output power @ 4 �
I/4 of max output power @ 4 �
Audio
Gain
Voltage gain
Frequency response
S/N ratio (amplifier section)
Crosstalk separation
Input sensitivity @ 8 �
Max input level
Input impedance
THD+N 1)
DIM100 IMD 1)
Slew rate
1)
Damping factor
1)
Output type
DSP & Networking (optional board)
Connector
Configuration
Remote control
Construction
Dimensions
Weight
1) Guaranteed by design
4 � / Ch
1000 W
2 ins - 2 outs
2-channel mode
8 � / Ch
600 W
16 � / Ch
320 W
108 V peak
(77 V rms
)
54 A peak
(38 A rms
)
500 mA mono-bridged mode
8 � / Ch pair
2000 W
16 � / Ch pair
1200 W
AC 100 V - 240 V, 50/60 Hz with PFC
AC 90 V - 264 V
> 75% (typical)
> 0.90 @ 4 � full power
600 W
297 BTU/h
587 BTU/h
40° C
115 V
Fan, variable speed, temperature controlled
230 V
75 kcal/h
148 kcal/h
293 BTU/h
556 BTU/h
74 kcal/h
140 kcal/h
32dB, 38 dB x 40, x 80
10 Hz - 25 kHz ( -3 dB) for 1 W @ 4 �
> 115 dBA (20 Hz - 20 kHz, A weighted)
-71 dB @ 1 kHz (4 �)
1.6 V / +6 dBu
2.7 V / +10.8 dBu @ 32 dB gain
10 k� balanced
< 0.09% 1 W to full power @ 4 � (typically <0.05%)
< 0.05% 1 W to full power @ 4 � (typically <0.02%)
50 V/µs @ 8 �, input filter bypassed
> 10000 @ 100 Hz unbalanced to ground
72-pin SIMM socket (DSP-C and DSP- 4 compatible)
Configurable with Sigma Studio
TM
or predefined layout
Fully supported by Powersoft Armonía TM Pro Audio Control Suite
216 mm x 122 mm x 79 mm (8.5” x 4.8” x 3.1")
1550 g (3.4 lb)
19
© 2012 - 2013 Powersoft
Via Enrico Conti, 5
50018 Scandicci (FI) Italy
Tel: +39 055 735 0230
Fax: +39 055 735 6235
General inquiries: [email protected]
Sales: [email protected]
Application & technical support: [email protected]
Service & maintenance: [email protected]
www.powersoft-audio.com
powersoft_dm2004PFC2_uguide_en_v1.1
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