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DigiMod 500
DigiMod 1000
DigiMod 1500
DigiMod 2000HV
DigiMod 1000 NPS
Service Manual
©2016 Powersoft
powersoft_DigiMod500.1000.1500.2000HV.1000NPS_servman_en_v2.3
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DigiMod 500 1000 1500 2000HV 1000NPS | SERVICE MANUAL
Index:
CAUTION
1.
Testing Components Kit
4
2.
Opening the Module’s Cover
5
3.
Discharging the Module’s Capacitors Bank
6
4.
Assembly Outline
6
5.
Troubleshooting
7
Checking the Output Mosfets
7
Checking the R10 NTC
8
Checking the RV1 Varistor
8
Checking the F1 Fuse
8
Checking the Fan and Fan’s Driver
8
Main PCB Disassembly
9
DigiMod 500 | 1000 | 1500 | 2000HV
9
6.
DigiMod 1000NPS
10
7.
DC Voltage Testing
11
8.
Output Current Offset Calibration Procedure
19
9.
SilPad Replacement Procedure
20
10.
FW Installation Procedure
21
11.
Repair Kit List
22
12.
Fake/Unauthorized Copies
23
RISK OF ELECTRICK SHOCK
DO NOT OPEN
WE RECOMMEND THAT ALL SERVICE OPERATIONS
ARE CARRIED OUT BY A TECHNICIAN IN THE MANNER
DESCRIBED IN THIS GUIDE.
IF NOT EXPLICITLY STATED OTHERWISE, DISCONNECT THE
AMPLIFIER FROM THE MAINS BEFORE OPERATING THE
AMPLIFIER.
WARNING! INTERNAL CAPACITORS BANK COULD BE CHARGED
AND HARMFUL: TAKE CARE OF COMPLETELY DISCHARGE
INTERNAL CAPACITORS BANK BEFORE HANDLING THE DEVICE
This technical document aims to be a support guide in repairing
and low-voltage testing the DigiMod 500, 1000, 1500, 2000HV,
1000NPS Modules.
The troubleshooting approach will help you characterize the kind
of fault you incur. A recovery method and the related assembly
outline detail is thoroughly explained for the most common faults.
The components to be replaced are clearly shown to help their
identification. At the end of this guide you can find a detailed
list with the description and the respective Powersoft internal
reference code of the spare parts.
Always use an anti-static wrist band while servicing the amplifier.
Tools:
•
•
•
•
•
•
•
•
Phillips PH 0 screwdriver
Phillips PH 1 screwdriver
M3 hexagonal wrench
M5 socket wrench
Multimeter
Soldering station
Mains insulation transformer
Function Generator
INDEX
Data are subject to change without notice.
For the latest release please refer to the online version available on
www.powersoft-audio.com.
DigiMod 500 1000 1500 2000HV 1000NPS | SERVICE MANUAL
1. Testing Components Kit:
DigiMod Mains DC Cable
PSU AUX Voltage Cable
Lamp (min.40W/230V, best 60W/230V) for discharging the
amplifier’s capacitors bank
INDEX
DigiMod AMP AUX Voltage Cable
DigiMod Mains Cable
4
DigiMod 500 1000 1500 2000HV 1000NPS | SERVICE MANUAL
2. Opening the Module’s cover:
Remove the Control Board by unscrewing the two steel
spacers with a M5 socketed wrench and un-clipping the
retainers highlighted in (Fig. 1)
(Fig. 1)
Locate and unscrew all 6 Phillips Head Screws holding
the module’s cover, 3 per side. (Fig. 2,3)
(Fig. 2)
INDEX
(Fig. 3)
Carefully lift the cover, locate and unplug the fan’s power
cable. (Fig. 4)
(Fig. 4)
5
DigiMod 500 1000 1500 2000HV 1000NPS | SERVICE MANUAL
3. Discharging the Capacitor’s Bank:
Connect one side of a 60W light bulb to the pins marked
(+) and the other side to a ground point, repeat on the
other side of the CN13 connector.
(Fig. 5)
ION
ECT
PS
AM
PS
S
ECT
INDEX
ION
4. Assembly Outline:
Remove Jumper to Remove Jumper to
insert external circuit enable DSP
6
Remove Jumper to
enable DSP
Remove Jumper to
insert external circuit
DigiMod 500 1000 1500 2000HV 1000NPS | SERVICE MANUAL
5. Troubleshooting:
Checking the Output Mosfets:
Ω
Ω
DigiMod 500 | 1000 | 1500 | 2000HV
Check for any short in the Output Mosfets by probing with
a multimeter set to Ohm between the points highlighted
in (Fig. 6).
(Fig. 6)
DigiMod 1000NPS
Check for any short in the Output Mosfets by probing with
a multimeter set to Ohm between the points highlighted
in (Fig. 7).
Ω
Ω
INDEX
In case of any faults in the aforementioned components,
please refer to the table below when ordering the Repair Kit.
Model
Kit Number Description
DigiMod 500
KT000819.R KIT DM500 AMP 1CH
DigiMod 1000
KT000821.R KIT DM1000 AMP 1CH
DigiMod 1000NPS
KT000822.R KIT DM1000NPS AMP 1CH
DigiMod 1500
KT000824.R KIT DM1500 AMP 1CH
DigiMod 2000
KT000827.R KIT DM2000 AMP 1CH
(Fig. 7)
7
DigiMod 500 1000 1500 2000HV 1000NPS | SERVICE MANUAL
Checking the R10 NTC:
With the Multimeter set to Ohm, check for continuity in
the R10 NTC, by probing the points highlighted in (Fig. 8).
Ω
(Fig. 8)
Checking the RV1 Varistor:
Ω
Flip the module upside down.
With the Multimeter set to Ohm, check for continuity in
the RV1 Varistor, by probing the points highlighted in (Fig.
9).
(Fig. 9)
INDEX
Checking the F1 Fuse:
With the Multimeter set to Ohm, check for continuity in
the F1 Fuse, by probing the points highlighted in (Fig. 10).
Ω
In case of any faults in the aforementioned components,
please refer to the table below when ordering the Repair Kit.
Model
Kit Number
Description
DigiMod 500
KT000818.R
KIT DM500 PSU
DigiMod 1000
KT000820.R
KIT DM1000 PSU
DigiMod 1500
KT000823.R
KIT DM1500 PSU
DigiMod 2000
KT000827.R
KIT DM2000 PSU
(Fig. 10)
Checking the Fan and Fan’s Driver (DigiMod1500, 2000HV only)
During the module’s booting procedure, the fan spins at full speed for a brief period of time.
A first indication of any fault in the fan or the fan’s driver is the absence of the aforementioned passage.
In case of any fault, remove the fan from the casing and test it by supplying it with +24 Vdc.
If the fan begins to spin, the fault is in the fan’s driver, by contrast, if the fan does not begin to spin, the fault coulbe be in both the fan
and its driver.
Please refer to the table below if there is a fault in the Fan or the Fan’s driver.
Model
Kit Number
Description
DigiMod 1500
KT000825.R
KIT DM1500 FAN
DigiMod 2000
KT000828.R
KIT DM2000 FAN
Take care in mounting the fan with the label facing downwards, and use the original screws, longer ones could damage the capacitor’s bank.
8
DigiMod 500 1000 1500 2000HV 1000NPS | SERVICE MANUAL
6. Main PCB Disassembly:
DigiMod 500 | 1000 | 1500 | 2000HV
Using a M5 Socketed Wrench, and a regular M5 Wrench, remove all 9 screws and nuts highlighted in the pictures below.
Proceed by removing the retainer spring holding the Zobel resistor in place.
The image below portrays all 8 screws needed to be removed in order to separate the PCB from its casing.
INDEX
It is now possible to carefully lift the main PCB out of its casing.
9
DigiMod 500 1000 1500 2000HV 1000NPS | SERVICE MANUAL
DigiMod 1000NPS
Using a M5 Socketed Wrench, and a regular M5 Wrench, remove all 4 screws and nuts highlighted in the pictures below.
Proceed by removing the retainer spring holding the Zobel resistor in place.
INDEX
The image below portrays all 7 screws needed to be removed in order to separate the PCB from its casing.
It is now possible to carefully lift the main PCB out of its casing.
10
DigiMod 500 1000 1500 2000HV 1000NPS | SERVICE MANUAL
7. DC Voltage Testing:
Connect a DC Power Supply to the CN4 connector by means of
the PSU AUX VOLTAGE CABLE. (Fig. 11)
Slowly increase the voltage to +18V, and verify the consumption, it
should be as stated in the following table.
18Vdc
Model
Consumption
DigiMod 500
20 mA ±10%
DigiMod 1000
20 mA ±10%
DigiMod 1500
20 mA ±10%
DigiMod 2000HV
20 mA ±10%
20mA
INDEX
(Fig. 11)
In case of any faults in the aforementioned components, please refer
to the table below when ordering the Repair Kit.
Model
Kit Number
Description
DigiMod 500
KT000818.R
KIT DM500 PSU
DigiMod 1000
KT000820.R
KIT DM1000 PSU
DigiMod 1500
KT000823.R
KIT DM1500 PSU
DigiMod 2000
KT000827.R
KIT DM2000 PSU
11
DigiMod 500 1000 1500 2000HV 1000NPS | SERVICE MANUAL
By means of the PSU AUX VOLTAGE CABLE, supply +18Vdc to the module through the CN4 connector.
With an oscilloscope, check if the waveforms on the IGBTs pins are as portrayed in the picture below.
INDEX
18Vdc
12
20mA
DigiMod 500 1000 1500 2000HV 1000NPS | SERVICE MANUAL
Connect a DC Power supply to the CN4 connector by means of the PSU AUX VOLTAGE CABLE, and supply +18 Vdc.
By means of the DIGIMOD AMP AUX VOLTAGE CABLE, connect a second power supply and set the output voltage to ± 15Vdc, and
check the absorption: it should be as portrayed in the table below.
Model
+15V Consumption
-15V Consumption
DigiMod 500
230 mA ± 10%
70 mA ± 10%
DigiMod 1000
300 mA ± 10%
70 mA ± 10%
DigiMod 1500
300 mA ± 10%
70 mA ± 10%
DigiMod 2000HV
300 mA ± 10%
70 mA ± 10%
+15Vdc
-15Vdc
18Vdc
20mA
INDEX
In case of any faults in the aforementioned components,
please refer to the table below when ordering the Repair Kit.
Model
Kit Number Description
DigiMod 500
KT000819.R KIT DM500 AMP 1CH
DigiMod 1000
KT000821.R KIT DM1000 AMP 1CH
DigiMod 1000NPS
KT000822.R KIT DM1000NPS AMP 1CH
DigiMod 1500
KT000824.R KIT DM1500 AMP 1CH
DigiMod 2000
KT000827.R KIT DM2000 AMP 1CH
13
DigiMod 500 1000 1500 2000HV 1000NPS | SERVICE MANUAL
By means of the DIGIMOD AMP AUX VOLTAGE CABLE, connect a DC power supply and set the output voltage to ± 15Vdc.
Check the shape of the waveforms by first probing on the 2, 4 pins of the U15 IC, then check the shape of the waveforms by probing
on pins 6, 8.
The waveforms should be shaped as portrayed in the figure below.
INDEX
+15Vdc
14
-15Vdc
DigiMod 500 1000 1500 2000HV 1000NPS | SERVICE MANUAL
By means of the DIGIMOD AMP AUX VOLTAGE CABLE, connect a DC power supply and set the output voltage to ± 15Vdc.
Check the shape of the waveforms by probing the highlighted pins on the Q3, Q4, Q5, Q6 Mosfets.
The waveforms should be shaped as portrayed in the figure below.
+15Vdc
-15Vdc
INDEX
15
DigiMod 500 1000 1500 2000HV 1000NPS | SERVICE MANUAL
By means of the DIGIMOD PSU VOLTAGE CABLE, connect a DC power supply to the CN4 connector and set the output voltage to 18Vdc.
By means of the DIGIMOD MAIN DC CABLE, connect a second DC power supply and slowly supply +30Vdc to the module.
Verify the Rail Bus Voltage by probing on the highlighted points in the CN13 connector, it should be as portrayed in the following table.
Model
Rail Bus Voltage
DigiMod 500
+/- 6.5 Vdc ±10%
DigiMod 1000
+/- 6.5 Vdc ±10%
DigiMod 1500
+/- 8.5 Vdc ±10%
DigiMod 2000HV
+/- 14.5 Vdc ±10%
+30Vdc
INDEX
18Vdc
Ω
V
16
Ω
V
DigiMod 500 1000 1500 2000HV 1000NPS | SERVICE MANUAL
By means of the DIGIMOD AMP AUX VOLTAGE CABLE, connect a DC power supply and set the output voltage to ± 15Vdc.
Check the AUX voltages by probing on the highlighted points in the CN14 connector.
Alternatively it is possible to check the Aux Voltages while the board is removed from its chassis by checking the voltage regulators on
the back side of the board, as indicated on (Fig. 12)
+15Vdc
-15Vdc
INDEX
-12Vdc
+12Vdc
+5Vdc
Ground
V
Ground
+5Vdc
+12Vdc
-12Vdc
(Fig. 12)
17
DigiMod 500 1000 1500 2000HV 1000NPS | SERVICE MANUAL
By means of the DIGIMOD AMP AUX VOLTAGE CABLE, connect a
DC power supply and set the output voltage to ± 15Vdc. (Fig. 13)
+15Vdc
-15Vdc
INDEX
(Fig. 13)
Check the Control board by measuring its oscillator’s clock signal,
it should be 12MHz. (Fig. 14)
(Fig. 14)
In this configuration, all 3 green LEDs should be on, whilst both
yellow ones should be OFF. (Fig. 15)
Any other LED configuration is a sign oaf a CNTRL Board fault, in
this case replace the CNTRL Board.
(Fig. 15)
18
Signal
CH2 Protect
-12Vdc
Signal
Indicated on (Fig. 16) are the Control Board LEDs and
their functions.
CH1 Protect
+5Vdc
+12Vdc
DigiMod 500 1000 1500 2000HV 1000NPS | SERVICE MANUAL
(Fig. 16)
Connect the power cable to the CN1 connector located
on the opposite side of the control board.
Check if all 3 green LEDs are on.
CH1 OUT -
CH1 OUT +
Signal Ground 1
Signal Ground 1
CH1 OUT +
Balanced Input +1
Balanced Input +1
CH1 OUT -
Balanced Input -1
Balanced Input -1
Signal Ground 2
Balanced Input +2
Balanced Input -2
Indicated on (Fig. 17) is the pin out of the CN7, CN12,
CN11, CN3 connectors.
(Fig. 17)
8. Output Current Offset Calibration Procedure:
Connect a Signal Generator/Cd Player to the module via
the CN12, CN11 Connectors.
Supply a 1Vrms 1 KHz Sine Wave or play the first track
of the Powersoft Test CD, in which case check with a
multimeter if the output signal of the cd player is 1Vrms.
Signal Ground 2
Balanced Input +2
Balanced Input -2
CH2 OUT +
Portrayed on (Fig. 18) are the CH1, CH2 inputs, the
Output Current Offset Trimmers and the Yellow LEDs.
CH2 OUT -
Located on both top corners of the Control Board are the
Output Current Offset Trimmers, adjust them by turning
the flat head screw until the yellow LEDs below turns off.
(Fig. 18)
19
INDEX
CH2 OUT +
Verify the presence of audio signal by probing on the
CN7, CN3 connectors with an oscilloscope.
CH2 OUT -
Connect a function generator or a cd player to the module
through the CN12, CN11 connectors.
Select an audio track from the Powersoft Test CD, or a
Sine wave test tone.
DigiMod 500 1000 1500 2000HV 1000NPS | SERVICE MANUAL
9. SIlpad Replacement Procedure
Once the repair procedure has been ultimated, replace all silpads.
Remove any residue of dirt, glue or dust that might have been
trapped in the module.
The following images portray where to place the IS000040 Silpad.
IS000031 HI-FLOW 40x55 mm
INDEX
IS000040 ULTRASOFT 18x30 mm
DigiMod 1000NPS
When replacing the IS000031 SilPad, clean all the components
and the heatsink prior to tightening te retainer springs in place.
20
DigiMod 500, 1000, 1500, 2000HV
DigiMod 500 1000 1500 2000HV 1000NPS | SERVICE MANUAL
10. DSP FW installation procedure:
Once the repairing procedure is over, reset the DSP
board by upgrading the FW.
DigiMod comes with two types of DSP boards:
DSP-C (Black PCB, 4 Micro Match)
DSP-D (Blue PCB, 3 Micro Match)
Preset
DSP Version
Firmware Version
Tens
Units
DSP-C
1.2.0
1
0
DSP-D
1.0.0
1
0
After having identified the board, connect the ribbon cable between the respective matching Programming Board and the Module’s DSP
board (Or the interface board if present). (Fig. 19)
(Fig. 19)
Select the appropriate preset from the Preset Bank
Selection control dials, by confronting the aforementioned
table.
Verify the position of jumper 4 should be “OPEN” (Fig. 20)
Turn on the module and wait 10 sec.
INDEX
(Fig. 20)
Verify if the green power led “PWR” and “D16” are on (Fig. 21)
(Fig. 21)
Press switch “S7” on the programming board
Verify if the orange led “DATA” is blinking (Fig. 22)
Wait for the 3 beeps signaling the end of the FW upgrade
procedure.
Turn off the module and remove the ribbon cable
(Fig. 22)
21
DigiMod 500 1000 1500 2000HV 1000NPS | SERVICE MANUAL
11. Repair Kit List:
Model
500
1000
1000NPS
1500
Description
Part Number
Description
KT000818.R
KIT DM500 PSU
IS000031
HI-FLOW 40x55 mm
KT000819.R
KIT DM500 AMP 1CH
IS000040
ULTRASOFT 18x30 mm
KT000820.R
KIT DM1000 PSU
ML000009
WIRE SPRING 1.2mm cod. 28950
KT000821.R
KIT DM1000 AMP 1CH
SM000699.R
Control Board
KT000822.R
KIT DM1000NPS AMP 1CH
SM000700.R
Control Board (DigiMod 2000HV)
KT000823.R
KIT DM1500 PSU
VN000027
Fan 24V 0.1A (DigiMod 1500, 2000HV)
KT000824.R
KIT DM1500 AMP 1CH
KT000825.R
KIT DM1500 FAN
KT000826.R
KIT DM2000 PSU
KT000827.R
KIT DM2000 AMP 1CH
KT000828.R
KIT DM2000 FAN
KT000818.R
KIT DM500 PSU
KT000819.R
KIT DM500 AMP 1CH
KT000820.R
KIT DM1000 PSU
KT000821.R
KIT DM1000 AMP 1CH
KT000822.R
KIT DM1000NPS AMP 1CH
KT000824.R
KIT DM1500 AMP 1CH
KT000823.R
KIT DM1500 PSU
KT000825.R
KIT DM1500 FAN
KT000826.R
KIT DM2000 PSU
KT000827.R
KIT DM2000 AMP 1CH
KT000828.R
KIT DM2000 FAN
INDEX
2000HV
Kit Number
22
DigiMod 500 1000 1500 2000HV 1000NPS | SERVICE MANUAL
12. FAKE/UNAUTHORIZED COPIES:
Please take note that the modules portrayed in the following pictures ARE FAKE UNAUTHORIZED COPIES AND ARE NOT
POWERSOFT PRODUCTS.
These modules are very similar to our DigiMod 500–2000HV Series and you can recognize them from the PCB layout, Control
board and labels.
Those fake modules’s chassis is Golden/Yellow instead of being either Black, Light Blue or Gray.
Powersoft Authorized Service Centres are NOT authorized to repair these modules.
Never use our kits or components in order to repair those unauthorized copies.
Document any kind of encounter with fake modules and don’t hesitate to inform us.
Thank you for your cooperation.
INDEX
23
DigiMod 500 1000 1500 2000HV 1000NPS | SERVICE MANUAL
IMPORTANT SAFETY ADDENDUM
The aim of this addendum is to describe the safety precautions to be undertaken when servicing any Powersoft amplifier/module.
WE RECOMMEND THAT ALL SERVICE OPERATIONS ARE CARRIED OUT BY A TRAINED TECHNICIAN
IF NOT EXPLICITLY STATED OTHERWISE, DISCONNECT THE AMPLIFIER FROM THE MAINS.
ALWAYS DISCHARGE THE INTERNAL CAPACITORS BANK PRIOR TO SERVICING THE AMPLIFIER
Common signs description:
The following is a description of all the warning signs that are commonly implemented throughout our range of products, and those that
are mandatory in every service station or workplace.
Label
Meaning
General Danger
Danger: High Voltage
Danger: Hot Surface
INDEX
Danger: Electrostatic Discharge (ESD)
Electrical Grounding Point
Protective Footwear Must be Worn
Observe precaution for handling Electrostatic
Discharge sensitive devices
Safety precautions:
We recommend to follow all precautions stated by the law while
handling sensitive electrical components.
All of the servicing work must be carried in a EPA ESD compliant
environment, with the exception of the mere handling of the mechanical
parts.
An ESD protected workstation consists in:
• Static-Dissipative working surface connected to the EBP (Farnell 1503198)
• Wrist-chord and wrist band connected to the EBP (Farnell 1546970)
The technician must wear:
• Protective Footwear
• ESD EPA clothing (Farnell 1735510)
• Static dissipative gloves (Farnell 1503210)
The following pictures portray the minimum ESD-Protected setup,
including static dissipative working surface and wristband connected
to an Earth Bonding Point connected to the ground.
24
Intentionally left blank
Powersoft S.p.A.
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]
powersoft-audio.com
Data are subject to change without notice. For latest update please refer to the online version available on www.powersoft-audio.com