Powersoft Digimod Series User manual

Service Manual

Keep this manual

for future reference

powersoft_DigiMod500.1000.1500.2000HV.1000NPS_servman_en_v2.3

Digimod

DigiMod 500

DigiMod 1000

DigiMod 1500

DigiMod 2000HV

DigiMod 1000 NPS

Intentionally left blank

CAUTION

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

identication. At the end of this guide you can nd 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 amplier.

DigiMod 500 1000 1500 2000HV 1000NPS | SERVICE MANUAL

Tools:

Data are subject to change without notice.

For the latest release please refer to the online version available on

www.powersoft-audio.com.

INDEX

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

6. Main PCB Disassembly 9

DigiMod 500 | 1000 | 1500 | 2000HV 9

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

Index:

• Phillips PH 0 screwdriver

• Phillips PH 1 screwdriver

• M3 hexagonal wrench

• M5 socket wrench

• Multimeter

• Soldering station

• Mains insulation transformer

• Function Generator

INDEX

DigiMod 500 1000 1500 2000HV 1000NPS | SERVICE MANUAL

INDEX

1. Testing Components Kit:

Lamp (min.40W/230V, best 60W/230V) for discharging the

ampliﬁer’s capacitors bank

PSU AUX Voltage Cable

DigiMod Mains DC CableDigiMod AMP AUX Voltage Cable

DigiMod Mains Cable

DigiMod 500 1000 1500 2000HV 1000NPS | SERVICE MANUAL

INDEX

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)

(Fig. 3)

Carefully lift the cover, locate and unplug the fan’s power

cable. (Fig. 4)

(Fig. 4)

DigiMod 500 1000 1500 2000HV 1000NPS | SERVICE MANUAL

INDEX

4. Assembly Outline:

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.

AMP SECTION

PS SECTION

(Fig. 5)

Remove Jumper to

insert external circuit

Remove Jumper to

insert external circuit

Remove Jumper to

enable DSP

Remove Jumper to

enable DSP

DigiMod 500 1000 1500 2000HV 1000NPS | SERVICE MANUAL

INDEX

5. Troubleshooting:

Checking the Output Mosfets:

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 500 | 1000 | 1500 | 2000HV

DigiMod 1000NPS

Ω Ω

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

(Fig. 7)

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

In case of any faults in the aforementioned components,

please refer to the table below when ordering the Repair Kit.

DigiMod 500 1000 1500 2000HV 1000NPS | SERVICE MANUAL

INDEX

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).

Checking the RV1 Varistor:

(Fig. 8)

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)

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).

(Fig. 10)

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

In case of any faults in the aforementioned components,

please refer to the table below when ordering the Repair Kit.

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 rst 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.

Take care in mounting the fan with the label facing downwards, and use the original screws, longer ones could damage the capacitor’s bank.

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

DigiMod 500 1000 1500 2000HV 1000NPS | SERVICE MANUAL

INDEX

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.

It is now possible to carefully lift the main PCB out of its casing.

DigiMod 500 1000 1500 2000HV 1000NPS | SERVICE MANUAL

INDEX

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.

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.

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