powersoft M-Drive User manual

Brand: powersoft

Model: M-Drive

Type: User manual

M-Drive

Service Manual

Keep this manual

for future reference

powersoft_MDrive_servman_en_v0.6

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 M-Drive module.

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.

This documentation contains proprietary information which is the

sole property of Powersoft S.p.A.

These documents are condential and reserved and may not be

disclosed, reproduced and shared with third persons or used

without the express written permission from Powersoft S.p.A.

Should the service centre agreement between the two companies

be interrupted these documents must be returned to Powersoft

S.p.A. Italy or proof of their destruction be provided.

M-Drive | SERVICE MANUAL

Data are subject to change without notice.

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

www.powersoft-audio.com.

INDEX

Tools:

1. Testing Equipment 4

2. Removing the Module’s Cover 5

3. Main Board Layout 5

4. Discharging the Module’s Capacitors Bank 6

5. Troubleshooting 6

Checking the Output IGBTs 6

Checking the Power Supply 8

Checking the AUX Voltages 8

Checking the PSU Mosfets 9

6. LED Charts 9

7. Switching the Module On in DC 10

8. Checking the Module in DC 10

Function Generator 10

Setup 11

Checking the AUX Tensions 12

Checking the TEMPMON 1/2 Thermal Limits 12

Checking the Rail’s Voltages in DC (No Load) 12

Switching the Module ON in AC 13

Checking the Rail’s Voltages in AC (With Load) 13

Audio Tests 14

DPC Board LED Status Charts 15

9. Main Board Disassembly: 16

10. SilPad Replacement: 16

11. Known Issues 17

Excessive Gain on the Output stage 17

12. Firmware Update Procedure 18

13. Initialization Procedure (restore to Factory Presets) 20

14. Repair Kit List 21

Index:

• Phillips PH 0 screwdriver.

• Phillips PH 1 screwdriver.

• M5 socket wrench.

• Small cutter

• Tweezers

Required Instrumentation Q.ty Example/Comments

Dual stabilized power supply 30 Vdc 5 A 2 APLHA Electronica mod. AL852D or equivalent

Digital Oscilloscope 50 Mhz 1 TEKTRONIK TBS – 1052B-EDU or equivalent

Signal generator 1 Rigol DG1022, Feeltech FY3200S

Variac 1 Toroidal 3 KW (Mono phase)

Dummy load 1500 W 8 Ohm 1 TE CONNECTIVITY / CGS TE1500B10RJ Resistor

Soldering Station 1 WELLER PU81 + WSP80 or equivalent

SMD rework soldering station 1 GORDAK 952 or equivalent

Digital Multimeter 1 FLUKE 179 or equivalent

Pc with at least 1 eth board 1

Any evidence of tampering by unathorized personnel results

in immediate termination of the warranty.

M-Drive | SERVICE MANUAL

INDEX

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

NOT INCLUDED

IpalMod Pressure Sensor

CB000589.R DigiMod Mains DC Cable

CB000684.R DigiMod PFC2-PFC4 MDRIVE PSU AUX Voltage Cable

1. Testing Equipment

KT000291 Interface Board

KT000193 IpalMod Interface Board

CB000591.R PFC2-PFC4 PSU AUX Voltage Cable

+18Vdc

LM7812

M-Drive | SERVICE MANUAL

INDEX

2. Removing the Module’s Cover

3. Main Board Layout:

By means of an M5 Socketed Screwdriver, remove the

two metal spacers highlighted on (Fig. 1) and remove the

DSP Board by unclipping it from the retaining brackets.

(Fig. 1)

(Fig. 2)

Using a PH1 Phillips Head Screwdriver, unscrew all 8

screws highlighted on (Fig. 2).

Note that one of the screws could be hidden underneath

the label.

Gently lift the cover from the DSP board side, disconnect

the 2 fans power cables.

It is now possible to safely remove the board.

CH1

CH2

PFC

EMI

FILTER

SECONDARY BULK

DSP SLOTS

M-Drive | SERVICE MANUAL

INDEX

4. Discharging the Module’s Capacitors Bank:

5. Troubleshooting:

Checking the Output IGBTs

(Fig. 3)

Highlighted on (Fig. 3) are pins 1/2 and 19/20.

Connect one end of a 60w Light Bulb as indicated on

(Fig. 3)

With a Multimeter set to Ohm, check for any short circuit

in the Output IGBTs by probing the points highlighted on

(Fig. 4)

Insert the DSP Board in the SO1000 socket.

Connect the Interface to the DSP Board.

Proceed by connecting the PFC2-PFC4 AMP AUX

Voltage Cable to the PL2 connector on the module and

replicate the connections on the portrayed External

Power Supply.

Slowly increase the output voltage on the power supply

to +12Vdc and -12Vdc (Fig. 5).

Check the absorption, fans and interface must be

disconnected:

Red +18Vdc: 40mA

Black -18 Vdc: 40mA

Green +12Vdc: 470mA ± 15%

Blue -12Vdc: 50mA ± 15%

The following page contains further testing procedures to

be completed with the use of an oscilloscope.

Zoom on the waveforms to check the shape of the

resulting waves.

Out Of Range Values, Blown IGBTs are signs of

malfunction in the AMP section, please order the

KT000852.R KIT M-DRIVE AMP 1CH.

(Fig. 4)

(Fig. 5)

+18 V 40 mA

+12 V 470 mA

–18 V 40 mA

–12 V 55 mA

DSP Board interface connectors

M-Drive | SERVICE MANUAL

INDEX

5.00 V - 10us

5.00 V - 10us 5.00 V - 10us

Channel 1 Channel 2

5.00 V - 10us

40Vpp 48KHz

10Vpp 48KHz

1Vpp 48KHz

40Vpp 48KHz

10Vpp 48KHz

1Vpp 48KHz

M-Drive | SERVICE MANUAL

INDEX

Checking the Power Supply

Checking the AUX Voltages

18 V 44mA

With a Multimeter set to Ohm, check the varistor by

probing on the points highlighted on (Fig. 6)

There should be no continuity between the two points.

∞Ω

(Fig. 6)

(Fig. 7)

Unplug one end of both fuses and check for continuity

on the points highlighted on (Fig. 7) by probing with a

multimeter set to Ohm.

There should be continuity between the two points.

0Ω (Short)

Connect an external DC power supply to the PL1

connector by means of the PFC2 PFC4 AUX Voltage

Cable, as portrayed on (Fig. 8).

Slowly increase the output voltage and check the

absorption:

18Vdc : 44mA

(Fig. 8)

M-Drive | SERVICE MANUAL

INDEX

Checking the PSU Mosfets

13Vpp 44KHz

Color Label Description Led Status

D39 Channel Mute Default OFF

D37 Temperature Protection Default OFF

D6 +VCC Default ON

D8 -VCC Default ON

Color Label Description Led Status

D2 +5Vdc SOLID ON

D8 Signal Clip ON

D4 Protection Active ON

D5 Ready SOLID ON

6. LED Charts:

D39

D37

Interface Board

Color Label Signal Status

RED PROTECT

Signal protection

active SOLID ON

No pressure sensor

connected BLINKING

RED LIMIT Limiter active SOLID ON

GREEN SIGNAL Input signal present SOLID ON

GREEN E.SAVE - SOLID OFF

YELLOW TEMP Thermal protection

active SOLID ON

GREEN READY No faults, system

fully operating SOLID ON

GREEN ON System on SOLID ON

Keep the board alive by supplying 18Vdc through the

PL1 connector by means of the PSU AUX Voltage Cable.

Using an oscilloscope, check the waveform’s shapes by

probing the points indicated .

As portrayed on (Fig. 9).

(Fig. 9)

Out Of Range Values, Blown Fuses/Varistor are sign

of malfunction in the PS Section, please order the

KT000851.R KIT M-DRIVE PSU Repair Kit.

18 V 44mA

M-Drive | SERVICE MANUAL

INDEX

7. Switching the Module On in DC:

8. Checking the Module in DC:

Function Generator

Connect the Interface Board and the Pressure Sensor,

disconnect the Fans.

Portrayed on (Fig. 10) is the connection’s diagram

between two DC Power Supplies and the PL15 Connector

by means of the DigiMod Mains DC Cable.

Slowly increase the voltages on both power supplies to

spec, whilst on stationary regimen the current absorption

should fall to 200 mA.

If the Fans are inserted the absorption should fall to 217 mA.

CAUTION: the inrush current may rise up

to 3.15 Apeak!

A Function generator is needed in order to test the

module’s Output Stage, since the module is DC powered

and operates without a Heatsink, it is very important to

test it with an adequate input signal.

The function generator must be capable of generating a

signal composed by 80 ms of a 50 Hz sine-wave burst

every 560 ms of silence (50 Hz 4/32 sine-wave), as

portrayed on (Fig. 11).

For testing purposes, the amplitude is set to 1 VRMS

30 V 200mA

30 V 200mA 30 V 200mA

30 V 200mA

(Fig. 10)

time (ms)0 100 200 300 400 500 600

0,7

-0,7

-1,4

1,4

640

voltage (V)

time (ms)0

0,7

-0,7

-1,4

1,4

voltage (V)

3010 20

(Fig. 11)

DISCONNECT ALL PREVIOUSLY MADE CONNECTIONS

NO LOADS CONNECTED

M-Drive | SERVICE MANUAL

INDEX

Connect the IpalMod Pressure Sensor to the CN109 connector on

the module’s DSP Board.

Complete the rest of the connection between the DPC Board and

the module’s DSP Board.

Connect the module to the KT000291 Interface.

Setup

PAY EXTRA ATTENTION WHEN USING THE

KT000291 SERVICE BOARD, ANY IMPROPER AC-

CIDENTAL CONNECTION MAY CAUSE DAMAGES

TO THE AMPLIFIER.

M-Drive | SERVICE MANUAL

INDEX

Checking the AUX Tensions

Checking the TEMPMON 1/2 Thermal Limits

Checking the Rail’s Voltages in DC (No Load)

(Fig. 12)

(Fig. 13)

(Fig. 14)

With a multimeter set to V, check the tensions on the

KT000291 Interface board by probing on the points

highlighted on (Fig. 12)

+12Vdc: +12Vdc ±10%

-12Vdc: -12Vdc ±10%

+5Vdc: +5Vdc ±5%

With a multimeter set to V, check the tensions on the

KT000291 Interface board by probing on the points

highlighted on (Fig. 13)

TEMPMON 1/2: 1.75Vdc ±15%

Switch on the module in DC and wait 30 seconds in order

to trigger the Stand-By mode

With a multimeter set to V, check the tensions on the

KT000291 interface board by probing on the points

highlighted on (Fig. 14)

+VCCMON 1/2: +30 Vdc ±5% (+VRail: +60 Vdc)

-VCCMON 1/2: -30 Vdc ±5% (-VRail: -60 Vdc)

M-Drive | SERVICE MANUAL

INDEX

Switching the Module ON in AC

(Fig. 12)

Remove al previously made connections.

Connect a variac to the PL15 Connector, and slowly

increase the voltage to 120 VAC.

Checking the Rail’s Voltages in AC (With Load)

Connect the Function Generator to the module’s DPC

Board. (Fig. 15)

Turn the potentiometer completely clockwise.

Feed the module with a 50Hz 8/32 Burst Sine Wave @ 1 Vrms

(0 dBV, 2.21 dBu) amplitude.

(Fig. 15)

With a multimeter set to V, check the tensions on the

KT000291 interface board by probing on the points

highlighted on (Fig. 117)

+VCCMON 1/2: +75 Vdc ±5% (+150Vcc)

-VCCMON 1/2: -75 Vdc ±5% (-150Vcc)

(Fig. 17)

M-Drive | SERVICE MANUAL

INDEX

(Fig. 15)

Connect a FUnction Generator to input (CN11)

By means of the DigiMod Mains DC Cable, connect a

Variac to the CN4 Connector and slowly increase the

voltage to 120 VAC.

Genate a signal @ 0.1 Vrms - 100 Hz

Connect an oscilloscope to the CH1 output and confront

the resulting wave. Repeat the operation with the

remaining Channel.

Once this tests are carried out succesfully, connect a 1000W 8Ω Load to the Output and leave the unit one for at least 10 minutes (PER

CHANNEL)

5.00 V - 10us 5.00 V - 10us

14.5Vpp 100Hz 14.5Vpp 100Hz

100 Hz Sine

Audio Tests

M-Drive | SERVICE MANUAL

INDEX

DPC Board LED Status Charts

Color Label LED Status

Green PRESET OFF

Green ON SOLID ON

Green READY SOLID ON

Yellow TEMP OFF

Green ESAVE OFF

Green SIGNAL SOLID ON

Red LIMIT SOLID ON

Red PROTECT OFF

LED Conﬁguration at Startup

Color Label LED Status

Green PRESET OFF

Green ON SOLID ON

Green READY SOLID ON

Yellow TEMP OFF

Green ESAVE OFF

Green SIGNAL OFF

Red LIMIT OFF

Red PROTECT OFF

LED Conﬁguration after 3 seconds

Color Label LED Status

Green PRESET OFF

Green ON SOLID ON

Green READY SOLID ON

Yellow TEMP OFF

Green ESAVE OFF

Green SIGNAL OFF

Red LIMIT OFF

Red PROTECT OFF

LED Conﬁguration after 30 seconds

M-Drive | SERVICE MANUAL

INDEX

9. Main Board Disassembly:

By means of a PH1 Phillips Head screwdriver, screw all 19 screws highlighted in purple.

Remove the nut marked orange with a M5 socketed hex screwdriver.

Gently lift the board.

10. SilPad Replacement:

IS000036 38x23mmIS000060 52x30mm

IS000060

IS000036

IS000040

Always replace all silpads once the service procedure has been ultimated.

Cut the IS000040 SilPad with a pair of sharp scissors.

IS000040 18x30mm

M-Drive | SERVICE MANUAL

INDEX

11. Known Issues

Excessive Gain on the Output stage

Symptom: low input signals yelding to +6dB gain on the output stage.

Check R1011, R2011 (marked blue in the picture below), with a multimeter, the resistance should be 100 Ω

M-Drive | SERVICE MANUAL

INDEX

12. Firmware Update Procedure

In order to update the Firmware, download the latest

version of the Firmware Updater on the Powersoft

Website. (RESTRICTED AREA > SERVICE CENTRE AMP

MODULES > MDRIVE TOOLS)

Contact the Powersoft Service in order to obtain the

latest rmware version.

Install the RS485 driver.

Connect the DPC Interface to the module.

Connect the module to the PC by means of the PC000096

adapter and the CB000214 cable.

Set the ID to 9.9.

Run the Firmware Updater (v1.1.40 onward).

Select “Update MDrive Firmware”. (Fig. 38)

WARNING: DO NOT DISCONNECT THE

MODULE WHILST TESTING!!!

M-DRIVE

DPC INT

RS485

KT000193

Interface

M-DRIVE

Pressure

Sensor

SET 9.9

RS485

PC000096

CB000214

M-Drive | SERVICE MANUAL

INDEX

Once the update has been completed, disconnect the module from the mains power supply and wait a few minutes in order to discharge

the internal capacitors bank.

Cycle the module (power it on, wait for the completion of the startup procedure and switch it off)

The Firmware Update Procedure is completed.

Select the .bin ﬁle (available on the restricted area)

Select the module to be updated.

Click on the right arrow.

Wait for the Red Text to disappear (approx 3 minutes) Once the Update is complete, the program will prompt a conﬁr-

mation box, click OK. The Update is now complete.

Click on “YES” to conﬁrm the FW Update Procedure.

Tick the “Use RS485” Box, and select the assigned COM Port

Click on the right arrow, the LED on the RS485 should be blinking

red.

m_drive

M-Drive | SERVICE MANUAL

INDEX

Launching the PowerControl Manager

Click on the module

Select the “default preset 1.5.7.bin” File (or any of its latest releases avail-

able on the restriced area)

The procedure will be over once the “loading preset” pop up disappears.

Click on the EQ Window

Click on “Load”

Click on “Find Ampliﬁers”

Verify that the RED LED on the RS485 is blinking

Set up the working area in the same manner described in the FirmWare Update Procedure.

The factory preset is available in: restricted area - service amp modules - MDrive tools

Switch the MDrive On.

Launch the PowerControl Manager (v 2.3.15 onward)

13. Initialization Procedure (restore to Factory Presets)

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powersoft M-Drive User manual

powersoft M-Drive User manual

powersoft M-Drive User manual

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