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Failure of the IGBTs

DigiMod 500/1000/1500/2000HV

DGMMAIN17

DGMMAIN19

Components to be replaced

IGBTs Q1 and Q2
Resistor R20 and R21
Integrated circuit U1

Components to be checked

Zener diodes D2, D27
Zener diodes D29, D30 (From DGMMAIN Version 19)
Bipolar transistor Q8 (From DGMMAIN Version 19)
Diode D3
Fuse F1
Bridge rectifier D1

Powersoft S.r.l. P.I.04644200489 Via Conti 5, 50018 Scandicci (FI) Tel. 055 7350230 Fax 055 7356235 Web:

www.powersoft-audio.com

Email: [email protected]

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Summary of Contents for DigiMod 1000

Page 1: ...6 24 02 DigiMod 500 DigiMod 1000 DigiMod 1500 DigiMod 2000HV DigiMod 1000NPS Service Manual COD MAN DGM SERVICE_MAN_V 1 3 EN MAR 2007 1 ...

Page 2: ... the NTC R10 __________________________________________________________14 Failure of the IC U1 _____________________________________________________________15 Failure of the varistor RV1 _______________________________________________________16 Failure of the IGBTs ____________________________________________________________17 Failure of the CH1 output Mosfets______________________________________...

Page 3: ...Troubleshooting DigiMod 500 1000 1500 2000HV Powersoft S r l P I 04644200489 Via Conti 5 50018 Scandicci FI Tel 055 7350230 Fax 055 7356235 Web www powersoft audio com Email support audio powersoft it 3 ...

Page 4: ...Troubleshooting DigiMod 1000NPS Powersoft S r l P I 04644200489 Via Conti 5 50018 Scandicci FI Tel 055 7350230 Fax 055 7356235 Web www powersoft audio com Email support audio powersoft it 4 ...

Page 5: ...and remove the 2 spacers of the Control Board 2 Unscrew the 6 screws of both the upper lateral sides of the DigiMod Powersoft S r l P I 04644200489 Via Conti 5 50018 Scandicci FI Tel 055 7350230 Fax 055 7356235 Web www powersoft audio com Email support audio powersoft it 5 ...

Page 6: ...cover and unplug the fan connector inserted in the main PCB 4 Remove all the lateral screws and then remove the spring clips Powersoft S r l P I 04644200489 Via Conti 5 50018 Scandicci FI Tel 055 7350230 Fax 055 7356235 Web www powersoft audio com Email support audio powersoft it 6 ...

Page 7: ... 8 screws that fix the main PCB 7 Remove the main PCB After having repaired the DigiMod it is recommended to replace the silpads with new ones This instructions are similar for the DigiMod 1000NPS Powersoft S r l P I 04644200489 Via Conti 5 50018 Scandicci FI Tel 055 7350230 Fax 055 7356235 Web www powersoft audio com Email support audio powersoft it 7 ...

Page 8: ...es DigiMod 500 1000 1500 2000HV Assembly outline DGMMAIN17 Powersoft S r l P I 04644200489 Via Conti 5 50018 Scandicci FI Tel 055 7350230 Fax 055 7356235 Web www powersoft audio com Email support audio powersoft it 8 ...

Page 9: ...es DigiMod 500 1000 1500 2000HV Assembly outline DGMMAIN19 Powersoft S r l P I 04644200489 Via Conti 5 50018 Scandicci FI Tel 055 7350230 Fax 055 7356235 Web www powersoft audio com Email support audio powersoft it 9 ...

Page 10: ...utlines DigiMod 1000NPS Assembly outline DGMNPSMAIN11 Powersoft S r l P I 04644200489 Via Conti 5 50018 Scandicci FI Tel 055 7350230 Fax 055 7356235 Web www powersoft audio com Email support audio powersoft it 10 ...

Page 11: ... of the Control Board 2 Move the two clasps that block the Control Board 3 Replace the Control Board with a new one 4 Reinsert and screw the two spacers Powersoft S r l P I 04644200489 Via Conti 5 50018 Scandicci FI Tel 055 7350230 Fax 055 7356235 Web www powersoft audio com Email support audio powersoft it 11 ...

Page 12: ...it with the aid of a tester Hold one probe on the pin OUT 1 or OUT 2 of the output phoenix or faston connector and the other ones on Vcc or Vcc Then check which of the two channels has at least one mosfet with the drain source junction in short circuit Powersoft S r l P I 04644200489 Via Conti 5 50018 Scandicci FI Tel 055 7350230 Fax 055 7356235 Web www powersoft audio com Email support audio powe...

Page 13: ... or OUT 2 of the output phoenix connector and the other ones on Vcc or Vcc Then check which of the two channels has at least one mosfet with the drain source junction in short circuit Powersoft S r l P I 04644200489 Via Conti 5 50018 Scandicci FI Tel 055 7350230 Fax 055 7356235 Web www powersoft audio com Email support audio powersoft it 13 ...

Page 14: ...terrupted Component to be replaced Resistor NTC R10 After having replaced the resistor R10 put some silicon between R10 C137 and T1 Powersoft S r l P I 04644200489 Via Conti 5 50018 Scandicci FI Tel 055 7350230 Fax 055 7356235 Web www powersoft audio com Email support audio powersoft it 14 ...

Page 15: ...U1 Zener diodes D2 D27 Zener diodes D29 D30 From DGMMAIN Version 19 Bipolar transistor Q8 From DGMMAIN Version 19 Component to be checked Bridge rectifier D1 Powersoft S r l P I 04644200489 Via Conti 5 50018 Scandicci FI Tel 055 7350230 Fax 055 7356235 Web www powersoft audio com Email support audio powersoft it 15 ...

Page 16: ...o the DigiMod it has been applied the mains voltage on the 115VAC Operation Selector It is not important to remove the PCB to replace the varistor thanks to the cover hole under RV1 Components to be replaced Varistor RV1 Fuse F1 Components to be checked Bridge rectifier D1 Check if the capacitor from C24 to C29 are swells on the top IGBTs Q1 and Q2 Ref Failure of IGBTs Q1 and Q2 Powersoft S r l P ...

Page 17: ...d circuit U1 Components to be checked Zener diodes D2 D27 Zener diodes D29 D30 From DGMMAIN Version 19 Bipolar transistor Q8 From DGMMAIN Version 19 Diode D3 Fuse F1 Bridge rectifier D1 Powersoft S r l P I 04644200489 Via Conti 5 50018 Scandicci FI Tel 055 7350230 Fax 055 7356235 Web www powersoft audio com Email support audio powersoft it 17 ...

Page 18: ...ponents to be checked Diode D22 and D23 Failure of the CH2 output Mosfets Components to be replaced Mosfet Q5 and Q6 Resistor R60 and R61 Integrated circuits U9 and U10 Components to be checked Diode D24 and D25 Powersoft S r l P I 04644200489 Via Conti 5 50018 Scandicci FI Tel 055 7350230 Fax 055 7356235 Web www powersoft audio com Email support audio powersoft it 18 ...

Page 19: ... Components to be checked Capacitor C67 Failure of the resistor R79 Components to be replaced Resistor R79 Components to be checked Capacitor C68 Powersoft S r l P I 04644200489 Via Conti 5 50018 Scandicci FI Tel 055 7350230 Fax 055 7356235 Web www powersoft audio com Email support audio powersoft it 19 ...

Page 20: ...m C51 to C54 are swells on the top Change the capacitors if they are swells and check if the load impedance is inferior respect to the minimum nominal load Powersoft S r l P I 04644200489 Via Conti 5 50018 Scandicci FI Tel 055 7350230 Fax 055 7356235 Web www powersoft audio com Email support audio powersoft it 20 ...

Page 21: ...s Component to be replaced Resistor R22 Failure of the resistor R23 Due to an excessive current draw from 12Volt external circuits Component to be replaced Resistor R23 Powersoft S r l P I 04644200489 Via Conti 5 50018 Scandicci FI Tel 055 7350230 Fax 055 7356235 Web www powersoft audio com Email support audio powersoft it 21 ...

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