Failure of the varistor RV1
DigiMod 500/1000/1500/2000HV
The short circuit of the varistor RV1 and therefore its outbreak, can occure in one of this cases:
- To the DigiMod it has been applied a mains voltage higher than 275VAC.
- To the DigiMod it has been applied a mains voltage of 230VAC with the 115VAC
Operation Selector in short circuit.
- To 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.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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