Owner manual

23
UK CONTROLSANDFUNCTIONS
FRONTPANEL
MPU4240/MPU4120/MPU4060/MPU2120
[1-4]AMP1/2/3/4:
[2]OC:
[3]FAULT:
[5]PWR
OVERCURRENT_
:Indicatesthatthesystemison.
WhentheLEDlightsup,thesignalisontherelevantamplifier.
whentheLEDlightsup,thecurrentabsorbedbyaload(and,
hence,thepower)isexceedingthecurrentthatcanbesuppliedandsupportedbytheline,
orashort-cuthasoccurredontheline.
WhentheLEDlightsup,acomponentmaybebrokenorthethermalprotection
hasactivated:thiscanoccurduetoexcessiveheat,overchargeorduetoatoohighaudio
signalatanexcessivelyhighfrequency.Inthiscase,toavoiddamagestothepowercircuits,
theprotectionactivates,temporarilyinterruptingamplificationuntiloptimalconditionsare
restored.
MPU4240
FOURCHANNELSPOWERUNIT
AMPLIFIER3/4
AMPLIFIER1/2
PWR
AMP2AMP1 OC FAULT AMP4AMP3 OC FAULT
1
2
3
4
1
2
3
4
5