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K2 – K3 Service Manual
1. OPENING THE AMPLIFIER COVER
Disconnect the amplifier from the mains. If the amplifier
has been connected to the mains in the last few minutes,
please proceed with attention as the internal capacitors
bank could be charged and harmful!
Remove the side support steel bars, unscrewing the four
bigger screws with a Phillips PH1 screwdriver. Then
remove the screw in the center using a smaller Phillips
PH 0.
Remove the amplifier cover unscrewing the eight screws
(four in the front, two in the centre and three in the
rear) using a screwdriver Phillips PH 0:
2. DISCHARGING THE AMP CAPACITORS
Before proceeding in operating inside the amplifier it is
necessary to check if the rails are completely discharged:
LEDs in picture below should be off, this should happen
about 15 minutes after the amplifier has been switched
off and disconnected from the mains.
If the LEDs are still on discharge the capacitors bank by
connecting a lamp of at least 40 W/230V
to the connectors seen in the two pictures below
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