powersoft M50Q - Discharging Internal Capacitors; Check LED Status for Discharge; Discharge Using a Lamp

INDEX
6
M SERIES | SERVICE MANUAL
3. Discharging the internal capacitors bank:
Before proceeding in operating inside the amplier, check
if the rails are completely discharged: LEDs in (Fig. 3) the
should be off; this should happen about 15 minutes after
the amplier has been switched off and disconnected
from the mains.
Varistor Fuses
F4 Channels 1&2 +
F5 Channels 1&2 –
F3 Channels 3&4 +
F6 Channels 3&4 –
(Fig. 3)
(Fig. 4)
If the LEDs are still on, discharge the output devices and
the power supply capacitors banks. To do so, connect
one end of a lamp of at least 40 W/230V to the fuses
portrayed in (Fig. 3) and the other end to the contact
points close to the varistor highlighted in (Fig. 4).
Once the amplier is open and its power supply is fully
discharged, it is possible to start removing the board.
Capacitor’s bank discharging procedure.