7
m802 Power Supply Diagram
1.
LED Voltage indicators
2.
Power switch
3.
AC line input
4.
DC output
CAUTION:
ALWAYS CONNECT DC POWER
CORD BEFORE TURNING ON MAIN POWER
front
rear
1
2
3
4
Installation
preaMplifier poWer connectionS
An 8’ (2.8m) DC power cord is supplied to connect the power supply unit to the preamplifier unit. This cord can
be identified by the 8 pin circular connectors at each end.
Please note that the DC power cord should be connected before the AC power is turned on. This prevents incorrect power se-
quencing which can cause damage to the audio circuits.
Warning: A damaged DC power cord can create a shock hazard as Voltages of
66VDC (148VDC with the DPA Input option) can be present. Do not operate the
m802 with a damaged DC power cord. Replace a damaged DC power cord with
a replacement from Grace Design (WA084) only.
To avoid any interference with the low level audio circuitry, we recommend to locate the power supply at least
3’ (1m) from the preamplifier unit.
poWer SUpply Unit connectionS
A standard AC power cable is included. For safety, the power supply cord must be connected to a grounded
outlet.
AC input voltage settings can be adjusted for 100V, 120V, 220V and 240V operation at 50-60Hz. If your voltage
is 230V, use the 240V setting. From the rear of the power supply unit, open the trap door next to the IEC power
inlet with a small screwdriver. Carefully pull the voltage select cam straight out and then insert with the desired
voltage showing. Do not try to rotate the cam while it is in the power input module. Replace the fuses with the
proper value selected from the fuse value table below (figure 1). Be sure to use a time delay type fuse with a
250V rating.
