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Figure 3. 600
Ω
Balanced cable termination
B. POWER TERMINATIONS
1. 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 7 pin
XLR connectors at each end.
2. Please note that the DC power cord should be connected before the
AC power is turned on. This prevents incorrect power sequencing
which can cause damage to the audio circuits.
3. To avoid any interference with the low level audio circuitry, the power
supply should be located at least 3' (1m) from the preamplifier unit.
4. A standard AC power cable is included. For safety, it is recommended
that the cord be connected to a grounded outlet. In the event of noise
from a ground loop, the audio ground can be isolated from the chassis
ground by removing jumper J9 in the power supply. (See paragraph 6)
5. AC input voltage settings can be adjusted for 100V, 120V, 220V and
240V operation at 50-60Hz. 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 table below. Be sure to use a GMC
type time delay or fuse with a 250V rating.
Voltage
100V
120V
220V
240V
Fuse rating
0.75A
0.75A
0.5A
0.5A
Figure 4. Fuse value table
1
3
2
1
3
2
301
Ω
PREAMP END
RECORDER END
