ULN-8/LIO-8 Jumper Settings
505
Setting the output level jumpers
To increase the output levels, install the jumpers on the sites toward the front of the unit.
Do not install jumpers to the sites closest toward the rear panel.
You must also install jumper J2 on the power supply board.
The jumpers
must
run from front to rear, not side to side. Unless you have a
very
specific reason
all jumpers should either be removed or present, not intermixed. The difference in output level
could lead to confusion.
Power supply
There are three jumpers on the power supply board:
• J9 disables the power supply for the preamps
• J8 disables the phantom power supply
These should
both
be installed if no preamps are installed. They must be removed if any preamps are
installed.
• J7 bypasses the front panel power switch. Installing a jumper at this site will provide constant power
from the 4 pin XLR power jack.
• J2 enables high power mode. It must be installed if any of the output jumpers are installed.
Figure E.7: PSU Jumper Sites