Lexicon 20 - REV 1 User Manual page 14

Using the 20/20 AD
XLR
CONNECTOR
SHIELDED
TWISTED PAIR
XLR
CONNECTOR
BNC
CONNECTOR
75 OHM
COAXIAL
Jumper settings
(as set at the factory)
10
These instructions are for use by qualified personnel only.
Before opening the 20/20 AD, REMOVE THE POWER CORD. You may be
exposed to hazardous voltages even if power to the unit is turned off.
Turn off power and REMOVE THE POWER CORD
Take a moment to study the figure below. This diagram shows the terminating
and grounding of input signals for the unit, and explains the function of most of
the jumpers on the 20/20 AD Main pc board. The configuration shown illustrates
the jumper settings when the 20/20 AD is shipped from the factory.
CHASSIS GROUND
ANALOG IN
1
+
2
-
3
W2
600 OHM
W10
W12
W14
AES SYNC IN
1
2
3
W17 110 OHM
WORD CLOCK IN
J13
W16
75 OHM
CAUTION
WARNING
before opening the unit.
W1
W9
W11
W13
AES OUT
W26
W27
W18
S/PDIF OUT
Lexicon
XLR
CONNECTOR
1
2
3
SHIELDED
TWISTED PAIR
RCA
CONNECTOR
75 OHM
COAXIAL
CHASSIS CONNECTED TO
EARTH GROUND
THROUGH POWER CABLE
OR GROUND STRAP