DVI DL 101 • Installation and Opeation
Installation and Operation, cont’d
2-14
DVI DL 101 • Installation and Opeation

2-15
Power Supply
Output Cord
Orange Captive Screw
Connector
SECTION A–A
Ridges
Smooth
A A
Tie Wrap
3/16” (5 mm) Max.
Wiring the power connector
C When you are connecting the power supply, voltage
polarity is extremely important. Applying power
with incorrect voltage polarity could damage
the power supply and the equalizer. Identify the
negative lead by the ridges on the side of the cord
(see the illustration above).
C Do not tin the stripped power supply leads before
installing the captive screw connector. Tinned
wires are not as secure in the captive screw
connectors and could be pulled out.
W The two power cord wires must be kept separate
while the power supply is plugged in. Remove
power before continuing.
To verify the polarity before connection, plug in the power
supply with no load and check the output with a voltmeter.

Enabling the DDC Buffer

The DDC clock and data lines by default are routed straight
through to the output, bypassing the DDC buffer.
However, if you experience any of the following image
problems, changing this setting to engage the DDC buffer
should correct them.
• The image cuts in and out, or cuts out completely, after a
period of time.
• The image is clear at rst, then displays snow (HDCP error).
• No image appears.
• Incorrect color space selection (purple or blue tint)
• Corrupted EDID data (The computer or source cannot read
the EDID of the connected display correctly due to a long
cable run.)
To enable the buffer,
1. Using an Extron Tweeker or other small Philips
screwdriver, remove the seven screws (three on each side
and one on top) that hold the top cover onto the unit.
2. Remove the two jack screws on either side of the DVI input
connector on the front panel (see the illustration on the
next page).
3. Slide the top cover forward until it clears the input
connector, then lift it off the unit.
4. Facing the DVI DL rear panel, locate the two DDC jumpers
(J5 and J4) on the two sets of three pins in the lower-right
corner of the internal board. By default, these jumpers are
on the middle and outside pins, which permits the DDC
lines to pass straight through without buffering.
Jumpers on the internal board in default (outside)
position