Problem Solving; Troubleshooting - Crestron DM-MD8X8 Operation Manual

DigitalMedia™ Switchers

Problem Solving

72 DigitalMedia™ Switchers: DM-MD8X8/16X16/32X32

Troubleshooting

The following table provides corrective action for possible trouble situations. If
further assistance is required, please contact a Crestron customer service
representative.
DM Switcher Troubleshooting
TROUBLE POSSIBLE CAUSE(S)
Incorrect Audio or Audio is routed
Video displayed. separately from video.
Distorted audio or Source does not match
video. capabilities of
destination.
No video. "D" cable is incorrectly
Bandwidth check terminated.
passes and VIDEO
LED on
DM-RMC-100 is lit.
No video displayed, Possible HDCP error.
but audio is heard.
HDCP Check Violation of HDCP rules
Failure Message (number of display
during devices exceeds the
commissioning. source's number of
allowed displays).
Violation of HDCP rules
(device depth exceeds
allowable depth
specification).
Bandwidth Test Poor cable connection to
Failure Message a DM-RMC-100 (on the
during "D" line).
commissioning.
DM-DR Repeater Poor cable connection to
or DM-RMC-100 the DM-DR or
Room Controller do DM-RMC-100 (on the "D"
not report to DM line).
switcher.
No audio output Source is not providing a
from RCA 2-channel audio signal.
connectors on
DMC-HD
Loss of Improper grounding.
functionality due to
electrostatic
discharge.
Crestron DM-MD8X8/16X16/32X32
CORRECTIVE ACTION
Reroute audio together with
video.
Use Crestron Toolbox to
manage EDID capabilities of
devices in the system.
Terminate cable as described
in "DigitalMedia Cable" on
page 28.
Check control system error
log, or DM switch for HDCP
errors.
Disconnect displays that may
not be used with source during
run time and repeat HDCP
check.
Replace source device with a
device that allows more
displays to be connected.
Reconfigure signal path to
remove midpoint devices that
increase overall device depth.
Verify that cable is not crimped
or damaged.
Verify that cable is not crimped
or damaged.
Replace DMC-HD card with
DMC-HD-DSP to provide
2-channel stereo downmix
from audio source.
Check that all ground
connections have been made
properly.
Operations Guide – DOC. 6755C