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Maintenance and Troubleshooting
Q-1500d Series Installation/Operation Manual 99
PRE
L
IMINAR
Y
RGB-HD or Component HD
images appear “noisy” or drop
out intermittently.
• Tracking and Phase
settings need adjustment.
• The DHD Controller is
having difficulty detecting
sync pulses from the
source.
• Adjust Tracking and Phase
settings (refer to Input
Position on page 74).
• Adjust the Sync Threshold
setting (refer to Sync
Threshold on page 93).
Computer images do not dis-
play correctly.
•The resolution and
frequency of the video card
in the computer are not
compatible with the
Q-1500d.
• Select a compatible
resolution and vertical
frequency (refer to
Supported Timings on
page 128).
Images from an HDMI source
do not display.
•The resolution and
frequency of the video card
in the computer are not
compatible with the
Q-1500d.
• EDID compatibility issue.
• HDMI cable from source to
Brightness Acceleration
Engine is either defective or
too long.
• Select a compatible
resolution and vertical
frequency (refer to
Supported Timings on
page 128).
• Set HDMI EDID Extension
to “Off” (refer to HDMI
EDID Extension on
page 93).
• Try a known-good and/or
shorter HDMI cable.
Video from an HDMI source
lags behind audio.
• Refer to Audio/Video
Synchronization Issues
on page 29.
• Use an external A/V
receiver with audio delay
capability to synchronize
the audio signal with the
video signal.
The image is too large or too
small.
• Image size needs adjusting. • Adjust the image size (refer
to Input Position on
page 74).
AutoScope lens motor doesn’t
work.
• The motor is not plugged in
or the AC outlet is not
active.
• The motor is not connected
to the trigger output on the
projector.
• Ensure that the motor is
plugged in and that the AC
outlet is active.
• Check the trigger
connection between the
lens motor and projector
(Figure 3-8).
Table 5-1. Troubleshooting Chart (continued)
Symptom Possible Cause(s) Solution