JVC DLA-SX21U Instructions Manual page 48

Troubleshooting
Symptom
Video image is Is the focus adjusted correctly?
fuzzy.
Is the projector placed too near or too far from
the screen?
Are "Tracking" and "Phase" adjusted correctly?
Video image is ab- Is the "Brightness" adjusted correctly?
normally dark or
bright.
Color is poor or un- Is the picture quality (color, density, etc.) ad-
stable. justed correctly?
Is the correct "Decoder" selected?
Are signals (scanning frequency, etc.) from the
connected device appropriate?
Is the PC2 input terminal being used?
The upper part of If the input signal comes from a computer sys-
the video image tem, is this a sync signal of composite sync (Cs)
bows or distorts. or 'G on sync' type?
Are signals with much jitter or skew distortion
being input from a video deck?
Remote control unit Are batteries installed correctly?
does not work.
Are batteries exhausted?
Is there an obstructive object between the re-
mote control unit and the remote sensor?
Is the remote control held too far from the
sensor?
• This projector uses a micro computer. External noise may cause it to malfunction. If this happens, unplug from the main power outlet and then
plug on again. (☞ page 25, 27)
48
Probable cause Corrective action
• Adjust focus with the focus ring of the lens.
• Set the projector at the correct distance.
• Adjust "Tracking" and "Phase" using the menu.
• Adjust "Brightness" using the menu.
• Adjust picture quality using the menu.
• Set the "Decoder" to "AUTO" or the correct
dedicated decoder.
• If the problem is not rectified after setting to
"AUTO", set to forced dedicated mode.
• Check if the signal is appropriate (scanning
frequency, etc.), and input the appropriate si-
gnal.
• When the PC2 input terminal is being used,
"PC2(BNC)" must be selected from the
"Options" menu. Set it correctly according to
the input signal.
• Input separate sync signals for vertical sync
(V) and horizontal sync (H) signals.
• Input signals with little jitter or skew distortion.
• Use a TBC or a device with a built-in TBC.
• Match the polarities of batteries correctly, as
shown on the battery cartridge.
• Replace with new batteries.
• Remove any shielding objects.
• Use the remote control unit at a nearer point.
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