JVC D-ILA DLA-G20U Mode D'emploi page 67

Troubleshooting (Cont.)
Symptom
Video image is • Is picture quality (color density, etc.)
abnormally dark or
bright.
• Is the correct CLAMP selected?
Color is poor or
• Is picture quality (color density, etc.)
unstable.
• Is the correct broadcast system (color
• Are signals (scanning frequency, etc.) to
• Is the source setting correctly selected?
The upper part of the • While computer system signal is input,
video image bows or
distorts.
• Isn't signal with much jitter or skew
• Is the source setting correctly selected?
Video image and
• Are video picture and audio turned off
audio sound suddenly
go out.
Remote control unit
• Are batteries installed correctly?
does not work.
• Are batteries exhausted?
• Is there a shielding object between the
• Is the distance too long?
When the emergency indicator starts blinking:
Refer to the CAUTIONS and NOTES on page 25.
* This projector is equipped with a microcomputer that may operate abnormally due to interference from external components.
If this happens, turn off the main power and disconnect the power cord from the wall AC outlet. Then reconnect the power cord
to AC outlet and turn on the main power again.
(For the turning on and off the power, see pages 25 to 26.)
Maintenance
• Stains on the cabinet
Should be wiped off with a soft cloth. If the cabinet is heavily stained, wipe it with a cloth soaked in water-diluted neutral
detergent and wrung well, then wipe clean with a dry cloth.
• Since the cabinet may deteriorate in quality, become damaged or get its paint peeled off, be careful about the following:
– Do not wipe it with a hard cloth.
– Do not wipe it strong.
– Do not wipe it with thinner or benzene.
– Do not apply any volatile substance such as insecticides to it.
– Do not allow any rubber or vinyl article to remain in contact with it for a long time.
• Stains on the lens
Sould be cleaned off with commercially available blowers or lens cleaning paper (for cleaning glasses and cameras).
Do not use liquid cleaning agents. This could cause the surface coating to be removed.
Do not rub or hit the lens as its surface is prone to damage.
66
Probable cause
adjusted correctly?
adjusted correctly?
system) selected?
connected devices appropriate?
Isn't a wrong source (forced mode)
selected?
isn't a sync signal for composite sync
(Cs) or G on sync being input?
distortion being input to a video deck?
Isn't a wrong source (forced mode) or
channel selected?
by pressing the AV MUTING button on
the remote control unit?
remote control unit and the remote
sensor?
Corrective action
• Adjust picture quality on the menu.
• Select the correct CLAMP on the
OPTION MENU.
• Adjust picture quality on the menu.
• Set the broadcast system (color
system) to AUTO.
• Check if the signal is appropriate
(scanning frequency, etc.), and input
the appropriate signal.
• Set the source setting to AUTO. If the
problem still persists, set it to the
correct dedicated source (forced
mode).
• Input separate sync signals for vertical
sync (V) and horizontal sync (H)
signals.
• Input signals with little jitter or distor-
tion.
• Set the source setting to AUTO, or to
the correct dedicated source (forced
mode) or channel.
• Turn on video picture and audio by
pressing the remote control's AV
MUTING.
• Match the polarities of batteries
correctly (+ to + and - to -).
• Replace with new batteries.
• Remove any shielding objects.
• Use the remote control unit at a nearer
point.
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