JVC HD-Z56RF7/A Service Manual page 112

Problem
Adjust the "Bass" and "Treble."
Poor sound
If receiving a poor signal in "Stereo / · ", switch to "Mono."
Adjust the channel reception using "Manual."
"Voice Enhancer" does "AI Volume" makes the effect of "Voice Enhancer" weak.
not work Switch "AI Volume" to "Off."
Wrong screen size
Switch "Size" in "HDMI Setting" to "1" or "2."
No picture, no sound Use the cable with HDMI logo.
Check if the device is compliant with HDMI.
Switch "Audio" in "HDMI Setting" to "Digital" or "Auto" for
No sound
HDMI devices, or "Analogue" or "Auto" for DVI devices.
(Not available for HDMI-2)
Green and distorted
Wait a little for the signal to stabilize when switching the
signal format for an "HDMI" device.
screen
Some functions do not It is not a malfunction. Some functions (dark background) in
work the menu do not work depending on the situation.
Some inputs cannot
"VIDEO-1 (Component signal)", "VIDEO-3 (Component
be selected in the sub- signal)", "HDMI-1", "HDMI-2" inputs and PC mode cannot be
picture selected in the sub-picture.
No picture, no sound
Some inputs are not output from the OUT terminal.
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Problem
Keep the TV off for a while and then turn the power on
again. If the TV goes into warning mode, unplug the TV
The LAMP indicator
after the cooling has completed and consult your retailer. (It
blinks rapidly
may be a malfunction of the internal electrical circuits.)
Keep the TV off for a while and then turn the power on
The power lamp and
again. If the TV goes into warning mode, unplug the TV
LAMP indicator blink
after the cooling has completed and consult your retailer.
alternately
(The internal temperature rises abnormally or the fan may
be blocked.)
If this condition occurs soon after replacing the lamp,
reinstall the new lamp unit. (The lamp unit may not be
inserted into the lamp housing correctly.)
Repeat the lamp installation steps, taking care to observe
all warnings.
The power lamp and
- Make sure the lamp sits fl at inside the housing area.
LAMP indicator blink
- Make sure the lamp cover is reinstalled.
rapidly simultaneously
If this condition occurs except for replacing the lamp, keep
the TV off for a while and then turn the power on again. If
the TV goes into warning mode, unplug the TV after the
cooling has completed and consult your retailer. (It may be
a lamp malfunction.)
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