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RQT7450
Reference
Troubleshooting guide
Before requesting service, make the following checks. If you are in doubt about some of the check points, or if the remedies indicated in the chart
do not solve the problem, consult your dealer for instructions.
The following do not indicate a problem with this unit:
Power Page
Displays
TV screen and video
Sound
≥Regular disc rotating sounds. The sound of the disc rotating may
become louder especially when finalizing a DVD-R.
≥Poor reception due to atmospheric conditions.
≥Image disturbance during search.
No power.
Unit does not turn on pressing
[Í DVD].
≥Insert the AC mains lead securely into a known active AC mains socket. 7
The unit switches to standby mode.
≥One of the unit’s safety devices is activated. Press [Í/I] on the main unit to turn the unit on. —
The display is dim. ≥Change “FL Display” in the SETUP menu. 41
“0:00” is flashing on the unit’s
display.
≥Set the clock. 43
The time recorded on the disc
and the available time shown
do not add up.
The play time shown for MP3 does
not agree with the actual time.
≥Times shown may disagree with actual times.
≥More disc space than the actual recording time is used after recording or editing the DVD-R
200 times or more.
≥While searching, the elapsed time may not display correctly.
≥Even if you erase recorded content from the DVD-R, there is no increase in disc space.
—
—
—
—
Compared to the actual
recorded time, the remaining
time displayed is less.
(Only when recording in NTSC)
≥The displayed recording/play time is converted from the number of frames at 29.97 frames
(equal to 0.999 seconds) to one second. There will be a slight difference between the time
displayed and the actual elapsed time (e.g., actual one-hour elapsed time may display as
approximately 59 minutes 56 seconds). This does not affect the recording.
—
Television reception worsens
after connecting the unit.
≥This can occur because the signals are being divided between the unit and other
equipment. It can be solved by using a signal booster, available from audio-visual suppliers.
—
Status messages do not
appear.
≥Select “Automatic” in “On-Screen Messages” in the SETUP menu. 41
The grey background does not
appear.
≥Select “On” in “Grey Background” in the SETUP menu. 41
The 4:3 aspect ratio picture
expands left and right.
Screen size is wrong.
≥Use the television to change the aspect. If your television does not have that function, set
“Progressive” in the Picture menu to “OFF”.
≥Check the settings for “TV Aspect” in the SETUP menu.
27
10
There is a lot of after-image
when playing video.
≥Set “Playback NR” in the Picture menu to “OFF”. 27
When playing DVD-Video
using progressive output, one
part of the picture
momentarily appears to be
doubled up.
≥Set “Progressive” in the Picture menu to “OFF”. This problem is caused by the editing
method or material used on DVD-Video, but should be corrected if you use interlace output.
27
There is no apparent change
in picture quality when
adjusted with the Picture
menu in the on-screen menus.
≥The effect is less perceivable with some types of video. —
The images from this unit do
not appear on the television.
Picture is distorted.
≥Make sure that the television is connected to the VIDEO OUT terminal, S-VIDEO OUT
terminal or COMPONENT VIDEO OUT terminals on this unit.
≥Make sure that the television’s input setting (e.g., AV 1) is correct.
≥The television isn’t compatible with progressive signals. Press and hold [∫] and [TIME SLIP]
on the main unit at the same time for about 5 seconds. The setting will change to interlace.
≥The unit’s “TV System” setting differs from the TV system used by the disc now playing.
While stopped, keep pressing [∫] and [< OPEN/CLOSE] on the main unit for 5 or more
seconds. The system switches from PAL to NTSC or vice versa.
7
—
—
43
No sound.
Low volume.
Distorted sound.
Cannot hear the desired audio
type.
≥Check the connections and settings. Check the input mode on the amplifier if you have
connected one.
≥Press [AUDIO] to select the audio.
≥Turn off V.S.S. in the following cases.
–When using discs that do not have surround sound effects such as Karaoke discs.
–When playing bilingual broadcast programmes.
≥The disc may have a restriction on the method of audio output. If “D.MIX” does not appear in
the display when playing multi-channel DVD-Audio, only audio for the two front channels will
be output. Refer to the disc’s jacket. [DVD-A]
7, 8, 41
22
27
—
Cannot switch audio. ≥You cannot switch the audio in the following cases.
–When a DVD-R disc is in the disc tray while DVD drive is selected.
–When the recording mode is XP and “Audio Mode for XP Recording” is set to “LPCM”.
≥You have used a digital connection. Set “Dolby Digital” to “PCM” or connect using audio
cables (analog connection).
≥There are discs for which audio cannot be changed because of how the disc was created.
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41
41, 8
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