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Troubleshooting
Troubleshooting
To keep the warranty valid, never try to repair the system
yourself. If you encounter problems when using this unit,
check the following points before requesting service.
■ No power
■ No disc detected
■ No picture
■ Black and white or distorted picture
■ The aspect ratio of the TV screen cannot be
changed even though you have set the TV
display format
■ No sound or poor sound
■ Remote control does not work
If normal operation cannot be obtained, unplug the
power cord from the outlet and plug it again. This
resets the internal micro-computer which can be
disturbed during electrical storms, power
interruptions, etc.
If unplugging the AC power cord does not solve the
problem, try the following procedure to reset the
internal micro-computer.
Note that resetting the unit will delete your radio presets
and custom settings.
■ Resetting the System setup
1. Turn the unit on.
2. Press for 3 seconds while holding down the
/ .
3. Release and / when “DR-645**” appears
on the display.
4. Press .
■ Resetting the DVD setup
To reset the custom settings on OSD to its default value,
try the following procedure.
1. Turn the unit on.
2. Press SETUP. Setup menu appears on the display.
3. Select “PREFERENCE”, and then select
“DEFAULT”.
4. Select “RESET”.
DR-645
Ensure that the AC power cord of the apparatus is connected
properly.
Ensure that there is power at the AC wall outlet.
Press ON/STANDBY to turn the unit on.
Insert a disc.
Check if the disc is inserted upside down.
Wait until the moisture condensation at the lens has cleared.
Replace or clean the disc.
Use a finalized CD or correct format disc.
Check the video connection.
Turn on the TV to the correct Video-In channel.
Progressive scan is activated but the TV does not support
progressive scan.
The disc does not match the TV color system standard
(PAL/NTSC).
Sometimes a slight picture distortion may appear. This is not
a malfunction.
Clean the disc.
A distorted picture may appear during progressive scan setup.
The aspect ratio if fixed on the loaded DVD disc.
The aspect ratio may not be changed for some TV systems.
Adjust the volume.
Disconnect the headphones.
Check that the speakers are connected correctly.
Check if the stripped speaker wires are clamped.
Before you press any function button, first select the correct
source.
Reduce the distance between the remote control and the unit.
Insert the battery with its polarities (+/-) aligned as indicated.
Replace the battery.
Aim the remote control directly at the sensor on the front of
the unit.