Panasonic SCHT56 Troubleshooting guide/Maintenance, If the surfaces are dirty

Troubleshooting guide/Maintenance

Troubleshooting guide

Before requesting service, make the following checks. If you are in doubt about any of the check points, or if the remedies indicated in the chart do not solve the problem, refer to “Customer Services Directory” on page 23.

■ Common problems			Page
No power.	• Ensure the AC power supply cord is connected.		10
	• Turn the volume up.		15
	• Check connections to speakers and other equipment.		6-10
No sound.	• Select the correct source.		15
	•	Check that the digital signals can be decoded by this unit.	9
	• Turn PCMFIX and DTS FIX off.		13
	• An electrostatic discharge (ESD) may interrupt sound. Turn the unit off and on again.		–
Display is dim.	•	Check the DIMMER level.	19
	• An electrostatic discharge (ESD) may cause the display to dim. Turn the unit off and on again.		–
“OVERLOAD”, “F70”, or “F76”	•	Turn the unit off, disconnect the AC power supply cord, and consult your dealer.	–
appears on the display.
“FAN LOCK” appears on the	•	Remove the object obstructing the cooling fan.	–
display.
■ Sound
Sound is not heard from the
center, surround, or subwoofer	• The source may be stereo. Use Dolby Pro Logic II or SFC.		15
speakers.
A ticking noise interrupts the	•	The speaker wires are touching each other. Check all your speaker connections.	6
sound.
Cannot use Dolby Pro Logic II	• You cannot use Dolby Pro Logic II or SFC when input is PCM with sampling frequencies of 96 kHz		15
or SFC.		or 88.2 kHz.
■ Radio
	• Connect the appropriate antenna. (You may need an outdoor antenna or one with more elements.)		10
The radio cannot be tuned in	• Adjust the position of the FM or AM antenna.		10
	•	Reduce the treble.	16, 18
or there is a lot of noise and
	•	Turn off nearby televisions, video decks and DVD players.	–
interference.
	•	Separate the antenna from other cables, leads, and appliances.	–
	• Try changing the sound mode or turning the modes off.		15
There is a lot of noise when	•	Try changing the BEAT PROOF mode.	16, 17
listening to AM.
■ HDMI
When using an HDMI	• Should you be playing a chapter on a DVD:		–
		– Change the audio output setting on the DVD player or DVD recorder from “Bitstream” to “PCM”.
connection, the first few
		(6.1-channel sources will however be played as 5.1-channel.)
seconds of sound is cut off.
		– Select “PCMFIX” as instructed in “INPUT MODE” when you play 2-channel sources.	13
“U 70-1-1” appears on the	• The equipment connected by the HDMI cable is not compatible with the unit’s copyright protection		–
display.		technology.
“U 70-1-2” appears on the	• The unit has received a signal for a picture format that is incompatible with the HDMI connection.		–
display.		Check the settings of the connected equipment.
	• Should anything unusual happen using an HDMI connection:
“U 70-3” appears on the		Consult your dealer if the sign remains on the display after these steps.	–
		– Turn the connected equipment off and on again.
display.
		– Pull out the HDMI cable then reinsert it.	8
		– Reduce the amount of equipment connected in series to the HDMI terminal if exceeding 2 units.	–
The unit does not work	• The unit does not work properly when wrong cords are in HDMI input and output terminals. Turn the		8
properly.		unit off, unplug the AC power supply cord, and make connections again.
VIERA Link “HDAVI ControlTM”	• Connect the unit to your TV (VIERA) using the HDMI cable, switch the TV on, unplug the unit’s AC		–
does not function properly.		power supply cord, and insert it into a household AC outlet again.
■ Remote control
The remote control does not	•	Replace the batteries if they are worn.	4
work.
Other products respond to the	•	Change this unit’s remote control code to “REMOTE 2”.	21
remote control.

Maintenance

RQTX0175

If the surfaces are dirty

To clean this unit, wipe with a soft, dry cloth.

•Never use alcohol, paint thinner or benzine to clean this unit.

•Before using chemically treated cloth, read the instructions that came with the cloth carefully.

22