Denon DRA-F100, DCD-F100 manual Troubleshooting, Protector circuit

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12TROUBLESHOOTING

Check the following once more before assuming there is a problem with the system.

1.Are connections proper ?

2.Is the system being operated as explained in the operating instructions ?

If the system does not seem to be operating properly, check as shown on the table below. If none of these checks apply to the problem, the system may be malfunctioning. Disconnect the power cord immediately and contact your store of purchase.

	Symptom	Cause	Countermeasure	Page
	Power does not turn on	• Power cord is not plugged into a power	• Plug the power cord securely into an	6
	when power switch is	outlet.	outlet.
	pressed.
		• VOLUME control is turned down.	• Set the control to an appropriate	7
	No sound is produced from		position.
General		• Headphones are connected.	• Disconnect the headphones.	7
	the speakers.
		• Speaker cords are not securely con-	• Connect securely.	6
		nected.
	No treble sound is	• Speaker polarities (< and >) are	• Connect the speaker cords properly.	6
	produced, or the position of	inverted.
	the instruments is unclear.
	A source other than the	• Function is not properly set.	• Set the desired function using the	7
	desired one is heard.		FUNCTION button.
	Hissing sound is heard in	• Antenna direction is poor.	• Change the direction of the antenna.	5
		• Signals from the broadcast station are	• Install an outdoor antenna.	5
	FM programs.
		weak.
		• Noise from a TV or interference from a	• Turn the TV off.	–
Receiver	Hissing sound is heard in	broadcast station.
			• Change the direction of the loop	–
	AM programs.
			antenna.
			• Install an outdoor antenna.	5
		• Signals on the power cord are being	• Insert the power cord in the opposite	–
	Humming sound is heard in	modulated by the power source	direction.
	AM programs.	frequency.
			• Install an outdoor antenna.	5
	Total number of tracks not	• Disc is loaded upside-down.	• Reload the disc.	15
		• Disc is dirty.	• Clean the disc.	19
	displayed when disc is
		• Disc is not of the specified type.	• Replace with a disc of the specified	–
	loaded.
			type.
	Nothing happens when	• Disc is loaded upside-down.	• Reload the disc.	15
	oper-ating buttons are	• Foreign object on disc tray.	• Remove the disc and the foreign	15
	pressed.		object.
player	Disc stops in the middle of	• Disc is dirty.	• Clean the disc.	19
	a track and will not play	• Disc is scratched.	• Replace with an unscratched disc.	–
	properly.
CD
		• Dirt, fingerprints, spittle, etc. on disc.	• Clean the disc.	19
	Sound is broken.	• Disc is scratched.	• Replace with an unscratched disc.	–
		• Player is in an unstable place and	• Place the player in a stable place with	–
		vibrates strongly.	no vibrations.
	Humming sound is heard	• Signals on the power cord are being	• Insert the power cord in the opposite	–
		modulated by the power source	direction.
	when disc is played.
		frequency.

•Protector circuit

The DRA-F100 is equipped with a high speed protector circuit.

This circuit protects internal parts from being damaged by strong currents generated in the set should the set be operated when the speaker terminals are incompletely connected or short-circuited.

If this protector circuit is activated, a relay sound is produced, the output to the speakers is interrupted, and the function and power LEDs flash to indicate that there is a problem. If this should happen, unplug the power cord, check the speaker connections, then plug in the power cord and turn the power back on. After several seconds, a relay sound is heard and the set starts operating properly.

•The set may not operate properly due to such external influences as lightning or static electricity. If this happens, either turn off the power with the receiver’s SYSTEM power operation switch or unplug the power cord, wait approximately 5 seconds, then plug the power cord back in.

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