Troubleshooting

If the receiver is not working as it should, the following suggestions might help. If you follow the suggestions in this chart and the receiver still does not work properly, contact your local RadioShack store for assistance.

Problem	Cause	Solution


Power does not turn on.	Power cord is disconnected.	Plug in the power cord.

	Protection circuit is activated.	Unplug the power cord, then plug it in again.

The receiver does not respond	Static discharge has affected control.	Unplug the power cord, then plug it in again.
to button presses.		(If static electricity is a problem, use the re-
		mote control whenever possible.)

No sound.	Incorrect connections.	Check and correct the connections.

	The mute function is activated.	Press MUTING.

	The volume is turned down.	Turn up the volume.

	Speaker wires are disconnected.	Connect the speaker wires.

	Neither set of speakers is selected.	Press in SPEAKERS A or B.

	Tape 2 monitor function is engaged.	Press TAPE 2 MONITOR so TAPE 2 disap-
		pears from the display.

No picture when you select a	The selected video source is not set	Correct the problem with the selected video
video source.	correctly.	source.

	Incorrect connections.	Correct the connections.

High noise level.	Station not correctly tuned.	Tune to a stronger station.

	Antenna not connected.	Connect the antenna.

	FM antenna still coiled or is not point-	Stretch both ends of the antenna taut and re-
	ing in the correct direction.	position the antenna.

	AM loop antenna not pointing in the	Adjust the AM loop antenna.
	correct direction.

	Noise is coming from another electri-	Try using an AC line noise filter to reduce the
	cal appliance.	noise.

Cannot make copies of video	Tapes are protected by a copy restric-	You cannot make a usable copy.
tapes.	tion method.

	Video connections are incorrect.	Check and correct the connections.

Remote does not control cas-	Cassette deck or CD player not com-	This feature works only with Optimus Profes-
sette deck or CD player.	patible.	sional Series components.

	Control cable is not plugged in.	Properly connect the control cable.

	Audio cables are not plugged in.	Properly connect the audio cables.

Returning Controls to Factory Defaults

Press RETURN on the receiver to return the controls to the following settings.

Tape 2 Monitor	Off

Source	TUNER

Speakers A	On

	FM or AM (Set to the last-tuned frequency. If the receiver
Band	cannot receive the frequency, it starts searching for the next
	strong station.)

Surround Mode	Off

Loudness	Off

Muting	Off

STAV-3680 specifications

The Optimus STAV-3680 stands as a remarkable advancement in the field of heavy-duty machinery, combining efficiency, durability, and state-of-the-art technology. This vehicle is designed for various applications, including construction, mining, and agricultural tasks, showcasing an impressive versatility that meets the demands of today's dynamic work environments.

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The machine incorporates cutting-edge hydraulic technology that enhances its lifting capabilities and operational efficiency. The hydraulic system is designed for easy maintenance and quick responsiveness, allowing operators to perform complex tasks with precision. Its lifting capacity is impressive, enabling the movement of heavy loads with minimal effort.

The Optimus STAV-3680 is equipped with an ergonomic operator cabin that prioritizes comfort and safety. The cabin features adjustable seating, intuitive controls, and excellent visibility, significantly reducing operator fatigue during long shifts. Additionally, safety features such as roll-over protective structures (ROPS) and falling object protective structures (FOPS) ensure that operators are safeguarded against potential hazards.

One of the standout characteristics of the STAV-3680 is its adaptability to various attachments and implements. This flexibility allows it to perform numerous functions, from lifting and digging to grading and hauling, making it a multifunctional asset on any job site. The quick-attach mechanism streamlines the process of switching between different tools, enhancing productivity.

In terms of technology, the Optimus STAV-3680 is equipped with advanced telematics systems that provide real-time data on machine performance and diagnostics. This feature allows for predictive maintenance and efficient fleet management, helping businesses to minimize downtime and reduce operational costs.

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Overall, the Optimus STAV-3680 exemplifies innovation and reliability, making it a leading choice for industries that demand high performance and versatility in their machinery. Its robust construction, combined with advanced technologies, positions it as a valuable investment for any operation.