Service, Problems, Symptom Possible Cause Check

SERVICE

This unit is designed to provide years of reliable service under even the worst conditions. Many times there may appear to be a problem with the unit when the true problem is in the speaker(s), controlled devices, or improper installation. The following chart shows typical symptoms and possible causes.

A blown internal siren fuse doesn't necessarily mean that the unit is bad. If a speaker or speaker lead is shorted this fuse will blow before the unit is damaged. Disconnect the SPKR leads and replace the fuse. If the unit itself emits a low level sound when in the Yelp position it is OK. Check the speaker(s) or leads for possible shorting.

PROBLEMS

Symptom	Possible Cause	Check
No Power or siren output	Power switch not turned on	Does backlighting come on?
	Bad Speaker	Do you hear a “pop” when turned on?
	Connector or connections loose	With siren on, yelp selected, listen for tone in amplifier.
	Internal siren fuse blown	Is an external fuse or circuit breaker used?
	Loose connection at power source	Are the power leads connected to a good buss?
No siren tone –	High Voltage Protection	The input voltage must be less than highest rating.
PA works	Mic button stuck	Does mic button release properly?
	Cutout activated	Does siren work when Cutout input is disconnected?
	Cutout Polarity Option set wrong	Is the CUT P option properly configured?
No PA	PA volume not set properly	Try turning the PA volume control.
	Selector in Radio position	PA is not available in the Radio position.
Distorted siren sound	Speaker assembly loose	Is the speaker bell or tip loose?
	Intermittent Aux Input connection	Is the Aux Input used and wired properly?
	Low vehicle voltage	The input voltage must be greater than lowest rating.
Intermittent siren tone	High Voltage Protection	Is the vehicle voltage regulator working properly?
	Connector or connections loose	Is the connector tight on the back of the unit?
	Loose connection at power source	Check for loose leads back to power source.
	Mic button activation	Is something lying on the microphone?
	Circuit breaker in supply	Is a circuit breaker used with at least 50A rating?
	connection
Horn or Manual or	Horn switch stuck	Does the Horn switch return fully when released?
Phaser stuck on	Man/Phsr switch stuck	Does the Man/Phsr switch return fully when released?
	Aux Input improperly connected	Is the Aux Input used and wired properly?
	Aux Input Polarity Option set	Is the AUX P option properly configured?
	wrong
No Radio	Unit not connected to a radio	Is the radio connected properly to the unit?
	Radio volume too low	Can you hear the radio in the vehicle?
		Try turning the RAD volume control.
Wrong siren tone	Two-Tone option installed.	Is the T-T option jumper cut?
	Aux Input set to wrong function	Is the AUX I option jumper configured properly?
Phaser not working	Phaser disabled	Is the PHSR option jumper cut?
Horn not working	Horn disabled	Is the trace cut that disables the Horn switch?
Automatic Siren not	Selector in Radio position	Siren tone is not available in Radio position.
working	Automatic Siren disabled	Is the internal red lead cut from lever switch board?
Automatic Siren in all	No power to red lever switch lead	Do the lever switch relays turn on devices?
lever switch positions		Check for power at red lever switch lead.

Lever switch not working	No power to red lever switch lead	Do the lever switch indicators light?
in all positions	No ground at siren connector	Check for power at red lever switch lead.
Lever switch not working	Loose lever switch output	Does the lever switch indicator light?
in some positions	connection on lead
Lever switch not working	Loose lever switch output	Does the lever switch indicator light?
in some positions	connection on lead
Lever switch output	Internal relay contacts fused from	Is the output current exceeding 20AMPS?
stays on	overheating
Rocker switch outputs	No power to rocker switch	Is the corresponding fuse blown?
not working	Loose rocker switch output	Does the rocker switch indicator light turn on?
	connection on lead
TB0346A	Page 11 of 12		05/07/05

SC-407-10, SC-407 specifications

The Carson SC-407 is a versatile and compact scanner that stands out in today's market for its robust features and advanced technologies. Designed for both personal and professional use, this scanner combines efficiency with high-quality output, making it an ideal choice for users in various fields, including education, business, and healthcare.

One of the main features of the SC-407 is its impressive scanning speed. Capable of handling up to 30 pages per minute, this scanner ensures that even large document batches can be processed quickly without sacrificing quality. This speed is further complemented by its ability to scan both sides of a page simultaneously, thanks to the built-in duplex scanning technology. This feature not only enhances productivity but also reduces the time spent on repetitive tasks.

In terms of connectivity, the Carson SC-407 offers multiple options, making it incredibly user-friendly. Equipped with USB 3.0, users can connect the scanner to their computers with ease. Additionally, it supports wireless connectivity, allowing for scanning directly to cloud services or smartphones without the need for a physical connection. This flexibility caters to the modern user’s need for convenience and mobility.

Quality is paramount in the SC-407’s design. It boasts a high resolution of up to 600 dpi, ensuring that scanned documents are clear and crisp. This feature is particularly beneficial for scanning detailed images, graphics, or text documents that require precision. Furthermore, the scanner includes advanced image enhancement technologies, such as automatic color detection and background removal, which improve the visual quality of the scans.

Another notable characteristic of the SC-407 is its compact design. Lightweight and easily portable, it can fit seamlessly into any workspace environment. This is particularly advantageous for users with limited desk space or those who need to take their scanner on the go.

In conclusion, the Carson SC-407 combines speed, quality, and versatility in a compact package. Its advanced features, including duplex scanning, high-resolution output, and multiple connectivity options, make it an indispensable tool for anyone looking to streamline their document management process and enhance productivity in an increasingly digital world. Whether for personal or professional use, the SC-407 is designed to meet the needs of today's users effectively and efficiently.