Service, Problems, Symptom Possible Cause Check

Page 10 of 12

SC-407-10 Ver. B Installation and Operating Instructions

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) or improper installation. The following chart shows typical symptoms and possible causes.

A blown internal fuse doesn't necessarily mean that the unit is bad. If a speaker or speaker lead is shorted the internal fuse will blow before the unit is damaged. Disconnect the SPKR leads and replace the fuse. If the siren emits a 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	Power switch not turned on	Does backlighting come on?
output	Bad speaker(s)	Do you hear a "pop" when turned on?
	Connector loose	Is an external fuse or circuit breaker used?
	Internal fuse blown	Are the negative leads connected to a good ground?
	Loose connection at power source
No siren tone -	High Voltage Protection	The input voltage must be less than highest rated voltage.
PA works	Mic button stuck	Does mic button release properly?
	Cutout activated	Does the 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	Have you tried turning the PA volume control?
	Selector in Radio position	PA is not available in the Radio position
Distorted siren	Speaker assembly loose	Is the speaker bell or tip loose?
sound	Intermittent Aux Input connection	Is the Aux Input used and wired properly?
	Low vehicle voltage	Input voltage must be greater than lowest rated voltage.
Intermittent siren	High Voltage Protection	Is the vehicle voltage regulator working properly?
tone	Connector loose	Is the connector tight on the back of the unit?
	Bad power connection	Is there a loose connection on a power lead?
	Mic button activation	Is something lying on the microphone?
	Circuit breaker in supply connection	Is a circuit breaker used with at least a 50A rating?
Horn function	Horn switch stuck	Does the horn switch return fully when released?
or	Man/Phsr switch stuck	Does the Man/Phsr switch return fully when released?
Manual or Phaser	Aux Input improperly connected	Is the Aux Input used and wired properly?
stuck on	Aux Input Polarity Option set wrong	Is the AUX P option properly configured?
No Radio	Unit not connected to radio	Is the radio connected properly to the unit?
	Radio volume too low	Can you here the radio in the vehicle?
		Have you tried 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 jumper configured properly?
Phaser not work-	Phaser disabled	Is the PHSR option jumper cut?
ing
Horn not working	Horn disabled	Is the trace cut that disables the Horn switch?
Automatic Siren	Siren Control in RAD position	Is the siren set to the RAD position?
not working	Automatic Siren disabled	Is the lead cut between the lever switch board and the
		siren board?
Automatic Siren	No power to lever switch board	Do the lever switch indicators light fully?
works in all posi-		Do the lights work with the lever switch on?
tions
Lever switch not	No power to lever switch board	Do the lever switch indicators light?
working at all	No ground at siren connector	Does the siren work?
Lever switch not	Loose output connection on lever	Does the lever switch indicator work in those positions?
working in some	switch lead
positions
Rocker switch not	No power to rocker switch	Is the corresponding fuse blown?
working	Loose rocker switch output lead	Does the rocker switch light when turned on?

05/07/05

CP4842C

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.