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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 OUTPUT light comes on (dim lighting to see) with power on and Yelp selected it is OK. Check the speaker(s) or leads for possible shorting.
PROBLEMS
Symptom | Possible Cause | Check |
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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 the OUTPUT light on front panel coming on in Yelp? |
| Internal fuse blown | Is an external fuse or circuit breaker used? |
| Loose connection at power source | Are the negative leads connected to a good ground? |
No siren tone - | High Voltage Protection | 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 Auxiliary 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 | Is the | |
| Aux Input set to wrong function | Is the AUX_I option configured properly? |
| Yelp Override option installed | Is the YLP_O option selected? |
Phaser not work- | Phaser disabled | Is the P_I option selected? |
ing |
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Horn not working | Horn disabled | Is the H_I option selected? |
PARTS
The following parts are available from Carson Manufacturing Company, Inc.:
Part | Description |
CP3966 | Bolt, mounting, |
CP3571 | Bracket, mounting |
Connector, | |
Cover (not including chassis) | |
ATO/ATC 20A | Fuse, 20 Amp Automotive |
CP4852 | Knob, selector switch |
CP4750 | Microphone, Noise Canceling w/Connector |
CP3633 | Microphone Bracket with mounting Screws |
Microphone Strain Relief | |
CP4119 | Transistor, output (2 required) (Industry standard TIP36C, Not Texas Instruments) |
ED1558 | Hardware Kit (Connector, bolts, microphone bracket with screws) |
CP4874 | Instruction Manual |
CP4874B | 05/07/05 |
