Blaupunkt ProComponent PCA2120 Скачать руководство пользователя страница 12

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10 

SYMPTOM

No power (power light not on)

Power but no sound (power light is on)

No sound from one channel or entire side

Very low sound level

Power amplifier turns on and off
repeatedly (motor-boating sound)

Amplifier turns off during loud or distorted
passages

Amplifier performs fine but gets very hot
to the touch

Amplifier turn-on/turn-off pops or noises

Cracking noises on AM/FM radio but not
on tape or cd.  

Whining noise, engine running, varies in
pitch or loudness with engine speed,
AND varies with radio volume control
setting 

(this is generally a RADIO

installation problem)

Whining noise, engine running, varies in
pitch or loudness with engine speed,
BUT, DOES NOT vary with radio volume
control setting 

(this is generally an

amplifier installation problem)

PROBABLE CAUSE OR  CORRECTION

Check connections to amps +12 volt, ground, and remote lines.

Use voltmeter to verify voltages are at terminals of amp.

Check main power connection at battery.

Check fuse in power line at battery.

Disconnect all speakers but not power lines - if unit then turns on, a speaker short 
or speaker line touching vehicle chassis is likely.

Check all input cable lines for connection.

Disconnect speakers from amp, test speaker lines with digital voltmeter to verify >2 
ohms per channel (non-bridged mode).

Check radio’s balance and fader control positions - verify they are at center.

Check speaker connections at amp and speaker.

Check input leads for connection to amp.

Verify radio balance and fader controls are at center positions.

Check amplifier’s input gain control setting - adjust for higher output levels if 
necessary (gain settings closer to 0.3 volts).

Receiver may have very low output voltage levels - a step up “line driver” may 
have to be used.

Make sure power connections at batter are tight.

Verify battery voltage is >11.5 volts DC (12.5-15V engine on) at amplifier with engine off.

Check all radio and amplifier ground connections.

Input stage being over-driven - lower input gain (closer to 4 volt setting).

Verify battery voltage is >11.5 volts DC at amplifier with engine off.

Check all radio and amplifier ground connections.

Verify speaker loads >2 ohms on all channels (non-bridged mode).

Input gain control too high - lower accordingly (closer to 4.0 volt setting).

Verify speaker loads >2 ohms on all channels (non-bridged mode).

Verify the mounting location allows for free air movement around the amp.  
Preferably, the amp should be mounted with fins up and down so rising heat moves 
quickly away from amp.

“turn on race” - disconnect trigger from radio and turn on/off via a wire jumper to 
power terminal.  If noise goes away, the radio is turning on/off too slowly.  This is 
radio problem and can only be corrected with outboard turn-on delay relay system.

Radio “thump” - disconnect the RCA input lines to the amp and turn on/off via radio 
trigger.  If noise goes away without RCA lines connected, the radio is sending pops 
out through RCA lines.  This is a radio problem and can only be corrected with 
outboard turn-on delay relay system.

Ensure the problem is “radiated noise” by placing a portable FM radio near the car 
engine.  If noise is picked up, then it is a vehicle problem and not your system.
Research to isolate the source and properly shield or bypass.  

Are spark plugs and wires > 3 years old?  These can often radiate substantial noise 
when old.

Verify the engine block has a good ground connection to chassis ground.

Verify the engine compartment hood is grounded to vehicle chassis via a braided 
grounding strap.

Verify all power and ground connections are clean at radio.

Re-route radio power and ground so they are sourced from same connections back 
at amplifier (this is called a “common” ground).

Check all ground connections to ensure clean surfaces that have all paint removed 
and also not oxidation buildup over time.

Verify there is some kind of power filtering choke assembly at back of radio.  If not, 
install one.

Check battery ground connections at chassis are clean and tight, scraped free of 
oxidation, paint, and grease. 

Re-route radio power and ground so they are sourced from same connections back 
at amplifier (this is called a “common” ground).

Bypass all equipment between radio and amp (e.g., equalizers) directly connecting 
radio.  If noise goes away, signal processor has problem.  

Check for signal level “ground loops” - disconnect the outer shield of the RCA cable 
at one end of the cable (e.g., radio end).  If noise goes away, modify cables 
accordingly.  There are voltage differences at the ground connections of the 
components and these are NOT correctable any other way than such shield cutting 
or an outboard “ground loop isolator” which is a small transformer.

T

ROUBLE

-

SHOOTING

G

UIDE

Below is a basic trouble-shooting guide to assist in seeking out and correcting a problem that may occur in the installation
process.  Although lengthy, this chart cannot address every single problem possible but mainly the ones most common. 

www.midwestelectronics.com

Содержание ProComponent PCA2120

Страница 1: ...www midwestelectronics com...

Страница 2: ...tt 1 kHz dBA 80 80 Measured full rated power 0 1 THD dBA 97 101 Damping factor 100 100 Frequency response full range mode 20 30 000 Hz 20 30 000 Hz High pass crossover frequency limits 50 H z 250 Hz v...

Страница 3: ...verture de dos TABLE DES MATI RES Caracter sticas principales 22 Consideraciones de seguridad y precauciones en la instalaci n 23 Planificaci n del sistema 24 Herramientas de instalaci n 24 Alambrado...

Страница 4: ...here is a constant push for entry level amps to play with the big dogs yet for a low price point Rarely are they able to do so until now Rock solid Class AB designs ensure in your face sound with litt...

Страница 5: ...rotect the work areas from scratches or dings DISCONNECT THE LEAD ON THE BATTERY No sparks or fires please REVIEW THE INSTALLATION Before using any tools or moving vehicle components take five minutes...

Страница 6: ...ge tweeter speakers and usually better placement To build such a system though complexity goes up due to the addition of passive or active crossovers which take time to install and may inject noise in...

Страница 7: ...the amp Wire size gauge of the cables need to increase in size for higher power systems Wire sizes larger than those noted are usually a waste of time and money since they offer Little or no performa...

Страница 8: ...er output This line is required to go high 12V to turn on the amp If this line is not available use the power antenna line trigger which is normally available in most radios FUSE This fuse is only for...

Страница 9: ...elow 100Hz is usually best GAIN CONTROL The gain control allows for a range of 0 3 6Volts input This means that if the setting is a 0 3V it only takes 0 3Volts to drive the amp to full output Such a l...

Страница 10: ...M CONFIGURATION 1 Subwoofer Full Range Full Range Full Range Full Range 4 main For higher output you can connect a subwoofer to two output channels Look for the and to indicate the correct connections...

Страница 11: ...ven in the bass region where a dedicated subwoofer system operates most efficiently SYSTEM CONFIGURATION 3 Full Range Full Range Full Range OR HP Full Range OR HP Connect Speakers as shown For best so...

Страница 12: ...around the amp Preferably the amp should be mounted with fins up and down so rising heat moves quickly away from amp turn on race disconnect trigger from radio and turn on off via a wire jumper to po...

Страница 13: ...nce THIS WARRANTY SETS FORTH YOUR EXCLUSIVE REMEDIES WITH RESPECT TO THE PRODUCTS COVERED BY IT WE SHALL NOT BE LIABLE FOR ANY INCIDENTAL CONSEQUENTIAL SPECIAL OR PUNITIVE DAMAGES ARISING FROM THE SAL...

Страница 14: ...th Avenue Broadview IL 60155 www blaupunktusa com Copyright 2005 by the Robert Bosch Corporation No portion of this work may be reproduced in any form without the written consent of the Robert Bosch C...

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