Crescendo audio Concerto Series Panduan Pemilik - Halaman 7

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TROUBLE SHOOTING

NO SOUND ( NO OUTPUT )

@ Please check all connections, cables' rounting, short & voltage

@ Please check the fuses , If they are blown, please replace with new one.

@ Please check whether speakers work well, you can test speakers by connecting to

another amplifier

PROTECTION

@ Please check overload, overheat ( thermal ), short and voltage, DC offset.

@ c3000.2D minimum working impedance is 1 ohm stereo or 2 ohm mono.

@ c2000.4D minimum working impedance is 2 ohm stereo or 4 ohm mono.

@ If amplifier is shut down due to heat, it will be on some minutes later after cooling down.

Please make better airflow and no obstruction around amplifiers for thermal protection

@ When over 4V DC comes into amplifier , then, It will be DC protected.

Check whether amplifiers work after removing RCA-Input.

If amplifiers work, then check DC by checking RCA-input .

When DC is over 4V at input, try by replacing +12V source unit .

DISTORTION & NOISE

@ Readjust input level and check the speaker quality at another amplifier

Replace poor quality speakers with good quality ones

@ Check amplifiers and headunit's ground contact. all grounds should be common.

@ Check Rca Jack, then repalce with new one or reroute Rca Jack.

@ Engine noise is caused by poor grounding of amplifiers, headunit, other components,

battery or alternator, so please check all grounding connection.

POOR BASS RESPONSE

@ Please check speaker cables and reverse polarity.