DC 300.4 Руководство пользователя - Страница 7

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5. 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 ampli er

PROTECTION

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

@ Minimum working impedance is 1 ohm for 1100.1 & 2100.1.

2ohm stereo or 4ohm bridged for 300.4 & 1000.4.

@ If ampli ers are shut down due to heat, they will be on some minutes later a er cooling down.

Please make be er air ow and no obstruction around ampli ers for thermal protection.

@ All ampli ers working voltage is 9V ~ 16Volts.

@ When over 4V DC comes into ampli ers, then, they will be DC protected.

Check whether ampli ers work a er removing RCA-Input.

If ampli ers 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 ampli er.

Replace poor quality speakers with good quality ones.

@ Check ampli ers 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 ampli ers, headunit, other components, ba ery or

alternator, so please check all grounding connection.

POOR BASS RESPONSE

@ Please check speaker cables and reverse polarity.