Audiopipe APK-700.5 - Manual (Page 12)

6. 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.
Digital monoblock amplifiers ( APK-2500, APK-3500, APK-4500 & APK-5500 ) minimum
working impedance is 1 ohm for all amplifiers as single unit and 2 ohm stable for
the strapped operation.
Full range multi channel amplifiers ( APK-250.2, APK-400.4 & APK-700.5 ) minimum working
impedance is 2ohm stereo or 4ohm mono. CH5 of APK-700.5 is 2ohm stable only.
If amplifiers are shut down due to heat, they will be on some minutes later after cooling
down. Please make better airflow and no obstruction around amplifiers for thermal
protection
APK-250.2, APK-400.4 & APK-700.5 working voltage is 14.4V.
APK-2500 working voltage is 8.5V ~ 16V.
APK-3500, APK-4500 AND APK-5000’s working voltage is 8.5V ~ 18V.
When over 4V DC comes into amplifiers, then, they 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.