6. TROUBLE SHOOTING TIPS
NO SOUND ( NO OUTPUT )
@ Pls check all connections, cables' rounting, short, voltage at Digital-series amplifiers and
headunit
@ Pls check fuses ,If it is blown, pls replace with new one.
@ Pls check whether speakers work well, you can test speakers by connecting to another
amplifier
PROTECTION
@ Pls check overload, overheat ( thermal ), short and voltage. DC offset
@ Minimum working impedance is 1 ohm for single Digital-series amplifiers and 2 ohm for
linked operation.
@ If Digital-series amplifiers are shut down due to overheat, they will be on some minutes later.
pls make better airflow and no obstruction around Digital-series for thermal protection
@ Digital-series have Low and high voltage protection. Working Voltage is 9V~16V for
μDB-2500.1D Comp and 9V ~ 18V for μDB-5000.1D Comp .
so Voltage is lower than 8.5V or higher than 16V, μDB-2500.1D Comp will be protected.
Voltage is lower than 8.5V or higher than 18V, μDB-5000.1D Comp will be protected
@ When over 4V DC comes into Digital-series amplifiers, then, they will be DC protected.
Check whether Digital-series amplifiers work after removing RCA-Input
If Digital-series amplifiers work, then check DC by checking RCA-input L and R
When DC is over 4V at input, try by replacing headunit or source unit
DISTORTION
@ Readjust input level and check the speaker quality at another amplifier
Replace poor quality speakers with good quality ones
POOR BASS RESPONSE
@ Pls check speaker cables and reverse polarity of one channel
BUZZING SOUND
@ Check Digital-series amplifiers and headunit ground contact.
@ Check Rca Jack and repalce with new one or rerout Rca Jack.
WHINING NOISE
@ Engine noise is caused by poor grounding of Digital-series amplifiers, headunit, other
components, battery or alternator, so pls check all grounding connection.
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