Digital Design M2b Instrukcja obsługi - Strona 11
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5. TROUBLE SHOOTING TIPS
NO SOUND ( NO OUTPUT)
@ Pls check all connections, cables' rounting, short, voltage at The M/SS-Class and headunit
@ Pls check fuses ,If they are blown or burnt, 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
@ Mlc, M2b and SSlb minimum working impedance is 1 ohm for single and 2 ohm for linked
operation.
@ If The M&SS-Class amplifiers are shut down due to overheat, they will be on some minutes later.
Pls make better airflow and no obstruction around The M&SS-Class for thermal protection
@ The Mlc, M2b and SSlb have Low and high voltage protection. Working Voltage is 8.5V 15V.
so Voltage is lower than 8.5V or higher than 15V, they will be protected.
@ When over 4V DC comes into the M&SS-Class amplifiers, then, they will be DC protected.
Check whether The M&SS-Class amplifiers work after removing RCA-Input
If The M-Class 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.
If there is still problem, Replace poor quality speakers with good quality ones
POOR BASS RESPONSE
@ Pls check speaker cables and reverse polarity of one channel
BUZZING SOUND
@ Check The M&SS-Class amplifiers and headunit ground contact.
@ Check Rca Jack and replace with new one or rerout Rca Jack.
WHINING NOISE
@ Engine noise is caused by poor grounding of The M&SS-Class amplifiers, headunit, other
components, battery or alternator, so Pls check all grounding connection.