MB QUART Nano NSC 2100 Installation Manual page 31

Malfunction: no function
Reason:
1. The power supply connection of the device is not correct.
2. The cabels have no mechanical or electrical contact.
3. The remote turn-on connection from the headunit to the amplifier is not correct.
4. Defective Fuses. In case of replacing the fuses, attend by any means the correct fuse rating.
Malfunction: no signal on loudspeakers, but POWER LED lights up white
Reason:
1. The connection of the speakers or the RCA audio cables is not correct..
2. The speaker cables or the RCA audio cables are defective.
3. The loudspeakers are defective.
4. High pass controller (Subsonic Mode) in LP/BP operation is adjusted to high.
5. No signal from headunit.
Malfunction: one or more channels/controllers are without function / faulty stereo stage
Reason:
1. The balance or fader controller of the headunit is not in the zero-position.
2. The connection of the speakers is not correct.
3. The loudspeakers are defective.
4. High pass controller in LP/BP operation is adjusted to high.
Malfunction: distortions on the loudspeaker's signal
Reason:
1. The loudspeakers are overloaded.
Malfunction: No bass or stereo sound
Reason:
1. Interchange of loudspeaker cable polarity positive (+) and negative (-).
2. The RCA audio cables are loose or defective.
Malfunction: amplifier runs into protection mode (PROTECT LED lights up red)
Reason:
1. Short circuit on the loudspeakers or cables.
2. Overheated by too low speaker impedance.
3. Insufficient air circulation by a inappropriate mounting position of the amplifier.
4. Overloaded by insufficient power supply (too thin profile section on the power cables).
Malfunction: hiss or white noise on the loudspeaker's signal
Reason:
1. The level controllers are turned up.
2. The treble controller on the headunit is turned up.
3. The speaker cables or the RCA audio cables are defective.
4. The hissing is caused by the headunit.
31
NSC2100/NSC475
T R O U B L E S H O O T I N G
Remedy:
Recheck
Recheck
Recheck
Replace Fuses
Remedy:
Recheck
Replace cables
Replace speakers
Turn down controller
Check headunit settings
Remedy:
Turn to zero-position
Recheck
Replace speakers
Turn down controller
Remedy:
Turn down the level
Turn down the level on the headunit
Switch off loudness on the headunit
Reset bass EQ on the headunit
Remedy:
Reconnect
Reconnect or replacing the cables
Remedy:
Reconnect
Choose a higher impedance
Use a new speaker setup
Change the mounting position
Ensure air circulation
Use a bigger profile section
Remedy:
Turn down the level
Turn down the level on the headunit
Replacing the cables
Check the headunit