bittner XB400 - 6 Troubleshooting

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6 Troubleshooting

Page 107

6 Troubleshooting

Problem: The unit cannot be switched on.

• Cause: Power cord not connected properly. Mains power not available. Main power fuses defect.

• Solution: Check the power cords and the mains power supply. Check the main power fuses at the back

panel of the ampliﬁer.

Problem: Ampliﬁer is switched on, audio signal supplied but LED SIGNAL doesn’t illuminate.

• Cause: Audio input cable defect or not properly connected.

• Solution: Check the audio signal cables and the signal source.

Problem: SIGNAL LED is on, but no sound.

• Cause: Speaker cables are not connected properly, or loudspeaker defect. Speaker cables connected to

the wrong channel, or polarity in SPEAKON connector not according to the norm.

• Solution: Check the speaker cables and the loudspeakers.

Problem: No communication to the control computer.

• Cause: Wiring incorrect.

• Solution: Check wiring in general, check polarity of the data cables, check additional ground connec-

tion for the data cables between devices.

Problem: No communication to the control computer, or to a single ampliﬁer.

• Cause: Invalid address is set.

• Solution: Check DIP-Switches on the back panel of the SXL, address 0 to 15 possible in one system,

same address in one system will cause failure.

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