Repair Tips - Bang & Olufsen BeoLab 9 6217 Service Manual

3.2

Repair tips

Repair tips
Hum in speaker when no music is played
Power Link
MK III
Standby LED
The Power Link cable must be of type MK III or higher.
The ground connection in Power Link cable lower than MK III may be insufficient
for optimum sound performance.
The standby LED indicates the status of the BeoLab 9.
Standby LED STATUS
Red BeoLab 9 is in standby.
Green BeoLab 9 is operating.
Orange BeoLab 9 is shut down due to thermal overload.
If the LED Status is orange, turn off and disconnect the product from the mains.
Wait for minimum 5 minutes for the speaker to cool down.
Connect mains and turn on BeoLab 9.
If the LED status still is orange the fault may be due to:
1. Woofer protection – perform speaker check.
2. Tweeter protection – perform speaker check.
3. Midrange protection – perform speaker check.
4. NTC-board or connection on one of the woofers.
Access the NTC-board by dismantling the woofer.
4. Power supply failure.