Led Indicator Is Flashing Slowly Orange - Bang & Olufsen BeoLab 18 Service Manual

Fault symptom:

LED indicator is flashing slowly orange

(the product is close to overheating)
Possible causes:
Defective PCB30, Digital Sound Engine
Defective PCB35, Amplifier
Defective PCB48, NTC Tweeter
Defective PCB48, NTC Woofer
Defective speaker unit
Disconnect product
from mains, wait 2
minutes and
reconnect to mains
OK?
Tip
Use ServiceTool to read out
Error Log.
Replace the suspected module
related to the Error Log
**
Board temperature - PCB30, Digital Sound Engine
Power Supply temperature - PCB04, Power Supply
Amplifier temperature - PCB35, Amplifier
Read out the Replace the
temperature ** suspected module
related to the high
Seems normal? temperature
Read out the
resistance of the tweeter
temperature of the
(wires disconnected):
tweeter
Tweeter = 6.3Ω ± 0.6Ω
Seems normal?
Replace PCB35,
Use ServiceTool to
calibrate the new
Read out the
resistance of the woofer
temperature of the
(wires disconnected):
woofer
Woofer = 11.2Ω ± 1.2Ω
Seems normal?
Replace PCB35,
Use ServiceTool to
calibrate the new
Disconnect PCB48, P1 on tweeter
and woofer and confirm 470kΩ at
Replace PCB30,
Digital Sound
Measure the DC Replace defective
Use ServiceTool to
calibrate the new
OK?
Amplifier
module
Measure the DC
Replace defective
Use ServiceTool to
calibrate the new
OK?
Amplifier
module
Disconnect the product
from mains.
PCB48, NTC P1 pin 1-2
OK?
Engine
Fault flow chart
tweeter
speaker unit
woofer
speaker unit
Replace Defective
PCB48, NTC
Survey of plugs and pins - see page 2.13
2.7
No
Yes