Beolab 5 upper bass on-off issue

22 replies
MA
Offline
marexy
Silver
Posted June 16, 2023 at 03:07 GMT
#1642388
Hi

Hope anyone can help. Beolab 5  .SW 2.6 Seeial 21... has

bproblem that upper bass is going on and off ..at start all is ok after 10 min of playing it is starting to go on ad off.

Aany idea what can be wrong?

TThanks
NQVHNWI
Offline
NQVHNWI
BronzeFounder
Posted June 16, 2023 at 16:18 GMT
#1657096
Are you seeing a flashing red LED?

 
MA
Offline
marexy
Silver
Posted June 16, 2023 at 16:38 GMT
#1657097
No Led is green all the time. Totaly normal.
NQVHNWI
Offline
NQVHNWI
BronzeFounder
Posted June 16, 2023 at 18:15 GMT
#1657099
so you play music.....

what sort? light orchestral or big heavy boom bass? for 10 minutes?

no LED indication, then the whole speaker cuts out to standby (firm red LED)?

or just goes fully dead with no LED change?

or it continues to play the upper mid, lower treble and upper treble drivers? - just the 15inch sub goes down?
MA
Offline
marexy
Silver
Posted June 16, 2023 at 18:31 GMT
Edited June 16, 2023 at 18:43 GMT
#1657100
Led  stay green as normal in play mode. It paly's normal just upper mid- bas after some time cuts on and off. Like bad solder joit or bad connestion but i allready check that.  Maybe it is a litle sooner if i play loud yes.
NQVHNWI
Offline
NQVHNWI
BronzeFounder
Posted June 16, 2023 at 18:43 GMT
#1657101
I have known one of my BL5 to trip-out totally (red LED flashing) when playing very loud, very heavy bass.  It is Loudspeaker thermal protection. Fortunately, I did not have the problem if I didnt try to overload it and play normally. This is what the manual says....

The loudspeaker is equipped with a thermal
protection system which prevents the units
from overheating. Should an error occur, the
system automatically switches the loudspeaker
to standby – and the indicator light
flashes red.
To restore the situation:
> Disconnect the loudspeaker from the mains.
> Allow the system time to reset (approx. 3–5
minutes).
> Reconnect the loudspeaker to the mains again.

Should the problem persist, contact your Bang &
Olufsen retailer.

Regardless, it sounds like you have an internal fault and should get it checked out by an approved B&O service engineer.

 

 

 
MA
Offline
marexy
Silver
Posted June 16, 2023 at 18:48 GMT
#1657102
I repair  some B&O electronic.  But till now i had non of Beolab 5  to repair and that kind of error may be standard fault here ant there.  That are my personal speakers. Just hope for an answer from someone who has repaired that kind of error as here are some guys with a lot of knowledge on repaires :)
NQVHNWI
Offline
NQVHNWI
BronzeFounder
Posted June 16, 2023 at 20:18 GMT
#1657103
MA
Offline
marexy
Silver
Posted June 16, 2023 at 20:29 GMT
#1657104
Thanks, will try. Some time agoo had been more on forum as now have less and less time. Hope Lee or any other legend can geve some hint ??.
BE
Offline
BeosoundLondon
Bronze
Posted June 19, 2023 at 10:44 GMT
#1657132
Hi,

I thought I’d post here given somewhat related. I’ve recently acquired a pair of BL5- does sound great to my ears. I’ve just noticed not much sound seems to come from the dome upper bass driver (the one below the larger acoustic lense) - the dome seems to vibrate a little but I can’t hear much if I put my ear close it it - unlike the tweeter and the 2 other bass drivers. Same thing on both speakers.

i was curious if anyone else had the same experience ?

 
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