Onkyo SKW-501 Auto-standby problem

[tipster71]

Hi There,

I have an Onkyo SKW-501 subwoofer. The issue, and I gather it is common, is that the Auto-Standby circuitry is way too sensitive.

The sub keeps switching on and off (blue to red light) and associated click continuously. Even when the LFE level is cranked to the maximum from my Onkyo AV Receiver it still will switch off in quiet moments.

Does anyone have a schematic or service manual for this sub at all? Would like to bypass the auto-standby circuit or adjust its sensitivity.

Many thanks,

Nick

 

[rpdesign]

Check hookup and settings - i.e. crossover point, is it too low, or mains as large with out extra base setting on, and also remember this little gem straight from Dolby (their words, not mine)...:

LFE does not equal subwoofer

​

Dolby Digital programs may include a bass-only LFE channel, but this channel
does not correspond directly to a subwoofer output. It is possible for a program to
contain an LFE channel, but a decoder may provide no subwoofer output because
all of the bass information in the program, including the LFE channel, can be
reproduced by the main speakers. The opposite is also true: it is possible for a
program to not contain an LFE channel, yet a decoder may provide a subwoofer
output because some or all of the main speakers are unable to reproduce the bass
information in the program. The difference between the LFE channel and the
subwoofer output is that the LFE channel is used to carry additional bass
information in the Dolby Digital program while the subwoofer output represents
how some or all of the bass information will be reproduced.