Lexicon MC12B (non-HD) Calibration bug? - AVS Forum
Forum Jump: 
 
Thread Tools
post #1 of 4 Old 12-07-2012, 01:23 PM - Thread Starter
Member
 
mwhealton's Avatar
 
Join Date: Oct 2002
Location: San Francisco CA
Posts: 110
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
Have any of you MC12B (non-HD) owners experienced a bug in the calibration routines like this:

One channel gets no signal during the internally-generated calibration signal tests. This includes both the 'whoop' sounds and the whitenoise.

History of the problem:

Rev level: V4 Room EQ.

After moving across the country, I needed to change the system over from 7.1 to 5.1 for a while.
After setting the cross-over options for the rear speakers to 'not present', I ran calibration . No problems.
Then, after setting up my new room, I changed back to 7 active speakers.
Now, calibration produces no signal for the Left Side speaker (# 7 in the calibration noise sequence).
This is not due to a dead speaker. Sourced audio sends signals correctly, and swapping the left for right speakers at the amp causes the behavior to switch over to the right speaker (now 7th in the calibration sequence).

Temporary workaround:
SInce the side speaker placements are symmetrical w.r.t. the listening position, I manually set the LE speaker using calibrated distance and level infromation from the RE speaker. So the system runs and is roughly balances, but I can't get to the Room EQ menus due to the speaker not present error.

I did send a message to Lexicon support through the Lex web page, but since the unit is discontinued, I'm not sure an answer will be forthcoming.

Hoping I don't have to reset the system to troubleshoot this one!
mwhealton is offline  
Sponsored Links
Advertisement
 
post #2 of 4 Old 12-07-2012, 03:50 PM
Member
 
dryeye's Avatar
 
Join Date: Nov 2007
Posts: 157
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Liked: 19
Although I don't own the same model as you ( mine's a 12BHD) I also experienced missing test tones. In my case the tones went missing from the subwoofer channels but playback of movies and music still produced the appropriate sounds in the sub channels. I ended up sending it in for repairs which were done for a very reasonable cost.
dryeye is offline  
post #3 of 4 Old 12-07-2012, 05:37 PM - Thread Starter
Member
 
mwhealton's Avatar
 
Join Date: Oct 2002
Location: San Francisco CA
Posts: 110
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
dryeye :
I did get a callback from Lexicon Support (Thanks Greg!). Seems like the recommendation (sned in for repairs) is the same in my case.
Since only the actual calibration sounds are missing , he thinks it is almost certainly hardware related.


What was the turnaround time for your repair?
mwhealton is offline  
post #4 of 4 Old 12-08-2012, 09:15 AM
Member
 
dryeye's Avatar
 
Join Date: Nov 2007
Posts: 157
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Liked: 19
About 3 weeks total round trip. Mine was a faulty chip. Otherwise it ran fine. I did wait months before parting with it since I had no backup preamp to use. Pyramid Audio in Texas did the work.
Peter Nielsen likes this.
dryeye is offline  
Reply Ultra Hi-End HT Gear ($20,000+)

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page


Forum Jump: 

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off