RE: radio or speaker problem

[Phil and Judy Rose <pjrose@servtech.com>]

>Phil:
>Sounds like an intermittent ground or B+ supply (12v).
>Some addroit alligator jumping ( one at a time ) may help diagnostics
>and isolation
>1st. ground parallel
>2nd. 12v supply from a fused source.
>Also check solid clean ground connection at battery level.
>After this tests.....
>Does the display blink in synch with sound ?
>Are some of the Bose speakers amplified ?
>If yes can the noise be attributed to rear ?...front ?   both ?
>Does the noise contain some " program material " (music, voice)?
>You will need more data to try to isolate issues (problems)
>HTH
>Pablo

>I am learning a bit more about the Bose system for the V8q ... it appears to
>me that the system uses a stock blue-dot ;) radio, with Bose doing its
>"magic" at the speakers.  Can you tell if it is only one speaker unit that
>is causing the noise, or is it common to all channels?  If it is common it
>is likely to be in the head unit.  You might be able to unplug the speaker
>units individually to see if you can make the problem go away.
>
>Good luck!
>Steve Buchholz
>San Jose, CA (USA


Yes the Bose speakers (each) are amplified. No lights are blinking. Noise
seems to come from only the rear speakers, although it's not possible to
say (yet) if both (R&L) sides are doing it. The fade control didn't have
any effect. Yes, some low level of program material can be heard while it's
booming.

I'll start checking things out (PCBs, grounds, power) tomorrow morning.

I suppose it's too "easy" that the loss of the ground connection for the
rear window's heating element (& antenna?) would be related to this (?).
Still need to fix _that_ though. Just go at it with my soldering gun, or
low power soldering iron? How likely is that window to crack while heating
and applying a bit of solder? Any BTDTs?

Thanks,
Phil


         **********************************************
         *  Phil & Judy Rose     E-mail:              *
         *                       pjrose@servtech.com  *
         **********************************************