[TechAssist] Re: Sharp 27R-FS1 widescreen 27" TV data bus noise in left ch line audio out
- From: "Gemini Computer & TV" <geminitv@xxxxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Fri, 6 Feb 2004 11:10:33 -0500
I am downloading the manual now and will upload it to the members area right
afterwards.
Bob Waterman, CET® #RI-28
Master Technician License #9109
Service Manager / Parts Manager
Gemini Computer, TV, & Security Alarms
(508)695-7302
(508)695-7769 FAX
geminitv@xxxxxxxxxxxxxxxx
geminitv@xxxxxxx
www.geminicomputertvsecurityalarms.com
----- Original Message -----
From: "Leonard G. Caillouet" <lcaillo@xxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Friday, February 06, 2004 10:58 AM
Subject: [TechAssist] Sharp 27R-FS1 widescreen 27" TV data bus noise in left
ch line audio out
> If anyone has access to the manual on this one I'd appreciate an upload.
I
> have a faint leakage of clock and data noise in the left channel line
> output. It is NOT in the speaker output at all, is not affected by
volume,
> and is on both ant and A/V inputs. It is muted when changing channels,
> inputs, etc, but is there and changes when displays are activated. The
> noise is still audible when the consumer mute is activated, but not when
> automatic muting occurs. It is a ticking sound that is perfectly
> coordinated with the pulses on the data line.
>
> Apparently the sound is routed through the MTS module as unplugging this
> board causes all sound, from tuner or A/V in to cease. No ticking when
this
> board is out. At this point it would be pretty easy to isolate it if I
had
> a schematic of the sound signal path.
>
> Any service bulletins on this? We let our authorization for Sharp go a
year
> or so ago becuase we rarely sold any of their products and thought the
> policy of replacing multiple boards as standard procedure is silly and
> excessive (we only sold the HD products, for which this was the policy)
and
> we rarely see any Sharp come in. The $100 a year for Sharpnet was just
not
> worth the cost when we only would use it once a year or so.
>
> Any help is appreciated. Thanks
>
> Leonard G. Caillouet
> Electronics World
> Gainesville, FL
> 352-332-5608
> 352-332-5668 (fax)
>
>
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