[TechAssist] Re: JVC AV-48WP30 dead, Thumps spkrs loudly

  • From: "Larry E" <videotech@xxxxxxxxxxxx>
  • To: <techassist@xxxxxxxxxxxxx>
  • Date: Wed, 19 Oct 2005 09:37:14 -0400

Bob, Thanks for the info, will order a few and take them with me when I go
out again,
strange that an IC on the crt boards would cause thump in the speakers eh?
You
learn something every week in this business, On an off note Winters coming,
you
ought to buy Phils shop and you could quit worrying about $4 a gallon
heating oil, he-he,
Larry Eastman
American TV & Electronics
Crystal River, Fl. 34428
----- Original Message -----
From: "Gemini Computer & TV" <geminitv@xxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Wednesday, October 19, 2005 9:04 AM
Subject: [TechAssist] Re: JVC AV-48WP30 dead, Thumps spkrs loudly


> No. The CRT driver ICs are prone to shorting and cause this symptom (I
just
> had one with those very symptoms and the green CRT driver IC was shorted).
> Disconnecting the CRT board does not clear the short on the board. Often
> then is a small burn mark on the CRT board under the affected IC (but not
> always). The IC should be a TDA6111Q. Be sure to note the proper position
of
> the IC as it should face with the letters TOWARD the heat sink!!!!
>
> 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@xxxxxxxxxxx
>
>
> ----- Original Message -----
> From: "Larry E" <videotech@xxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Wednesday, October 19, 2005 8:58 AM
> Subject: [TechAssist] Re: JVC AV-48WP30 dead, Thumps spkrs loudly
>
>
> Bob,  don`t have the schematic so I
> don`t know what I`m checking for ?  :)    Unsolder & Pull the IC off the
crt
> board(s) ? Remove
> crt board from tube, missing voltage(s)?   Thanks for your help, Larry E
> Larry Eastman
> American TV & Electronics
> Crystal River, Fl. 34428
> ----- Original Message -----
> From: "Gemini Computer & TV" <geminitv@xxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Wednesday, October 19, 2005 7:37 AM
> Subject: [TechAssist] Re: JVC AV-48WP30 dead, Thumps spkrs loudly
>
>
> > Larry,
> > Check the CRT driver ICs on each of the CRT boards.
> >
> > 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@xxxxxxxxxxx
> >
> >
> > ----- Original Message -----
> > From: "Larry E" <videotech@xxxxxxxxxxxx>
> > To: "tech-assist" <techassist@xxxxxxxxxxxxx>
> > Sent: Tuesday, October 18, 2005 1:43 PM
> > Subject: [TechAssist] JVC AV-48WP30 dead, Thumps spkrs loudly
> >
> >
> > Hi Guys, I don`t see many JVC`s and don`t have the print for this
> AV48WP30,
> > went out this morning and
> > as customer claimed on phone when you plug set in and turn on it makes a
> > loud  thump thump in both speakers
> > 20-30 times then relay clicks, the thump stops, and blue idiot light on
> > front goes dim/bright, dim/bright, have to unplug set to start this same
> > scenario over again. Never develops HV or audio,  Will order the service
> > manual today, but would
> > like to know if anyone has seen this before (should say "heard" this
> before)
> > tia, Larry E
> >
> > Larry Eastman
> > American TV & Electronics
> > Crystal River, Fl. 34428
> >
>
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