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

  • From: "Gemini Computer & TV" <geminitv@xxxxxxxxxxx>
  • To: <techassist@xxxxxxxxxxxxx>
  • Date: Wed, 19 Oct 2005 09:04:20 -0400

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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