[TechAssist] Re: JVC - TV - AV-27050 - Chassis A68 - Shutdown
- From: "David Lessard" <mrfixit@xxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Mon, 16 Jun 2003 20:19:44 -0400
I don't have another LA7832 to sub, however I did pull the old one from the
board to inspect it. It looks heat damaged, some of the white letting on the
IC is faded. The area on the PCB around LA7832 has turned brown. I fired up
the TV without the vertical IC, it still shutdown, so I'm not sure if the
LA7832 is causing the problem. Personally I can't see it being the problem,
this IC is powered by secondary flyback voltage, if this IC were a "load"
problem one would think the fuse resistor off the flyback would open or the
IC would pop/short.
I will order a LA7832 or two, there that cheap, and check out your
suggestion.
If anyone else wants to contribute a thought, please don't hesistate.
David Lessard
Alexandria Electronics
Ontario-Canada
mrfixit@xxxxxxxxxxx
-----Original Message-----
From: techassist-bounce@xxxxxxxxxxxxx
[mailto:techassist-bounce@xxxxxxxxxxxxx]On Behalf Of David Lessard
Sent: Monday, June 16, 2003 7:59 PM
To: techassist@xxxxxxxxxxxxx
Subject: [TechAssist] Re: JVC - TV - AV-27050 - Chassis A68 - Shutdown
Fernand, This TV has full deflection, until shutdown occurs. Was this the
case with the TV you were working on? Did you have a full screen before the
TV went into shutdown?
David Lessard
Alexandria Electronics
Ontario-Canada
mrfixit@xxxxxxxxxxx
-----Original Message-----
From: techassist-bounce@xxxxxxxxxxxxx
[mailto:techassist-bounce@xxxxxxxxxxxxx]On Behalf Of Fernand Goguen
Sent: Monday, June 16, 2003 11:45 PM
To: techassist@xxxxxxxxxxxxx
Subject: [TechAssist] Re: JVC - TV - AV-27050 - Chassis A68 - Shutdown
I had one like that a few months ago and it turned out to be the vertical
out IC LA7832 I think. Very common on JVC TV's.
FERNAND GOGUEN
GOGUEN TV SERVICE
----- Original Message -----
From: "David Lessard" <mrfixit@xxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Monday, June 16, 2003 4:32 PM
Subject: [TechAssist] JVC - TV - AV-27050 - Chassis A68 - Shutdown
> Customer brought this in from another shop. TV fires up for about 5
seconds,
> shuts down, then front LED blinks. +B is a steady 134V while the TV is ON,
> 107V during shutdown. I'm not very fimiliar with JVC TV products. No
> schematic. Any pointers in the right direction would be greatly
appreciated.
>
> David Lessard
> Alexandria Electronics
> Ontario-Canada
> mrfixit@xxxxxxxxxxx
>
>
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