[TechAssist] Re: JVC AV-32D502-chassis=A94 shuts down
- From: <support@xxxxxxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Tue, 6 Jan 2004 23:12:29 -0500
Tom,
From Tech Repair CD:
JVC\AV32D502\Starts-then shuts down\\\\Vertical IC(LA7841)\Also check
C424-found solder splash on top of
PCB between leads\\\\\\\
Jeff Dougherty
Intrepid Video TV/VCR
263 S Front St
Steelton PA 17113
fax...717-564-4952
www.intrepid-video.com www.tech-repair.net
----- Original Message -----
From: "Tri-County Tv" <tricountytv@xxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Tuesday, January 06, 2004 4:29 PM
Subject: [TechAssist] JVC AV-32D502-chassis=A94 shuts down
Greeting,
I went on service call to repair this TV armed with schematic
(thanks to Bob Waterman) but
was unable to find the problem in the customers home so I lugged it into the
shop, got it on the bench and
have found the reason the TV shuts down as soon as you turn it on is because
there is .7v on pin 32 of
IC101 (TB1253AN) called a 1 chip decoder or fancy name for jungle ic but anyway
pin 32 is X-ray protect,
if I ground this pin TV will come on but has bowed picture on each side.
Strange thing is the voltage that
is shutting the TV down seems to be coming from IC101 pin 32 because if I lift
the pin the TV still shuts
down, ground the pin and TV comes on and there is no voltage coming from x-ray
protect circuit. When the
TV is on the voltage on pin 29 (ew-pin out) is way off which is making the
picture bowed. I am thinking
this IC-101 is bad, has anyone had a TB1253AN fail, and also can you use one
made by another manufacturer
because Tritronics has that chip made by Toshiba for 16.62, Sharp for 13.86 and
JVC for 42.73, that's a
big difference in price. Any help would be greatly appreciated.
Tom Berger
Tri-County TV
Robbinsville
North Carolina 28771
Ph--828-479-6043
Fax-828-479-4868
(tricountytv@xxxxxxxxxxxxx)
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