[TechAssist] Re: JVC TV AV-27980 No OSG, No PIX, Sound OK

  • From: "Intrepid Video Support" <support@xxxxxxxxxxxxxxxxxx>
  • To: <techassist@xxxxxxxxxxxxx>
  • Date: Fri, 21 Nov 2003 22:59:11 -0500

David,
From Tech Repair CD:
JVC\AV27980\Unit has high voltage but no sound or video. If the G2 is increased 
the set will have
raster.\\\\Look at the  Data and Clock at the Jungle IC. When checking at 
IC201(28 &27) the 5 volt peak to
peak was OK on  28 the SCL3 was only 1 volt on 27.\Isolating the IIC bus's by 
disconnecting the
peripherals discovered the PIP module was loading down the IIC BUS. Internally 
in the PIP module we\found
by floating the IC201(23) the load on the Clock line returns to normal. Tech 
needs to replace the IC201 in
the PIP module part number LC74411.\\\\\\

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: "David Lessard" <mr_fixit@xxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Thursday, November 20, 2003 10:51 PM
Subject: [TechAssist] JVC TV AV-27980 No OSG, No PIX, Sound OK


Any help would be greatly appreciated. No OSG, and no PIX via jack or
tuner. HV is present, secondary voltages check OK.  You can hear the
sound and the channels change (cable/tuner usage) but no picture.
Suspect: broken video path from jungle IC (capacitor) or worse, bad
jungle. Thanks in advance. God Bless America (North & South).

Alexandria Electronics
50 Harrison Street
Alexandria, Ontario
K0C-1A0

mr_fixit@xxxxxxxxxxxx


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