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<DIV>Good for you in solving the first problem.</DIV>
<DIV> </DIV>
<DIV>One thing you can do to try to get the right set of boards back is see if
there are serial numbers on the boards. Sometimes there were. Look
at the serial numbers of the machines and thus you might figure out that the
lower card serial number will go with the lower serial
number machine. Another way is if there is a big difference between
the serial numbers of the machines, the dash numbers on the boards may be
different. Higher dash number, later production. Also if there is a
different assembly number, then the board is not compatible with an earlier
machine. Usually means there was a change to the back plane in that
case. </DIV>
<DIV> </DIV>
<DIV>Lastly, if you set the machine up in manual mode and it does not get it
perfectly, but close, check the DG controls. Sometimes they are so far
from normal that it looks strange. This is a real extreme situation and
probably does not apply. But I throw it out for consideration.</DIV>
<DIV> </DIV>
<DIV>Chris Hill</DIV>
<DIV> </DIV>
<DIV>
<DIV>In a message dated 7/14/2011 8:15:52 P.M. Eastern Daylight Time,
lasvegastvengineer@yahoo.com writes:</DIV>
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<DIV>Hi Ted, </DIV>
<DIV> </DIV>
<DIV>Got part of the problem fixed with the low RF. </DIV>
<DIV> </DIV>
<DIV>Turns out that the pre-amp of a NTSC/PAL AVR3 is different
than a NTSC only. </DIV>
<DIV>When I got the right amp in the right machine, the RF came
back to were it should be. </DIV>
<DIV> </DIV>
<DIV>The interesting thing is now I have lost Auto Chroma on that
machine. (And it's not the #4 card) </DIV>
<DIV>The manual says that several of the cards have to work
together to get it to auto chroma and unfortunately we did not
write down what we had swapped out between machines. </DIV>
<DIV> </DIV>
<DIV>Makes a good picture on manual so not really to enthusiastic
to find the right combination. </DIV>
<DIV> </DIV>
<DIV>As for cleaning, I still have 3 gallons left of the old
xylene that California banned 10 years ago. </DIV>
<DIV>Toxic as you can believe, but brings back heads like nothing
else will. </DIV>
<DIV> </DIV>
<DIV>Lee </DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV><BR><BR>--- On <B>Wed, 7/13/11, Ted <SPAN>Langdell</SPAN>
<I><ted@quadvideotapegroup.com></I></B> wrote:<BR></DIV>
<BLOCKQUOTE style="BORDER-LEFT: rgb(16,16,255) 2px solid; PADDING-LEFT: 5px; MARGIN-LEFT: 5px"><BR>From:
Ted Langdell <ted@quadvideotapegroup.com><BR>Subject: Re:
[QuadList] Problem AVR 3--Did this ever get
identified/fixed?<BR>To: "Quad List"
<quadlist@quadvideotapegroup.com><BR>Date: Wednesday, July
13, 2011, 6:03 PM<BR><BR>
<DIV id=yiv3452677>
<DIV>Hi, Lee,</DIV>
<DIV><BR></DIV>
<DIV>Just wondering whether you were able to track down the
problem and fix it.</DIV>
<DIV><BR></DIV>
<DIV>Ted</DIV>
<DIV><BR></DIV><BR>
<DIV>
<DIV>On Apr 6, 2011, at 8:48 AM, lee williams wrote:</DIV><BR class=yiv3452677Apple-interchange-newline>
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<DIV>Have a interesting problem with one of my AVR 3's.
</DIV>
<DIV> </DIV>
<DIV>I have consistently low RF readings at the tracking
meeter and can't get the RF up to normal levels. </DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV>Here is what I see. </DIV>
<DIV> </DIV>
<DIV>A known good hi band tape that will display RF
between 80-85 in any other machine will only display
10-15. </DIV>
<DIV> </DIV>
<DIV>Low Band light always on.</DIV>
<DIV> </DIV>
<DIV>Auto Chroma won't respond on #4 card. </DIV>
<DIV> </DIV>
<DIV>Looking at the Demod in the wave form monitor, the
sync level looks 10 IRE low. </DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV>Here is what I have tried. (all swap
outs are with known working machines) </DIV>
<DIV> </DIV>
<DIV>Swapped out pre amp behind head. </DIV>
<DIV>Changed out MDA (it was bad with other
issues) </DIV>
<DIV>Swapped out every card in the lower frames. </DIV>
<DIV>Changed out power supply frame. (it had cap
problems with other issues) </DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV>This one has me good. </DIV>
<DIV>Nothing visible as far as the wiring harness.
</DIV>
<DIV>I am kind of running out of things to swap/look at.
</DIV>
<DIV> </DIV>
<DIV>Has anybody else ever experienced this one? </DIV>
<DIV> </DIV>
<DIV>Also, </DIV>
<DIV>Were will the get together be at NAB? </DIV>
<DIV>Plan on being there for Monday and Tuesday. </DIV>
<DIV> </DIV>
<DIV>Thanks </DIV>
<DIV>Lee </DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV><BR> </DIV></TD></TR></TBODY></TABLE>_______________________________________________<BR>Please
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<DIV>
<DIV style="MARGIN: 0px"><FONT style="FONT: 12px Helvetica" size=3 face=Helvetica>Ted Langdell</FONT></DIV>
<DIV style="MARGIN: 0px"><FONT style="FONT: 12px Helvetica" size=3 face=Helvetica>Secretary</FONT></DIV>
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