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<DIV>T;here may be one on the transport that tells the tape is loaded.
Check to see if there are other sensors.</DIV>
<DIV> </DIV>
<DIV>
<DIV>In a message dated 1/13/2012 8:43:47 A.M. Eastern Standard Time,
dixie@westpoint.tv writes:</DIV>
<BLOCKQUOTE
style="BORDER-LEFT: blue 2px solid; PADDING-LEFT: 5px; MARGIN-LEFT: 5px"><FONT
style="BACKGROUND-COLOR: transparent" color=#000000 size=2 face=Arial>Hi
Dennis et All<BR><BR>I thought the same but I have checked the cassette
compartment and when I <BR>nsert the cassette it changes a voltage on the
relevant connector<BR><BR>David Dean<BR>Westpoint Television<BR>Archiving
Services<BR>2" Quad , 1" B, 1"C, D1, D2, D3, D5, HDCam and HDV<BR>.5", EIAJ,
In Various Standards where supported<BR>Alchemist Ph.C conversions with Clean
Cut<BR>Snell and Wilcox Ukon for HD frame rate conversions and Up and Down
<BR>conversions<BR>Digital Vision DVNR with scratch and dropout
concealment<BR>Tel 020 8742 3400<BR>----- Original Message ----- <BR>From:
"Dennis Degan" <DennyD1@verizon.net><BR>To: "Quad List"
<quadlist@quadvideotapegroup.com><BR>Sent: Friday, January 13, 2012
12:11 PM<BR>Subject: Re: [QuadList] ot Help with a Betamax Circuit
Diagram<BR><BR><BR>><BR>> On Jan 13, 2012, at 4:54 AM, David Dean
wrote:<BR>><BR>> >Whilst everybody is talking about Circuit diagrams
I would be<BR>> grateful for any help with a Sony Betamax SLO 420, The
machine will not <BR>> load a cssette, if you wind the cassette
compartment by hand it will then <BR>> load and play. I have checked
the compartment and that is seeing the <BR>> cassette but it is
not loading it. The fault appears to be on the SS10 <BR>> board, but
all I can see it do is go into a big square chip and a little <BR>>
sub board !<BR>> > Funilly enough it will eject the tape !<BR>> >
Thanks for the bandwith<BR>><BR>> I offer:<BR>><BR>> David, before
you get too deep into circuitry, I'd suggest you check all <BR>>
mechanical trouble spots first. Most of these problems are caused
by bad <BR>> microswitches, little actuators, or sensors that tell
the electronics <BR>> what state the mechanical parts are in.
Often, these sensing devices <BR>> fail or get out of alignment,
preventing the cassette tray from loading, <BR>> for example.
I'll bet that there is a microswitch inside that should be <BR>>
actuated when a cassette is loaded. My guess is that this
microswitch is <BR>> not working properly. A tipoff is that you
indicated that the machine <BR>> will correctly eject the cassette.<BR>>
Though electronics can fail, it is not first on the troubleshooting
list.<BR>><BR>> Dennis Degan, Video Editor-Consultant-Knowledge
Bank<BR>> NBC Today Show, New
York<BR>><BR>><BR>><BR>><BR>><BR>>
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<BR><BR><BR><BR>_______________________________________________<BR>Please trim
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