[TechAssist] Re: Hitachi 27CX7B shutdown/odor-bonded yoke delema
- From: Gary McCartney <gary@xxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Sun, 15 Aug 2004 00:24:33 -0400
One time I had a similar dilema with the replacement yoke not making the
picture deflect wide enough so what I did was to take a permanent magnet
and set it on top of the horizontal width coil. Turning the magnet or
flipping it over caused the width to vary. I ended up epoxying the
magnet on the coil in the position that suited and covering it with
heatshrink (the coil was previously covered with heatshrink or other
wrapping). I shipped the set and have never heard back from the
customer. Not saying this is a proper repair but it seemed to work
anyway. I also measured the heatsink temperature of the HOT to make sure
it wasn't being driven too hard with that extra magnetic flux added to
the circuit.
Gary McCartney
McCartney Electronics
Guelph Ontario Canada
Est. 1984
email: gary (at) number63.ca
Peter oliver wrote:
> Hitachi
> 27CX7B
>
> Set came in late today with the complant that it had gone dead
> but started working again but would develop lines an an akrid odor. On bench
> testing at first turn on had a sllight trapizoid picture (smaller on top)
> for a moment with a severe divergance of the beam convergance, running did
> not show lines and the convergance recovered but the odor appears to be
> comming from the yoke so essentially a fatal situation (85% cetanity on yoke
> fault). The only apparent options would be try to cut off the yoke and find
> a replacement or replace the CRT assembly. Both options will probabbly be
> too expensive for the customer (haven't checked yet as am evaluating
> options) which may present the possibilty of getting left with the set. (did
> collect the estimate fee in advance) the yoke is a thompson yoke with the
> number 2G27012-03B. The CRT end suffix is X02, I have junkers with the X01
> suffix but most of the time the X01 suffix shows too wide of a picture for
> the X02 chassis. so the question is on equivants for the yoke (or insitu
> repair options) of how to modify the chassis to accept an X01 tube?
>
> Peter Oliver
> Tucson Radio TV
>
> _________________________________________________________________
> Check out Election 2004 for up-to-date election news, plus voter tools and
> more! http://special.msn.com/msn/election2004.armx
>
>
> -----------------------------------------------------------------------------
> Lost Password:
> http://www.tech-assist.org and select "Login Problems?".
> Email Archives:
> //www.freelists.org/archives/techassist/
>
-----------------------------------------------------------------------------
Lost Password:
http://www.tech-assist.org and select "Login Problems?".
Email Archives:
//www.freelists.org/archives/techassist/
Other related posts:
