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Tektronix 475 scope

Hi!

I just have to keep nagging about the scope. Now I found out that two double transistors (Q914 and Q938) are badly overheating - they are actually too hot to touch (around 50C). The strange thing is that all the voltages around them are as specified in the schematic diagram. I am beginning to wonder if the temperature is normal (quite a strange thing since there are no heat sinks mounted on them). Any reply would be very appreciated!

Thank you!

Andrekj Nussdorfer

Reply to
Andrej Nussdorfer
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snipped-for-privacy@hotmail.com (Andrej Nussdorfer) wrote in news: snipped-for-privacy@posting.google.com:

First,don't trust the voltages on the schematics. Second,that hot temp is not normal.

--
Jim Yanik
jyanik-at-kua.net
Reply to
Jim Yanik

Did you mean to say "not abnormal"

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    Boris Mohar
Reply to
Boris Mohar

Boris Mohar wrote in news: snipped-for-privacy@4ax.com:

The parts should not be that hot.Something's wrong. Got a link to a 475 sweep schematic?

--
Jim Yanik,NRA member
jyanik-at-kua.net
Reply to
Jim Yanik

Hi!

Actually I do have a link! The schematic is

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Unfortunately the schematic was quite badly scanned (low res) and is a pain to read (specially the part values and designators).

Thank you again!

Andrej Nussdorfer

Reply to
Andrej Nussdorfer

two

all

I

would

Download the full manual from

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Be patient because that site has a limit of 10 simultaneous FTP connections, and there are lots of people trying to download from it. Best chance to get a connection is to hit it very late at night or very early in the morning.

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Tweetldee
Tweetldee at att dot net  (Just subsitute the appropriate characters in the
address)

Never take a laxative and a sleeping pill at the same time!!
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Tweetldee

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