TEK 475 Scope-stopped

[Dave_s]

Hi,

My favorite old TEK 475 Scope has suddenly stopped working.
Symptoms are:
No trace, screen is blank, intensity and focus control do nothing.
Beam Finder shows a dim small circle middle of screen.
When power is turned off, circle like BEAM FINDER same size is visble
and bright
for a breif moment.
Panel LEDS are lighted and do respond to switches being changed.
Screen graticule cannot be seen.

Any suggestions are welcome. I currently do not have an adequate
service manual,
just module layout and parts list. I am looking but cannot find the
TEKTRONIX
scope forum.
Thanks for any help. Dave_s

 

[Dr. Anton T. Squeegee]

Any suggestions are welcome. I currently do not have an adequate
service manual,
just module layout and parts list. I am looking but cannot find the
TEKTRONIX
scope forum.

http://groups.yahoo.com/group/TekScopes/

Sounds like power supply issues to me. First and foremost, get a
proper service manual. Second, use its info to check every electrolytic
in the power supply section.

Happy hunting.



--
Dr. Anton T. Squeegee, Director, Dutch Surrealist Plumbing Institute.
(Known to some as Bruce Lane, ARS KC7GR,
kyrrin (a/t) bluefeathertech[d=o=t]calm -- www.bluefeathertech.com
"If Salvador Dali had owned a computer, would it have been equipped
with surreal ports?"

 

[tekman]

Hi,

My favorite old TEK 475 Scope has suddenly stopped working.
Symptoms are:
No trace, screen is blank, intensity and focus control do nothing.
Beam Finder shows a dim small circle middle of screen.
When power is turned off, circle like BEAM FINDER same size is visble
and bright
for a breif moment.
Panel LEDS are lighted and do respond to switches being changed.
Screen graticule cannot be seen.

Any suggestions are welcome. I currently do not have an adequate
service manual,
just module layout and parts list. I am looking but cannot find the
TEKTRONIX
scope forum.
Thanks for any help. Dave_s

Hi Dave,

contact me via PM at [email protected] and I send you a scan of the 475
serv. manual free.

hth,
Andreas