Oscilloscope Unaohm G4018

J

jkaltne1

Guest
Hello There!

Has someone Service Manual for above mentioned oscilloscope and send
me in PDF file (or similar).
Schematic diagram will also help.
Actually, I cannot adjust anymore "focus" and also "intensity" - became not
adjustable. Instead sharp line on the screen I have "smear" line...

Regards, Josip
 
jkaltne1 wrote:
Hello There!

Has someone Service Manual for above mentioned oscilloscope and send
me in PDF file (or similar).
Schematic diagram will also help.
Actually, I cannot adjust anymore "focus" and also "intensity" - became not
adjustable. Instead sharp line on the screen I have "smear" line...

Check the resistors in the path of those controls. They go up in
resistance and cause that problem. If they are OK, the CRT may be
failing.


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