Hello.
Please would you advise on where to start looking for the following faults on my Heathkit IO-4510 dual trace 'scope:
1. right hand section beam not present.
2. Left hand section beam present but cannot be focused to a fine line.
Any suggestions will be greatly appreciated.
Comments
Hello!
What have You check so far?
Do You have some measurement results from power-supply stage?
(Instruments and experience needs with HIGH VOLTAGE measurements around CRO Tube !)
Tips:
- In most case, cause of irregular focusing can be in wrong Tube biasing (please, check resistor divider
R601 thru R606)
- Do you have voltage (line thickness on display) change while adjusting ASTIG potmeter (R569)
- +195V(for ASTIG) and -1000V (stabilized), tensions are present?
Best Regards,
Feri
Sorry for grammar.
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