I recently inherited a Heathkit 35 MHz Dual Trace Oscilloscope Model IO-4235. It has not been used in aprox 15 years. it was in proper working order the last time it was used.
The unit turns on and I am able to obtain a trace with the panel controls set to the operation manual's preset specifications. I adjusted the Horizontal position and centered the trace right-to-left with no problems. The focus and intensity also adjusted without issue.
The only thing that I can not seem to adjust is the Y1 or Y2 vertical position. turning either knob produces no change on the CRT.
also, I am not able to get any type of wavelength to produce on this unit.
I have let the unit warm up for about 30 mins, no change.
I have visually inspected the circuit boards, nothing looks damaged
any suggestions on what to check next?
The unit turns on and I am able to obtain a trace with the panel controls set to the operation manual's preset specifications. I adjusted the Horizontal position and centered the trace right-to-left with no problems. The focus and intensity also adjusted without issue.
The only thing that I can not seem to adjust is the Y1 or Y2 vertical position. turning either knob produces no change on the CRT.
also, I am not able to get any type of wavelength to produce on this unit.
I have let the unit warm up for about 30 mins, no change.
I have visually inspected the circuit boards, nothing looks damaged
any suggestions on what to check next?