Tektronix mHz 2 Channel Oscilloscope. Be the first to write a review. Free shipping. Skip to main content.
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Welcome, Guest. Please login or register. Did you miss your activation email? This topic This board Entire forum Google Bing. Print Search. Colorito Newbie Posts: 3 Country:. Hello, This is my first topic in this forum, I will apreciate help with that, thanks in advance. The guy who had it broked it plugin a bare wire to the wall Vac plug, i suppose he connected the ground to the hot wire. When I powered it for first time, the green led is on but nothing in the screen. Searching the failure with the service manual i found that the high voltage for the CRT is dead.
Any suggestions to continue? Many many thanks!!!!! JPG Hello Coromanadalix, and thanks for your repply and taking time to me!! Do you advise me to change Q8 and Q9 too? I don't have any idea off what is most probably damaged in that case of blown up ground conected to hot line Many Thanks again for your time and sharing your knowledge!!!
Dont change parts thinking it may solve all problems Thanks, I will do it as you are suggesting. I supposed Testing the junctions with a multimeter is enough in that case? I will update the thread ASAP.
Thanks ;- T. Armadillo Super Contributor Posts: Country:. U2 is dead. Aside from that, C20 must be checked. Anyway, time to change. I think both play the part of the 50Khz Oscillation. U2 for regulation of the Voltage, C20 for the 50Khertz. But U2 must be working to talk about C For the 2 transistors, you need to measure the BCE voltages of the 2 to confirm. The manual says all referenced to -8v but I think as long as you are consistent with the measurement with reference to ground, should be easy to understand.
There was an error while thanking. SMF 2. EEVblog on Youtube.
Kenwood Cs-4025 20mhz 2 Channel Oscilloscope | Tested