EagleTG
Active member
I'm working on a D9200 that has neck glow, but no HV. To be sure, I tested the HV output with an HV probe and got just under 1000V (so the HV isn't totally gone on this one).
Cranking the screen control does not generate any raster.
It clicks on initial start-up, but only within seconds of the initial start-up. It does not continue clicking. It almost reminds me of when I've seen K7000's go into HV shutdown, as you get that initial pulse sound, but nothing after that.
I've tested all of the parts listed by the WG troubleshooting guide under the "no raster" section , and they all test comparable to a known-good part. (Including Q401, Q425, IC401 and IC403). I've also extensively Googled on this one, and have confirmed that the parts involved in similar issues I found also seem to test good.
I've done a ton of component-level testing (unpowered), concentrating on the larger silicon components (transistors, bridges, VR's, etc). I've also gone over the board with an ESR meter to confirm the capacitors are all within spec.
It looks like it is time to pull R854 and test for voltage.
Any further suggestions?
Thanks again, all.
Cranking the screen control does not generate any raster.
It clicks on initial start-up, but only within seconds of the initial start-up. It does not continue clicking. It almost reminds me of when I've seen K7000's go into HV shutdown, as you get that initial pulse sound, but nothing after that.
I've tested all of the parts listed by the WG troubleshooting guide under the "no raster" section , and they all test comparable to a known-good part. (Including Q401, Q425, IC401 and IC403). I've also extensively Googled on this one, and have confirmed that the parts involved in similar issues I found also seem to test good.
I've done a ton of component-level testing (unpowered), concentrating on the larger silicon components (transistors, bridges, VR's, etc). I've also gone over the board with an ESR meter to confirm the capacitors are all within spec.
It looks like it is time to pull R854 and test for voltage.
Any further suggestions?
Thanks again, all.
