modessitt
Volunteer: Encyclopedia Submission Moderator
Brought in a K7201 that "worked fine for a few months, then died."
Installed all new caps. Caps have been verified as installed properly, and no bad solder on them. HOT and VR have been tested as good, and the flyback appears okay. No cold solder joints found, and all parts listed in the WG Troubleshooting Chart for the K7201 have been checked.
Monitor is still dead.
There are no signs of life - no ticking, no neckglow, nada. Power has been verified into the monitor, and can be measured on the output of BD001.
I guess I should check the output (and input) of T3 next? Where's the best place to measure the B+ and what should it be - 126v? Is there a way to disable the shutdown circuit to determine if the issue is in the power supply or the HV section - maybe D10? Is the B+ and PS troubleshooting for this similar to the regular K7000?
Thanks for any ideas...
Installed all new caps. Caps have been verified as installed properly, and no bad solder on them. HOT and VR have been tested as good, and the flyback appears okay. No cold solder joints found, and all parts listed in the WG Troubleshooting Chart for the K7201 have been checked.
Monitor is still dead.
There are no signs of life - no ticking, no neckglow, nada. Power has been verified into the monitor, and can be measured on the output of BD001.
I guess I should check the output (and input) of T3 next? Where's the best place to measure the B+ and what should it be - 126v? Is there a way to disable the shutdown circuit to determine if the issue is in the power supply or the HV section - maybe D10? Is the B+ and PS troubleshooting for this similar to the regular K7000?
Thanks for any ideas...
