Primary Troubleshooting procedure has a step where all cables should be checked and reseated if necessary. J7 on the backplane, which was a bit off (a little out on one side) I feel had a bit of effect in that the fan now moves a bit now when the rear power switch?is turned on. The unit has to have been off for a bit for this movement to occur.?
The above took me to the LV PS Troubleshooting procedure, which, puzzlingly, if no "secondary voltages" on J2, directs the issue on the backplane. I do not understand this, as no output from the PS board would mean to me there are issues on it, not somewhere else. But of course, also, a short somewhere else may suppress?any output. But on all rails??
Nevermind, I hopped on the?Backplane Troubleshooting?next, as directed by the troubleshooting workflow. On its Figure 6-49, I am asked to disconnect P2 (which is something between A07 and A25). Can anyone shed some light on what this "P2" is? I have not been able to identify it in the manual, if my life depended on it. But maybe someone having worked on this before may know.
On Mon, Sep 5, 2022 at 10:46 AM Michael <mlynch002@...> wrote:
I have two of these, the power supplies are very problematic.? I have replaced the PS on both of my TDS460A models.? I was even able to repair one supply and bring it back to life by replacing some regulators on the boards. ?
