• 1720 vector scope

    On line manual which is the user and service manual doesn't have a schematic
     problem with the 1720 is wont come on.
    there is dc voltage on the SMPS power transistor  but nothing on the secondary.
    I have work on SMPS in the past so I'm familiar with them.
    if there is a common failure part that would be nice to know.
    if not a schematic would be very helpful
    Thank you
    Doug