25k7401 flowchart or Vertical question...

[castlesteve]

Is there a 7401 flowchart out (like the 7000 series)?

I am getting ready to diagnose a NO VERTICAL DEFLECTION problem.  In most of these cases it was C51, 50hz or worse case IC2...  but in this case the 7401 doesnt have these parts.

Should I just start with replacing U601 or is there something else to test first?

[sarge]

Check all 600 series electrolytics, D603, Substitute U601 (TDA1771).  If all those check good, check your 25 volt supply line coming off your flyback.