G07 Repair Question

[jimmyjet]

I am working through Randy Fromm's repair flowchart.  He says to check the regulated power supply at R1.  "The terminal closest to the CRT should measure +120VDC."  Using my DMM, what do I connect the leads to.  I tried the red lead to the white wire on the resistor and the black to the chassis ground.  Is this correct?  I got 0 VDC.  Please help a novice.
Thanks
jimmyjet

[Ken Layton]

Yes, that giant white resistor gets the "+" (red) meter lead and the frame ground gets the black meter lead. If you get zero volts then the small soldered-in fuse on the monitor is blown. When that happens, that large gray filter capacitor then holds a full 135 volt dc charge with no place to go! It packs a wallup if you touch it. With power disconnected and picture tube discharged, take the monitor board out and flip it over. Touch a 60 or 100 watt ordinary house light bulb across the + and - terminals of that large capacitor. The light buld will glow bright for about 2 seconds (it does NOT damage the bulb). That discharges that cap safely so you can work on the chassis.

If that little fuse is blown then the flyback and/or the horiz out transistor are bad.