OK So I've pulled it, yoke wires seem connected OK, I've tested the continuity from the yoke to the RGB chassis connector, fine.
mikejmoffitt wrote: January 5th, 2021, 10:24 pm
Without deflection you might expect a hole to be burned within seconds.
Use an ohmeter and check that you get some resistance on both windings of the deflection yoke (with it powered off, disconnected from the chassis). This way you can check that your yoke is not somehow an open circuit.
Will try this next, need to work out exactly what I need to do first
You would want to put the meter in ohms/resistance mode and measure for resistance between what looks like the red and yellow wires, and the blue and green wires.
If it's not open circuit you should see a different resistance on each pair, if it is open circuit the meter will display 0 or 1 to denote infinity. (depend on your meter).
most likely expanation is either the yoke is not plugged in correctly or on correct5 pins or the flyback is bad
to lose both vertical and horizontal deflection is quite an odd fault
Had a look at this with fresh eyes this evening, I tried testing connections and wiggling sockets... Saw some odd movement on one of the little side boards, pushed it away from the board and the joints are shagged,
3 wires connect here, and what are those 3 wires you ask?
Horizontal
Vertical
Ground
I'll re-solder this later in the week, fingers crossed this is it, because it's been quite the bloody saga
grantspain wrote: January 27th, 2022, 2:42 pm
most likely expanation is either the yoke is not plugged in correctly or on correct5 pins or the flyback is bad
to lose both vertical and horizontal deflection is quite an odd fault
OK thanks, I'll re-look at the yoke / test if the flyback is duff.
I hear nothing at all from the CRT, usually you can hear them fire up, just dead.
Edit, will also check HOT.
Edit 2 - HOT ok, chat tonight yielded good suggestion, will pull chassis/tube and run direct from a stepdown outside of the cab.
OK ravepants checked and made some adjustments to the wiring (Thanks again )
Another step forward tonight hopefully, the quite loud buzz is coming from the transformer CVT-003M as circled below, does this shed any light on the next step
matt5cott wrote: August 24th, 2022, 10:03 pm
OK ravepants checked and made some adjustments to the wiring (Thanks again )
Another step forward tonight hopefully, the quite loud buzz is coming from the transformer CVT-003M as circled below, does this shed any light on the next step