Arcade Otaku - アーケード オタク

if you don't hear the three dings on power up then the issue is mainboard related, if dongle is missing or not seen you will get an alarm

tube will be compatible, yoke is not

h.hold 15 needs a tweek, otherwise could be a leaky cap

did you try store mode?

ms8-26 or ms8-25 or ms8-29?

not to state an obvious but you do have the remote boards plugged in?

yes not far from the vertical deflection ic

there is a resistor to change,R111 replace with 1 ohm

thats just glue they used, it looks worse than it is

maybe you tube has a problem, rare but possible

note there is a horizontal sub size pot on the main chassis as well to check

it could be just bad horizontal size pot
its does not look like a b+ issue as the vertical size remains stable, it does not look like a fault in the horizontal deflection circuit or a fault with the width control circuit as the picture would go super wide

horizontal should around 0.200 so sounds correct

desolder the entire crt socket and try it

there are two clips each side and almost the entire housing lifts off

yes well that is an odd issue
need to see you wiring
also if you disconnect the video signal and then locate the colour cut offs do all of these work?

turn up the screen volts adjustment on the flyback to see if you get anything onscreen

if the inductance readings are correct then look at the chassis caps, there a load 10uf 400v caps in centre area of the chassis that go bad
you are getting full deflection though which should rule out the yoke being the issue- possible it could have internal corrosion though

depends on tube and value of resistor already in location, my advice is put the chassis on the tube and see what happens first

what is the chassis model?
blue gun is full on, either a pot is bad, or drive transistor short, or something shorting in blue circuit or tube bad

yes yoke specs are the same, only issue may be heater resistor but that is nothing major