Have been checking resistors to find any way off and so far none. Only resistor acting funny is the horizonal linearity resistor when set is turned on. Two purple tiny dots appear on it very shortly after set is turned on.
Sitting here staring at the schematic and just not even understanding it. Both sides of the focus coil are tied together through a 3000 ohm resistor. So I have for possabilities low power supply voltage, resistor drifted high, other circuit somewhere not pulling enough juice through focus coil.
Update: Horizontal resistor that had two 20k ohm resistors and a 56k ohm resistor measured 55k so both of the 20k ohm resistors had opened up. Cause of focus being off? We will see.
AMazing! Focus came more twards center of knob adjustment. Since I do not have a 8500 ohm 25 watt or better resistor to stick in there I went with 3 30,000 and one 56,000 ohm and I dont know their wattage so Im not sure IM overloading them or not. The brown 25 watt resistor is just being used as a holder, its totally open. I have 10 of the 56k and 10 of the 30k ohm resistors 5 watts rated to play with so resistor booger soldering job in progress. Decided to go with 56k times 6 which gets me 9k ohms. Question is how much off of 8500 ohms and how far off affects anything. I know the specs say 7500 for a 10 inch crt, so will 500 ohms make a difference? Also guessing everything now has to be adjusted again, since now the ion trap moved twards rear of crt to get the good spot. Temp gun says around 200 degrees at bottom of these 56k resistors but much lower at the top of them and thats just weird but if they arent burning up then Im good and no more magical purple resistor eyeballs. Im done with screwing with adjustable open wire resistors as they damage and open up very easily!
So, tell me Im not imagining things because I had to move the ion trap magnet rearward after dropping from 55k ohms to 9k ohms on the horizontal linearity resistor r444.
09-28-2024, 04:24 AM
Hybrid Mode
