Isolating Heater Voltage - Heater pin identification?

midcoastsurf

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Isolating Heater Voltage - Heater pin identification?

I am working on isolating the send and return heater pins on my monitor, but I am not sure which two pins are the heater pins. My monitor is a Pentranics CH288, 33" monitor.

Going clockwise, from left to right, on the parts side, the letters around the connector on the neckboard read: E, BK, E, H, RK, G2, GK, E, G1. I am guessing that the "H" pin is one of the heater pins, but what is the other heater pin?

Thanks in advance!
 
heater

Look for the two most top pins as the neck board sits on the tube. These are your heater pins. With power off put your meter leads on and check for 2-6 ohms and when you find them those are your heater pins.
 
I'd look up the tube in the rejuvenator manual: http://www.bkprecision.com/download/documentation/100-CRT.pdf . That'll tell you what adapter to use, and at the bottom is the pinout for all the adapters.

And yeah, the reason you need to isolate the heater is because one side of the heater is connected to power and the other side is grounded. This causes the guns to be grounded when shorted to the heater. So H is your heater power, and one of the E pins is the ground on the other side of the heater.

DogP
 
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