How to test DK Horizontal Output Transistor

DeLoreanRide

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I'm trying to rebuild a DK Sanyo 20-ez Monitor and am wondering how to test the Horizontal Output Transistor.

I pulled it out of the the circuit and am testing the continuity.
On the HOT with the meter in diode checker mode:
Between the Base and Emmitter, either direction I'm reading "069".
Emmitter to Collector one direction is open the other direction is "545".
Base to Collector one direction is open the other direction is "490".

This seems correct right? No completely open legs and no shorted legs.

Now testing the actual circuits that the legs are connect to, with the meter in diode checker mode:
Emmitter to base either direction reads shorted or unobstructed; ( about .6 ohms)
Base to collector obviously has a capacitor because its resistance is going up; one direction tops out at about "1620" the other direction climbs then shows open.
Emmitter to collector has a capacitor because its resistance is going up; one direction tops out at about "1620" the other direction climbs then shows open.

Anyway can anyone verify how these circuits should be?

Is there any tried and true way to test an HOT? Thanks!
 
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I just installed a full cap kit and replaced they flyback transformer and I'm still getting nothing.

The monitor powers up for a second then goes out. You can hear the high voltage for about a second then nothing; no neck glow or anything.
 
I've been using the flowchart. It's a great tool. I guess I'm at "Screen goes blank after a few seconds".

Can you adjust the B+ voltage if there is nothing on the monitor?
 
Yes.
You have to actually measure the voltage at the test point. Doesn't matter if anything is on screen. If the voltage is too high it will shutdown the monitor. If the voltage is staying high and unadjustable, then there is still another problem.
 
Yes.
You have to actually measure the voltage at the test point. Doesn't matter if anything is on screen. If the voltage is too high it will shutdown the monitor. If the voltage is staying high and unadjustable, then there is still another problem.

Ok so my B+ voltage is 164 volts and adjusting the potentiometer wont change anything :(

Any idea what problems would cause that? I checked the pot with the ohm meter and it seems to be in check as far as resistance goes.
 
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