CTC 5 Low high voltage

[oldtvsandtoy]

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[oldtvsandtoy]

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[radiotron]

Originally Posted by oldtvsandtoy

ok here is where I stand right now. I pulled the shunt reg cap off the 6BK4 and disconnect the HV anode wire to the CRT Still only 9k. I then put the chassis in my other ctc5 and the same thing. Only see 4 fuses, one being a piece of wire. All good. Flyback is not getting hot. How much can I check with the chassis out of the set?

do you think the yoke could have anything to do with it?
OR a break in the board, cracked solder etc.?

[oldtvsandtoy]

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[radiotron]

Originally Posted by oldtvsandtoy

yoke no, it was in two sets. Crack in the board? Dont know yet

if it is its proboby right under the hv cage i would look at all the retrace lines around there then try that

[DaveWM]

best way to trouble shoot HV would be to start with voltage readings on the horz out tube. the 5 has a 82 ohm resistor in the cathode circuit, and pulls cathode current thru the static converge pots. Get a resistance reading on the cathode pin of the tube socket and I will compare one of mine (or if you have a SAMs see if there is a resistance chart you can check). besides drive issues (which I doubt you have if the fly is not getting hot) You should check the screen voltage and with the plate lead disconnected and the tube pulled, check the Hor out plate cap lead and see if you have full B+ there. You did say you subbed known good tubes for horz out/damper/shunt/focus?

[oldtvsandtoy]

aaa

[oldtvsandtoy]

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