Curtis Mathes TV CM27001S turns on, then turns off

Jun 05, 2007 1 Replies
B

Hi,



I have a Curtis Mathes TV model CM27001S (mfg. 11/01) in my shop (no S.M.). A power surge due to a storm (customer has a surge protector) might have caused this problem?



The TV will turn on. There is around 27KV (measured) for the CRT. There is vertical deflection and good sound, but just as the picture begins to show (just barely), the TV turns off. Note: This happens every time you turn on the TV.



Did you have one of these sets with the same symptom? What caused it?



Thanks in advance, Brad



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B

Hi,

Note: I do not have S.M. and TV made by Samsung.

Here is more information that should narrow the problem down to a specific area. Note: Regulated B+ is 130V (measured).

I unplugged the CRT pcb and the TV stays on. I plugged it back onto the CRT and turn "screen" (FBT) to minimum. I turn on the TV and it says on, but when I turn up the "screen" slowly, just as the picture begins to show, TV turns off. Note: I tested the CRT and it is AOK. Also note: If C508 (screen grid circuit) was shorting, it would also short with CRT board unplugged. Thanks in advance, Brad

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