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Don't worry too much about voltages within 20% of correct (such as the pin 6 reading) those should be within tolerance.
Which stage is the 12AU7 in? A horizontal line on the screen is a symptom of Vertical deflection failure...So you should be scrutinizing the voltages and components in and around the the Vertical multivibrator/oscillator, output tubes. Here is a quick test that can clear the vertical deflection transformer and yoke (the most rare/costly parts). If you have a variac disconnect the primary of the vertical output transformer, and connect it to the variac. With the set on slowly crank up the output voltage of the variac, and if that line expands vertically before you hit max output, then your yoke and output transformer are functional....If the line don't expand disconnect the vertical winding of the yoke connect it to the variac, and repeat.
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Tom C. Zenith: The quality stays in EVEN after the name falls off! What I want. --> http://www.videokarma.org/showpost.p...62&postcount=4 |
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20V..... Anywhere near max output with only the unit's fuse could put 2 - 3 or more amps into it.... Cooking it for sure I would think.... Have you actually done this....? At the 20V I would be looking for just a small deflection, not full screen..... ------------- Quote:
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Yes you can call me "Squirrel boy" Last edited by Username1; 04-09-2015 at 06:10 PM. |
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Quote:
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Tom C. Zenith: The quality stays in EVEN after the name falls off! What I want. --> http://www.videokarma.org/showpost.p...62&postcount=4 |
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sylvania deflection loss
The 12AU7 I am referring to is the horz oc and horz discharge section, I had thought the voltage being 100v higher on that pin was causing a problem elsewhere in the set, I will check the vertical section next. I know the Vertical output tube pins read correct voltage.
Last edited by sylvania; 04-09-2015 at 09:02 PM. Reason: more information |
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