Question about Toshiba 19A26 19" TV

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Info to fix

I put this puppy away in the box after a year of use and it sat in heated storage for 12 years.
Took it out of the box and the picture only extended from the top to mid tube with the menus and channel displays scrunched up. After running for about 1/2 hour, the picture decends all the way to the bottom  but the menu is half out of sight.
I assume some electrolytic capacitor in the virtical control has dried out but I have no schematics and no clue where anything is. I hate to to discard the equipment if can be repaired.
Can anyone out there help?

Posted by mildmike3 on

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Anonymous

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Your right! Replace all the caps around/connected to, the vertical output IC. 100uf etc. Vertical IC is mounted on heat sink near yoke connector.

Posted on Nov 04, 2007

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1st things first, as I always say....

1. Check your soldering around the vertical section. Most sets have defects in thier soldering of the components under the board, with time. Especially true of RCA and Zenith sets, but all makes are not exempt! Again, check this first and fix as necessary.

2. Look for one or more electrolytic capacitors in the vertical section, maybe around 100uf 35v ,1uf 50v or a 220uf 35v or similar values. Change these, even if they look physically ok., observing the polarity of each. Most of the repairs I do involve these components. They fail with time and change value. Higher value caps , like 1000uf, 2200uf, etc., are usually not the reason for vertical troubles, just to note.

Further steps, if needed:

3. You might even have a shorted or open diode next to the vertical chip. It is usually black with a gray stripe on it. Be sure to replace it with the same polarity as the old one- the "stripe: denotes the cathode side of the diode. Do not get it backwards, (important!) - follow the "arrow" symbol on the board... you can check the diode with most multimeters. It should read in only one direction as a rule of thumb. If it's shorted, you'll get a reading in both directions, and if open, no reading of course. You can use most generic, 1 amp diodes (not zeners) to replace it, I found.

4. Your vertical chip itself may be bad, but you'll usually get a line straight across if it is. If after doing the above with no result, you may want to change it.

Good luck...

Oct 26, 2007 | Toshiba 19A26 19" TV

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