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NotTaR of Television Sets :
Copyright ©
1994-2007, Samuel M. Goldwasser. All Rights Reserved. Reproduction of this document in whole or in part is permitted if both of the following conditions are satisfied: 1. This notice is included in its entirety at the beginning. 2. There is no charge except to cover the costs of copying.
I may be contacted via the Sci.Electronics.Repair FAQ (www.repairfaq.org) Email Links Page.
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Index
| Single Horizontal Line >>
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CAUTION: To prevent damage to the CRT phosphors, immediately turn down the
brightness so the line is just barely visible. If the user controls do not
have enough range, you will have to locate and adjust the master brightness or
screen/G2 pots.
Since you have high voltage, the horizontal deflection circuits are almost
certainly working (unless there is a separate high voltage power supply -
almost unheard of in modern TVs and very uncommon in all but the most
expensive monitors).
Check for bad solder connections between the main board and the deflection
yoke. Could also be a bad horizontal coil in the yoke, linearity coil, etc.
There is not that much to go bad based on these symptoms assuming the high
voltage and the horizontal deflection use the same flyback. It is almost
certainly not an IC or transistor that is bad.