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Re: No vertical deflection Toshiba model #CF27H40, need...
If this is a CRT television, replace all electrolytic capacitors in the vertical circuit - this fixes 90% of all vertical deflection problems. The capacitors most likely t0 fail are low-cap, high-volt such as 3.3 uF at 50 volts, etc. Quicker and cheaper to replace them all, rather than tracing it down to the one bad part. Total cost if you do it yourself is about $15 tops, and make sure you install them correctly - electros have a plus and minus lead, and must not be installed backwards or you'll have serious blow-upage of the new parts. Before replacing the caps, however, go over all solder joints in the vertical section, reheat them and add a touch of fresh solder. You may end up not needing to replace anything.
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The problelm is a
defective vertical deflection system. Could be the amplifier, vertical
output driver or whole printed board that supports the vertical
deflection activity. It is considered to be a serious failure. The cost of repair will be around $200 to $300.
This denotes a problem with the vertical deflection circuit. This is more then likely the result of the vertical coupling capacitor failing. You will need the schematic diagram of the TV to find the capacitor in question. it is located between the vertical output stage and the vertical deflection winding of the yoke transformer. In addition check the continuity of the vertical winding of the yoke transformer this can cause the same problem. In any event the problem is that the vertical deflection signal is not getting to the yoke transformer or the yoke transformer is malfunctioning.
This symptom is characterized by a thin horizontal line in the middle of the screen. This symptom is caused by the absence of the deflection sawtooth current in the horizontal deflection coil.
The trouble is easily isolated by a continuity test and by checking the most likely defective components such as A)open vertical linearity compensation transformer, B) open capacitor and C) open horizontal deflection coil.
Be sure to decrease the brightness first before trouble-shooting if the line is very bright,as it burn the phosphor screen..
It sounds like a vertical deflection problem. You mentioned you had a white HORIZONTAL LINE in the middle of the screen. If this line runs from left to right across the screen it's in Verticla deflection. If it runs from top to bottom, it's in Horizontal deflection. I am assuming the problem is a Vertical deflaecion problem. The repairs necessary are most likley to replace the vertical capacitors or the verticla deflection chip.
NC Electronic Mills, Wyo USA
yes it can still be fixed! the pop sound you've heard maybe came from a blown capacitor in the vertical deflection circuits. this symptom, sometimes called the tube light effect, it is characterised by a bright thin horizontal line across the middle of the screen. this symptom is caused by a breakdown in the vertical deflection circuit. hence maybe the trouble maybe in the vertical oscillator, amplifier or output circuits. but if all i have said is not clear to you, better bring it to a qualified tv technician. good luck!