 Posted: Tue Jan 30, 2007 11:40 pm Post subject: |
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| You should know better, for the people that don't know , in the future that you are repairing the vertical with a line in the midle of the screen, you should always turn the brightness all the way down ,so you don't burn the crt. | |
| Posted: Tue Jan 30, 2007 8:49 pm Post subject: |
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| 15V for a power supply it is not enough, probably “IC” defect, or the condenser for 24V(28V) has dried up.
Probably horisontal voltage it not enough , therefore vertical supply it is too little. |
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| Posted: Sun Jan 28, 2007 5:41 pm Post subject: |
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| Thought as much.
cheers minnie. |
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| Posted: Sun Jan 28, 2007 5:24 pm Post subject: |
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Only way to get rid of burn in is replace the crt's that are effected. Not cost effective. Glad you got it!  |
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| Posted: Sun Jan 28, 2007 5:08 pm Post subject: |
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| The feed to the IC was missing. I'm sure when i checked it last, there was voltage. Anyway, traced back to a 5a board fuse on the power board.
Replaced 5a fuse and all is okay now apart from the screen burn from where the line was. At least its working. Anyone know how to get rid of or hide screen burn! Just the green. Cheers, Nik. P.S. thanks to MINNIE + R.J. - GAST for your help. For anyone else with this problem - LA7833 needs the following voltages at these pins: Pin 1. -15v Pin 6. +15v If there is no voltage at Pin 6, check board fuse Z858. It is a 5a board fuse that is usually white or possibly orange (looks a little like a resistor) Check the continuity across the fuse. If no continuity soder in a new one![/b][/u] |
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| Posted: Fri Jan 26, 2007 12:09 am Post subject: |
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| I don't but, off the flyback should be some diodes. The out put of the flyback should go thru a resistor that will open then to the diode to the vertical IC. Just back step from the vert ic to the diode to the resistor. If I can find a print I'll get more specific. | |
| Posted: Thu Jan 25, 2007 10:24 pm Post subject: |
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| Thanks R.J. - gast.
I know what your saying. Does anyone have a schematic for this TV so I can see what's supposed to be what? Thanks, Nik. P.s. R.J. - gast Your english is pretty good. |
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| Posted: Thu Jan 25, 2007 8:43 pm Post subject: |
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| For the beginning check up a voltage of a feed on a microcircuit if it is absent or too low, check up ≈ 1-3 Ω resistors in area of the horisontal transformer.
I'm sorry for my laguage.  |
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| Posted: Thu Jan 25, 2007 7:26 pm Post subject: Nope not the IC |
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  changed it but it's not the IC.
I cant check the caps at the min. Any other ideas. Its just a solid horisontal bar of light across the middle of a black screen. I can adjust the brightness and focus of each color on the front of the set but that's it. |
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| Posted: Wed Jan 24, 2007 6:59 pm Post subject: |
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| Thanks minnie. I have a replacement IC on its way. I'll Check the caps when i get the IC as my Multimeters battery has ran flat (doh)
I'll get back as soon as I have fitted the IC. Thanks again. |
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