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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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sony kp53s25
tv has one vertical line at bottom of picture....replaced vertical ic
and checked associated components and still no luck..any ideas? thank-you in advance.....brian |
#2
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sony kp53s25
Are you actually getting a picture? Or are the CRTs black and you are
seeing this line by looking down into them? -- ========================== Jeff Stielau Shoreline Electronics Repair 344 East Main Street Clinton,CT 06413 860-399-1861 860-664-3535 (fax) ======================== "If you push something hard enough it will fall over." Fudd's First Law of Opposition - Sir Sidney Fudd "brian" wrote in message om... tv has one vertical line at bottom of picture....replaced vertical ic and checked associated components and still no luck..any ideas? thank-you in advance.....brian |
#3
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sony kp53s25
Perhaps you are confusing horizontal with vertical like so many do...
Vertical is up and down, horizontal is left to right or across. If you have a vertical line (up and down) your problem would be in the horizontal deflection, not the vertical. "brian" wrote in message om... tv has one vertical line at bottom of picture....replaced vertical ic and checked associated components and still no luck..any ideas? thank-you in advance.....brian |
#4
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sony kp53s25
If the voltages are not correct at the vertical output it is possible to
have a horizontal (left to right) line at either the top or bottom of the raster, of course the set will go into protect because vertical scan is not being realized. Confirm the presence of proper voltages at the vertical ic and check the caps in both the deflection and supply circuits. BTW in extreme cases, if the beam hits the neck of the crt, it can cause fracture of the tube envelope. "brian" wrote in message om... tv has one vertical line at bottom of picture....replaced vertical ic and checked associated components and still no luck..any ideas? thank-you in advance.....brian |
#6
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sony kp53s25
Subject: sony kp53s25
From: (brian) Date: 10/29/03 5:49 AM Eastern Standard set has nopicture i have to look into the crt to see line left to right You need to scope the vert yoke to see if you have deflection or not. Sonys of this era mute the video until the IK catches up. The only thing visible during this time is a line at the top of the target. From what you've posted so far, we don't know if it's a video or deflection problem. John Del Wolcott, CT "Nothing is so opportune for tyrants as a people tired of its liberty." Alan Keyes (remove S for email reply) |
#8
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sony kp53s25
Do a Google search for Sony AKB, Sony blanking video, etc for LOTS of
information. Sony uses the same blanking system no matter PTV or DTV. My gut tells me that if the sound goes up and down, and you see the AKB blanking lines on the face of the tube (no osd or video), you have either a bad tube or a problem in the AKB circuit. Or more remotely a problem with the hsync or vsync getting back to the jungle ic and system control. David (brian) wrote in message . com... (brian) wrote in message . com... (brian) wrote in message . com... tv has one vertical line at bottom of picture....replaced vertical ic and checked associated components and still no luck..any ideas? thank-you in advance.....brian set has nopicture i have to look into the crt to see line left to right one new thing i discovered is if i turn screen control up i have full vertical....(top to bottom) i just replaced ic 301 cxa1477as and now have vertical ,sound, but no video....justbright screen w/ retrace.......i think im making progress but now video has me stumped |
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