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NO HORIZONTAL DEFLECTION

I have just bought a Samsung 995 DF monitor it is(second hand), there is vertical, but NO HORIZONTAL SCAN.i can increase the brightness so I have ruled out the flyback transformer.CAN YOU HELP ME. I HAVE NO SCHEMATIC DIAGRAM. The horizontal output transistor has paint or something that prevents me from seeing the type number .Thank you

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Laziness is a curse, I had to dig out my old Oscilloscope, there is nothing better than waveform tracing. Thank you for the followup.

Posted on Feb 01, 2010

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TV has a great picture but wont "hold it". Keeps going to a single flat horizontal line across the middle of the screen. Tapping on side of TV used to bring it back but now, nothing. Just a line.


Vertical scan output section circuit fault. Absence of vertical scan causes the single horizontal line on screen. Horizontal scan output section is OK. Contact any service technician to troubleshoot the vertical scan output section circuit. If you wish to get some details; check the site linked here. Pull up older posts.Surf the site with patience.http://electronicshelponline.blogspot.com/
Horizontal line fault to CRT based TVs are given.

Oct 06, 2014 | Televison & Video

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Explain how the monitor buttons work


Monitor Icon Description of icon function moncont.gif Power - Turns the monitor on or off.
Brightness - Using this button or wheel the user can increase and decrease the brightness on the screen.
Contrast - Using this button or wheel can increase and decrease the amount of contrast on the screen.
Horizontal Size - Allows for the picture on the screen to be stretched to the horizontal edge of the monitor.
Vertical Size - Allows the picture on the screen to be stretched to the vertical edges of the monitor.
Horizontal Position - Allows the picture to move moved horizontally, once in the center the user can then use the Horizontal size to stretch it to have an equal amount of black border on each side.
Vertical Position - Like the Horizontal Position, using this button or wheel the user can move the picture up or down to center the picture more appropriately.
Full Screen - Sets monitor to full screen.
Degauss - This button will degauss the CRT, restoring possible color impurities. After this button has been pressed the degaussing circuit will be activated and then deactivated after a few seconds. Pressing and holding this button for a few seconds may cause your computer monitor to reset all data.
Corner and Trapezoid Correction - Using this button or wheel the user can either round the edges of the picture or move the picture inward like an hour glass or outwards.
Vertical Linearity - Sets the width of the vertical lines.
Moire - Removes or reduces the Moire effect, if any.
OSD Controls - If the monitor contains OSD controls, allows for the OSD menus to be adjusted.
Power Management - Allows the user to define the power management settings through the monitor itself and not the software.
Monitor Status - Displays the current monitor settings such as refresh rate and other settings.
Language - Sets the language on the monitor.

Aug 16, 2014 | Computers & Internet

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My crt acer ac512 monitar only centre line view,c"not full view why?


there are several reasons why picture of crt monitors did not display good picture. if your monitor had horizontal line at the center of the screen?...the faulty is in the vertical deflection, check the vertical oscillator also the fusible resistors & capacitors around that section. if there had vertical line at the center of the screen?..check the horizontal deflection, horizontal output transistor also check the YOKE.

Jul 31, 2014 | Acer Computers & Internet

1 Answer

In 2004 I bought a monitor Hansol 930 D model, (model no.D19BL, s/n A23490411020263) Since 2011, horizontal image began to narrow, now horizontal image H-size is 210 mm. vertical image size is ...


The horizontal deflection coil is shorted. There is no way to fix that, the entire tube would have to be replaced and that would cost as much as a new monitor.
Just buy a second-hand LCD monitor from here
http://www.diabloscomputer.ro/monitoare-second-hand-fujitsu-siemens-p19-2
Asta l-am luat eu si are o imagine excelenta.

Jul 01, 2011 | Hansol Europe 930D 19" CRT Monitor

2 Answers

H line problem


I think you are describing 'no vertical deflection.' If all you have on the screen is a single horizontal line, the vertical deflection circuit (or IC) has died. Unless you have service documentation on hand, I can't give a part number to replace but this is typically not an expensive failure and if the set was OK before, it is worth having repaired.

Jul 05, 2009 | Sansui 27" TV

6 Answers

Monitor problem


Hi,

Appreciate the "Ask Me".

I am assuming that you have more than just familiarity with electronic components and circuitry, the use of a DVM and a soldering iron. Further, that you have access to a service manual.

Width problem is basically insufficient horizontal deflection, then analysis would have to be in the horizontal section. Areas to initially focus on:
  1. 12V line and pin 29 of IC401;
  2. 110 V peak to peak at collector of Q403, if yes check Q 402 & 404 as well as T401;
  3. other components that affect the horizontal size are:
  • IC201
  • Q 405, 406, 407 & 408;
  • D409
  • L401
Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards. Thank you for using FixYa.

Aug 06, 2008 | Samsung SyncMaster 753S 17" CRT Monitor

1 Answer

Jvc av-29ts2ek


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.
Good Luck
Ed
NC Electronic Mills, Wyo USA

Jan 05, 2008 | JVC TM-2703SU 27" TV

2 Answers

Horizontal lines


sometimes I encounter vertical lines below..... when i tap the sides it clears for a time being  but after a few moment again appears

Dec 06, 2007 | AOC 19LVWK LCD Monitor

1 Answer

Dell monitor problem


Your monitor uses one transistor for High Voltage and one for Horizontal deflection. (Many use just one transistor for HV and Deflection). The transistor you removed is the deflection transistor.

Jan 29, 2007 | Dell 17" Monitor

1 Answer

Samsung syncmaster 204b


Yes. There is no vertical deflection. The circuit that controls vertical deflection is bad. This is an easy fix for a TV tech. Take it to the TV repair shop.

Dec 14, 2006 | Samsung SyncMaster 204B 20.1" LCD Monitor

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