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Vertical rolling but 200k preset is ok - Televison & Video

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What is the brand name and model number to your TV. Check its synchronization serperator circuit. Check and replace the vertical scan output IC. 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/

Posted on Apr 09, 2015

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Posted on Jan 02, 2017

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Yeah I have a Sylvania model # SP A2751 106. It is a old **** tube tv. When I go to hook up the the dvd player and switch it to vcr/aux the picture rolls in bars upwards. Its not the dvd player tried it on...


There should be a preset resistor on circuit board of old CRT based TVs, designated as vertical rolling adjust. Try to locate it and adjust a little till rolling stops, while playing the DVD. The set will be live during this process, so be careful. If you are not familiar with electronics, do not attempt to repair. Whether you suffer fatal electrical shock. Instead, contact any experienced service technician, or the nearest service center.

Apr 25, 2013 | Televison & Video

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Magnet from speaker caused white lines at the top of screen on 27af45


Hello
The faut to your TV is with its vertical output section circuits. Vertcal lenearity may have changed duse to defect of some electrolytic capacitors used at that section. If you have enough knowledge in electronics and have experience ins tracing the circuit, just open your TV and locate the vertical output section. The section to your tV is built around and IC [la78041]. This IC will be screwed on to a metal heatsink to radiate heat from it while it works.
Replace the capacitors [C407, C406,C409 & C413]. Adjust the preset resistor [VR401-1], a little bit. It is the vertical position adjustment preset.
If you want to get your TVs repair details, which includes its schematic diagram, printed circuit board and component placement details, adjsutments to be done after repair etc: you have to purchase one among my Toshiba servies advertised on Fixya. I can't send any PDF files by this window. OK.

Jan 04, 2012 | Toshiba 27AF45 27" TV

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We have a Triton Minimax 200 heater that has a pilot light, but can't get the burners to light. We have checked all the wiring and everything looks good. What else could be caqusing it not to work?


This will be in the safty circut. (on off, thermostat, pre switch, high limits, roll out switch,) Most often the roll out sw. a small piece of wire covered in a black sleeve as the wire runs along the bottom of the cabnet face just above the burners. This a switch cased in wax and if the fire rolls out the wax meltd and the heater shuts down If the blach cover is loose then it is probally OK. If it is shrunk tight on the wire it has probally gone bad. If so you need to find why the fire is rolling out before you replace it or it will just go bad again.
The other big one will be water pressure often easly fixed by cleaning baskets or the filter. If your pressure is high or low on the filter this will be the place to look. good luck.

Sep 03, 2010 | Pentair 200k Minimax Ch Ng Mv Heater

1 Answer

Vertical roll


I get Vertical roll on my Apex AD1000 DVD player and need a schematic. I don't know where to get a schematic but I have the necessary test equipment to troubleshoot the problem. Do you know where to get a schematic or know what causes the vertical roll problem?

Solution:

Program the setup menu screen to NTSC instead of "PAL" or "Auto"

Oct 05, 2008 | Apex Digital AD-1110W DVD Player

2 Answers

I have a 1983 popeye arcade machine. the circut board that controls the vert hold for the monitor has 4 knobs for vert., sound, horiz., and bright. thevert. hold knob is busted off and the screen has...


VR353 is a 200k pot that feeds directly in to the vertical oscillation input of the chip on the main board at connection B1. If this pot is broken, you must replace the pot in order to get any vertical oscillation at all.

Sep 10, 2008 | X-Gaming X-Arcade PC Joystick (XGMPC)

2 Answers

Tv roll


Are you sure the roll isnt Vertical? as if it is then all you need to do is adjust the VERTICAL HOLD PRESET POT which should be located on the PCB somewhere, its very unusual for TV.S to roll horizontally as then the picture just goes out of sync. and you would not see a picture at all. When you find the pot turn it ( with a small screw driver) slowly until the rolling stops, if it does not stop then you have a faulty component in the vert. sync. circuitry.

Feb 04, 2008 | Televison & Video

1 Answer

Tv problem


generally buttons are located at front only. but if it is not there then it will be inside in the shape of small variable res. called preset. vertical hold button will be near vert.section &horz hold near h/ section.

Sep 30, 2007 | JVC AV-27850 27" TV

3 Answers

Horizontal line in my TV.


"Guest" obviously has no idea what he is talking about. There is no such thing as "frame section" and if the vertical IC, ramp generator or vertical hold circuits were bad, you would have no vertical at all. If you mean that there are thin white lines at the top 3 inches of the picture, and the top of the picture seems folded back on itself, it means that the pump-up capacitor is going bad in the vertical output circuit. This is a very easy thing to correct but should be done by a qualified tech.

Sep 01, 2007 | Televison & Video

1 Answer

Vertical rolling of picture


If the picture rolls while both on cable as well as when you playback a tape or DVD, it could be caused by a bad filter capacitor in the power supply or vertical deflection circuits. If it only rolls while trying to view a picture from a cable/satellite box, then that component is likely at fault.

Aug 20, 2007 | Hitachi 60EX01B 60" Rear Projection...

1 Answer

PROBLEMS WITH VERTICAL ROLL


That is not a vertical roll from side to side, this is a horizontal rolling. if the vertical had a roll it would be going from top to bottom. This is most likely a coupling between the horizontal sync circuit and the sync separator circuit. Good Luck

Jun 28, 2007 | Sony KP-53S65 53" Rear Projection...

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