Question about iiyama Vision Master Pro 510 22" CRT Monitor

2 Answers

Horizontal scanning does not work

Horizontal scanning failed. All picture concetrated in the thin (about 8mm) column in the center of the screen. I already took out the back cover, looked inside. From the first sight there are now bloated capacitors, burned transistors or ICs, etc. Do you have any idea what might be gone? I can make pictures, read names of the parts, or check some signals with scope if you need it. Don't ask me to check how good is High Voltage with the scope, though ;-)

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  • Igor Chudakov Aug 07, 2006

    Thanks noone,
    Actually that problem has been solved by pressing on controller in the middle of the board. :-)

    However, recently I got another problem with the same monitor: the high voltage gone. I got a suggestion from another forum to change one diode in power supply (seems like it's common problem for these monitors.)

    Are there any thoughts on this problem?

  • doug76r Jan 14, 2008

    bright lightening flash in the middle of monitor-vertical

  • telemanic Mar 02, 2008

    iiyama vision master pro 510 . blows line output transistor and fuse in psu 28 volt supply, after replacing these components monitor runs ok. however horizontal output transistor runs very hot and eventually goes short circuit after approx 1/2 hour, I have checked horizontal output tuning capacitors, resistors, diodes scan coil correction pcb components etc. All supply voltages /waveforms appear to be correct according to the service manual, I haven't replaced the output transformer as when the monitor is running the pictures look good, (no distortion, foldover ,cramping or ew problems and the width is fine. The output transistor has been replaced with the same type and all the biasing components in the base drive circuit have been checked and are the correct value.please help as this monitor keeps bouncing back , this is the third time that I have replaced the transistor and fuse, the decoupling capacitors in the psu have been replaced and all the soldered joints in the line output stages have been cleaned and resoldered. Any suggestions greatly appreciated, I'm even considering calling it a day on this one and telling the customer to scrap it. Thanks in anticipation.

  • garibz Mar 20, 2008

    the horizontal button on the front of the monitor does not work at all.but vertical is ok.

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You have high voltage. Horizontal sweep is not working. Mostly we see shorted sweep transistor. Mike

Posted on Aug 06, 2006

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Man, i have the same problem, but with a ctr viewsonic monitor. all i can see is a line across the screen. That is a tipical problem of tv's, which i fixed very easily, but i cant fix this one. hope someone can help.

Posted on Aug 19, 2006

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1 Answer

No picture. Just a thin horizontal band of light running through the center of TV.


HI,
Your tv has problem with its vertical scanning side. vertical scanning output ic (integrated circuit ) may have some problem ( faulty or dry soldering in its leads). You can easily find out the vertical ic on your tv. there will be four wire coming from the coil which is fitted on the picture tube neck, of which 2 will goto horizontal scanning section and the remaining two will go to vertical scanning section. just follow the two thin wire (normally in color green and yellow ). it will goto a socket on the main board. follow the track on the board. it will lead u to vertical scanning section. check for any dry soldering, if not , replace the ic.
ok

Mar 07, 2011 | Mitsubishi CK-35308 35" TV

1 Answer

I have sony triniton tv when i was turn on there is horizontal line on the center of screen this problem was never happen before


HI,
ur tv has problem with its vertical scanning side. vertical scanning output ic (integrated circuit ) may have some problem ( faulty or dry soldering in its leads). u can easily find out the vertical ic on ur tv. there will be four wire coming from the coil which is fitted on the picture tube neck, of which 2 will goto horizontal scanning section and the remaining two will go to vertical scanning section. just follow the two thin wire (normally in color green and yellow ). it will goto a socket on the main board. follow the track on the board. it will lead u to vertical scanning section. check for any dry soldering, if not , replace the ic.
ok

Jan 04, 2011 | Sony KV-35S42 35" TV

1 Answer

There is a horizontal line in the mid


Hello

The vertical scan of your TV has failed. All picture tube type TVs have both horizontal and vertical scan sections to scan the picture on the secreen. When horizontal scan fails, you will see a vertical line at the middle of the screen, and if vertical scan fails, there will be a horizontal line through the middle of the screen. In your TV, the second stated has happened.
This may be due to an IC trouble or a voltage loss inside the printed circuit board of your TV. To rectify this fault you have to open your TV, and locate the vertical output section inside it. It is very easy to locate that section. There will be four wires goes from the deflection yoke; the coil fitted at the neck of the picture tube; out ot which, two will be thick and the other two will be thin. The thick wires are usually colour coded as red and blue. Colour coding may differ from set to set. Anyway you have to follow the tow thin wires, as they are carrying vertical scan signal to the yoke.
Following it, you will reach to a plug in point on the printed circuit board. Upside down the printed circuit board, and follow the track through which that wire connection goes, and finally you will reach to the vertical output section.
There may be transistors or IC used on that section. First check the voltage at the vertical output section. Voltage lose also may occur in this section. If it uses IC, check for any loose or bad solderings at the terminals of the IC. I advice you to resoder the suspected points by applying a little more solder, without shorting the terminals. In most cases this will solve the problem. If there is voltage, and there is no loose solderings and still the fault perists, replace the IC or transistors, whatever it may be, with same type and number.
If you want anymore asistance, fee free to contact me through Fixya. OK.

Dec 27, 2010 | Toshiba CF30F40 30" TV

1 Answer

Blank screen except for a single horizontal line through the middle of the screen.


Hello

Your TVs vertical swee sction has failed. All CRT based TVs have both vertical and horizontal sweep sections to sweep the picture both in vertical and horizontal direction to display it on the picture tube screen. This process is otherwise called as scanning. If vertical scan section fails, you will see a horizontal line at the middle of the screen and if horizontal scan fails, you will see a vertical line on the middle of the screen.
You have to open your TV to retify this fault, as the fault lies in the internal circuit board. Open it after disconnecting it from the mains wall socket, and locate the vertical output section inside. It is very easy to locate. On opening you can see a coil fitted on the neck of the picture tube, called deflection yoke, and there will be four wires from it goes to the main board. Out of which two of them will be thick, and the other twos will be thin. The thick wires are usually colour coded as red and blue. Just follow the two thin wires. You will reach to a plung in socket to which these four wires together connected. Turn upside down the circuit board, and follow the print track through the print side of the above said two thin wires connection goes. it will go to the vertical output section.
Before doing any thing, first look into the circut board for any loose or bad solderings are there. It is a common fault that this section have loose solderings on it, because most of the components will heat up while working. Repeated heating and cooling, make loose soderings to emerge.
Resolder all the suspected points, as loose solderings will be microscopic,a nd acnnot be detected very easly. We in the service field also will fist do this.
Usually vertical output section is composed of an IC related circuit. Solder all pins of that Ic first and feel the effect. If this does not help, desolder the IC out of the board, will be screwed on to a metal heatsink, go for the same type and number. Replacing the IC will solve your problem.
If you wants any more assistance, feel free to contact me through Fixya. OK.

Dec 09, 2010 | Toshiba 32A30 32" TV

1 Answer

Picture has been reduced to a thin line in center of set sound and remote functions still work


Hello
Your TVs vertical output section has the trouble. All TVs have both vertical and horizontal scanning sections, which scans the picuture on the secreen both vertically and horizontally, to get a picture frame. If horizontal scan fails, you will see a vertical line at the middle of the screen, and if vertical scan fails, there will be a horizontal line across the middle of the screen. Your TV has the second stated trouble. To get it rectified, you have to open your Tv.
Unplug your TV from mains socket and open it. Locate the vertical output section. It is so easy to locate. Your TVs picture tube neck id fitted a coil alongwith it, which is called the deflection yoke, and it will have four wire connections. Out of these four wires, two of them will be thick, usually red and blue in colour, and the other twos will be thin. Just follow the two thin wires, you will reach to a point that these four wires are plughed onto a pin connection, on the main printed circuit board.
Upside down the board, and trace the track to which these two thin wires goes, through the print side, will reach to the vertical output section.
Normally this section consists of an IC for this purpose, and can be screwed onto a metal heatsink, as it will get heated when it works. Before unsodering it , just look at the soldering points of this IC pins for any loose soldering points. Loose soldering are very difficult to locate, as thay will be very minute up to microns, so resolder all the pins of this Ic, by applying a little more solder, and see the effect. Sometimes this will resolve the problem. If not go tho the main input voltage that goes to Ic pin. If it is not there, check out the reason. If it is there and still vertcal scanning does not occur, resolder out the IC from the circuit board, and go for a same type and number.
If you wants anymore asistance, feel free to contact me through Fixya. OK.

Dec 08, 2010 | Insignia NS-RTV32 32" TV

1 Answer

H LINE


Hello
Your TVs vertical sweep, otherwise wertical scan, output section has got some trouble with it. there are horizontal and vertical sweep sections there for every picture tube based TVs. If horizontal sweep section fails, you will see a vertical line at the center of the screen, and if vertical sweep fails you will see a horizontal bright line across the middle of the screen.

To locate the faulty section and to get it repaired, you have to open your Tv. Open it, after detaching it from wall power socket. Locate the vertical section. It is easy to locate. There will be four wires going to the main board from the deflection yoke, fitted on the neck of the picture tube. Amoung them, two will be thick, usually colured as red and blue, and the other two will be thin. Follow the two thin wires, and you can see it to be plughed into a socket on the main board. Just put the board upside down, and follow the track of that two thin wires through the printed circuit boar. You will reach to the vertical outpuut section. Usually these sections are provided to work with an Integrated Circuit [IC]. screwed onto a metal heatsink.
Before doing any thing, just look onto the solderings of legs of that Ic for any loose contact. As it is very difficult to locate the loosec contacts, just resolder all the pin soldering at that IC by applying a little more solder. and check if the problem is rectified. As these ICs will heat up while working, it is natural to get its leg solderting loose after some time.
If it doesn't help. check the voltage input to the vertical IC said above. If there is voltage, and still it doest help, desolder it out from the board and go for a same type and number. Replacing the Ic will solve your problem.
If you wants any more assistance, feel free to contact me through Fixya. Ok

Nov 30, 2010 | Sony FD Trinitron WEGA KV-32FS120 32" TV

1 Answer

I have a 13 year old Mitsubishi tv which worked perfectly up until today. I am getting a thin blue horizontal line through the center of my tv screen. I have no picture but I do have sound. Can you advise...


The vertical scan module has failed. The tv is easily fixable, but not by you, you will have to call a technician to replace/unsolder some parts. It will cost you around $150 ($25 the parts plus the labor) so must decide if the tv is worth that.

Jul 01, 2010 | Televison & Video

1 Answer

PICTURE IS ONLY FINE HORIZONTAL LINE


Hi there,it looks as if you have a frame collaps,this is the first time i have ever heard of this on an LCD tv,i take it that there is no picture at all only a thin line.

Dec 23, 2007 | Sony BRAVIA KDL-40S2000 40 in. LCD HDTV

1 Answer

No picture


a bright thin line in centre is called horizontal line. first of all do not keep tv on unless it is rectified. BUT If you want to put on tv keep brightness minimum to protect your screen for any demage. now solution your problem is in vertical section. 1 check vertical supply. 2 check parts in vertical section or loose contact. 3 yoke connrctor loose 4 ic defective It is not serious problem can be rectified easily

Sep 19, 2007 | Toshiba 32DF46 32" TV

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