Tip & How-To about Cell Phones

China touch screen repair solution

Touch Screen IC 4182A and MT6301 same. See X- X+ Y+ Y- reference my picture jumper.

Touch Screen use of 4-wire resistance screen, four lines are: X1, X2, Y1, Y2
X1, X2 in the horizontal direction for a change in the resistance, Y1, Y2 for the longitudinal resistivity.
How do you know which line is a two x1 x2 y1 y2? Touch panel along the four lines above are facing their own look at the screen from top to bottom in the line is about on both sides of the x1 x2 is y1 y2. Established phone touch screens measuring four points of the voltage. Two 2.7V and two 0v . two voltage are measured after boot. 2.7 v is y. X is not the voltage.
After corresponding with xy can generally be connected. If the touch panel screen and click position opposite or reverse. Swap contrast x-y reversed.

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what circumstance does the screen will be a blue screen of Digiprog 3 ?


there are mainly 4 reasons
1). Digiprog3 can't connect with the computer unless it needs to update, also can't run with the original software.
2). If you update incorrectly, DP3 will blue screen. (When we have newest update software, you could update DP3, if we haven't newest software, do not update).
3). Crashed during shipping
4). The voltage is unstable when Digiprog3 (Item No. SM33) is opened. (Note: please read carefully the manual before use DP3.)

3 steps to solve it
Step 1. Take down the fly cable between X1 and C30 in the red box.
(see following picture)

Step 2: Take down the IC on X1, then replace with a new IC. ( the IC pits should be compatible with the red point on the picture)

Step 3: Solder the fly cable (that has been taken out in first step) back to its original position.

More Technical Services: http://www.careucar.com/search/?q=digiprog+3

Digiprog 3 has been updated to the newest version V4.94.

Jan 29, 2013 | Ankaka.com Car OBD-II Diagnostics Tool...

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

3 Answers

Touch screen is not responding on my x1


ur TOUCH PANEL IS FAULTY kindly go for warranty claim or tell me i can give u link for the out of warranty replacements


Mar 16, 2009 | Sony Ericsson XPERIA X1 Smartphone

1 Answer

Toshiba 52WM48 - Dark line across top of screen about 4 inches


replace the vertical ic, LA 7833 and four capacitors near it, i encountered this last two days.change the parts and it ok now.
cost of this parts is about $20.00

Jan 22, 2009 | Toshiba 42H83 42" Rear Projection...

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