Part Number: TT2222 Function: TT2222 Transitor for TV, High Voltage Color Display Horizontal Deflection Output, Color TV Horizontal Deflection Output Applications Manufacturers: TT2222 Datasheet TT2222 transistor equivalent ST2001HI: 1500 / 800V, 10A, 55W, tf = 0,2us KSD5703: 1500 / 800V, 10A, 70W, tf = 0,1us TT2202: 1500 / 800V, 10A, 30W, tf = 0,3us TT2140: 1500 / 800V, 6A, 20W, tf = 0,3us Description:. High speed. High. High reliability (Adoption of HVP process). Adoption of MBIT process.
On-chip damper diode.
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Hello Before replacing an other one, replace the freewheeling capacitor, the capcitor fitted between the collector of the 2222 and earth; usually of a value of 3500pf 2000VDC, some times this value may differ from set to set. If this capacitor has opened of developed in value, the result will be the failure of the horizontal output transistor, at switch ON itself. The second reason is the short in horizontal yoke windings. Even one winding get shorted, it will cause to a heavy load flyback transormer which in turn to 2222 failure. The last reason for this fault is defective Line Output Transformer itsef. Check these three. Before proceeding, desolder out the horizontal output transistor 2222 fro circuit, and measure the frequency at the collector point of horizontal driver transistor.
It should be around 15625HZ may differ a little, with no signal. If this frequency is found higher than normal, The main IC jungle should be suspected.
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Anyway, go forward after checking this frequency. Posted on Jun 10, 2011. Check and replace damaged component/s at its horizontal scan output section circuit. Check the LOT (Line Output Transformer) too for damage. Replace the horizontal scan output transistor. Check the input voltage to LOT. If the voltage is absent check the feeder resistor; if any.
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If you wish to get some details; check the site linked here. Pull up older posts.
Type in this key phrase ' my service table today ' in the search box at the top right of the the home page, to get gathered some pages which has the details of practical experiences of the author of that site. The search result might display about 20 Nos of related posts. Press the 'All posts' at the bottom of the list, then you can select them one by one. Feb 17, 2017. Hello Check its horizontal output transistor for short circuit.
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It is a common fault to all type of CRT based TVs, and show this type of fault. If it is found shorted collector to emitter, the LOT should also be checkd for winding short internal. Normally; LOT cannot be checked with normal measuring instruments. If LOT has internal winding short, the horizontal output transistor will get overheated and finally shorted.
Replace the horizontal output transistor first, and check whether it heats up ubnormally within seconds after switch ON the Tv. If it heats up so, make sure that the LOT is defective, and it should also be replaced. Feb 28, 2012.
Hello You just replace the capacitor fitted very near to the horizontal output transistor,freewheeling capacitor, there may be one or two of them, whcih comes to a value of 3900pf to 6700pf 2000V or so. It is connected to the negative rail and the collector of the horizontal output transitor. If it gets opened, or its value gets reduced, this fault will occur. If so the transistor you replace will get shorted as you swich on the power to TV.
The second one is deflection yoke short. If so the transistor said above will overheat within seconds. Even a single winding inside the horizontal deflection yoke shors, it puts a tremendous load to flyback transformer, which in turn effects the transistor.
Ipc 2222 Pdf Design Standard
After replacing the above said capacitor, you do one thing to make sure about whether there is a short inside the yoke or not. It cannot be measured by normal methods. Fore that, unplug the base card from picture tube and place it somewhere near without getting any of its contacts to other parts inside your TV.
This time only the EHT chord will be connected to picture tube. Unplug the horizontal yoke connection from main board. Switch on the tv, and wait for some time, say at about 10 seconds, and check whether the transistor gets overheated or not If it does overheats now also, the winding or EHT retifier diodes inside your flyback transformer has some trouble, and it should be replaced with same type and number.
Transistor Tt 2222 Datasheet Pdf
Bubble trouble fish game for windows. If it does not overheats now, the deflection yoke's winding have some short in it. NB: Never connect the TV with base card is in postion while deflection yoke connection is isolated. Keep it unpluged.
Oct 27, 2010.
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