5/30/2023 0 Comments Transistor TT2222CRT may get damaged, with a black burned spot inside the center of the screen. the T2222 is a silicon NPN transistor preferred for use in general purpose applications: Source: KST2222: Picture: -advanced information for T2222: OEM: Samsung Electronics CO. NOTE: Never switch on the set while unpluging the deflection yoke connection plug from the circuit board, without dismandling the CRT base board. Till the transistor overheats, suspect the LOT. 2N2222 Transistor Pinout, Equivalent, Specs & Datasheet. If it doesn't overheat, suspect the deflection yoke for shorted turns of winding inside it. See whether the transistor overheats now. pull out the CRT base board out of the neck of the picture tube, place it where it doesn't get short circuited, and unplug the deflection yoke connection from the main board, and switch on the set. You can suspect the deflection yoke also for shorted winding. If it doesn't overheat, you can remove it later. You just put a small heatsink to it and check. Usually samsung sets use no heatsink for the horizontal output transistor. Replace the yoke return capacitor, 0.33uf or so also. You just replace the freewheeling capacitor, normally come up to a value of 5600pf 2000V or so, connected to the collector of the horizontal output transistor, fitted very close to the collector lead.
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