I need a part number for the TL120, I ordered the Thompsons manual and it is difficult to read and it does not match the circuit board I have. We started with only one green light and changed out the flyback. Now we have three blinks and cannot find the part number for the TL120 HELP
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Re: D52W20 TL120 transistor
Is the TL120 does it only have 2 leads? I will look this up when i get to my shop, also the SSB board can be defective causing no high voltage be sure to recheck all ribbion connectors second ribbon connector on fbt board if not in right set will not come on.
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If you have to ask, its best that you let a trained tech do it. The horz. transistor controls the H/V -flyback basically a switch for high voltages. when it fails you get no power up. Julio firstname.lastname@example.org It can be very dangerous to work with.
First you need to read the supply voltages to the STK's. Black things, size of 2 match books on a big heatsink. Sounds like your supply voltage is low, could be a bad STICK STK. usyually stk 130-20 or 150, etc..
ok first question. I assume your a tech. YOU could change geometry settings ... which ones ... i have had a similar problem before does the horizontal amplitude work... will piture go in or out, this is a ew correction problem that looks like convergence. the main cause of this is DL032,DL030, and CL032....sometimes the ew buffer tl120. you then might have to go and reconverge the set good luck
the d52w20 rca chasis itc222 can be difficult to troubleshoot sometimes. there a few things you can assume at this stage. ONe it is NOT the fuse. The processor in this set is seeing a voltage or saftey shutdown issue. and is shuting the set down for saftey. THis is where the troubleshooting begins. High voltage or overcurrent conditions are generely the problem. \technicians have speceil computer diagnostic equipment that can read error codes in the processor. much like in a car. but without it yo0u pretty much have to check things like horizontal ouput transitor.