Question about Sylvania SRT2232S 32" TV
Model is Actually a SRT2232X 32" TV (CRT). (I think the "X" is just a chassis color option). I am having a problem similar to other TV's. Last night there was a loud pop, then it shut off. I tried to turn it on again, and got an arcing (clicking) sound with a bright vertical signal centered on the CRT. It looked like an audio wave form, but running top to bottem, possibly retrace? Today, same symptoms. I purchased PDF Schematic online last night. Main Board = BL6509F01012-1 I discharged the CRT, removed main board and visually inspected it for obvious damage. Only R552 has slight discoloration on the PCB. Q552 may be damaged (not sure). I suspect Q571 (H-Out), Q572 (H-Drive), Q551 and/or Q552 (H-Control). Anyone had a similar problem with this PCB and fixed it?
Hello kd6aaj, You are on the right track, a vertical line usually means that you lost horizontal deflection which is supplied by the horizontal/High voltage section.The thing that puzzles me is that you did not lose high voltage. Let me explain. In modern TVs the horizontal section uses scan rectification or a process similar to a switching power supply to convert a lower voltage tapped off of the hoizontal/HV section to provide B+ for the rest of the television. So if you lose your Horizontal voltage you lose your B+ also. So you will never see the vertical line because you low voltage power supply if off also. Now I think your Q571 (H-Out), Q572 (H-Drive), Q551 and/or Q552 (H-Control) might be good. However check them anyway. I would also advise you to check your yoke transformer for an open or shorted winding. This would cause you to lose deflection without losing high voltage. You are definatly in the right section just add the deflection section to your scope of troubleshooting.
Posted on Sep 10, 2007
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