Could it be the transformer?īy the way, there's a 5v around the uC and the IR-Sensor, but there's a whole section that has no voltage whatsoever, of course when the transformer was mounted on board. Now the short has gone, the STRS6307 doesn't get hot after several minutes. Even removing the whole 9-pin regulator didn't help, until I removed the transformer, T601. Voltages around the photocoupler, regulator, and Q601, Q603 are not the correct ones as it seems in the schematic. Removed the cap but the short still there. The posistor gets very hot, too, but I believe it's normal.Īfter spending several hours, I found a short across the C628 cap. After keeping the power on for few minutes, the STRS6307 has become very hot. I removed the power cord, disconnected all cables, removed the flyback suction cup from the tube and covered it and continued testing with only the power cable connected to the main board.Īt this stage, the main 300v capacitor was not holding any charge after turning the power off, and it is the case for the 160v cap in the secondary section. But as far as I remember, when tested with all cables connected, I spotted some sparks around the posistor area, between the posistor and the big square white resistor. Replaced it with a new one, but the TV still refuses to work. I removed it from circuit and, yep it was shorted out. When I got to the horizontal deflection area, I found the whole part shorted out (2SD1878). Some were tested in circuit, and others were removed from circuit for test. No capacitor is found to be bulged, checked almost all diodes/caps for short or leakage, but nothing yet. Well, the main board has turned very dark under the large resistors at the power supply area, but the fuse is still intact. I tested the set after cleaning, of course, it's still dead. I started off by cleaning the entire set with a hoover and all circuit boards with a special spray so I can see what's going on under all that dust. The schematics file (scan) is attached, and here is a link for a service manual for a similar model, but this one is the original PDF so it's much clearer than the first one: Just like if it was an infection affected both sets somehow?!! :-Dīecause they both had the same issue, and the KV-2165MT looks much better, I decided to start with that one first. Now, the funny thing is, when we tested the other set (KV-2165MT) which looks much better, it has exactly the same symptom. Red LED blinks as I press any button in the front panel, and it gives an indication when the max/min volume reached when I play with volume buttons. No picture, no audio, only the red power LED turns on for couple of seconds then goes off everytime I turn it on, with a faint hissing or clicking sound coming out of its speakers as it turns off. ![]() I tried to remove the cable for few days again, but that didn't work. However, the following day, the TV refused to work at all. I removed the power cord and kept it unplugged for about two days and when tested it later on, the TV started up normally. Later, the TV started to take 5~10 mins to start up, and some times more. Since we moved here, it's been working flawlessly for about few weeks, and its picture was really nice. It seems the older one (KV-2162M9) was the last one standing before we move here. ![]() They were both left off for so long in a relatively humid area (home is only 2 miles from beach).
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