Anticipation Damage to the IXB855WJZZ

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Repeatedly encountered damage to IXB855WJZZ (DUNTKD746WE), eventually it bought in SC, installed, then paid ..............The problem is why are so damaged "that" her, then if broken, why not dare to be alone, PQ09RDA1 also went along. Damage suffered by the IXB also impressive half-half, not short-circuit VCC / VDDnya as experienced by its predecessor (IX3368 and IX3410), but short-circuit to GND pin POWER. Hmmmm what causes it?Investigate a calibaration and prints the results of the search team stance "so to speak", turned out it started to overheat PQ09RDA1 + overload short-circuit pin-pin end (but not short-circuit to GND).

Internal short-circuit the input PQ09RDA1 pin4 (control switch) which as is well known that the PQ09RDA1 pin4 directly linked to the pin on the ic IXB POWER, so not surprisingly, IXB IC power pin directly to GND short-circuit (or even break) because of the POWER pin voltage kesetoran approximately 14V of the konsletnya PQ09RDA1, hmmm quite reasonable.Before the IC is damaged, you should not let it infect anticipated that similar IBX still sane, for example there is a damage free TV Elko ngganti 10uF/250V but it would be nice if the procedures in anticipation of damage that "may" be experienced by the IXB tetep done. Here are a few modifications (may add durable and not so "far" from the design):1. Change the PIN1 PQ09RDA1 input resistor (R642), the original 1/1W with a 8.2 / 1W. The goal is to PQ09RDA1 more "cold" because the original PQ09RDA1 used to lower the voltage of the SMPS 14V to 9V.2. Replace jumper with a 1N4148 diode 178 with the direction of the arrow towards pin4 PQ09RDA1, the goal is to block the voltage does not let me go to the POWER pin when PQ09RDA1 if damage / short-circuit.3. When PQ09RDA1 damaged, replace it as an alternative to KIA78R09. And if you want more "somewhat safe" anymore, replace it with KIA78R08 wrote (but the effect on image quality rather "how so" under the eyes of a TV repair shop).4. If after the modification was not turned off the TV (the voltage at Pin2 PQ09RDA1 still exist despite the in-OFF from the remote), please attach a resistor of pin4 PQ09RDA1 to GND with a smaller value of 8K2 or less.May be useful, so TV is more durable and ultimately customer satisfaction and tomorrow bring TV-Kriuk Kriuk damaged neighboring property to be serviced.