I have a 42 inch high def Soniq QSL470 LCD Tv with a mainboard marked E232205. The board is dead and I am unable to get a schematic for it or a reasonable replacement board. The screen and power supply seem ok so I researched the board and found one of the LM1117s running extremely hot. Its output was feeding a dead short.
Unfortunately, this regulator fed almost 90% of the rest of the board, so by track elimination (cutting), I quickly tracked it down to a shorted SIL9185ACTU part. This is a HDMI switcher, 3 in 1 out. I don't have any in stock and where I live it'd be a month or more before any would arrive. So I was going to ask a couple of questions.
First, do you know of any LG/Samsung/Sony boards that might use this part? I've been looking but no luck yet. I know it's in some earlier Sharps and it's also used in Yamaha/Onyko receivers, but there's a chance it's down in my board stock somewhere. I also know it's going to be a devil for me to solder this 80pin 0.5mm pitch chip. I have a hassle every time I do a gamma chip (solder, check for shorts, flux, solder, check for shorts, repeat....) and this one has almost twice the pins. Solder dragging never seems to work for me, there are always shorts.
Second, and this is more of a suck it and see, do you think I'd be lucky if I could just wire one of the three HDMI 5 pins inputs directly to the single HDMI out of the chip? I know the processor will winge there's nothing to talk to via the I2C bus, but does that matter? I'm only talking about 5 or so wires. No sure whether to try this, if it might hurt something else. I'm going to remove the chip, clean it up and power it up just to see what happens first.
One HDMI in will do for this unit, just curious.
Unfortunately, this regulator fed almost 90% of the rest of the board, so by track elimination (cutting), I quickly tracked it down to a shorted SIL9185ACTU part. This is a HDMI switcher, 3 in 1 out. I don't have any in stock and where I live it'd be a month or more before any would arrive. So I was going to ask a couple of questions.
First, do you know of any LG/Samsung/Sony boards that might use this part? I've been looking but no luck yet. I know it's in some earlier Sharps and it's also used in Yamaha/Onyko receivers, but there's a chance it's down in my board stock somewhere. I also know it's going to be a devil for me to solder this 80pin 0.5mm pitch chip. I have a hassle every time I do a gamma chip (solder, check for shorts, flux, solder, check for shorts, repeat....) and this one has almost twice the pins. Solder dragging never seems to work for me, there are always shorts.
Second, and this is more of a suck it and see, do you think I'd be lucky if I could just wire one of the three HDMI 5 pins inputs directly to the single HDMI out of the chip? I know the processor will winge there's nothing to talk to via the I2C bus, but does that matter? I'm only talking about 5 or so wires. No sure whether to try this, if it might hurt something else. I'm going to remove the chip, clean it up and power it up just to see what happens first.
One HDMI in will do for this unit, just curious.
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