Question about Canon BubbleJet i9950 InkJet Photo Printer

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I have Canon I9950 Printer with faulty Logic board QM2-1272

I try the find out some parts what is they are which is part package has Marked D6F 5 Pin SOT it looks like to me optocoupler but I am not sure. Board number QM2-1272, on the board silk screen printed DA401 ~ DA410 which is used 10 PCS same part. located below the connectors JCR3, JCR2, JCR1 Left side of the logic board, on my board several of them smoked I wonder any one can help me about verify those parts.

Thank You all in Advance

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