Sketch Effect

Ctrl J to copy.

Ctrl+Shift+U to remove color.

Ctrl J to copy the black and white layer. On this layer Ctrl I to invert.

Change the blend mode on inverted layer to Color Dodge.

Go to Filter, Other, Minimum. I used 4 pixels or so. 

Now go back to original layer( the one with color).

Ctrl J to copy.

Drag that layer to the top and reduce the opacity.

Make the top three layers (only) visible. Merge the top three layers so you’re left with two layers. LAYER – MERGE VISIBLE.

Ctrl J to copy.

Go to Filter, Artistic, Poster Edges.

Play with the opacity until you get something you like.