Firmware; Led Status - WLtoys V303 Supplemental Information

Appendix 1: WLToys V303 Supplemental Information v18
c. Check soldering on the power distribution board (the FC sits on this). Look for shorts, globs of solder
where they shouldn't be and dull solder (usually an indication of a cold solder joint)
d. On the arms: Check for shorts on the 3 wires from the motors to the ESC (circuit board). Make sure the 2
power lines to the ESC off of the power distribution board are connected and not shorted. There should
be a capacitor (black can) between these power leads on the ESC. Some have sheared off, so you might
want to add a zip-tie around the power leads and some silicon/glue between the capacitor and the zip-
tie.
15. Now you can put your props on  following "Getting Started" #0. Make sure to match the arrow designator on
the props to the arrow on the arm.
a. The props are keyed and appear to have some extraneous plastic inside the hub. Do not remove it. It
does however make it difficult to balance props with some balancers.
b. Read all the rest of "Getting Started" especially #10, since you now have some pretty sharp blades on
the Seeker
16. TIME to FLY
17. Time for photos/videos
a. Balance the Props (search youtube), it is also possible to balance the hubs (search youtube).
b. Ensure Quad arms are all the same height (most important if you have ever crashed).
c. Ensure Prop blades are not bent (important if you have ever crashed). With props on Quad measure the
distance from the table to a prop tip, spin prop 180% and measure the other one. Move the quad to
next motor and repeat. Replace the blade if any not at the height as the majority. Bending may cause a
stress fracture on the blade and is not a recommended fix, since this fracture can lead to a crash of the
quad when flying.
d. If using the isolated GoPro holder slip 4 zip ties through the center of the isolators once installed. Do not
snug them up. This will prevent your GoPro from falling to the ground, and minimize any damage or
isolator loss if crashing to the ground.
e. You probably have to re-adjust your camera to remove the props or legs from getting in your videos.
Don't expect to get you best video on your first flight.

Firmware

There are at least 4 versions of the firmware created by WLToys; 141043, 141045, 141047, and 141075. So far no one
has experienced any problems with the latest update to the firmware. Update 141047 eliminated a FC problem where
the V303 engines will stop when the throttle is turned to minimum position, so you should consider upgrading to it or a
more recent version.

LED Status

The printing of the LED status on the Seeker was pretty messed up in the "Getting Started Guide" #5
5 June-10-2015