Disassembly; Reassembly; Troubleshooting - Okii Systems USB Focus Controller User Manual

Disassembly

Disassembly of the FC1 USB Focus Controller requires the use of a 1/16" and 5/64" Allen wrench,
and a Phillips screwdriver:
1. The back plate of the controller case is secured by two visible Phillips head screws. Removing
the back plate will expose the circuit board and AAA battery holders.
2. If further disassembly is required, the knob must be removed. Use a 1/16" Allen wrench to
loosen the set screw that secures the knob to the rotary encoder shaft. A full turn should be all
that is necessary to slip the knob off the shaft. Be careful not to remove the set screw completely
from the knob, as it can be easily lost. Beneath the knob is a nylon washer, which can be set
aside.
3. Use a 5/64" Allen wrench to remove the two board mounting screws located between the
battery holders. Once unscrewed, the entire circuit board can be lifted out. The LED light pipe
and nine button inserts are now visible and can be easily removed.

Reassembly

Reassembly is done in the reverse order:
1. Verify that the nine button inserts and LED light pipe are installed.
2. Insert the circuit board into the case, lining up the power switch, rotary encoder, and USB
port.
3. Replace the two board mounting screws, making them snug.
Do not over tighten!
4. Place the nylon washer in the recessed groove on the underside of the knob.
5. Line up the knob set screw with the flat side of the rotary encoder, and then slide it onto the
rotary encoder shaft.
6. Tighten the knob set screw until snug.
7. Before replacing the back plate, verify that all the buttons work by turning on the controller
and using the switch test mode. When no buttons are pressed and the knob is not moving,
the LED should display solid yellow. For each button pressed individually, the LED should
start blinking.
8. If the LED blinks continuously even though no buttons are pressed and the knob is
stationary, then one of the buttons is stuck. Disassemble the controller and correct the stuck
button.
9. Replace the back plate and secure it with the two Phillips head screws.

Troubleshooting

Many connection problems are caused by rapidly turning the camera or controller off and on, as
this does not allow the USB connection to properly reset. For optimal use and reliability, always
give the controller and/or camera several seconds to fully turn off or on before flipping the power
switch again.
Controller displays constant blinking red LED.
This indicates a USB bus error. Turn off the camera, wait for the controller to display a yellow
LED, then turn the camera back on.
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