Wybron FORERUNNER 4540, User Manual

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1. Apply power to the color changer.
2. Press the recessed "Load Gel" button located in the lower
right hand corner of the color changer. The rollers will rotate
to the trailer load position. The rapidly flashing "DMX" LED
indicates the rollers are either moving toward the trailer load
position or are at the trailer load position.
3. Put a strip of gaffer's tape on the edge of the gelstring
trailer. Holding the trailer, let the rest of the roll hang off the
right side of the color changer.
4. Center the edge of the trailer between the two ends of the
left roller as shown to the left. Tape the trailer along the top
of the roller as shown.
5. Hold the gelstring loosely in your right hand and press the
"Load Gel" button again. The rollers will rotate to the leader
load position. This will wind the gelstring onto the left roller.
The "DMX" LED will flash slowly to indicate the rollers are
either moving toward the leader load position or are at the
leader load position.
6. Turn the "Adjust Gel" trim pot to bring the leader end of
the gelstring to the top center of the right roller. Gel material
of different thickness will cause variation in the leader end
position. This is normal.
7. Put a strip of gaffer's tape on the gelstring leader.
8. While holding the end of the gelstring, turn the spring roller 3.5 turns toward the
drive roller. The sticker at the bottom end of the roller has a black line on it to
help you judge the number of turns
9. Tape the gelstring to the spring roller.
10. Press the "Load Gel" button once again. The gelstring will now move to the first
frame if no DMX signal is present or to the commanded DMX level if it is.
11. Replace the front panel and tighten the thumb screws securely.
Note: As the gelstring becomes worn, you may find it necessary to adjust the position
of frame 1. This is normal and is done by turning the "Adjust Gel" trim pot.
Figure 11
Gaffer’s tape
Frame 16
Frame 16
Trailer