ETC Source Four jr and jr Zoom CE User Manual - Manual (Page 8)

6 Source Four jr/jr Zoom CE User Manual
English
Step 5: Push down on the lamp base until the lamp seats firmly. When properly installed, the top
of the lamp’s base will be even with he top edges of the retention brackets.
Step 6: Press lamp retaining clip across lamp base to secure.
Step 7: Reinstall the lamp housing by aligning the bolt hole and tightening the knurled bolt.
Centering lamp and adjusting the field
The two concentric knobs located on the lamp housing allow you to align the lamp and adjust its
field. See Figure 4 . The outer knob centers the lamp within the reflector. The inner knob adjusts the
lamp’s field.
Step 1: Turn on the Source Four jr / jr Zoom CE and aim it at a flat surface. Adjust the barrel to
create a hard edge.
Step 2: Unlock and loosen the outer knob by turning it counterclockwise.
Step 3: Gently move the outer knob from side to side and up and down until the lamp is centered
within the reflector.
Step 4: Once the lamp is centered, turn the outer knob clockwise to lock it in place.
Step 5: Finally, turn the inner knob either clockwise or counterclockwise to achieve an optimum
flat field. See Figure 5 .
Focusing the beam
On a fixed field angle Source Four jr., with a 26°, 36° or 50° lens, adjust the lens single beam focus
knob to focus the edge of the beam. On a Source Four jr Zoom, adjust the position of both lens
C A U T I O N : Improperly installed lamps cause premature lamp failure and socket problems.
Outer Knob - lamp
center adjustment
Inner Knob -
peak/flat field
adjustment
Rear lamp
housing
Figure 4 Figure 5
Flat field-best adjustment
Hot spot - lamp pulled out
too far
Field with hole - lamp
pushed in too far
Beam focus knobs
Figure 6