Christie CP4220 Instruction Sheet page 8

• The vertical and twist adjustment screws (Screw 1 and 2) interact with each other such that if one is
turned in the opposite direction of the other, the twist is affected.
• If both screws are turned equal amounts in the same direction, the image moves vertically.
• Remove the Light engine air filter and fan pack to access the blue convergence adjustment screws.
For details, refer to 5.6.1 Light Engine Air Filter, on page 5-11 and 5.7.2 Light Engine Fan Pack
(4 fans), on page 5-13 of the CP4220 and CP4230 Service manauls (P/N: 020-100691-xx/020-
100622-xx). NOTE: Cooling is greatly affected by removing the filter and fan pack assembly. The
FPGA temperatures can be monitored from the TPC.
You do not always have to turn the screws simultaneously; however, adjusting one at a time will cause
the need for an equal or equal and opposite turn on the other to achieve the adjustment desired.
It is a good idea to locate the shorter blade 2.5mm driver on adjusting screw #2 (especially on the red
Satellite board), and use the longer blade 2.5mm driver for screw#1 and horizontal screw #3.
Figure 8 Red/Green/Blue Formatter Twist and Vertical Adjustments
8 of 10 Convergence Instruction Sheet
020-100703-01 Rev. 1 (05-2011)