Convergence Mechanism Description - Christie CP2230 Service Manual

Section 3: Service Setups

3.5.3 Convergence Mechanism Description

• Remove all jewelry (rings, watches, necklaces, bracelets etc.) before adjusting convergence.
• The lockdown and adjustment screws are located underneath the formatter board. The
access holes/areas are surrounded by electronic components that can easily be shorted out
with your tools. Use extreme caution when adjusting!
Each of the three Formatter/DMD/Fly-In-Place plate
assemblies are secured to the prism assembly with four
2.5mm lockdown screws. (Figure 3-10) Once those
screws are loosened on a chosen assembly, the entire unit
is free to be adjusted with the three 1.5mm adjustment
screws. (Figure 3-11) The spring plunger has the job of
pushing back against the adjustment screw head as it is
loosened (counter-clockwise). The spring plunger will not
have the force needed to push the unit back if the
lockdown screws are left too tight. The spring plunger is
adjustable; however, it is set to the middle of its travel and
should not need to be adjusted in the field.
Turning an adjustment screw clockwise pulls the unit
towards the fixed block and compresses the spring plunger.
Turning it counter-clockwise allows the spring plunger to
push back against the fixed block, moving it away from the
block in the opposite direction. NOTE: Each adjustment
screw's rotation and corresponding adjustment direction
will be described in 3.5.4 Adjustment Procedure, on page
3-11 for the two types of formatter assemblies we will be adjusting.
3-10
Figure 3-11 Convergence Mechanism Overview
Figure 3-10 Lockdown Screws (2.5mm)
CP2230 Service Manual
020-100562-06 Rev. 1 (05-2016)