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Convergence Instruction Sheet

7 of 10

020-100703-01  Rev. 1   (05-2011)

RED/GREEN/BLUE FORMATTER CONVERGENCE ADJUSTMENT

 Remove all jewelry (rings, watches, necklaces, braclets etc.) before 

adjusting convergence.

NOTE:

 

Do not apply excessive force on the adjustment screws. This might cause the convergence 

adjustment to become misaligned once you remove the adjustment tool.

The Red and Green Formatters are identical in physical layout and adjuster function. The Blue 
formatter board is slightly different in physical layout, but the adjustment functions are the same. The 
vertical and twist adjustments (Screws 1 and 2) interact with each other, while the horizontal 
adjustment (Screw 3) is indpendent, as described in 

(Figure 7)

.

Figure 7  Red/Green/Blue Formatter Convergence Adjustment

The physical layout of the Formatter boards dictates the behavior of the Twist and Vertical 
adjustments:
• The adjustment of the twist and vertical is more like a “Twist with the left-side of the screen as a 

sliding hinge point to allow vertical travel”.

Summary of Contents for CP4220

Page 1: ...ructions drawing provided inside the top lid of the projector TOOLS REQUIRED 2 5 mm driver with heat shrink tubing 2 0 inch and 6 5 inch lengths included with projector One driver is located on the th...

Page 2: ...ove Figure 1 Remove top Lid from Projector Remove the high security lid to access components in the light engine and cardcage compartments NOTE Only Christie authorized service technicians should open...

Page 3: ...he fan packs can be removed for a short time to access the adjustment screws If this is necessary you can verify the temperature at the TPC status window The projector has three separate DMD panels to...

Page 4: ...le shifts in convergence or DMD focus The prism temperature should be monitored during the adjustment and kept within a few degrees of the nominal temperature achieved above by lowering the lamp power...

Page 5: ...or you are working on if it is not present 2 Zoom and focus the image so you can see the entire outer edge of the test pattern frame Figure 4 Alignment and Framing Pattern 3 You should be able to judg...

Page 6: ...one side of the screen to the other observing any change in vertical position of the color in question relative to the point where you started Figure 6 is an example of a projector with two problems R...

Page 7: ...physical layout and adjuster function The Blue formatter board is slightly different in physical layout but the adjustment functions are the same The vertical and twist adjustments Screws 1 and 2 inte...

Page 8: ...ight 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...

Page 9: ...ESSMENT When should you be satisfied with your adjustments Read the following section before coming to a conclusion Figure 10 1 The best possible convergence would be described as follows a The center...

Page 10: ...become slightly non uniform a In practice this extra increase in size has generally appeared on the lower right of the image causing an apparent clockwise twist in the lower right corner only the upp...

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