Rail Adjustment Via Multimeter (Alternative Method) - Christie CP2000-M Service Booklet

Section 5: Parts and Module Replacement

RAIL ADJUSTMENT VIA MULTIMETER (ALTERNATIVE METHOD)

(1 hour)
1. Ensure the projector is powered down and AC is disconnected.
2. Remove the top lid. Refer to
3. Use a #2 Phillips™ screwdriver to loosen the 3 thumbscrews on the safety shield (Figure 2-47).
4. Remove the 6 screws securing the high security cover, unlock the high security access lock, lift the
lid and slide out.
5. Remove the intake duct. Refer to
6. Use a #2 Phillips™ screwdriver to loosen the 2 thumbscrews on top of the cardcage.
7. Use a #1 Phillips™ screwdriver to remove the 6 hex screws from the front cardcage plate.
8. Unclip the harness clips securing the harnesses to the top of the cardcage.
9. Pull the cardcage out a few centimeters in order to access the connections on the back of the
Motherboard. NOTE: If more clearance is required disconnect the LVDS harnesses in order to
pull the cardcage out further.
10. Connect a Fluke multimeter to the P3 connection on the Motherboard. Refer to the label on the
high security cover.
11. Insert a long flathead tweaker through the designated cutout and position it into the 3.3V or 5V
adjustment dial (Figure 2-48). As the tweaker is rotated observe the meter to see the adjustment
value of the rail. Continue to turn the dial until the specified range is achieved.
Rail Adjustment Ranges
• 3.3V Rail Adjustment: 3.366 ± 0.003
• 5V Rail Adjustment: 5.110 ± 0.003
2-42
2.5.5 Top Lid, on page 2-10.
2.5.12 Intake Duct, on page 2-15.
CP2000-M/MR Service Booklet
020-100220-02 Rev. 1 (07/08)