MITSUBISHI - WD-52627 / 52628 / 62627 / 62628 / 62827 / 62927 / 73727 / 73827 / 73927 - OPTICAL ENGINE ADJUSTMENT

MITSUBISHI - WD-52627 / 52628 / 62627 / 62628 / 62827 / 62927 / 73727 / 73827 / 73927 - OPTICAL ENGINE ADJUSTMENT

TEST SIGNAL ACTIVATION

• Press “MENU-2-4-5-7” (Service Mode)
• Press “REW” (Test Pattern).

• Mechanical Optical Engine Adjustments are made using the UNIT-ADJUSTER shown in Figure.The UNIT-ADJUSTER is mounted under the Light Engine on the Engine Plate. It is accessed from the front of the set through the opening for the Card Reader. Refer to the model specific Disassembly Instructions and remove the:
• Back Cover
• Speaker Grille
• Card Reader

ACCESSING MECHANICAL ADJUSTMENTS

WD-52627 / 62627 / 52628 / 62628

• Pull Speaker Grille out.
• Remove (2) screws (A) and pull Card Reader to access adjustment.

WD-62827

• Remove (6) screws (A) to remove card reader cover.
• Remove (2) screws (B) to remove card reader.

WD-62927

• Pull Pedestal Cover out. Adjustment is now accessible.

WD-73727 / 73827

• Pull the Panel Caps from the unit to remove them.
• Remove (4) screws (A) to pull out entire Card Reader Unit.

WD-73927

• Remove (16) screws (A). 8 on each side. (Remove only the outside screws. Do not remove inside screws; they are for the Screen Frame)
• Pull Front Panel Escushions from unit.
• Remove (8) screws (B) and remove the Pedestal Cover. Mechanical adjuster is now accessible

Locking Screws and Wedge Removal

Before mechanical adjustments can be made, locking screws must be loosened.

• [B-1] is located on the front of the UNIT-ADJUSTER.
• In 52” and 62” models [B-2] is accessible from the rear of the unit on the right side of the Optical Engine
• WARNING: DO NOT loosen [B-2] too far. The nut on the other side may drop off. Then Optical Engine must be removed to re-install the nut.

• In 73” models, loosen the 4 screws [C] in the Joining Bracket.
• Remove the rubber wedge shown in

ADJUSTMENT PROCEDURES

Adjustment Locations

The Mechanical Adjustments are accessed though the opening for the Card Reader.  Locations of the Adjustments are shown below

CAUTION: Do Not force an adjustment past the end of it’s range, UNIT-ADJUSTER damage may result.

Rotation Adjustment

Horizontal Keystone Adjustment

• Adjust [A-2] to remove any picture rotation.

Vertical Keystone Adjustment

• Adjust [A-3] to remove horizontal keystone distortion. NOTE: Vertical Positioning may shift.

• Adjust [A-1- To remove vertical keystone distortion.  [A-1] can only be accessed by the front access hole shown above.  NOTE: Horizontal Positioning may shift.

After Adjustment

• Slide the rubber wedge under the Engine slowly until it makes solid contact.)
• Tighten side Locking Screws [B-2].
• Check the Picture, re-adjustment may be required (usually rotation).
• Tighten front Locking screw

ELECTRICAL ADJUSTMENTS {Click on picture to Enlarge}