Mitsubishi Electronics V31 CHASSIS, V30+, V29 Rotation Adjustment, Horizontal Keystone Adjustment

MODELS: WD-52627 / 52628 / 62627 / 62628 / 62827 / 62927 / 73727 / 73827 / 73927

Rotation Adjustment

Adjust [A-2] to remove any picture rotation

Horizontal Keystone Adjustment

Adjust [A-3] to remove horizontal keystone distortion.

NOTE: Vertical Positioning may shift

Vertical Keystone Adjustment

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.

Figure 5: Adjustments

After Adjustment

1)Slide the rubber wedge under the Engine slowly until it makes solid contact. (See Figures 3 & 6)

2)Tighten side Locking Screw [B-2]. (Figure 2)

3)Check the Picture, re-adjustment may be required (usually rotation).

4)Tighten front Locking screw [B-1]. (Figure 3)

RUBBER WEDGE

Figure 6: Wedge Insertion

Electrical Adjustments

[Format Circuit]

Horizont/Vertical Positi0n Adjust- ment

Purpose: To center the picture on the screen.

Symptom: Picture is off center.

Measuring
Instrument
Test Point	----
Ext. Trigger	------
Measuring	------
Range
Input Signal	Internal Test Patern.

Input Terminal

Video

1.Press “MENU-2-4-5-7”, activates the Service Mode..

2.Select the “FORMAT” function (AUDIO button).

3.Press “REWIND”, activates the Overscan Test Pattern

4.Select “Item 1” HPOS (VIDEO button).

5.Use the ADJUST buttons to center the picture horizontally.

6.Press ENTER to save the new setting.

7.Select “Item 2” VPOS (VIDEO button).

8.Use the ADJUST buttons to center the picture vertically.

9.Press ENTER to save the new setting.

10.Press MENU to exit the Service Mode.

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