HITACHI CP-X256U
Service Manual

CP-X256U(CC9XM2DN)/ED-X15E(CC9XM2DN)

4-2 Flicker adjustment (V.COM adjustment)
Test pattern for the adjustment Adjustment procedure 1. Use DAC-P - V.COM - R: in the FACTORY MENU to adjust so that the flicker at the center of the screen is less than the flicker at the periphery. (When the flicker is about the same across the whole screen, adjust so that the flicker at the center of the screen is somewhat less than elsewhere.) 2. In the same way, use DAC-P - V.COM-G: in the FACTORY MENU to adjust the G color flicker. 3. In the same way, use DAC-P - V.COM-B: in the FACTORY MENU to adjust the B color flicker. NOTE: The test pattern shown on the left sometimes has a horizontal line across the screen.

128/255

4-3 Ghost adjustment
Test pattern for the adjustment Adjustment procedure 1. Make this adjustment after completing the adjustment in the section 4-2. 2. Use DAC-P - GHOST - R: in the FACTORY MENU

30% 30% 0/255 112/255

to adjust so that R color ghost is at a minimum. (Set the adjustment value to default, and then raise the value. When a ghost appears to the left of a vertical line, reduce the value by 6 steps.) 3. In the same way, use DAC-P - GHOST-G: in the FACTORY MENU to adjust so that G color ghost is at a minimum. 4. In the same way, use DAC-P - GHOST-B: in the FACTORY MENU to adjust so that B color ghost is at a minimum.

4-4 DC OFF adjustment (vertical bars adjustment 1)
Test pattern for the adjustment
64 /255 88 /255 112 /255 136 /255 160 /255

Adjustment procedure 1. Make this adjustment after completing the adjustment in the section 4-3. 2. Use STRIPE - DCOFF - No. 0 - R : in the FACTORY MENU and use it so that vertical bars are minimized. 3. In the same way, use STRIPE - DCOFF - No. 0 G : in the FACTORY MENU and use it so that vertical bars are minimized. 4. In the same way, use STRIPE - DCOFF - No. 0 B : in the FACTORY MENU and use it so that vertical bars are minimized.

Press ENTER key

160 /255

136 /255

112 /255

88 /255

64 /255

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