Saturday, January 21, 2017

Hitachi Projector - Hitachi CP-W8240 – CP-X8150 – Service mode – White balance adjustment – VCOM Adjustment

Service mode
1. Before starting adjustments, warm up projector for about 10 minutes.
Turn off the automatic keystone function in OPTION Menu. If you changed [AUTO KEYSTONE] from [ON] to [OFF], set to [ON] after adjustment.
2. Set Zoom Wide to Max. And project an image with more than 1m (40 inches) in diagonal size.
3. Normalizing the video adjustments Press the [MENU] button to display the EASY menu. If Advanced menu comes up, move to the Easy menu.
Select the RESET in the EASY menu and press the [Right Arrow  ] or [ENTER] button to open the RESET dialog. Choose the EXECUTE with the [ Right Arrow] button.
4. Perform all adjustments from the FACTORY MENU. Operate as follows to display the FACTORY MENU.
Accessing Service menu Using the Remote
a. Press the [MENU] button of the remote control to display the Easy menu. (If the Advanced menu appears, move to the Easy menu.)
b. Select the RESET in the Easy menu, and then press the [ Right Arrow ] or [ENTER] button.
c. Next, press the [RESET] button one time. And hold the [RESET] button for 3 seconds or longer (the FACTORY MENU will appear)
Accessing Service menu Using Projector Key pad
a. Press the [ UP Arrow], [DOWN Arrow ], [LEFT Arrow ] or [RIGHT Arrow ]  button of the projector to display the Easy menu. (If the Advanced menu appears, move to the Easy menu.)
b. Select the RESET in the Easy menu, and then press the [ Right Arrow ] button.
c. Next, press the [Down Arrow ] button one time. And repress and hold the [Down Arrow] button together with the [INPUT] button for 3 seconds or more (the FACTORY MENU will appear).
VCOM Adjustment
Test patter for adjustment
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, sometimes has a horizontal line across the screen.
Ghost Adjustment
Test pattern for adjustment
Adjustment procedure 
1.Set the GHOST R, G, B in OPTION-SERVICEGHOST Menu to 0.
2. Use DAC-P - GHOST - R: in the FACTORY MENU to make the ghosting disappear.

(Set the adjustment value to default, and then raise the value. When the ghosting appears on the left side of the test pattern, decrease the value by 6.)
3. In the same way, use DAC-P - GHOST-G: in the FACTORY MENU to adjust so that green ghosting is at a minimum.
4. In the same way, use DAC-P - GHOST-B: in the FACTORY MENU to adjust so that blue ghosting is at a minimum.
White Balance Adjustment
1. First, adjust the G color.
2. Select GAMMA, SB-CNT, and G: in the FACTORY MENU. If the background is 
solid white, press the [ENTER] key on the Remote control transmitter to change [G] to monochrome in the 33-tone grayscale.
3. Adjust GAMMA, SB-CNT, and G: in the FACTORY MENU so that brightness of 33 steps is best.
4. Don’t adjust GAMMA, SB-BRT, and G: in the FACTORY MENU because we want to keep the best contrast ratio.
5. Then adjust colors R and B.
6. Select GAMMA, SB-CNT, and G: in the FACTORY MENU. If the background is solid white, press the [ENTER] key on the remote control to change to [W] monochrome in the 33-tone grayscale.
7. Adjust GAMMA, SB-BRT, R: and B: in the FACTORY MENU so that low-brightness white balance is best.
8. Adjust GAMMA, SB-CNT, R: and B: in the FACTORY MENU so that middle-brightness white balance is best.
9. Repeat steps 7 and 8 above, and adjust so that brightness white balance of 33 steps is best.