Hitachi CP-X995W Manuel utilisateur

YK No.0523E

CP-X995W

(P4XM2)

SERVICE MANUAL

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT.

Multimedia LCD Projector

June 2002 Digital Media Division

Be sure to read this manual before servicing. To assure safety from re, electric shock, injury, harmful

radiation and materials, various measures are provided in this HITACHI Multimedia LCD Projector. Be sure to

read cautionary items described in the manual to maintain safety before servicing.

Caution

1. When replace the lamp, to avoid burns to your ngers. The lamp becomes too hot.

2. Never touch the lamp bulb with a nger or anything else. Never drop it or give it a shock. They may cause

bursting of the bulb.

3. This projector is provided with a high voltage circuit for the lamp. Do not touch the electric parts of power

unit (main), when turn on the projector.

4. Do not touch the exhaust fan, during operation.

5. The LCD module assembly is likely to be damaged. If replacing to the LCD module assembly, do not hold

the FPC of the LCD module assembly.

6. Use the cables which are included with the projector or specied.

Service Warning

1. Features --------------------------------------------------- 2

2. Specications--------------------------------------------- 2

3. Names of each part ------------------------------------- 3

4. Adjustment ------------------------------------------------ 7

5. Troubleshooting---------------------------------------- 14

6. Service points ------------------------------------------ 20

7. Block diagram ------------------------------------------ 24

8. Wiring diagram ----------------------------------------- 25

9. Basic circuit diagram---------------------------------- 29

10.Connector connection diagram -------------------- 77

11.Disassembly diagram --------------------------------- 79

12.Replacement parts list-------------------------------- 81

13.RS-232C communication ---------------------------- 82

Contents

CP-X995W

1. Features

High brightness, High resolution

RGB output terminal

RS-232C Communication

Mouse emulation

Power zoom and power focus functions

Complies with VESA DDC1/2B specifications

Auto-adjustment function

2. Specifications





































































 

 

 

 

 

 

 

 

 















 

 



























CP-X995W

3. Names of each part

Parts names





























 









 

































 



 

 



















































































CP-X995W























 





 









































































 

 















 





















   



































CP-X995W

 











(*2)













  







(*2)

























(*2)









 







 





































OSD Message

The messages as described below may appear on the screen at power ON. Take the appropriate measures when

such messages appears.

CP-X995W

Indicators Message

The POWER indicator, LAMP indicator, and TEMP indicator are lit and blank as follows. Take the appropriate

measures.











 



   



   



   



   

 

 















 

 













  













  





























CP-X995W

4. Adjustment

4-1 Before adjusting

4-1-1 Adjustment menu

1. Before starting adjustment, warm up the projector

for about 10 minutes. (Blank white)

2. Set Zoom Wide to Max. and project an image a

distance of more than 40 inches.

3. Normalizing the video adjustment.

(Press the [MENU] button of the Remote control

transmitter to display the Setup menu, then press

the [RESET] button. And select the [DEFAULT].)

*note : The setup menu is not displayed on with no

signal.

4. Perform all adjustments from the Adjustment menu.

Perform the following operations to display the

Adjustment menu.

a. Press the [MENU] button of the Remote control

transmitter (the Setup menu will appear).

b. Next, press the [RESET] button one time. And

press the [RESET] button again for 5 seconds

or more (the Adjustment menu will appear).

4-2 Ghost adjustment

Signals for internal adjustment







Adjustment procedure

1. Use DAC-P - GHOST - R: in the Adjustment menu

to adjust so that R color ghost is at a minimum.

(Press the [RESET] button, then raise the value.

When a ghost appears to the left of a vertical line,

reduce the value by 2 steps.)

2. In the same way, use DAC-P - GHOST-G: in the

Adjustment menu to adjust so that G color ghost is

at a minimum.

3. In the same way, use DAC-P - GHOST-B: in the

Adjustment menu to adjust so that B color ghost is

at a minimum.

4-1-2 Required adjustment

Relation between the replacement part and required

adjustment are shown in Table 4-1-2.

Tabel 4-1-2: Required adjustment















































: need : recommend : no need

CP-X995W

4-4

NRSH adjustment (vertical stripe adjustment)

Signals for internal adjustment

































Adjustment procedure

1. Make this adjustment after completing the

adjustment in 4-3 Flicker adjustment.

2. Use DAC-P - NRSH - R: in the Adjustment menu to

adjust so that the vertical lines spaced every 12

dots are as inconspicuous as possible.

(Reduce the adjustment value when black stripes

appear in the 2nd or 3rd tone from the black side.

Note that when the adjustment value is lowered,

white stripes may appear in the 2nd or 3rd tone

from the bright side. Should this happen, adjust so

that the stripes are as inconspicuous as possible.)

3. In the same way, use DAC-P - NRSH - G: in the

Adjustment menu to adjust vertical stripes of G color.

4. In the same way, use DAC-P - NRSH - B: in the

Adjustment menu to adjust vertical stripes of B color.

4-3 Flicker adjustment (V.COM adjustment)

Signals for internal adjustment Adjustment procedure

1. Make this adjustment after completing the

adjustment in 4-2 Ghost adjustment.

2. Use DAC-P - V.COM - R: in the Adjustment 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.)

3. In the same way, use DAC-P - V.COM-G: in the

Adjustment menu to adjust the G color flicker.

4. In the same way, use DAC-P - V.COM-B: in the

Adjustment menu to adjust the B color flicker.

CP-X995W

4-5

White balance adjustment (visual inspection)

Preparations

1. Perform these adjustments after the NRSH

adjustment described in Section 4-4.

2. Reset gamma correction before adjustment.

Place the cursor on [GAMMA] in the Adjustment

menu, press the [RESET] key and select

[DEFAULT].

Adjustment procedure

1. First, adjust the G color.

2. Select GAMMA, SUB-CONTRAST, and G: in the

Adjust menu. If the background is white solid,

press the [MENU SELECT] key on the Remote

control transmitter to change to [G] monochrome in

the 28-tone grayscale.

3. Adjust GAMMA, SUB-CONTRAST, and G: in the

Adjust menu so that brightness of 28 steps is best.

4. Don’t adjust GAMMA, SUB-BRIGHT, and G: in the

Adjust menu. Because we want to keep the best

contrast ratio.

5. Then adjust colors R and B.

6. Select GAMMA, SUB-CONTRAST, and G: in the

Adjust menu. If the background is white solid,

press the [MENU SELECT] key on the Remote

control trasmitter to change to [W] monochrome in

the 28-tone grayscale.

7. Adjust GAMMA, SUB-BRIGHT, R: and B: in the

Adjust menu so that low-brigtness white balance is

best.

8. Adjust GAMMA, SUB-CONTRAST, R: and B: in the

Adjust menu so that middle-brightness white

balance is best.

9. Repeat steps 7 to 8 above, and adjust so that

brightness white balance of 28 steps is best.

Adjustment operations (reference)



      







      





CP-X995W





 

 





   





 



4-6 Color uniformity adjustment

Preparations

1. Perform these adjustments after the white balance

adjustment described in Section 4-5.

2. Make a color uniformity adjustment for the

following four tones.

MIN tone (approx. 0% input signal)

MID-L tone (approx. 11% input signal)

MID-H tone (approx. 36% input signal)

MAX tone (approx. 75% input signal)

3. Place the cursor on the tone to be adjusted in the

Adjust menu and press the [ ] key. This displays

the Adjust Tone menu at the bottom of the screen.

Select the major adjustment lattice point No. and

color, and then adjust them.

4. The major adjustment lattice point numbers (a total

of 17 points) corresponds to the major adjustment

lattice point positions in the diagram on the right.

The color uniformity of the entire screen can be

adjusted by adjusting the white balance for each of

the points starting in order from the low numbers.

5. Adjustment point No.1 should not be adjusted,

because it controls the brightness of the entire

screen.

6. To temporarily turn correction off, place the cursor

on “ON” in the Adjust Tone menu and press the [ ]

key. To turn it on again, place the cursor on OFF in

the Adjust Tone menu and press the [ ] key.

7. Although this adjustment can also be made using

internal signals, we will here use the [MENU

SELECT] key on the Remote control transmitter to

select the following two signals.

Solid monochrome adjustment color (use G color

adjustment when a color differential meter is

used).

Solid white (use for adjustment other than

above).

8. Reset color-shading correction before adjustment.

When 4 tones and all colors are to be reset,

place the cursor on [C.UNIF.] in the Adjustment

menu, press the [RESET] key and select

[DEFAULT].

When only 1 tone is to be reset, place the cursor

on the tone to be reset, press the [RESET] key

and select [DEFAULT].

Single tone and monochrome resets cannot be

performed.

Adjust menu

Adjust Tone menu

Major adjustment lattice point position

 





 

  

  

  

 



   





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