Hitachi-CP-X995-W-Service-Manual(1) 电路图 维修手册.pdf

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1、YKNo.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 fire, electric shock, injury, harmful radiation and materials, vario

2、us 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 fingers. The lamp becomes too hot. 2.Never touch the lamp bulb with a finger or any

3、thing 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 modu

4、le 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 specified. Service Warning 1. Features -2 2. Specifications-2 3. Names of each part-3 4. Adjustment -7 5. Troublesho

5、oting- 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 RadioFans.CN 收音机爱 好者资料库 2 CP-X995W 3 CP-X995W 1. Features High

6、 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 RadioFans.CN 收音机爱 好者资料库 2 CP-X995W 3 CP-X995W 3. Names of each part Parts names RadioFans.C

7、N 收音机爱 好者资料库 4 CP-X995W 5 CP-X995W 4 CP-X995W 5 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. 6 CP-X995W 7 CP-X995W Indicators Message The POWER indicator, LAMP indicator, and TEMP i

8、ndicator are lit and blank as follows. Take the appropriate measures. 6 CP-X995W 7 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 mo

9、re 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

10、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 Ghos

11、t 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

12、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 adj

13、ustment are shown in Table 4-1-2. Tabel 4-1-2: Required adjustment : need : recommend : no need 8 CP-X995W 9 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 adjustmen

14、t. 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 stri

15、pes 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 Adjus

16、tment menu to adjust vertical stripes of B color. 4-3 Flicker adjustment (V.COM adjustment) Signals for internal adjustmentAdjustment 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 flic

17、ker 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 t

18、he G color flicker. 4. In the same way, use DAC-P - V.COM-B: in the Adjustment menu to adjust the B color flicker. 8 CP-X995W 9 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 corre

19、ction 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 co

20、ntrol 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. Dont adjust GAMMA, SUB-BRIGHT, and G: in the Adjust menu. Because we want to keep the best contrast ratio. 5. Then adjust colors R

21、 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 bal

22、ance 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) 10 CP-X995W 11 CP-X995W 4-6 Color uniformity adj

23、ustment 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 (

24、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

25、(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

26、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 als

27、o 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. Rese

28、t 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. Si

29、ngle tone and monochrome resets cannot be performed. Adjust menu Adjust Tone menu Major adjustment lattice point position 10 CP-X995W 11 CP-X995W Adjustment procedure 1 (when a color differential meter is used) 1. First adjust MID-L tone G:. 2. Select adjustment point No.2G:. When the background is

30、not G monochrome, press the MENU SELECT key on the Remote control transmitter to change to solid G monochrome. 3. Measure the illumination at adjustment points No. 2, No.3, No.10 and No.11. The values should be: No.2 = Y2 lx No.10 = Y10 lx No.3 = Y3 lx No.11 = Y11 lx 4. No.2 and No.3 adjustment poin

31、t have the average of Y2 and Y3. Y2 = ( Y2 + Y3 ) / 2 2 % Y3 = ( Y2 + Y3 ) / 2 2 % 5. No.10 and No.11 adjustment point have the average of Y10 and Y11. Y10 = ( Y10 + Y11 ) / 2 2 % Y11 = ( Y10 + Y11 ) / 2 2 % 6. Then adjust MID-L tone R and B. When the background is G monochrome, press the MENU SELEC

32、T key on the Remote control transmitter to change to solid white. 7. Measure the color coordinates of adjustment point No.1 and make a note of them. Assume that they are x = x1, y = y1. Note: When the CL-100 color and color difference meter is used, the (delta) mode is convenient. When adjustment po

33、int No.1 color coordinate has been selected, set the slide switch on the side to (delta) while holding down the F button on the front panel. The measurement shown after this displays the deviation from measurement point 1. 8. Measure the color coordinates of measurement point No.2 and adjust No.2R:

34、and B: so that the coordinates are as follows. x = x1 0.003 , y = y1 0.005 (Target) x = x1 0.010 , y = y1 0.020 9. Similarly, measure adjustment points No.3 to No.17 and adjust their color coordinates starting in order from the small number points. This completes adjustments required for MIN. Note:

35、Since excessive correction may lead to a correction data overview during internal calculations, use the following values for reference. No.2 to No.5 40 or less No.6 to No.9 50 or less No.10 to No.13 70 or less No.14 to No.17 120 or less 10. Then adjust MIN tone G so that the adjustment data set two

36、times as much as MID-L tone G. This completes G color adjustments. 11. Then adjust MIN tone R and B. Select No.2 B: and press the MENU SELECT key on the Remote control transmitter to change to solid white. 12. Measure the color coordinates of adjustment point No.1 and make a note of them. Assume tha

37、t they are x = x1, y = y1. 13. Now measure the color coordinates of measurement point No.2 and adjust No.2R: and B: so that the coordinates are as follows. x = x1 0.005 , y = y1 0.010 (Target) x = x1 0.020 , y = y1 0.040 14. Similarly, measure adjustment points No.3 to No.17 and adjust their color c

38、oordinates starting in order from the small number points. This completes MIN tone adjustments. 15. Now make similar adjustments for MID-H tone. (Adjust MID-H tone G so that the adjustment data set half as many as MID-L tone G.) 16. Now make similar adjustments for MAX tone. (Adjust MAX tone G so th

39、at the adjustment data set half as many as MID-L tone G.) 12 CP-X995W 13 CP-X995W Adjustment procedure 2 (visual inspection) 1. First adjust MIN tone G:. 2. Select No.2 G:. If the background is G monochrome, press the MENU SELECT key on the Remote control transmitter to change to solid white. 3. Vie

40、w measurement point No.2 and No.3. Lower the G color intensity only of the color point whose G color is more intense than measurement point No.1. 4. View measurement point No.10 and No.11. Lower the G color intensity only of the color point whose G color is more intense than measurement point No.1,

41、and raise the intensity of the point whose color intensity is lower than measurement point No.1. 5. Now adjust the MIN tone for colors R and B. 6. View measurement points No.2, No.3, No.10 and No.11. Adjust the R and B of each measurement point so that they have the same color as measurement point N

42、o.1. Adjustment technique: First, adjust B: of the point whose color is to be adjusted so that it approximates that of No.1. If R: is low at this time, the image will have cyan cast, in which case R: is increased. On the other hand, if R: is excessive, the image will have a magenta cast, in which ca

43、se R: is decreased. Overall, a cyan cast makes it easy to see color shading. 7. Next, view measurement points No.4, No.5, No.12, No.13 and make similar adjustments. 8. Then adjust measurement points No.6, No.7, No.8, No.9, No.14, No.15, No.16 and No.17. This completes the MIN tone adjustments. 9. Ma

44、ke similar another three tones as described in steps 1 to 8 above. 12 CP-X995W 13 CP-X995W No. 2 deviation range No. 10 deviation range No. 3 deviation range No. 11 deviation range No. 4 deviation range No. 12 deviation range No. 5 deviation range No. 13 deviation range No. 6 deviation range No. 7 d

45、eviation range No. 8 deviation range No. 9 deviation range No. 14 deviation range No. 15 deviation range No. 16 deviation range No. 17 deviation range 14 CP-X995W 15 CP-X995W 5. Troubleshooting Check points at trouble shooting Connectors on the back side of PWB assembly DRIVE are drawn by dotted line. 14 CP-X995W 15 CP-X995W 16 CP-X995W 17 CP-X995W 16 CP-