Hitachi-PJ-400-Service-Manual 电路图 维修手册.pdf

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1、SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT. Multimedia LCD Projector October 2004 Digital Media Division No. 0549 SERVICE MANUAL Be sure to read this manual before servicing. To assure safety from fi re, electric shock, injury, harmful radiation and materials, various measures ar

2、e 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 replacing the lamp, avoid burns to your fi ngers as the lamp becomes very hot. 2. Never touch the lamp bulb with a fi nger or anything el

3、se. 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 turning on the projector. 4. Do not touch the exhaust fan during operation. 5. The LCD module a

4、ssembly is likely to be damaged. If replacing the LCD LENS/PRISM assembly, do not hold the FPC of the LCD module assembly. 6. Use the cables which are included with the projector or specifi ed. Service Warning Warning The technical information and parts shown in this manual are not to be used for: t

5、he development, design, production, storage or use of nuclear, chemical, biological or missile weapons or other weapons of mass destruction; or military purposes; or purposes that endanger global safety and peace. Moreover, do not sell, give, or export these items, or grant permission for use to par

6、ties with such objectives. Forward all inquiries to Hitachi Ltd. 1. Features -2 2. Specifi cations -2 3. Names of each part -3 4. Adjustment -5 5. Troubleshooting - 11 6. Service points - 16 7. Wiring diagram - 32 8. Disassembly diagram - 36 9. Replacement parts list - 44 10.RS-232C commands - 45 11

7、. Block diagram - 53 12. Connector connection diagram - 54 13.Basic circuit diagram - 55 Contents PJ400 (C12S) CP-RS55 (C12S) RadioFans.CN 收音机爱 好者资料库 2 1. Features High Brightness Low Noise Compact Body 2. Specifications Liquid clystal panel Drive systemTFT active matrix Panel size1.4cm (0.55 type)

8、Number of pixels800 (H) x 600 (V) Lamp165W UHB RGB signal input RGB IN Video : Analog 0.7Vp-p(75 termination) H/V. sync.: TTL level (positive/negative) Composite sync.: TTL level VIDEO signal input VIDEO IN1.0Vp-p(75 termination) S-VIDEO IN Y signal : 1.00.1Vp-p, (75 termination) C signal : 0.2860.1

9、Vp-p(NTSC burst signal, 75 termination) 0.30.1Vp-p(PAL/SECAM burst signal, 75 termination) AUDIO IN200mVrms, 47k or more (max. 3.0Vp-p) Speaker output1W(mono) Power supplyAC100120V/2.7A,AC220240V/1.5A Power consumption240W Dimensions285 (W) x 73 (H) x 202 (D) mm (Not including protruding parts) Weig

10、ht2.2kg(4.85lbs) Temperature range Operation : 535C Storage : -2060C Accessories Remote control x 1 RGB cable x 1 Power cords x 3 Batteries x 2 Filter cover for bottom up use x 1 Users manuals x 1 RadioFans.CN 收音机爱 好者资料库 3 3. Names of each part S-VIDEOVIDEOAUDIORGBCONTROL K Lens Lens cover Filter co

11、ver (Air fi lter and intake vent are inside.) Elevator button Elevator foot Remote sensor Focus ring Vent AC inlet Power switch Elevator button S-VIDEO port VIDEO port CONTROL port Projector Lamp cover (Lamp unit is inside.) Elevator foot Bottom side Speaker Front-Right side Rear-Left side Control b

12、uttons Ports (See below.) Vent Ports AUDIO port Restart switch RGB port Kensington lock slot NOTE (*) About Restart switch: This Projector is controlled by an internal microprocessor. Under certain exceptional circumstances, the projector may not operate correctly and the microprocessor will need to

13、 be reset. In such a case, please push the Restart switch by using a cocktail stick or similar and before turning on again, make the projector cool down at least 10 minutes without operating. Only push the Restart switch in these exceptional instances. Part names RadioFans.CN 收音机爱 好者资料库 4 STANDBY/ON

14、 INPUT MENU LAMP TEMP POWER VIDEORGBSEARCH FREEZE OFF ON MAGNIFY ASPECTAUTOBLANK MUTE VOLUME KEYSTONE POSITION ESC ENTER MENU RESET ZOOM+ - LAMP indicator TEMP indicator POWER indicator INPUT button Cursor buttons , STANDBY/ON button Controls Remote control SEARCH button RGB button VIDEO button ASPE

15、CT button MAGNIFY ON button OFF button FREEZE button POSITION button ESC button STANDBY/ON button AUTO button BLANK button VOLUME button MUTE button KEYSTONE button Zoom + button - button MENU button Menu cursor buttons , ENTER button RESET button 5 4. Adjustment 4-1 Before adjusting 4-1-1 Selection

16、 of adjustment When any parts in the table 4-1 are changed, choose the proper adjusting items with the chart. Table 4-1: Relation between the replaced part and adjustment Replaced part Adjustment Convergence (Chap.4-2) E-POS (Chap.4-3) Ghost (Chap.4-4) Flicker (Chap.4-5) NRSH (Chap.4-6) White balanc

17、e (Chap.4-7) Color uniformity (Chap.4-8) Dichroic optics unit LCD/LENS prism assembly PWB assembly Main Lamp unit assembly : means need for adjustment. : means not need for djustment. : means recommended. 4-1-2 Setting of condition before adjustment 1. Before starting adjustment, warm up projector f

18、or about 10 minutes. 2. Set Zoom Wide to Max. And project an image with more than 1m (40 inches) in diagonal size. 3. Normalizing the video adjustment Press the MENU button to display the Easy menu. If Advance menu comes up, move to the Easy menu. Select RESET in the Easy menu and press or ENTER but

19、ton to open the RESET menu window. Choose EXECUTE with button. Note that no signal input may not allow to reset the adjustments. 4. Select PICTURE GAMMA in the Advance menu to set to DEFAULT1. Note that PICTURE menu is not selectable with no signal input displayed. 5. Select PICTURE COLOR TEMP CUSTO

20、M in the Advance menu, then press or ENTER button to display the equalizing window. Set all the values of OFFSET and GAIN in the window to zero. Caution: Before this performance, make a note of your customers adjustments, because the data is overwritten. 6. Perform all adjustments from the FACTORY M

21、ENU. Perform the following operations to display the FACTORY MENU. a. Press the MENU button of remote control to display the Easy menu. (If the Advance menu appears, move to the Easy menu from EASY MENU.) b. Select the RESET in the Easy menu, and then press the or ENTER button. c. Next, press the RE

22、SET button one time. And hold the RESET button for 3 seconds or more (the FACTORY MENU will appear). a. Press the / / button of the projec- tor to display the Easy menu. (If the Advance menu appears, move to the Easy menu from EASY MENU.) b. Select the RESET in the Easy menu, and then press the butt

23、on. c. Next, press the button one time. And repress and hold the button together with the INPUT button for 3 seconds or more (the FACTORY MENU will appear). 6 4-4 Ghost adjustment Signals for internal adjustment 30% 112/255 30% 0/255 Adjustment procedure 1. Make this adjustment after completing the

24、adjustment in 4-3. 2. Choose Advance menu OPTION SERVICE GHOST R,G and B, and set them to zero. 3. Use DAC-P - GHOST - R: in the FACTORY MENU 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 vertica

25、l line, reduce the value by 4 steps.) 4. In the same way, use DAC-P - GHOST-G: in the FACTORY MENU to adjust so that G color ghost is at a minimum. 5. In the same way, use DAC-P - GHOST-B: in the FACTORY MENU to adjust so that B color ghost is at a minimum. 4-2 Convergence adjustment Signal pattern

26、for internal adjustment Adjustment procedure 1. Open FACTORY MENU and then select OPTION CNV-V. Use R and/or B so that three colors of images can be converged at center, top and bottom of the screen. 2. In the same way, select OPTION CNV-H and use R and/or B so that three colors of images can be con

27、verged at center, left and right of the screen. 4-3 E-POS adjustment(vertical bars adjustment) Signal pattern for internal adjustment 112/255 Adjustment procedure 1. Make this adjustment after completing the adjustment 4-2 Convergence adjustment. 2. Choose Advance menu OPTION SERVICE GHOST R,G and B

28、, and set them to zero. 3. Open FACTORY MENU. Select DAC-P E-POS R and use it so that vertical bars can disappear. 4. In the same way, select DAC-P E-POS G and use it so that vertical bars can disappear. 5. In the same way, select DAC-P E-POS B and use it so that vertical bars disappear. 7 4-5 Flick

29、er adjustment (V.COM adjustment) Signals for internal adjustmentAdjustment procedure 1. Make this adjustment after completing the adjustment in 4-4 Ghost adjustment. 2. 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 th

30、e 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 FACTORY MENU to adjust the G color flicker. 4. In the same way, use DAC-P - V.COM-B: in t

31、he FACTORY MENU to adjust the B color flicker. 4-7 White balance adjustment (visual inspection) Preparations 1. Perform these adjustments after the NRSH adjustment described in Section 4-6. 2. Reset gamma correction before adjustment. Place the cursor on GAMMA in the FACTORY MENU, press the RESET ke

32、y and select DEFAULT. Adjustment procedure 1. First, adjust the G color. 2. Select GAMMA, SUB-CNT, and G: in the FACTORY MENU. If the background is white solid, press the ENTER key on the Remote control transmitter to change to G monochrome in the 33-tone grayscale. 3. Adjust GAMMA, SUB-CNT, and G:

33、in the FAC- TORY MENU so that brightness of 33 steps is best. 4. Dont adjust GAMMA, SUB-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, SUB-CNT, and G: in the FACTORY MENU. If the background is white solid, press the E

34、NTER key on the Remote control trasmitter to change to W monochrome in the 33-tone grayscale. 7. Adjust GAMMA, SUB-BRT, R: and B: in the FACTORY MENU so that low-brigtness white balance is best. 8. Adjust GAMMA, SUB-CNT, R: and B: in the FACTORY MENU so that middle-brightness white balance is best.

35、9. Repeat steps 7 to 8 above, and adjust so that brightness white balance of 33 steps is best. 4-6 NRSH adjustment (vertical stripe adjustment) Signals for internal adjustment 64 /255 88 /255 112 /255 136 /255 160 /255 160 /255 136 /255 112 /255 88 /255 64 /255 Adjustment procedure 1. Make this adju

36、stment after completing the adjustment in 4-5 Flicker adjustment. 2. Use DAC-P - NRSH - R: in the FACTORY MENU to adjust so that the vertical lines spaced every 6 dots are as inconspicuous as possible. (Reduce the adjustment value when black stripes appear in the 2nd or 3rd tone from the black side.

37、 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 incon- spicuous as possible.) 3. In the same way, use DAC-P - NRSH - G: in the FACTORY MENU to adjust vertical stripes of G col

38、or. 4. In the same way, use DAC-P - NRSH - B: in the Adjustment menu to adjust vertical stripes of B color. Press ENTER key 8 VID-AD MIN MID-L MID-H MAX DAC-P GAMMA C. UNIF. No. 1R 0 STRIPE OPTION C.UNIF ON/OFFON OFF G 0B 0 Major adjustment lattice point No. 4-8 Color uniformity adjustment Preparati

39、ons 1. Perform these adjustments after the white balance adjustment described in Section 4-7. 2. Make a color uniformity adjustment for the follow- ing four tones. MIN tone (approx. 4% input signal) MID-L tone (approx. 14% input signal) MID-H tone (approx. 25% input signal) MAX tone (approx. 57% inp

40、ut signal) 3. Place the cursor on C.UNIF. in the FACTORY MENU and press the key. This displays the Adjust Tone menu at the bottom of the screen. To choose the tone to be adjusted, press the key and then use the or key. Select the major adjustment lattice point No. and color, and then adjust them. 4.

41、 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 n

42、umbers. 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 C.UNIF. in the Adjust Tone menu and press the key. The ON/OFF menu appears. Place the cursor on ON with the key and press the k

43、ey. To turn it on again, place the cursor on OFF and press the key. 7. Although this adjustment can also be made using internal signals, we will here use the ENTER key on the Remote control transmitter to select the following two signals. Solid monochrome adjustment color (use G color adjustment whe

44、n a color differential meter is used). Solid white (use for adjustment other than above). 8. Reset color-shading correction before adjust- ment. When 4 tones and all colors are to be reset, place the cursor on C.UNIF. in the FACTORY MENU, press the RESET key and select DEFAULT. When only 1 tone is t

45、o 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. FACTORY MENU Major adjustment lattice point position 1412 13 16 1517 648 213 759 1011 V/6 H/6H/3H/3H/6 V/3 V/3 V/6 Adjust tone menu 9 Adjustment proced

46、ure 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 not G monochrome, press the ENTER key on the Remote control transmitter to change to solid G monochrome. 3. Measure the illumination at adjustment points No. 2, No

47、.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 point have the aver- age 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 ENTER 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 the