Hitachi-EDX-31-GEP-Service-Manual(1) 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 March 2008 SM0313 ED-X31EP(C14B-20) ED-X33EP(C14B-20)SERVICE MANUAL Be sure to read this manual before servicing. To assure safety from fi re, electric shock, injury, harmful radiation and materials, various mea

2、sures 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 replacing the lamp, avoid burns to your fi ngers, the lamp becomes very hot. 2. Never touch the lamp bulb with a fi nger or anyth

3、ing 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 the power unit (circuit) or the power unit (ballast) after turning on the projector. 4. Do not touch the exhaust

4、 fan during operation. 5. The LCD module assembly 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 as specifi ed. Service Warning Warning The technical information and parts s

5、hown in this manual are not to be used for: the 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 th

6、ese items, or grant permission for use to parties with such objectives. Forward all inquiries to Hitachi Ltd. 1. Features - 2 2. Specifi cations - 2 3. Names of each part- 4 4. Adjustment-7 5. Troubleshooting - 14 6. Service points- 19 7. Wiring diagram- 34 8. Disassembly diagram- 43 9. Replacement

7、parts list- 51 10. RS-232C communication - 52 11. Block diagram- 72 12. Connector connection diagram- 73 13. Basic circuit diagram- 74 Contents ED-X31GEP(C14D-20) ED-X33GEP(C14D-20) RadioFans.CN 收音机爱 好者资料库 2 ED-X31E / ED-X33E (C14B-20) 1. Features High Brightness Rich Connectivity Low Noise Powerful

8、 Sound 2. Specifications Liquid crystal panel Drive systemTFT active matrix Panel size1.6cm(0.63 type) Number of pixels1024 (H) x 768 (V) Lamp220W UHB Computer signal Computer IN 1 Video : Analog 0.7Vp-p(75? termination) H/V. sync. : TTL level (positive/negative) Composite sync. : TTL level 2 Comput

9、er OUT Video:Analog 0.7Vp-p, 75? output impedance (positive) H/V. sync.: TTL level (positive/negative) Composite sync.: TTL level VIDEO signal VIDEO IN1.0Vp-p (75? termination) S-VIDEO IN Y signal: 1.00.1Vp-p, (75? termination) C signal: 0.2860.1Vp-p (NTSC burst signal, 75? termination) 0.30.1Vp-p (

10、PAL/SECAM burst signal, 75? termination) COMPONENT VIDEO Y1.00.1Vp-p, 75? termination (positive) CB/PB0.70.1Vp-p, 75? termination (positive) CR/PR0.70.1Vp-p, 75? termination (positive) AUDIO signal AUDIO IN 1 200mVrms, 47k? or more (max. 2Vrms) AUDIO IN 2 AUDIO IN 3 L/R200mVrms, 47k? or more (max. 2

11、Vrms) AUDIO OUToutput impedance 1k? (max. 2Vrms) RS232C INPUTHi: Max. 20V, Min. 2.6VLo: Typ. 20.0V, Max. 0.8V OUTPUTHi: Typ. 8.0V, Min. 5.0VLo: Typ. 7.0V, Max. 5.0V USB (Mouse) I/O Level (differential) Amplitude of differential signal | (D+) - (D) | 0.2V D+ 2.8V, D 2.8V, D 0.2V D+ 2.8V, D 2.8V, D 0.

12、3V Amplitude of signal INPUT: “L” = 0.8V or less, “H” = 2.0V or more OUTPUT: “L” = 0.3V or less, “H” = 2.8V 3.6V Audio output10W x 1 Power supplyAC100120V/3.5A, AC220240V/1.5A Power consumption320W Dimensions340 (W) x 100 (H) x 270 (D) mm (Not including protruding parts) Weight3.5kg Temperature rang

13、e Operation : 535C Storage : -2060C Accessories Remote control x1 RGB cable x 1 Power cords x 2 Batteries x 2 Users manuals x 1 LENS CAP and STRAP x 1 Audio/Video cable x 1 RadioFans.CN 收音机爱 好者资料库 4 ED-X31E / ED-X33E (C14B-20) 3. Names of each part Projector? (1) Lamp cover The lamp unit is inside.

14、(2) Focus ring (3) Zoom ring (4) Control panel (5) Elevator buttons (x 2) (6) Elevator feet (x 2) (7) Remote sensor (8) Lens (9) Lens cover (10) Intake vents (11) Filter cover The air filter and intake vent are inside. (12) Speaker (13) Exhaust vent (14) AC inlet (15) Power switch (16) Rear panel (1

15、7) Security bar (18) Security slot ?HOT! : Do not touch around the lamp cover and the exhaust vents during use or just after use, since it is too hot. ?Do not look into the lens or vents while the lamp is on, since the strong light is not good for your eyes. ?Do not handle the elevator buttons witho

16、ut holding the projector, since the projector may drop down. WARNING ?Maintain normal ventilation to prevent the projector from heating up. Do not cover, block or plug up the vents. Do not place anything that can stick or be sucked to the vents, around the intake vents. Clean the air fi lter periodi

17、cally. ?Do not use the security bar and slot to prevent the projector from falling down, since it is not designed for it. CAUTION HOT! (1)(2)(3)(4) (7) (10) (9) (8) (11) (6) (5) (13) (12) (6) (6) (6) (18) (16) (17) (15) (14) (4) (13) (1) (10) (11) HOT! 5 ED-X31E / ED-X33E (C14B-20) Control panel (1)

18、 STANDBY/ON button (2) INPUT button (3) MENU button It consists of four cursor buttons. (4) POWER indicator (5) TEMP indicator (6) LAMP indicator Rear panel (1)(2)(3) (4) (6) (5) (1) AUDIO IN1 port (2) AUDIO IN2 port (3) AUDIO OUT port (4) COMPUTER IN1 port (5) COMPUTER IN2 port (6) MONITOR OUT port

19、 (7) Shutdown switch ?Use the shutdown switch only when the projector is not turned off by normal procedure, since pushing this switch stops operation of the projector without cooling it down. CAUTION (8) CONTROL port (9) USB port (10) COMPONENT (Y, Cb/Pb, Cr/Pr) ports (11) VIDEO port (12) S-VIDEO p

20、ort (13) AUDIO IN3 (L,R) ports (8)(4)(5)(6)(7) (9)(13)(12)(3)(11)(10)(2) (1) 6 ED-X31E / ED-X33E (C14B-20) Remote control WARNING ?Do not look into the beam outlet and point the beam at people and pets while pressing the LASER button, since the beam is not good for eyes. CAUTION ?Note that the laser

21、 beam may result in hazardous radiation exposure. Use the laser pointer only for pointing on the screen. (1) VIDEO button (2) COMPUTER button (3) SEARCH button (4) STANDBY/ON button (5) ASPECT button (6) AUTO button (7) BLANK button (8) MAGNIFY - ON button (9) MAGNIFY - OFF button (10) MY SOURCE/DOC

22、.CAMERA button (11) VOLUME - button (12) PAGE UP button (13) PAGE DOWN button (14) VOLUME + button (15) MUTE button (16) FREEZE button (17) MY BUTTON - 1 button (18) MY BUTTON - 2 button (19) KEYSTONE button (20) POSITION button (21) MENU button (22) ?/?/?/? cursor buttons (23) ENTER button (24) ESC

23、 button (25) RESET button (26) Battery cover Back of the remote control (2) (1) (6) (5) (16) (8) (9) (19) (17) (20) (22) (24) (10) (4) (3) (7) (12) (14) (11) (13) (15) (18) (21) (23) (25) (26) VIDEODOC.CAMERA KEYSTONE ASPECTSEARCHBLANK MUTEMY BUTTON POSITION 12 ESC ENTER MENU RESET COMPUTER MY SOURC

24、E/ AUTO R007 MAGNIFYPAGE UP VOLUME DOWN ? ON OFF ? FREEZE 7 ED-X31E / ED-X33E (C14B-20) 4. Adjustment 4-1 Before adjusting 4-1-1 Selection 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 ad

25、justment Replaced part Adjustment Flicker (Chap.4-2) Ghost (Chap.4-3) DC OFF (Chap.4-4) E-POS (Chap.4-5) White balance (Chap.4-6) Color uniformity (Chap.4-7) Dichroic optics unit LCD/LENS prism assembly PWB assembly Main Lamp unit assembly : means need for adjustment. : means not need for adjustment

26、. : means recommended. 4-1-2 Setting of condition before adjustments 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 TURN ON to TURN OFF, set to the TURN ON after adjustment. 2. Set Zoo

27、m Wide to Max. And project an image with more than 1m (40 inches) in diagonal size. 3. Set the lens position to the center, using horizontal and vertical lens shift dials. 4. Normalizing the video adjustments Press the MENU button to display the EASY menu. If Advanced menu comes up, move to the Easy

28、 menu. Select the RESET in the EASY menu and press the or ENTER button to open the RESET dia- log. Choose the EXECUTE with the button. Note that the projector will not allow you to reset its adjustment values with no signal input. 5. Perform all adjustments from the FACTORY MENU. Operate as follows

29、to display the FAC- TORY MENU. When you use the remote control. a. Press the MENU button of the remote con- trol to display the Easy menu. (If the Ad- vanced menu appears, move to the Easy menu.) b. Select the RESET in the Easy menu, and then press the or ENTER button. c. Next, press the RESET butto

30、n one time. And hold the RESET button for 3 seconds or lon- ger (the FACTORY MENU will appear). When you use the keypad of the projector. a. Press the , , or button of the pro- jector to display the Easy menu. (If the Ad- vanced menu appears, move to the Easy menu.) b. Select the RESET in the Easy m

31、enu, and then press the or ENTER button. c. Next, press the button one time. And re- press and hold the button together with the INPUT button for 3 seconds or more (the FACTORY MENU will appear). 8 ED-X31E / ED-X33E (C14B-20) 4-3 Ghost adjustment Test pattern for the adjustment Adjustment procedure

32、1. Make this adjustment after completing the ad- justment in the section 4-2. Set 0 to the GHOST R, G, B in OPTION-SERVICE- GHOST Menu. 2.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

33、 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. 4-2

34、 Flicker adjustment (V.COM adjustment) Test pattern for the adjustmentAdjustment 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, ad

35、just 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

36、on the left some- times has a horizontal line across the screen. 4-4 DC OFF adjustment (vertical bars adjustment 1) Test pattern for the adjustment Adjustment procedure 1. Make this adjustment after completing the ad- justment in the section 4-3. 2.Use STRIPE - DCOFF - No. 0 - R : in the FACTO- RY M

37、ENU and use it so that vertical bars are min- imized. 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. Pres

38、s ENTER key 30% 30% 0/255 112/255 64 /255 88 /255 112 /255 136 /255 160 /255 160 /255 136 /255 112 /255 88 /255 64 /255 128/255 9 ED-X31E / ED-X33E (C14B-20) 4-6White balance adjustment (visual inspection) Preparations 1. Perform these adjustments after the adjust- ments described in Section 4-5. 2.

39、 Reset gamma correction before adjustment. Place the cursor on GAMMA in the FACTORY MENU, press the RESET key and select RESET. 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

40、control transmitter to change to G monochrome in the 33-tone grayscale. 3. Adjust GAMMA, SUB-CNT, and G: 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 an

41、d B. 6.Select GAMMA, SUB-CNT, and G: in the FACTORY MENU. If the background is white solid, press the ENTER key on the remote control 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-brightness white balance is best. 8. Adjust GA

42、MMA, SUB-CNT, R: and B: in the FACTORY MENU so that middle-brightness white balance is best. 9. Repeat steps 7 to 8 above, and adjust so that brightness white balance of 33 steps is best. 4-5E-POS adjustment (vertical bars adjustment 2) Test pattern for the adjustmentAdjustment procedure 1. Make thi

43、s adjustment after completing the ad- justment in the section 4-4. 2.Use DAC -P - E-POS - R in the FACTORY MENU and use it so that vertical bars are minimized. 3. In the same way, select DAC-P - E-POS - G and use it so that vertical bars are minimized. 4. In the same way, select DAC-P - E-POS - B an

44、d use it so that vertical bars are minimized. 112/255 10 ED-X31E / ED-X33E (C14B-20) VID-AD MIN MID-1 MID-2 . 6 MAX DAC-P GAMMA C. UNIF. No. 1R 0 STRIPE OPTION C.UNIF ON/OFFON OFF G 0B 0 Major adjustment lattice point No. 4-7 Color uniformity adjustments Preparations 1.Perform these adjustments afte

45、r the adjustments described in the section 4-6. 2. Make a color uniformity adjustments for the fol- lowing tones. MIN tone (approx. 7% input signal) MID-1 tone (approx. 14% input signal) MID-2 tone (approx. 21% input signal) MID-3 tone (approx. 29% input signal) MID-4 tone (approx. 36% input signal)

46、 MID-5 tone (approx. 50% input signal) MID-6 tone (approx. 61% input signal) MAX tone (approx. 75% input signal) NOTE: The brightness level of the test patterns in MID-4 and MID-6 is selectable. 3. Select the C.UNIF. in the FACTORY MENU and press the key. This operation displays the Adjust Tone menu

47、 (shown below) on 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. The major adjustment lattice point numbers (a total of 17 points) corresponds to the major ad- justment 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