Hitachi-EDX-31-EP-Service-Manual电路原理图.pdf
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT.Multimedia LCD ProjectorMarch 2008SM0313ED-X31EP(C14B-20)ED-X33EP(C14B-20)SERVICE MANUALBe sure to read this manual before servicing. To assure safety from fi 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.Caution1. 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 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 the power unit (circuit) or the power unit (ballast) after turning on the projector.4. Do not touch the exhaust 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 WarningWarningThe technical information and parts shown 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 these items, or grant permission for use to parties with such objectives. Forward all inquiries to Hitachi Ltd.1. Features - 22. Specifi cations - 23. Names of each part- 44. Adjustment-75. Troubleshooting - 146. Service points- 197. Wiring diagram- 348. Disassembly diagram - 439. Replacement parts list - 5110. RS-232C communication - 5211. Block diagram- 7212. Connector connection diagram- 7313. Basic circuit diagram - 74ContentsED-X31GEP(C14D-20)ED-X33GEP(C14D-20)2ED-X31E / ED-X33E (C14B-20)1. Features High Brightness Rich Connectivity Low Noise Powerful Sound 2. SpecificationsLiquidcrystalpanelDrive system TFT active matrixPanel size 1.6cm(0.63 type)Number of pixels 1024 (H) x 768 (V)Lamp 220W UHBComputersignalComputer IN1Video : Analog 0.7Vp-p(75 termination)H/V. sync. : TTL level (positive/negative)Composite sync. : TTL level2Computer OUTVideo:Analog 0.7Vp-p, 75 output impedance (positive)H/V. sync.: TTL level (positive/negative)Composite sync.: TTL levelVIDEOsignalVIDEO IN 1.0Vp-p (75 termination)S-VIDEO INY signal: 1.0±0.1Vp-p, (75 termination)C signal: 0.286±0.1Vp-p (NTSC burst signal, 75 termination)0.3±0.1Vp-p (PAL/SECAM burst signal, 75 termination)COMPONENTVIDEOY 1.0±0.1Vp-p, 75 termination (positive)CB/PB 0.7±0.1Vp-p, 75 termination (positive)CR/PR 0.7±0.1Vp-p, 75 termination (positive)AUDIOsignalAUDIO IN 1200mVrms, 47k or more (max. 2Vrms)AUDIO IN 2AUDIO IN 3 L/R 200mVrms, 47k or more (max. 2Vrms)AUDIO OUT output impedance 1k (max. 2Vrms)RS232CINPUT Hi: Max. 20V, Min. 2.6V Lo: Typ. 20.0V, Max. 0.8VOUTPUT Hi: Typ. 8.0V, Min. 5.0V Lo: Typ. 7.0V, Max. 5.0VUSB(Mouse)I/O Level(differential)Amplitude ofdifferential signal| (D+) - (D) | > 0.2VD+> 2.8V, D2.8V, D0.2VD+> 2.8V, D2.8V, D< 0.3VAmplitude ofsignalINPUT: “L” = 0.8V or less, “H” = 2.0V or moreOUTPUT: “L” = 0.3V or less, “H” = 2.8V 3.6VAudio output 10W x 1Power supply AC100120V/3.5A, AC220240V/1.5APower consumption 320WDimensions 340 (W) x 100 (H) x 270 (D) mm (Not including protruding parts)Weight 3.5kgTemperature rangeOperation : 535°CStorage : -2060°CAccessoriesRemote control x1RGB cable x 1Power cords x 2Batteries x 2Users manuals x 1LENS CAP and STRAP x 1Audio/Video cable x 14ED-X31E / ED-X33E (C14B-20)3. Names of each partProjector(1) Lamp coverThe lamp unit is inside.(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 coverThe air filter and intake vent are inside.(12) Speaker(13) Exhaust vent(14) AC inlet(15) Power switch(16) Rear panel(17) Security bar(18) Security sloty HOT! : Do not touch around the lamp cover and the exhaust vents during use or just after use, since it is too hot.y Do not look into the lens or vents while the lamp is on, since the strong light is not good for your eyes.y Do not handle the elevator buttons without holding the projector, since the projector may drop down.WARNINGy 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 periodically.y Do not use the security bar and slot to prevent the projector from falling down, since it is not designed for it.CAUTIONHOT!(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!5ED-X31E / ED-X33E (C14B-20)Control panel(1) STANDBY/ON button(2) INPUT button(3) MENU buttonIt consists of four cursor buttons.(4) POWER indicator(5) TEMP indicator(6) LAMP indicatorRear 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 (7) Shutdown switchy 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 port (13) AUDIO IN3 (L,R) ports (8) (4) (5) (6) (7)(9) (13) (12) (3)(11) (10) (2)(1)6ED-X31E / ED-X33E (C14B-20)Remote controlWARNING y 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 y Note that the laser 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.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) x /z / /y cursor buttons(23) ENTER button(24) ESC button(25) RESET button(26) Battery coverBack 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)VIDEO DOC.CAMERAKEYSTONEASPECT SEARCH BLANKMUTEMY BUTTONPOSITION12ESCENTERMENURESETCOMPUTERMY SOURCE/AUTOR007MAGNIFY PAGEUPVOLUMEDOWNoONOFF9×FREEZE7ED-X31E / ED-X33E (C14B-20)4. Adjustment4-1 Before adjusting4-1-1 Selection of adjustmentWhen 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 adjustmentReplacedpartAdjustmentFlicker(Chap.4-2)Ghost(Chap.4-3)DC OFF (Chap.4-4)E-POS(Chap.4-5)Whitebalance(Chap.4-6)Coloruniformity(Chap.4-7)Dichroicoptics unitLCD/LENSprismassemblyPWBassemblyMainLampunitassembly: means need for adjustment. : means not need for adjustment.: means recommended.4-1-2 Setting of condition before adjustments1. 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 Zoom 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 adjustmentsPress 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 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 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 button 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 menu, 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). 8ED-X31E / ED-X33E (C14B-20)4-3 Ghost adjustmentTest pattern for the adjustmentAdjustment procedure1. 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 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 Flicker adjustment (V.COM adjustment)Test pattern for the adjustment Adjustment procedure1. 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 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 adjustmentAdjustment procedure1. Make this adjustment after completing the ad-justment in the section 4-3.2. Use STRIPE - DCOFF - No. 0 - R : in the FACTO-RY MENU 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.Press ENTER key30%30%0/255112/25564/25588/255112/255136/255160/255160/255136/255112/25588/25564/255128/2559ED-X31E / ED-X33E (C14B-20)4-6 White balance adjustment (visual inspection)Preparations1. Perform these adjustments after the adjust-ments described in Section 4-5.2. Reset gamma correction before adjustment.Place the cursor on GAMMA in the FACTORY MENU, press the RESET key and select RESET.Adjustment procedure1. 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: 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 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 GAMMA, 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.4-5 E-POS adjustment (vertical bars adjustment 2)Test pattern for the adjustment Adjustment procedure1. Make this 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 - Gand use it so that vertical bars are minimized.4. In the same way, select DAC-P - E-POS - Band use it so that vertical bars are minimized.112/25510ED-X31E / ED-X33E (C14B-20)VID-ADMINMID-1MID-2 . 6MAXDAC-PGAMMAC. UNIF.No. 1 R 0STRIPEOPTIONC.UNIFON/OFF ONOFFG 0 B 0Major adjustment lattice point No.4-7 Color uniformity adjustmentsPreparations1. Perform these adjustments after 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)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 (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 controls the brightness of the entire screen.6. To temporarily turn correction off, place the cur-sor 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 key. To turn it on again, place the cursor on OFF and press the key.7. Although
