Hitachi CP-RX78 Service Manual
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Hitachi CP-RX78 Service Manual

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See also: Operating Manual , User Manual

SERVICE MANUAL

Warning
The 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 Consumer Electronics Co., Ltd.
Be 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.
1. When replace the lamp, to avoid burns to your fi ngers. The lamp becomes too 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
power unit (circuit) and power unit (ballast), after 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 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.
1. Features ------------------------------------------------------ 2
2. Specifi cations ----------------------------------------------- 2
3. Names of each part ---------------------------------------- 3
4. Adjustment --------------------------------------------------- 4
5. Troubleshooting ------------------------------------------ 10
6. Service points --------------------------------------------- 14
7. Wiring diagram -------------------------------------------- 30
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT.
Multimedia LCD Projector
YK
Caution
Service Warning
Contents
8. Disassembly diagram ----------------------------------- 36
9. Replacement parts list ---------------------------------- 45
10. Block diagram --------------------------------------------- 46
11. Connector connection diagram ----------------------- 47
12. Basic circuit diagram ------------------------------------ 48
July 2009
No.0628E
CP-RX78
(C15-20EE)

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  • Page 1: Table Of Contents

    Be 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.

  • Page 2: Features

    CP-RX78 ( C15-20EE ) 1. Features • High Brightness • Low Noise 2. Specifications Drive system TFT active matrix Liquid crystal Panel size 1.6cm(0.63 type) panel Number of pixels 1024 (H) x 768 (V) Lamp 190W UHP Video : Analog 0.7Vp-p(75Ω termination)

  • Page 3: Names Of Each Part

    CP-RX78 ( C15-20EE ) 3. Names of each part Projector Control panel HOT! (2) (3) (1) Lamp cover (1) STANDBY/ON button The lamp unit is inside. (2) INPUT button (2) Focus ring (3) MENU button (3) Zoom ring It consists of four cursor buttons.

  • Page 4: Adjustment

    CP-RX78 ( C15-20EE ) 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 adjustment Adjustment...
  • Page 5 CP-RX78 ( C15-20EE ) 4-2 LAMP FAN adjustment When you replaced the PWB assembly MAIN, Adjustment procedure 1. Open the FACTORY MENU and select the OP- make sure to carry out this adjustment after TION. completing reassembling the projector. 2. Press the [ ] (right) button, and then use the [ ]...
  • Page 6 CP-RX78 ( C15-20EE ) 4-5 PSIG adjustment (vertical bars adjustment) Test pattern for the adjustment Adjustment procedure 1. Make this adjustment after completing the ad- /255 justment in the section 4-4. /255 2. Use DAC - P_PSIG - R : in the FACTORY MENU and use it so that vertical bars are minimized.
  • Page 7 CP-RX78 ( C15-20EE ) 4-7 Color uniformity adjustments Preparations 1. Perform these adjustments after the adjustments 5. Adjustment point No.1 should not be adjusted, described in the section 4-6. because it controls the brightness of the entire 2. Make a color uniformity adjustments for the fol- screen.
  • Page 8 CP-RX78 ( C15-20EE ) Adjustment procedure 1 (When a color differential meter is used) Note: Since excessive correction may lead to a 1. First adjust the [MID-1] tone [G:]. correction data overview during internal 2. Select adjustment point [No.2][G:]. calculations, use the following values for When the background is not [G] monochrome, reference.
  • Page 9 CP-RX78 ( C15-20EE ) Adjustment procedure 2 (visual inspection) same color as measurement point [No.1]. 1. First adjust [MIN] tone [G:]. Adjustment technique: 2. Select [No.2] [G:]. First, adjust [B:] of the point whose color is to If the background is [G] monochrome, press the...

  • Page 10: Troubleshooting

    CP-RX78 ( C15-20EE ) 5. Troubleshooting Check points E800 E801 E301 E805 E807 E814 E802 E302 E806 P701 P501 P601 S801 IS02 Note CHH1C Dotted outlines in the picture above show components behind a metallic part (earth metal) or on the back side of the main board.
  • Page 11 CP-RX78 ( C15-20EE ) Power can not be turned on *: Be sure to unplug the power cord before measuring resistance. voltage supplied at pins (1) Measure resistance* 0Ω and (3) of E800 on the PWB between pins (1) and (3) of...
  • Page 12 CP-RX78 ( C15-20EE ) Lamp does not light *: Be sure to unplug the power cord before measuring resistance. What is the state of Light LAMP indicator D303 during operation? Is the LAMP installation install the Lamp correct? Not light...
  • Page 13 CP-RX78 ( C15-20EE ) Picture is not displayed when the RGB signal is input Confirm the splash screen the LCD Panels CPC40 connector and the user menu displayed connection to the MAIN correctly? board. PWB assembly MAIN LCD prism assembly...

  • Page 14: Service Points

    CP-RX78 ( C15-20EE ) 6. Service points 6-1 Lead free solder [CAUTION] This product uses lead free solder (unleaded) to help preserve the environment. Please read these instructions before attempting any soldering work. CAUTION Always wear safety glasses to prevent fumes or molten solder from getting into the eyes. Lead free solder can splatter at high temperatures (600˚C).
  • Page 15 CP-RX78 ( C15-20EE ) 6-2 Before Replacing The LCD Prism assembly You should not replace separately the parts of the LCD prism assembly. In case of a failure in any parts of LCD/PRISM assembly, replace the whole LCD/PRISM assembly. Do not disassemble the unit because replacement of separate parts is not possible.
  • Page 16 CP-RX78 ( C15-20EE ) (3) Disconnect the LCD panel flexible cables and unscrew PWB assembly MAIN to make it free. Remove these screws Flexible cables of LCD panel Remove there screws WARNING Never put the heavy stress to the main board.
  • Page 17 CP-RX78 ( C15-20EE ) 3. Maintenance point Actual formation Panel Optical Filter Each color part has similar construction.By using swab and air duster, you can easily remove dust from panel and optical filter. 4. Cleaning the panels and optical filters (1) Turn on the set and lit on the lamp.

  • Page 18: Putting Batteries

    If the flower adheres your body or clothes, rinse well with water immediately. • Obey the local laws on disposing the battery. • Use the batteries included in this product or two new batteries of the specified type: HITACHI MAXELL, part number LR6 or R6P.

  • Page 19: Air Filter

    CP-RX78 ( C15-20EE ) 6-5 Air filter Cleaning and replacing the air filter Please check and clean the air filter periodically. When the indicators or a message prompts you to clean the air filter, comply with it as soon as possible.
  • Page 20 CP-RX78 ( C15-20EE ) 6-6 Lamp WARNING HIGH VOLTAGE HIGH TEMPERATURE HIGH PRESSURE ● The projector uses a high-pressure mercury glass lamp. The lamp can break with a loud bang, or burn out, if jolted or scratched, handled while hot, or worn over time. Note that each lamp has a different life- time, and some may burst or burn out soon after you start using them.
  • Page 21 CP-RX78 ( C15-20EE ) Replacing the Lamp A lamp has finite product life. Using the lamp for long periods of time could cause the pictures darker or the color tone poor. Note that each lamp has a different lifetime, and some may burst or burn out soon after you start using them.

  • Page 22: Other Care

    CP-RX78 ( C15-20EE ) 6-7 Other care WARNING Before caring, make sure the power switch is off and the power cable is not plugged in, and then allow the projector to cool suffi ciently. The care in a high temperature state of the projector could cause a burn and/ or malfunction to the projector.
  • Page 23 CP-RX78 ( C15-20EE ) 6-8 Notice of AUTO adjustment Use of AUTO adjustment with the image through RGB input optimizes V_POSI, H_POSI, and H_PHASE automatically. In case that projected image has dark tone around its peripheral, AUTO operation sometimes makes artifacts in the image, shifts capture area and so on.
  • Page 24 CP-RX78 ( C15-20EE ) 6-9 How to inactivate the security functions This projector is equipped with security functions. (1)MyScreen PASSWORD The MyScreen PASSWORD function can be used to prohibit access to the MyScreen function and pre- vent the currently registered MyScreen image from being overwritten.
  • Page 25 PIN BOX (ID Inquiring Code) 2. Send HITACHI sales company the Inquiring code (10 digits) to inquire the correct PIN code. 3. With the PIN BOX menu displayed, input the correct PIN code. Enter the correct PIN CODE that HITACHI sales company informed.

  • Page 26: Related Messages

    CP-RX78 ( C15-20EE ) 6-11 Related Messages When the unit’s power is on, messages such as those shown below may be displayed. When any such message is displayed on the screen, please respond as described below. Although these messages will be automatically disappeared around several minutes, it will be reappeared every time the power is turned on.

  • Page 27: Regarding The Indicator Lamps

    CP-RX78 ( C15-20EE ) 6-12 Regarding the indicator lamps Lighting and flashing of the POWER indicator, the LAMP indicator, and the TEMP indicator have the meanings as described in the table below. Please respond in accordance with the instructions within the table.

  • Page 28: Startup Type

    AIR - SENSOR Execute this item to adjust the air sensor. STARTUP TYPE Select the startup screen type. 1 : shows Hitachi Logo 2 : No Hitachi Logo PANEL TIME Use time of LCD panel. Reset the PANEL TIME whenever you changed the LCD/LENS prism assembly panel.
  • Page 29 CP-RX78 ( C15-20EE ) 6-15 DIGITAL CONVERGENCE adjustment Preparation 1. Open the ADVANCED MENU and select OPTION → SERVICE → GHOST, and then press the ► (right) or the ENTER button to display the SERVICE_GOHST box. 2. While the RETURN is highlighted, operate the keypad or the remote control as follows. The DIGINAL CONVERGENCE box will appear.

  • Page 30: Wiring Diagram

    CP-RX78 ( C15-20EE ) 7. Wiring diagram...
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  • Page 35 CP-RX78 ( C15-20EE )

  • Page 36: Disassembly Diagram

    CP-RX78 ( C15-20EE ) 8. Disassembly diagram Remove UPPER CASE / PWB assembly MAIN PWB assembly MAIN Terminal reverse side Remove LAMP / DICHROIC OPTICS UNIT / LENS / SPEAKER Continued on next page...
  • Page 37 CP-RX78 ( C15-20EE ) Remove DUCT / FAN Remove POWER UNIT BLOCK / FOOT Remove PANEL DUCT / FAN / FILTER Remove POWER UNIT BALLAST / CIRCUIT...
  • Page 38 CP-RX78 ( C15-20EE ) Notice ■ Detach and attach the upper case. Follow the procedure below to detach and attach the upper case. When disassembling a. Remove the Lamp door. CAUTION The lamp door must be removed before the upper case when disassembling the machine. If the upper case is detached with the lamp door installed, the MAIN board might be damaged.
  • Page 39 CP-RX78 ( C15-20EE ) When assembling a. Tighten 8 screws on the bottom and 2 screws on the rear after attaching the upper case with the lamp door separated. CAUTION This is not a screw hole. Do NOT insert a screw or screwdriver into it to avoid damaging the in- side.
  • Page 40 CP-RX78 ( C15-20EE ) ■ Dettaching the MAIN board or INPUT board. 1. Remove screws from MAIN board and rear panel. Remove this screw Remove there screws Flexible cables of LCD panel CAUTION Never swing the screwdriver while you loosen this screw.
  • Page 41 CP-RX78 ( C15-20EE ) ■ Attaching the MAIN board. Assemble in reverse order of the disassembling procedure described in the last section. Use specified type of screws when re-assemblimg. Screw down the MAIN board together with the F-guard earth metal.
  • Page 42 CP-RX78 ( C15-20EE ) ■ Attaching/detaching the LCD prism assembly CAUTION Please handle the LCD prism assembly with care in order not to make the convergence worse. Loosen/tighten three screws. Never let the screw driver touch the LCD prism assembly when you attach/detach the LCD prism assembly.
  • Page 43 CP-RX78 ( C15-20EE ) ■ Detach and attach the lens assembly. In some of the projectors, a few of metallic spacers are installed between the lens assembly and the dichroic optics unit. Never detach the lens assembly except when you replace it because the spacers will come off.
  • Page 44 CP-RX78 ( C15-20EE ) ■ Power unit block 1. Attachching / Detaching the power unit block. Power unit block AC inlet Screw Screw Put the power shield metal inside the bottom case when attaching the power unit block to the bottom case.

  • Page 45: Replacement Parts List

    CP-RX78 ( C15-20EE ) 9. Replacement Parts list PRODUCT SAFETY NOTE : Components marked with a have special characteristics important to safety. Before replacing any of there components, read carefully, the PRODUCT SAFETY NOTICE of this Service Manual. Don't degrade the safety of the projector through improper servicing.

  • Page 46: Block Diagram

    CP-RX78 ( C15-20EE ) 10. Block diagram...

  • Page 47: Connector Connection Diagram

    CP-RX78 ( C15-20EE ) 11. Connector connection diagram...

  • Page 48: Basic Circuit Diagram

    CP-RX78 ( C15-20EE ) 12. Basic circuit diagram Parts with hatching are not mounted. CONFIDENTIAL DOWN 56.9KHz I002 I001 KSM-2003LM2EL KSM-2003LM2EL Vout Vout C012 C002 100p-C 100p-C 1005 1005 C011 C001 1.0/10 1.0/10 APRC01 APRC02 APRC03 APRC04 PWB assembly REMOTE...
  • Page 49 CP-RX78 ( C15-20EE ) CONFIDENTIAL POWER UNIT (BALLAST) 1...
  • Page 50 CP-RX78 ( C15-20EE ) CONFIDENTIAL POWER UNIT (BALLAST) 2...
  • Page 51 CP-RX78 ( C15-20EE ) CONFIDENTIAL POWER UNIT CIRCUIT...
  • Page 52 CP-RX78 ( C15-20EE ) CONFIDENTIAL PWB assembly MAIN 1...
  • Page 53 CP-RX78 ( C15-20EE ) CONFIDENTIAL L251 I201 1608 SHEET_2,3 RESETN 3.3V PW190 R204 2.5V 1005 R203 AC15 AC15 1.0k R217 AE16 AE16 E251 1005 Q201 AF16 AF16 WR-60VS(H30) C273 JUMPER R RT1N141U 凸2010 AC16 AC16 R201 N251 AD15 0.01/16 AD15...
  • Page 54 CP-RX78 ( C15-20EE ) CONFIDENTIAL PWB assembly MAIN 3...
  • Page 55 CP-RX78 ( C15-20EE ) CONFIDENTIAL PWB assembly MAIN 4...
  • Page 56 CP-RX78 ( C15-20EE ) CONFIDENTIAL TG part for B5 ， B6 I401 CXD3540AGB CXD3540GB 3/3 from I808 L401 I401 controlled by POWER5 CXD3540AGB I401 1.8V 2518 CXD3540AGB VDDI-D4 CXD3540GB 1/3 +1.8VP VSS-A1 SHEET_4 CXD3540GB 2/3 VDDI-D7 VSS-A2 R401 R431 VDDI-D8...
  • Page 57 CP-RX78 ( C15-20EE ) C15 R Panel Part CONFIDENTIAL for B5 ， B6 XGA from I802 from I801 controlled by POWER6 controlled by POWER7 R534 1005 Q533 R531 2SC4617 R545 R538 1005 GCFB_R SHEET_5 GCFB_R SHCLK_R SHEET_5 1005 R532 1005...
  • Page 58 CP-RX78 ( C15-20EE ) CONFIDENTIAL C15 G Panel Part for B5 ， B6 XGA from I802 from I801 controlled by POWER6 controlled by POWER7 R634 1005 Q633 2SC4617 R631 R645 R638 1005 GCFB_G SHEET_5 SHEET_5 GCFB_G SHCLK_G R632 RESETSH 1005...
  • Page 59 CP-RX78 ( C15-20EE ) CONFIDENTIAL C15 B Panel Part for B5 ， B6 XGA from I801 from I802 controlled by POWER7 controlled by POWER6 R734 1005 Q733 2SC4617 R731 R745 R738 1005 GCFB_B SHEET_5 GCFB_B SHCLK_B SHEET_5 R732 RESETSH 1005...
  • Page 60 CP-RX78 ( C15-20EE ) CONFIDENTIAL PWB assembly MAIN 9...
  • Page 61 CP-RX78 ( C15-20EE ) CONFIDENTIAL PWB assembly MAIN 10...
  • Page 62 CP-RX78 ( C15-20EE ) CONFIDENTIAL PWB assembly MAIN 11...
  • Page 63 CP-RX78 ( C15-20EE ) CONFIDENTIAL PWB assembly MAIN 12...
  • Page 64 CP-RX78 ( C15-20EE ) CONFIDENTIAL PWB assembly MAIN 13...
  • Page 65 CP-RX78 ( C15-20EE ) Basic circuit diagram list PWB assembly REMOTE PWB assembly MAIN 6 POWER UNIT BALLAST 1 PWB assembly MAIN 7 POWER UNIT BALLAST 2 PWB assembly MAIN 8 POWER UNIT CIRCUIT PWB assembly MAIN 9 PWB assembly MAIN 1...
  • Page 66 CP-RX78 YK No.0628E QR78621...

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C15-20ee

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