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CONTENTS... 2004 LCD Projection Television InformationINSTRUCTOR Alvie Rodgers C.E.T. (Chamblee, GA.)

January 2004 (ver b) Training Materials Prepared by: ALVIE RODGERS C.E.T.

2003 / 2004

MODEL RELEASE

LCD PROJECTION

TELEVISION

http://www.hitachiserviceusa.com

Model Number Chassis Num

50V500 LC-37

50V500A LC-37E

60V500A LC-37F

50VX500 LC-37E

60VX500 LC-37B

50VX500A LC-37E

60VX500A LC-37F


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LCD TABLE OF CONTENTS

Table of Contents Page 1

January 2004 (ver b)Materials prepared by

Alvie Rodgers C.E.T.

TOPICS PAGE

Continued on Next Page

SECTION (1) TOP REMOVAL PROCEDURE:

Top Removal Procedure ----------------------------------------------------------------------------------------- 01-01

SECTION (2)ENGINE REMOVAL PROCEDURE:Engine Removal Procedure ------------------------------------------------------------------------------------------ 02-01

SECTION (3) POWER SUPPPLY INFORMATION:

Power Supply PWB Board Layout --------------------------------------------------------------------------------- 03-01

Power Supply Shut Down Circuit Diagram ----------------------------------------------------------------------- 03-02

Power Supply Protect Switch and Protect Switch 2 Circuit Diagram Explained ------------------------- 03-03

SECTION (4) VIDEO CIRCUIT INFORMATION:

Video NTSC Circuit Diagram --------------------------------------------------------------------------- 04-01

Component Video Circuit Diagram --------------------------------------------------------------------- 04-02

SECTION (5) PWB FUNCTION:

Front Control and Signal PWB ------------------------------------------------------------------------------------- 05-01

Power Supply, Flex Converter, Digital Module, Digital Power Supply ------------------------------------- 05-02

LCD Panel R, G and B, Audio PWB, Memory Card Reader, Lamp Ballast,

Temp Sensor PWB, Door Switch PWB, and DVI PWB ----------------------------------------------------- 05-03

SECTION (6) LAMP REPLACEMENT PROCEDURE:

Lamp Replacement and Removal Procedure ------------------------------------------------------------------ 06-01

SECTION (7) KNOWN FAILURES AND FIXES:

Shadows in the Bottom Corners ------------------------------------------------------------------------------------ 07-01

Shadows in the Bottom Corners Fix ------------------------------------------------------------------------------- 07-02

Ghost Adjustment 50V500 Model Only --------------------------------------------------------------------------- 07-03

Ghost Adjustment All but the 50V500 Model -------------------------------------------------------------------- 07-05Pink Picture All but the 50V500 Model --------------------------------------------------------------------------- 07-07

Picture look Mosaic or Overshoots --------------------------------------------------------------------- 07-07

Pink Picture 50V500 Model Only ---------------------------------------------------------------------------------- 07-08

Engine Packing Instructions (For returned Engines) and Engine Part Numbers ---------------------------- 07-09

Saving Changed Data in the I2C Service Menu ------------------------------------------------------------------ 07-10

Front LEDs Blinking ------------------------------------------------------------------------------------------------- 07-10

Speaker Grill May Appear Bumpy --------------------------------------------------------------------------------- 07-10

Minimum Wall Clearance ------------------------------------------------------------------------------------------- 07-10

Fan Sounds (Includes Fan Part Numbers -------------------------------------------------------------------------- 07-11

Bottom Fan Filter can be Accidentally Pushed up against the Fan ------------------------------------------- 07-12

Black Side Panels on Picture Turn Off Automatically ---------------------------------------------------------- 07-13

Ghost Only On Tex for Subtitles for a DVD Player ------------------------------------------------------------- 07-13

Lines in the Picture, Abnormalities, May be intermittent ------------------------------------------------------ 07-13Ribbon Locking Mechanism to Flex Converter My be Unseated or Missing ------------------------------- 07-14

SECTION (8) SERVICE POLICY AND PROCEDURES:

Service Policy----------------------------------------------------------------------------------------------------- 08-01

PWB Return Form ---------------------------------------------------------------------------------------------- 08-02


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LCD PROJECTION

TRAINING PACKAGE

LCD CABINET

TOP REMOVAL

PROCEDURE

SECTION 1


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LCD PROJECTION CABINET TOP REMOVAL PROCEDURE

PAGE 01-01

Pop off front speaker grill.

Remove 4 screws holding plastic piece with power button.

Step

1

Step

2


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PAGE 01-02

Left side close up view.

Right side close up view.

Step

2

Step2


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PAGE 01-03

Remove 4 screws holding top cabinet front.

Left side close up view.

Step

3

Step

3


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PAGE 01-04

Right side close up view.

Remove screws holding lower rear cabinet.

Step

4

Step

3


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PAGE 01-06

Pull out subwoofer as shown, to access the upper cabinet wires.

Disconnect all the wires

Step

8

Step

7


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PAGE 01-07

Now lift the top straight up. (2 person lift!)

Lens Assembly shown with Top and Grey plastic cover Removed.

Reassembly in the reverse order

Step

9

Step

9


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LCD PROJECTION

TRAINING PACKAGE

LCD ENGINE

REMOVAL

PROCEDURE

SECTION 2


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LCD PROJECTION ENGINE REMOVAL PROCEDURE

PAGE 02-01

Bracket Removed

Follow Steps 1 through 9 on LCD Projection Removing Top Cabinet Procedure

Step

10

Remove this Bracket.

Step

10


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PAGE 02-02

Remove the Ballast Assembly.

Remove Lamp Switch PWB.

Step

12

Step11


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PAGE 02-03

Remove Lamp Power Connector retaining bracket, then Lamp Power Connector.

Remove Fan Exhaust Housing (back screw is hidden in this view).

Step

14

Step

13


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PAGE 02-04

Another view of Fan Exhaust housing, showing back screw.

Remove the 5 screws holding down the Engine Assembly.Use a stubby #2 Philips head as needed.

Step

15

Step

14


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PAGE 02-05

Removing the screws holding down the Engine Assembly (continued).

Remove upper bracket, so Engine assembly can be pulled out the back.

Step

16

Step

15

Install new Engine Assembly, reassemble in reverse order of disassembly


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LCD PROJECTION

TRAINING PACKAGE

POWER SUPPLY

INFORMATION

SECTION 3


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POWER SUPPLY INFORMATION

PAGE 03-01

POWER SUPPLY PWB LAYOUT


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LCD PROJECTION

TRAINING PACKAGE

VIDEO

INFORMATION

SECTION 4


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LCD PROJECTION

TRAINING PACKAGE

PWB FUNCTION

INFORMATION

SECTION 5


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PWB FUNCTIONS

PAGE 05-01

Front ControlSub PWB

This PWB contains the Remote Control Receiver and Learning A/V Net sensor.

The PWB contains the function switches. Power, Channel Up/Down, Volume Up/Down, Avx, Menu. Also the front LEDs are visible here. Power LED, Card ReaderLED, Temperature Sensor LED and Lamp LED.

INDICATOR INDICATION MEANING ACTION

LAMP LED LIGHT ON NO LAMP LIGHTOR LAMP BRO-

KEN

Need to replace the lampif lamp still doesn't light

after next power on, checkthe assembly of Lamp

unit.LIGHT OFF WRONG LAMP

LIGHT ASSEM-BLY OR LAMPDOOR OPEN.

TEMP LED LIGHT ON TOO HOT INSIDE

THE OPTIC AS-SEMBLY.

Call for Service

BLINKING COOLING FANSTOPPED.

POWER LED LIGHT ON NORMAL OPERA-TION.

SLOWLY BLINK-ING

UNIT COOLINGDOWN.

If the LAMP, TEMP and POWER are blinking in this order, the unit is warming up.

Signal PWB

The Signal PWB contains the Microprocessor I001 for projection operation.EEPROM memory, Closed Caption Mixer, Main Tuner, Sub (PinP) Tuner, Soundcontrol, Audio output, 3D Y/C Comb filter, 2 Line Comb filter for the PinP, Audio/Video Selector, Main and Sub Y Pr/Pb Selectors.

Front ControlPWB

Continued on next page.


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PWB FUNCTIONS

PAGE 05-02

The Power PWB generates power for the set. It produces the following voltagesfrom the Switching Regulator I901, T901.

Stand By: Runs with the set is plugged in.

SBY +3.3V, SBY +5V, SBY +35V

Switched voltages: Operates when the set is turned on.

SW +9V, SW+5V, SW5.5V, SW 3.3V, SW 2.5V and SW 1.8V

Audio B+:

SW 29V for the 12 Watt systems.

SW 38V for the 20 Watt systems.

Drive B+:

SW +15.5V and SW +5V

Fan Voltage:

12V.

Lamp Ballast Voltage:

+370V

AC to the Digital Module Power Supply.

FC4 Unit

Flex Converter. The Flex Converter is responsible for converting any input signalprovided, be it NTSC, 480i (Y Cr/Cb), 480P, 720P, 1080i or 1080P and converting itto a usable signal format for the Drive PWB which then manipulates the signal to fitthe mapping of the LCD panels.

Digital ModuleSets with built in ATSC tuner. This is called the Digital Module. It also incorporatesthe QAM digital HD cable tuner.

D/M PowerPWB

Sets with built in ATSC tuner. Digital Module Power PWB. This PWB receives +11V,+7V, +3.3V and -7V from the switching regulator IP01. Then produces regulated+9V, +5V, -5V and +3.3V to the Digital Module.

Power PWB

Continued on next page.


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PWB FUNCTIONS

PAGE 05-03

These are the three TFT Active Matrix LCD modules that make up the primarycolors producing the image on screen.

1386H X 788V

0.87 inch

14um Dot Pitch

Life more that 15,000 hours.

AUDIO PWB This containing the Audio Output IC.

Memory Card

Reader

This PWB houses the Digital Picture card reader for allowing the customer to viewhis/her pictures from their digital camera.

Lamp BallastThis PWB supplies drive to the Lamp. 100Watt, UHP Lamp with an Arc length of1mm.

Temp SensorPWB

Warning switch monitoring the temperature of the Lamp. If the lamp overheats,the set will not operate.

Door Switch PWBWarning switch connected to the Lamp Door. If this door is left open, the set willnot operate.

DVI PWB This PWB is the interface for the DVI connection to the Signal PWB.

LCD-R LCD-GLCD-R


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LCD PROJECTION

TRAINING PACKAGE

LAMP

REPLACEMENT

PROCEDURE

SECTION 6


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LAMP REPLACEMENT PROCEDURE:

PAGE 06-01

Lamp Replacement Warnings and Notes:

After extended use, if the TV picture turns dark, the color looks unusual or LAMP INDICATOR light turns on,

then it is time to replace the lamp with a new lamp.

Lamp Life

The lamp life may vary based on usage of the LCD Rear PTV. Turning on and off frequently may shorten the

life of the lamp.WARNING:

The lamp gets very hot! The lamp may explode if improperly handled. To avoid injury, please observe the fol-

lowing precautions.

Do not open lamp compartment or attempt to remove lamp assembly unless the lamp assembly is being re-

placed.

Unplug the products power cord from the AC outlet before attempting to replace the lamp assembly.If the

lamp is in use when failure occurs or if the lamp has exploded, wait at least 30-45 minutes for the lamp to cool

before opening the lamp compartment or touching the lamp assembly or any broken pieces.

Broken lamp pieces can cause injury. Handle with gloves to avoid cuts.

Do not place any foreign objects inside the lamp compartment.

When installing a new lamp, follow handling instruction included with the new lamp. Do not touch glass sur-

face of new lamp.

The lamp in this product contains Mercury. Dispose of properly in accordance with applicable environmental

laws. For Recycling and Disposal information, contact your respective governmental agencies or the Electronic

Industries Alliance at www.eiae.org (in the U.S.) or Electronic Product Stewardship Canada at www.epsc.ca (in

Canada).

CAUTION!

A "LAMP" indicator will light when lamp becomes hot. Unplug products power cord from the AC outlet and

allow lamp to cool for at least 30-45 minutes. If "LAMP" indicator is still lit, check the lamp unit assembly.

NOTES:

Contact your Hitachi dealer for a new lamp unit. Using other lamps may cause damage to the TV Set.

TYPE NAME: LC37 LAMP ASSEMBLY PART NUMBER: UX21511

When replacing the lamp, let it cool down completely, for approximately 30 to 45 minutes after the power has

been switched off and A.C. cord has been unplugged.

Do not touch the glass of the new lamp or make it dirty which can shorten the life of the lamp and reduce the

picture quality.

Keep the lamp out of the reach of children and away from flammable materials.Do not pour water onto the removed lamp or put any object inside the lamp.

Once the lamp is removed, do not put flammable materials and metal objects inside the lamp receptacle on the

TV set. Do not touch the receptacle.

Install the new lamp securely, otherwise the picture may become dark or it may cause severe overheating.

Install the lamp cover correctly, otherwise power will not come on.

The lamp in this product contains Mercury. Dispose of properly in accordance with applicable environmental

laws. For Recycling and Disposal information, contact your respective governmental agencies or the Electronic

Industries Alliance at www.eiae.org (in the U.S.) or Electronic Product Stewardship Canada at www.epsc.ca (in

Canada).

NOTICE: If a Lamp is replaced, please send the defective Lamp to:Oscar Romero C.E.T.

Hitachi Home Electronics900 Hitachi WayChula Vista, CA. 91914-3556619-591-5200Include Model Number and Serial Number.


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PAGE 06-02

LAMP REPLACEMENT (CONT.)1. Turn off the main power switch and unplug the power cord. Wait at least 30 minutes to allow the

lamp to cool down before replacing it.NOTE: THE LAMP IS VERY HOT AND MAY CAUSE FIRE OR SEVERE BURNS. WAIT AT LEAST30~45 MINUTES TO ALLOW THE LAMP TO COOL BEFORE PROCEEDING WITH LAMP RE-

MOVAL.

2. Remove the front cover from the TV set. This is held by a snap on. Pull the front cover outwards until thequick snap on disengages.


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PAGE 06-03

3. Remove the screw securing the lamp cover with a Phillips head screw driver asshown. Remove the lamp cover.

4. Remove the two screws that hold the lamp in place. Remove the lamp unit byholding the lamp handle, then pulling outwards. Exercise caution when removingthe lamp unit to avoid injury to your fingers.

NOTE: DO NOT PUT YOUR HAND IN THE LAMP STORAGE AREA AFTER THELAMP UNIT IS REMOVED, YOU MAY GET BURNED.


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PAGE 06-04

5. Replace with the new lamp.Place the removed lamp into the empty box of the replacement lamp. Do not touchthe front glass of the new lamp or its receptacle. This may shorten the life of thelamp and reduce the picture quality.

Push the lamp unit back to its original position. Tighten the screws firmly on the lamp unit. If they are loose, the TV may not

operate correctly.

6. Without installing the lamp cover, the power will be off and the Lamp Indicatorwill flash (see page 23). Be sure to install the lamp cover by re-engaging the twoclips and tighten the screws before turning the power on, otherwise it may causeunusual colors.

NOTE: IF POWER IS CONNECTED BEFORE THE LAMP COVER IS INSTALLED,THE POWER WILL BE OFF AND THE LAMP INDICATOR WILL FLASH (See FrontLED Explanation in the PWB Function section).


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PAGE 06-05

7. Install the front cover as shown below. Put the front cover back in and align thesnap on quick connect then push inwards holding the left and right side of thefront cover until you hear a snap. Push the other snap on gently to make a goodfit.

NOTICE: If a Lamp is replaced, please send the defective Lamp to:Oscar Romero C.E.T.Hitachi Home Electronics900 Hitachi WayChula Vista, CA. 91914-3556619-591-5200Include Model Number and Serial Number.


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