MITSUBISHI - WD-52525_WD-52725_WD-52825_ED_62525_WD-62725_WD-62825_Accessing and Disconnecting Lamp Ballast_Service Mode_Test Signal Activation

• Remove the Right Support.  Remove the 3 screws shown below.

Remove the Lamp Ballast Shield [4 screws]

Unplug CN-1 & CBN-2 connectors.  Unplug the connectors.

REMOVING THE OPTICAL ENGINE

• Remove the cabinet back.
• Disconnect all connectors from the Optical Engine, Lamp Cartridge Housing, and the PCB-DND.
• From the rear of the TV, remove the 4 screws, to remove the Cover-Duct and DMD fan cover.
• From the rear of the TV, remove the 4 brass colored screws securing the bottom plate to the adjuster assembly.
• Slide the Optical Engine/Lamp Cartridge Housing towards the rear to remove from the TV.

Remove the following parts from the Optical Engine.

• DMD heat Sensor.
• The Optical Engine bottom plate and back bracket.

DMD Heat Sensor Removal.

• Remove screw on the top of the DMD fan.
• Set the Heat Sensor to install on the replacement Optical Engine.

Bottom Plate and Black Bracket Removal

• Remove the 4 screws from the bottom plate.
• Remove the 2 scres, holding the Black Bracket to the Lamp.

Black Support Bracket.

INSTALLING THE OPTICAL ENGINE

• Install the bottom plate, Black Support Bracket and the Heat Sensor, removed from the original Optical Engine, on the replacement engine.
• Reversal the removal procedure to install the replacement Optical Engine in the cabinet.
• The following adjustments may have to be performed after the installation.

1. Horizontal and Vertical Electrical Centering Adjustment.
2. Optical Unit Rotation.
3. Optical Unit Keystone Distortion Adjustment.

• After Optical Engine replacement, perform the Data Copy Procedure described below.

DATA COPY PROCEDURE

• To display the data copy  menu, press < TV => MENU > < 2 - 4 - 5 - 7 > < 0 >
• Use the cursor keys to highlight "Copy Light Engine EEPROM to DM"
• Press <Enter>
• After Copy Procedure has been completed, Exit the menu by pressing <HOME>

ACTIVATING

 THE CIRCUIT ADJUSTMENT MODE {Service Mode}

• Press the "TV MENU" button on the remote control.  The customer menu will appear.
• Press buttons { 2 => 4 => 5 => 7} in the order .  The screen will change to the Adjustment Mode.  If successful, repeat steps 1 & 2.

TEST SIGNAL ACTIVATION

• When in the Circuit Adjustment Mode, press "REWIND" once on the remote control to activate the Test Pattern.  This Pattern is used for both electrical & mechanical adjustment.