TOSHIBA 52HM84 - HOW TO REPLACE LAMP TO TOSHIBA-52HM84 - PARTS REPLACEMENT IN LIGHT ENGINE - Service Mode & LED Indications - PROJECTION TV

LAMP REPLACEMENT

LIGHT ENGINE is a heart of TV which emits high heat.

Make sure to replace it after turning off the TV and wait for sufficient cool down. (More than one hour is recommended.)

Do not add any impact during replacement; otherwise, some parts may be damaged.

Do not touch any optical lens. Adhesion of dirt may deteriorate its performance.

Do not loosen any screw other than those to be removed for adjustment or replacement.

LIGHT ENGINE emits ultraviolet rays when the TV is ON. Make sure to be careful.

• When Light Engine Unit is replaced with a new one, the adjustment is required. Adjusted values are described in bar code, and the values of bar code must be converted to the adjusted values for the setup. There are 2 types of bar code.

• Adjustment is made by service mode. The adjusting items consist of CWDL, CWDH and DMDB.

CWDL  CWDH

• When CW delay number of the data bar code is 0450:  0450 indicates => 450 => 45.0
• Double 45.0 to form hexadecimal number (HEX).  45.0 x 2 = 90 => 5A Hexadecimal.
• The adjusted value becomes “5A” for CWDL and “00” for CWDH.
• If hexadecimal number forms 3 or 4 digits, the latter 2 digits indicate CWDL while the first 2 digits indicate CWDH (For 3 digits, CWDH=0*)

LIGHT ENGINE PARTS REPLACEMENT

Fan Replacement

For replacing FAN for cooling heat sink, remove 2 screws.  For replacing FAN for cooling lamp, detach FAN hood located on LIGHT ENGINE by removing 2 screws and then remove 4 screws.

Replacement of Ballast Power Unit

• Detach the ballast power unit by removing 4 substrate stoppers that hold the ballast power unit.

Precautions:   When Exchanging Ballast Power Units When you install a new ballast power unit, install it while pushing the four corners of the board directly.

Installation while pressing the heat sink may cause the pattern crack.

Replacement of Temperature Breaker

• Remove 2 screws for replacing the temperature breaker for lamp.

Replacement of Sensor Unit

• Remove 2 screws fixing a color wheel cover and UV filter box.

• Remove one screw for motor unit.
• Remove 2 screws holding Photo Detector substrate.

CLICK ON PICTURES TO MAGNIFY

Caution:  When removing screws, do not damage the color wheel with drivers, etc. Even a small impact may damage the color wheel.  Make sure not to touch the color wheel.  Don’t remove other screws by any means.

ENTERING TO SERVICE MODE

• Press MUTE button twice on Remote Control.
• Press MUTE button again to keep pressing.
• While pressing the MUTE button, press MENU button on TV set.

DISPLAYING THE ADJUSTMENT MENU

• Press MENU button on TV

SELECTING THE ADJUSTING ITEMS

• Every pressing of CHANNEL ▲  button in the service mode changes the adjustment items.  (▼ button for reverse order).
• Pressing of VOLUME ▲/▼  button will change the value of data in the range from 00H to FFH. The variable range depends on the adjusting item.
• To EXIT press POWER button to turn off the TV once

LED indications