Specific Service Instructions - JVC LT-26WX84 Service Manual

2.1 FEATURES
• New chassis design enable use of an interactive on screen control.
• MOTION COMPENSATION : With this function, the seamless reproduction of dynamic motion on the screen has been realized.
• Bullet-in 3 dimension Y/C separate circuit.
• Receive DTV broadcast (1125i / 750p / 525p / 525i)
• Built-in HDCP / Component (Y / Pb / Pr) input.
• Built-in Hyper Sound, BBE circuit.
• DIST is a digital high-definition image processing technology that converts various image input signals such as NTSC(480i), 480p,
720p, and 1080i into a format with the best resolution for a display device such as a plasma display panel, and displays high-
definition images.
2.2 TECHNICAL INFORMATION
2.2.1 LCD PANEL
This unit uses the flat type panel LCD (Liquid Crystal Display) panel that occupies as little space as possible, instead of the
conventional CRT (Cathode Ray Tube), as a display unit.
2.2.1.1 STRUCTURE
The LCD panel of the unit is constructed with the metal chassis that surrounds the panel unit and supports the LCD panel part and
the backlight part to protect them.
The color filter glass and the TFT glass (thin film transistor) are inserted between the front polarizing filter and the rear polarizing filter.
Liquid crystals are inserted between the color filter glass and the TFT glass. Since the gap between the two glasses is only a few µm,
a spacer (bead) is inserted in the gap to retain the gap.
The backlight unit is placed behind the LCD panel. Since liquid crystals themselves do not emit light, the backlight as an external light
source emits light to the LCD panel from behind through the diffuser.
Circuit boards for controlling the LCD panel and the backlight are attached around the back part of the LCD panel unit.
Since the unit has the two polarizing filter that are at right angles to each other, the unit adopts "normally black" mode, where light
does not pass through the polarizing filter and the screen is black when no voltage is applied to the liquid crystals.
Top chassis
1-6 (No.YA089)
SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

Diffuser supporter
Lower frame
Upper frame
Lamp supporter
Panel ASSY
Diffuser (including board)
Fig.1 Structure of the LCD panel unit
Inverter shield cover
Source board
Sield case
Inverter board
Reflection plate