JVC LT-Z32S2, Service Manual

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1-6 (No.YA020)
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
2.1 FEATURES
2.1.1 FUNCTION / CIRCUITS
• DIST (Digital Image Scaling Technology)
Employs an interpolation method that doubles the scanning lines to realize 480-line flickerfree picture making it especially suitable
for reproducing high-resolution pictures even on large-screen displays.
• DIGITAL VNR
The DIGITAL VNR function cuts down the amount of noise in original picture. There are three function settings of AUTO,MIN and
MAX.
• Super DigiPure
This function uses the latest technology to give viewer a natural looking picture.
It consist of DigiPure and picture motion compensation function.
• COLOUR MANAGEMENT
This function ensures dull colours are compensated to produce natural hues.
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.
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.
2.2.1.1 SPECIFICATIONS
The following table shows the specifications of this unit.
2.2.1.2 PIXEL FAULT
There are three pixel faults - bright fault , dark fault and flicker fault - that are respectively defined as follows.
(1) BRIGHT FAULT
In this pixel fault, a cell that should not light originally is lighting on and off.
For checking this pixel fault, input ALL BLACK SCREEN and find out the cell that is lighting on and off.
(2) DARK FAULT
In this pixel fault, a cell that should light originally is not lighting or lighting with the brightness twice as brighter as originally lighting.
For checking this pixel fault, input 100% of each R/G/B colour and find out the cell that is not lighting.
(3) FLICKER FAULT
In the pixel fault, a cell that should light originally or not light originally is flashing on and off.
For checking this pixel fault, input ALL BLACK SCREEN signal or 100% of each RGB colour and find out the cell that is flashing on
and off.
Item Specifications Remarks
Maximum dimensions ( W
×
H
×
D ) 76.4cm
×
46.5cm
×
3.8cm
Weight 8.0kg
Effective screen size Diagonal : 80.2cm (H:41.2cm
×
V : 68.7cm) 32V type
Aspect ratio 15:9
Drive device/ system a-Si-TFT, active matrix system
Resolution Horizontally 1280
×
Vertically 768
×
RGB <W-XGA> 2949120 dots in total
Pixel pitch (pixel size) Horizontally:0.4425mm, Vertically:0.4425mm
Displayed color 16777216 colors 256 colors for R, G, and B
Brightness 470cd/m
2
Contrast ratio 500:1
Response time 13ms
View angle Vertically 170
°
, horizontally 170
°
Surface Polarizer Anti-Glare type
Color Filter Vertical stripe
Backlight Cold cathode fluorescent lamp
×
16
Power Supply Voltage in LCD 12V
Power Supply Voltage in Backlight 1290V (rms)