JVC PD-35D30ES, Service Manual

Page: 9 / 188

PD-35D30ES
(No.52091)1-9
2.2 TECHNICAL INFORMATION
2.2.1 PDP STRUCTURE AND CHARACTERISTIC
This unit (Display Unit) uses the flat type panel PDP (Plasma Display Panel), instead of the conventional CRT (Cathode Ray Tube),
as a display unit.
2.2.2 PIXEL (CELL) ARRAY
PDP is constructed by sealing the xenon, which emits neon and ultraviolet rays for discharging purpose, in between the electrodes
lay on the front glass substrate and rear glass substrate.
One pixel is composed of 3 RGB cells, with cell pitch of 0.36mm (1 pixel 1.08mm) horizontally and 1.08mm vertically.
The cell is arrayed in each RGB color as shown in Fig. 1. One pixel is formed by interlacing each RGB color cell.
One cell size is 0.36mm horizontally and 1.08mm vertically.
Fig.1
2.2.3 PIXEL DEFECTS
Though PDP is made by means of ultra precise technology, there are cases whereby not all pixels (cell) will function properly. In some
cases, there may be defective pixels that do not light at all or the ones that always light on.
There are 2 types of Pixel defects, [Bright Dot Defects] and [Dark Dot Defects], as defined respectively in the following:
(1) Bright Dot Defects
Bright dot defect is a pixel cell that lights or blinks though it should not light.
The presence of bright dot defects can be confirmed by inputting a full black signal (pattern).
(2) Dark Dot Defects
Dark dot defect is a pixel cell that does not light, blinks, or lights twice as brightly as the pixel cell should light, though it should light.
The presence of dark dot defects can be confirmed by inputting a 100% full white signal (pattern).
R G B R G B
R G B R G B
G B R G B
G B R G B
R
R
R G B R G B
R G B R G B
G B R G B
G B R G B
R
R
No.1
Pixel
sequence
No.2
Pixel
sequence
No.852
Pixel
sequence
No.853
Pixel
sequence
No.1
Pixel line
No.2
Pixel line
Horizontally
Vertically
Direction
1.08mm(Horizontally)
Pixel pitch
0.36mm(Vertically)
Cell pitch
1.08mm
(Verticall)
Pixel pitch
(Cell pitch)
1 pixel
(1 dot)
No.479
Pixel line
No.480
Pixel line
R Cell
G Cell
B Cell