Sharp PN-T322B Service Manual - Page 74

Hardware Descriptions, 1. System Description, Unit Configuration Of The Display

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CHAPTER 9. HARDWARE DESCRIPTIONS 1. SYSTEM DESCRIPTION 1 - 1. UNIT CONFIGURATION OF THE DISPLAY This display consists of the following units. n LCD Unit n I/F Board Unit n IR/SW Board Unit n LED Driver Board Unit n Power Supply PWB Unit n Temperature Sensor Board Unit n Speaker (L/R) ■ LCD UNIT This unit uses a 31.5" TFT (Thin Film Transistor) panel, and is a module equipped with a LED backlight unit and 1ch LVDS interface. This LCD panel uses the WXGA format of 1366 x 768, and is capable of displaying about 16,770,000 colors (6-bit+HI-FRCcolors). LCD driving method Amorphous Silicon TFT Active Matrix Display pixel count 1366 x R.G.B. x 768 pixel Pixel pitch (sub pixel) 0.17025 (H) x 0.51075 (V) mm Pixel array RGB vertical stripes Max. display colors 16.7M color Contrast ratio 2500:1 Response speed 6.5ms (gray to gray) Screen display mode MVA/ Normally black Surface process Anti glare coating (Haze value 17%) ■ I/F BOARD UNIT The scaler is MT8223H of MTK (Media Tech). The following terminals are implemented for external interfaces. Analog RGB signal mini D-SUB 15 pin input Digital signal input DVI-D 24 pin Component signal 4-pole mini jack (Y,Pb/ Cb,Pr/ Cr) input Composite signal 4-pole mini jack (Video, Audio L, R) input Digital signal input HDMI PC audio input φ3.5 stereo mini jack RS-232C input D-SUB 9 pin External audio input φ3.5 stereo mini jack USB memory USB connector ■ IR/SW BOARD UNIT This is a PWB unit placed inside the bezel at the bottom left area of the front side. It has the LED indicating power status, the IR receiver for remote control, and the operating switches (power on/off, input switching) implemented. The LED indication (status of power lamp) is as follows. Green light-up Green blinking Orange light-up Red and green blinking Power [ON] (in normal operation) Waiting for input signal (in PC input) Power [OFF] (when the remote control is OFF) Temperature anomaly (when it is set by OSD) ■ LED DRIVER BOARD UNIT This is a PWB unit for driving the LED backlight incorporated in the LCD unit. INPUT ELECTRICAL CHARACTERISTICS No. Item Symbol Min Type Max Unit 1 Input Voltage Vin 21.6 24 26.4 V 2 Input Current Iin

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PN-T321/T322B
HARDWARE DESCRIPTIONS
9 – 1
CHAPTER 9.
HARDWARE DESCRIPTIONS
1.
SYSTEM DESCRIPTION
1 - 1.
UNIT CONFIGURATION OF THE DISPLAY
This display consists of the following units.
n
LCD Unit
n
I/F Board Unit
n
IR/SW Board Unit
n
LED Driver Board Unit
n
Power Supply PWB Unit
n
Temperature Sensor Board Unit
n
Speaker (L/R)
■
LCD UNIT
This unit uses a 31.5” TFT (Thin Film Transistor) panel, and is a module
equipped with a LED backlight unit and 1ch LVDS interface.
This LCD panel uses the WXGA format of 1366 x 768, and is capable of
displaying about 16,770,000 colors (6-bit+HI-FRCcolors).
■
I/F BOARD UNIT
The scaler is MT8223H of MTK (Media Tech).
The following terminals are implemented for external interfaces.
■
IR/SW BOARD UNIT
This is a PWB unit placed inside the bezel at the bottom left area of the
front side.
It has the LED indicating power status, the IR receiver for
remote control, and the operating switches (power on/off, input switch-
ing) implemented.
The LED indication (status of power lamp) is as follows.
■
LED DRIVER BOARD UNIT
This is a PWB unit for driving the LED backlight incorporated in the LCD
unit.
INPUT ELECTRICAL CHARACTERISTICS
LCD driving method
Amorphous Silicon TFT Active Matrix
Display pixel count
1366 x R.G.B. x 768 pixel
Pixel pitch
(sub pixel)
0.17025 (H) x 0.51075 (V) mm
Pixel array
RGB vertical stripes
Max. display colors
16.7M color
Contrast ratio
2500:1
Response speed
6.5ms (gray to gray)
Screen display
mode
MVA/ Normally black
Surface process
Anti glare coating (Haze value 17%)
Analog RGB signal
input
mini D-SUB 15 pin
Digital signal input
DVI-D 24 pin
Component signal
input
4-pole mini jack (Y,Pb/ Cb,Pr/ Cr)
Composite signal
input
4-pole mini jack (Video, Audio L, R)
Digital signal input
HDMI
PC audio input
φ
3.5 stereo mini jack
RS-232C input
D-SUB 9 pin
External audio input
φ
3.5 stereo mini jack
USB memory
USB connector
Green light-up
Power [ON] (in normal operation)
Green blinking
Waiting for input signal (in PC input)
Orange light-up
Power [OFF]
(when the remote control is OFF)
Red and green
blinking
Temperature anomaly
(when it is set by OSD)
No.
Item
Symbol
Min
Type
Max
Unit
1
Input Voltage
Vin
21.6
24
26.4
V
2
Input Current
Iin
<3.0
A
3
Input Power
Pin
---
62
---
W
4
Brightness
Voltage
Vbri
0
---
5
V
5
Control
Voltage
Enable Von=2.5 - 5.0V
Disable Voff=0 - 0.6V