Kortek KT-LL84ULFX-PD, Руководство по обслуживанию

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Service Manual
REV 0.1
59
9. INSPECTION
9.1 Electric Performance Inspection
Check for OSD control switch.
(1)
Receive Ultra HD(UHD) 3,840 X 2,160 (30Hz) or FHD(WUXGA) 1,920 x 1,080(60Hz), cross hatch
pattern.
(2)
Check that the LED on IR Receive B'D is Green
(3)
Check that any noise is shown on the display with power on and off.
(4)
Check that OSD is displayed when the MENU button on the OSD-KEY(on rear-side of panel) is
pressed.
(5)
Check that the sound adjustment menu is shown, when Vol
– button on OSD-KEY is pressed and
OSD is off.
(6)
Check that the sound adjustment menu is shown, when Vol+ button on OSD-KEY is pressed and
OSD is off.
(7)
Check that the input signal is changed when INPUT- button on OSD-KEY is pressed.
(8)
Check that each value changes smoothly and any noise are shown on display, when (-/<) and (+/>)
button in OSD adjustment menu are pressed
9.2 Check for the received recommended frequency
(1) Check that the recommended frequency signal is received and displayed successfully.
(2) Check that the display is shown in 5 seconds after the received signal is changed.
9.3 Check the performance
(1) Receive 3,840 x 2,160(30Hz) or 1920 X 1080 (60Hz), RGB 256 gray scale pattern.
(2) Check whether the color gray scale is displayed smoothly, and all data is shown.
9.4 Inspection for Audio function
Purpose: Confirm the audio function works well.
(1) Connect Audio input terminal with PC or Audio player and audio signal.
(2) Receive 3,840 x 2,160(30Hz) or 1920 X 1080 (60Hz)
(3) Display the sound adjustment stage.
(4) Press Vol + and Vol- button to change the sound level.
(5) Check that the sound outputs normally from the right and left speaker
9.5 External Inspection on the LCD Module
9.5.1 Description
The LC840EQD is a Color Active Matrix Liquid Crystal Display with an integral Light Emitting Diode (LED)
back light system. The matrix employs a-Si Thin Film Transistor as the act ive element .
It is a transmissive display type which is operating in the normally black mode. It has a 84.04 inch diagonally
measured active display area with QWUXGA resolution (2160 vertical by 3840 horizontal pixel array).
Each pixel is divided into Red, Green and Blue sub-pixels or dots which are arrayed in vertical stripes.
Gray scale or the luminance of the sub-pixel color is determined with a 10-bit gray scale signal for each dot.
Therefore, it can present a palette of more than 1.06Billion colors.
It has been designed to apply the 10-bit 16 Lane V by One interface.
9.5.2 The condition of inspection
9.5.2.1. Ambient Condition
(1) Ambient illumination : Single 20W fluorescent lamp non-directive(300 to 700 Lux)
(2) Ambient temperature : 20~25°C
(3) Ambient humidity : 65 ±5%
9.5.2.2. Viewing Distance
(1) Minimum 4 x Height of panel
9.5.2.3. Viewing Angle
The surface of the
module and the inspector's line of view shall be at 90 degrees.(left 178’/ right 178’)
Viewing angle is the angle at which the contrast ratio is greater than 10.