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.
Summary of Contents for KT-LL84ULFX-PD
Page 2: ...Service Manual REV 0 1 2 REVISION HISTORY REVISION DATE NOTE REV0 1 Jun 06 2015 1st issued ...
Page 24: ...Service Manual REV 0 1 24 2 8 No Speaker out from internal speakers ...
Page 25: ...Service Manual REV 0 1 25 2 9 The fault of Remote control ...
Page 26: ...Service Manual REV 0 1 26 2 10 The fault of Key control pad ...
Page 27: ...Service Manual REV 0 1 27 2 11 Image overlap focus or flicker ...
Page 28: ...Service Manual REV 0 1 28 2 12 Brightness defect ...
Page 33: ...Service Manual REV 0 1 33 3 2 Front disassembly 3 2 1 Remove bolts Remove FRONT cover ...
Page 36: ...Service Manual REV 0 1 36 ...
Page 46: ...Service Manual REV 0 1 46 2 Part number 109273 SUB SMPS CN7 AD B D W205 ...
Page 47: ...Service Manual REV 0 1 47 3 Part number 109272 Main SMPS CN4B SUB SMPS CN8 AD Main W200 ...
Page 48: ...Service Manual REV 0 1 48 4 Part number 109271 AD Main W804 5 Part number 109270 AD Main W803 ...
Page 49: ...Service Manual REV 0 1 49 6 Part number 109269 ...
Page 50: ...Service Manual REV 0 1 50 6 Part number 107545 Main SMPS CN4A SUB SMPS CN3 ...
Page 51: ...Service Manual REV 0 1 51 7 Part number 107542 OSD KEY ...
Page 52: ...Service Manual REV 0 1 52 8 Part number 110383 ...
Page 54: ...Service Manual REV 0 1 54 10 Part number 107536 SMPS Converter 11 Part number 107535 ...
Page 55: ...Service Manual REV 0 1 55 12 Part number 108481 ...
Page 56: ...Service Manual REV 0 1 56 41p 13 Part number 108482 ...
Page 64: ...Service Manual REV 0 1 64 10 2 Packaging 10 2 1 Unpacking ...