Read LG 32LD400 / 42LD400 Service Manual online
MODEL :32LD400_LC320WUG-SCR7
42LD400_LC420WUG-SCR7
P/NO：SG-0361 (REV00) Printed in Taiwan
32LD400、42LD400 Service Manual
Table of Contents
CONTENTS PAGE
Sections
1. Features
1-1
2. Specifications
2-1
3. On Screen Display
3-1
4. Factory Preset Timings
4-1
5. Pin Assignment
5-1
6. Main Board I/O Connections
6-1
7. Theory of Circuit Operation
7-1
8. Waveforms
8-1
9. Trouble Shooting
9-1
10. Block Diagram
10-1
11. Spare parts list
11-1
12. Complete Parts List (32LD400)
12-1
12. Complete Parts List (42LD400)
12-2
13. EDID List (32LD400，42LD400)
13-1
Appendix
1. Main Board Circuit Diagram
2. Main Board PCB Layout
3. Assembly Explosion Drawing
CONFIDENTIAL – DO NOT COPY
Page 1-1
File No. SG-0361
Chapter 1 Features
1. Built in TV channel selector for TV viewing
2. Simultaneous display of PC and TV images
3. Connectable to PC’s analog RGB port
4. Built in HDTV, composite video, HDMI ,ATV out and DTV out ,Audio line
out, Audio optical out
5. Built in auto adjust function for automatic adjustment of screen display
6. Smoothing function enables display of smooth texts and graphics even if
image with resolution lower than 1920x1080 is magnified
7. Power saving to reduce consumption power too less than 1W
8. On Screen Display: user can define display mode (i.e. color, brightness,
contrast, sharpness, backlight), sound setting, TV channel program,
aspect and gamma or reset all setting.
CONFIDENTIAL – DO NOT COPY
Page 2-1
File No. SG-0361
Chapter 2 Specification
1. TFT LCD CHARACTERISTICS
LC320WUG-SCR7-8R2
Item Specification
Active Screen Size
31.55 inch (801.31mm) diagonal
Outline Dimension
760.0(H) x 450.0 (V) x 32.5 mm(D)
Pixel Pitch
0.36375 mm x 0.36375 mm
Pixel Format
1920 horiz. by 1080 vert. Pixels, RGB stripe arrangement
Color Depth
8-bit, 16.7 M colors(※1.06B colors@10bit(D)System Output)
Luminance, White
500 cd/m2 (Center 1point,Typ.)
Viewing Angle (CR>10)
Viewing angle free ( R/L 178 (Typ.), U/D 178 (Typ.))
Power Consumption
Total 111.08 W (Typ.) (Logic=6.08 W with T-CON,
Backlight=105W @ with Inverter )
Backlight=105W @ with Inverter )
Weight 5.0Kg
(Typ.)
Display Mode
Transmissive mode, Normally black
Surface Treatment
Hard coating (3H), Anti-glare treatment of the front polarizer
(Haze 10%)
(Haze 10%)
LC420WUG-SCR7-7R2
Item Specification
Active Screen Size
42.02 inch (1067.31mm) diagonal
Outline Dimension
983.0(H) x 576.0 (V) x 35.5 mm(D)
Pixel Pitch
0.4845 mm x 0.4845 mm
Pixel Format
1920 horiz. by 1080 vert. Pixels, RGB stripe arrangement
Color Depth
8-bit, 16.7 M colors(※1.06B colors@10bit(D)System Output)
Luminance, White
500 cd/m2 (Center 1point,Typ.)
Viewing Angle (CR>10)
Viewing angle free ( R/L 178 (Typ.), U/D 178 (Typ.))
Power Consumption
Total 156.8 W (Typ.) (Logic=7.8 W with T-CON,
Backlight=149W @ with Inverter l out duty 100%)
Backlight=149W @ with Inverter l out duty 100%)
Weight 8.7Kg
(Typ.)
Display Mode
Transmissive mode, Normally black
Surface Treatment
Hard coating (3H), Anti-glare treatment of the front polarizer
(Haze 10%)
(Haze 10%)