LG M1721A, Service Manual

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CONTENTS
SPECIFICATIONS
SPECIFICATIONS ................................................... 2
PRECAUTIONS ....................................................... 3
SERVICE PRECAUTIONS ...................................... 4
TIMING CHART ....................................................... 7
DISASSEMBLY ....................................................... 8
BLOCK DIAGRAM ................................................... 9
DESCRIPTION OF BLOCK DIAGRAM ................. 11
ADJUSTMENT ...................................................... 12
TROUBLESHOOTING GUIDE .............................. 14
WIRING DIAGRAM ............................................... 18
EXPLODED VIEW...................................................19
REPLACEMENT PARTS LIST ...............................21
SCHEMATIC DIAGRAM ......................................... 27
1. LCD CHARACTERISTICS
Type : TFT Color LCD Module
Active Video Area : 17.0 inch- M1721A
: 19.0 inch- M1921A
Size : 358.5(V) x 296.5(H) x 15(D)- M1721A
: 396.0(V) x 324.0(H) x 15(D)- M1921A
Pixel Pitch : 0.264mm x 0.264mm- M1721A
: 0.294mm x 0.294mm- M1921A
Color Depth : 6Bits with A-FRC, 16,777,216 colors
Surface Treatment : Anti Glare, Hard Coating(3H)
Operating Mode
: Normally white
Backlight Unit : 4CCFL (4Lamps)
Electrical Interface : LVDS
2. OPTICAL CHARACTERISTICS
2-1. Viewing Angle by Contrast Ratio
≥
10
Left : +70° min., +80° typ / Right : +70° min., +80° typ
Top : +60° min., +75° typ / Bottom : +70° min., +85° typ
2-2. Luminance : 180(min.), 250(typ.)
2-3 Contrast Ratio : 3000(min.)
3. SIGNAL (Refer to the Timing Chart)
3-1. Analog Video Input
1) Video Input Range : 0~0.7V ± 5%
2) Video Termination Impedance : 75
Ω
± 5%
3) Sync Type : Separate Sync.
4) Sync Level : TTL Low
≤
0.8V, High
≥
2.0V
3-2. Operating Frequency
Horizontal : 30 ~ 70kHz
Vertical : 56 ~ 75Hz
4. RESOLUTION
Analog Max : 1280 x 1024@60Hz
5. POWER SUPPLY
5-1. Power
AC 100-240Vac, 50/60Hz
5-2. Power Consumption
6. ENVIRONMENT
5-1. Operating Temperature : 10°C ~ 35°C
5-2. Operating Humidity : 20% ~ 80%
5-3. MTBF : 50,000 Hours (Min)
7. DIMENSIONS (with TILT/SWIVEL)
M1721A
Width : 394.4 mm (15.53'')
Depth : 243 mm (9.57'')
Height : 404 mm (15.91'')
M1921A
Width : 445 mm (17.52'')
Depth : 243 mm (9.57'')
Height : 457 mm (17.99'')
8. WEIGHT (with TILT/SWIVEL)
M1721A
Net. Weight : 4.5 kg (9.92 lbs)
Gross Weight : 6.2 kg (14.33 lbs)
M1921A
Net. Weight : 5.5 kg (12.13 lbs)
Gross Weight : 7.1 kg (15.66 lbs)
H/V SYNC
ON/ON
OFF/ON
-
MODE
POWER ON (NORMAL)
SLEEP MODE
POWER S/W OFF
VIDEO
ACTIVE
OFF
OFF
POWER CONSUMPTION
less than 45 W
less than 1 W
less than 1 W
LED COLOR
GREEN
RED
OFF