LG flatron M1740A Service Manual

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1. LCD CHARACTERISTICS
Type : TFT Color LCD Module
Size :
296.5 (V) x 358.5 (H) x 17.0 (D)-M1740A
: 330.0 (V) x 404.2 (H) x 20.0 (D)-M1940A
: 432 (V) x 331.5 (H) x 25 (D)-M2040A
Pixel Pitch : 0.264mm x 0.264mm-M1740A
: 0.098*RGB x 0.294mm-M1940A
: 0.255 x 0.255mm-M2040A
Color Depth :
6-bits + FRC, 16.2M colors-M1740A,M1940A
: 8-bits, 16.777,216M colors-M2040A
Active Video Area : 17 inch-M1740A
: 19 inch-M1940A
: 20.1 inch-M2040A
Surface Treatment : Low Reflection Glare treatment,
Hard Coating (2H)
Backlight Unit : 4CCFL-M1740A,-M1940A
: 6CCFL-M2040A
Opraating Mode :
Transmissive mode, Normally White-M1740A,M1940A
: Transmissive mode, Normally Black-M2040A
Electrical Interface : LVDS
2. OPTICAL CHARACTERISTICS
2-1. Viewing Angle by Contrast Ratio ≥ 10
M1740A,M1940A
Right : +60° min. +70° typ. Left : -60° min. -70° typ.
Top : +60° min. +70° typ. Bottom: -60° min. -70° typ.
M2040A
Right : +85° min. +88° typ. Left : -85° min. -88° typ.
Top : +85° min. +88° typ. Bottom: -85° min. -88° typ.
2-2. Luminance : 300(min.), 420(typ.)-M1740A
: 300(min.), 400(typ.)-M1940A
: 250(min.), 300(typ.)-M2040A
2-3. Contrast Ratio :
300(min.), 500(typ.)-M1740A,M1940A
2-3. Contrast Ratio : 400(min.), 600(typ)-M2040A
3. SIGNAL (Refer to the Timing Chart)
3-1. Sync Signal
1) Type :
Separate Sync, Composite, SOG, Digital
3-3. Operating Frequency
Horizontal : 30 ~ 83kHz
Vertical : 56 ~ 75Hz
4. SPECIAL FUNCTION
4-1. Audio AMP
1) Output : 3Wrms + 3Wrms-M1740A,M1940A
: 5Wrms + 5Wrms-M2040A
2) Freq. Character : 100Hz~10KHz Range(-3dB)
3) Input : PC - 0.7±0.1Vrms
AV - 0.5±0.1Vrms
4-2. SPEAKER
1) Impedance : 16Ω
2) Input :
Max-5W, Normal-3W-M1740A,M1940A
: Max-8W, Normal-5W-M2040A
4-3. TV
1) Type : PAL
2) Tuner IF : PIF - 38.9MHz
SIF - 33.4MHz
CIF - 34.47MHz
3) Receiving Channel: VHF- Low : 45.25~140.25MHz
HIGH : 147.25~423.25MHz
UHF - 431.25~855.25MHz
4-4. AV
1) Video Level : Input - 0.7±0.15Vp-p
2) Sync Level : Input - 0.286±0.075Vp-p
3) Color Burst : Input - 0.214±0.072Vp-p
4) Audio Level : AV Input - 0.5±0.1Vrms
PC Input - 0.7±0.1Vrms
5) Video Cross Talk : 43dB
5. Max Resolution
SXGA :
1280 x 1024@75Hz-M1740A,M1940A
VXGA : 1600 x 1200@60Hz-M2040A
6. POWER SUPPLY
6-1. Power
100-240V~, 50/60Hz
6-2. Power Consumption
7. ENVIRONMENT
7-1. Operating Temperature : 10°C~35°C (50°F~95°F)
7-2. Operating Humidity : 20%~80%
7-3. MTBF : 50,000 Hours (Min.)
Lamp Life : 50,000 Hours (Min.)
8. DIMENSIONS (with TILT/SWIVEL)
M1740A
Width : 501.5 mm (19.74'')
Depth : 158.2 mm (6.23'')
Height : 500.3 mm (19.70'')
M1940A
Width : 542.5 mm (21.36'')
Depth : 222.8 mm (8.77'')
Height : 541.4 mm (21.31'')
M2040A
Width : 575.1 mm (22.64'')
Depth : 221.1 mm (8.70'')
Height : 557.5 mm (21.95'')
9. WEIGHT (with TILT)
M1740A
Net. Weight : 6.65 kg (14.66 lbs)
Gross Weight : 10.05 kg (22.16 lbs)
M1940A
Net. Weight : 7.75 kg (17.09 lbs)
Gross Weight : 11.65 kg (25.69 lbs)
M2040A
Net. Weight : 8.7 kg (19.18 lbs)
Gross Weight : 13.4 kg (29.55 lbs)
CONTENTS
SPECIFICATIONS
SPECIFICATIONS ................................................... 2
PRECAUTIONS ....................................................... 4
SERVICE PRECAUTIONS ...................................... 5
TIMING CHART ....................................................... 7
DISASSEMBLY ....................................................... 8
BLOCK DIAGRAM ................................................... 9
DESCRIPTION OF BLOCK DIAGRAM ................. 10
ADJUSTMENT ...................................................... 12
TROUBLESHOOTING GUIDE .............................. 15
WIRING DIAGRAM ............................................... 19
EXPLODED VIEW...................................................20
REPLACEMENT PARTS LIST ...............................22
SCHEMATIC DIAGRAM......................................... 30
LED COLOR
BLUE
AMBER
OFF
MODE
ON MODE (NORMAL)
SLEEP MODE
OFF MODE (POWER SWICH OFF)
H/V SYNC
ON/ON
OFF/ON
ON/OFF
VIDEO
ACTIVE
OFF
OFF
POWER CONSUMPTION
less than 65 W-M1740A,M1940A
less than 74 W-M2040A
Audio X normal-50W-M1740A-M1940A
Audio X normal-64W-M2040A
Audio O normal-65W-M1740A-M1940A
Audio O normal-70W-M2040A
less than 4 W
less than 2 W

LG flatron M1740A Specifications

General

Brand	LG
Model	flatron M1740A
Category	Monitor
Language	English