LG Flatron W2243T User manual

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E-mail: http://www.LGEservice.com/techsup.html
COLOR MONITOR
SERVICE MANUAL
MODEL:W2243T (W2243T-PFT.A**NAPH for
LGD TLA1, W2243T-PFT.A**VAPH for AUO V0)**Sales Market
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
*ToapplytheNovatekChip.
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CONTENTS
SPECIFICATIONS ...................................................2
PRECAUTIONS .......................................................3
TIMING CHART .......................................................7
DISASSEMBLY ........................................................9
BLOCK DIAGRAM...................................................12
DISCRIPTION OF BLOCK DIAGRAM .................. 14
ADJUSTMENT ...................................................... 16
SERVICE MODE ......................................................... 18
TROUBLESHOOTING GUIDE .............................. 19
WIRING DIAGRAM ................................................... 25
EXPLODED VIEW...................................................... 26
REPLACEMENT PARTS LIST ................................. 28
DIFFERENT PARTS LIST…......................................... 37
SCHEMATIC DIAGRAM.............................................. 38
SPECIFICATIONS
1.LCDCHARACTERISTICS
Type: matrix-TFT Color LCD Module
Active Display Area: 21.53 inches
Pixel Pitch: 0.248 (H) x 0.248 (V)mm
Color Depth: 16.7M colors
Size: 495.6(W) x 292.2(H) x 16.35(D) mm(Typ.)
Display Mode: LTN Mode, Normally White
Surface Treatment: Anti-Glare, 3H
Electrical Interface: Dual channel LVDS
2. OPTICAL CHARACTERISTICS
2-1. Viewing Angle by Contrast Ratio > 10
Left: 150°min, 170°(Typ) Right: 150°min, 170°(Typ)
Top: 140° min, 160°(Typ) Bottom: 140°min,160°(Typ)
2-2. White Luminance ( Center ): 300Cd / m2(Typ)
2-3. Contrast Ratio: 600(min), 1000(Typ)
3. SIGNAL (Refer to the Timing Chart)
3-1. Sync Signal
Type: Separate Sync, SOG (Sync On Green) / Digital
3-2. Video Input Signal
1) Type: R, G, B Analog, Digital
2) Voltage Level: 0~0.7 Vp-p
3) Input impedance: 75 
3-3. Operating Frequency
Horizontal: 30 ~ 83kHz
Vertical: 56 ~ 75Hz
4. Max. Resolution
D-sub Analog: VESA 1920 x 1080 @ 60 Hz
5. POWER SUPPLY
5-1. Power: AC 100-240V~ 50/60Hz 1.0A
5-2. Power Consumption
On Mode: 40 W(Typ.)
Sleep Mode: 1 W
Off Mode: 1 W
6. ENVIRONMENT
6-1. Operating
Temperature: 10°C~35°C
Humidity: 10 % to 80 % non-Condensing
6-2. Storage
Temperature: -20°C to 60 °C
Humidity: 5 % to 90 % non-Condensing
6-3. MTBF: 70000 Hours (Not include panel)
Lamp Life: 50000 Khrs
7. DIMENSIONS (with Stand)
Width: 51.64 cm (20.33 inches)
Depth: 19.80 cm (7.80 inches)
Height: 39.61 cm (15.59 inches)
8. WEIGHT (excl. packing)
Weight: 3.8 kg (8.38 lbs)
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TIMING CHART
Mode Section Polarity
DOT
CLOCK
[MHz]
Frequency
[kHz]/[Hz]
Total
Period(E)
Display
(A)
Front
Porc
h
(D)
Syn
c.
(C)
Back
Porch
(B)
Resol-
ution
H(Pixels) + 31.469 800 640 16 96 48
1
V(Lines) -
25.175
70.09 449 350 37 2 60
640 x
350
H(Pixels) - 31.468 900 720 18 108 54
2
V(Lines) +
28.321
70.08 449 400 12 2 35
720 X
400
H(Pixels) - 31.469 800 640 16 96 48
3
V(Lines) -
25.175
59.94 525 480 10 2 33
640 x
480
H(Pixels) - 37.5 840 640 16 64 120
4
V(Lines) -
31.5
75 500 480 1 3 16
640 x
480
H(Pixels) + 37.879 1056 800 40 128 88
5
V(Lines) +
40.0
60.317 628 600 1 4 23
800 x
600
H(Pixels) + 46.875 1056 800 16 80 160
6
V(Lines) +
49.5
75.0 625 600 1 3 21
800 x
600
H(Pixels) +/- 49.725 1152 832 32 64 224
7
V(Lines) +/-
57.283
74.55 667 624 1 3 39
832 x
624
H(Pixels) - 48.363 1344 1024 24 136 160
8
V(Lines) -
65.0
60.0 806 768 3 6 29
1024 x
768
H(Pixels) - 60.123 1312 1024 16 96 176
9
V(Lines) -
78.75
75.029 800 768 1 3 28
1024 x
768
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Mode Section Polarity
DOT
CLOCK
[MHz]
Frequency
[kHz]/[Hz]
Total
Period(E)
Display
(A)
Front
Porch
(D)
Sync
.
(C)
Back
Porch
(B)
Resol-
ution
H(Pixels) +/- 68.681 1456 1152 32 128 144
10
V(Lines) +/-
100.0
75.062 915 870 3 3 39
1152 x
870
H(Pixels) +/- 61.805 1504 1152 18 134 200
11
V(Lines) +/-
92.978
65.96 937 900 2 4 31
1152 x
900
H(Pixels) + 63.981 1688 1280 48 112 248
12
V(Lines) +
108.0
60.02 1066 1024 1 3 38
1280 x
1024
H(Pixels) + 79.976 1688 1280 16 144 248
13
V(Lines) +
135.0
75.035 1066 1024 1 3 38
1280 x
1024
H(Pixels) + 64.674 1840 1680 48 32 80
14
V(Lines) -
119.00
59.883 1080 1050 3 6 21
1680 x
1050
H(Pixels) - 65.290 2240 1680 104 176 280
15
V(Lines) +
146.250
59.954 1089 1050 3 6 30
1680 x
1050
H(Pixels) + 63.981 1688 1280 48 112 248
16
V(Lines) +
105.982
60.02 1062 1024 1 3 34
1280 x
1024
H(Pixels) + 67.5 2200 1920 88 44 143
17
V(Lines) +
148.50
60 1125 1080 4 5 36
1920 x
1080
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DISASSEMBLY-Set
#1
Put the monitor on a soft flat.
#2
Revolve the release button.
#3
Consequently, pull the base directly.
#4
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The base.
#5
Put the front cover upward. Then let the all
latches are separated.
#6
Put the front face down, disassembly back
cover.
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#7
Pull the key board out of bezel.
＃8
Disassembly the bezel.
#9
Disassembly the LVDS cable.
#10
Disassemble the connector.
#11
Main board and power board.
#12
The panel.
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#13
Rear cover and hinge ASS’Y.
#14
Disassemble the rear cover and hinge ASS’Y.
#15
Disassemble the hinge and stand.
#16
Hinge top, hinge and stand.
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BLOCK DIAGRAM
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BLOCK DIAGRAM-POWER
Power
Inverter
EMI filter RectificationTransformer
5V/16V
output OVP
Feedback
control
circuit
Switching
circuit (PWM
control IC &
MOSFER)
OVP protect
circuit
Diode
rectifier
Starting
resistor
16V
Rush
prevention
ON/OFF
DIM
Push-pull
circuit
Transformer
conversion
LC resonance
VDDA
ON/OFF circuit
PWM IC
ta9687GN
Feedback
circuit
OVP circuit 2 CCFL lamps
Sampling Lamp open
protection
DIM circuit
16V
5V
100~240V
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DESCRIPTION OF BLOCK DIAGRAM
1. Video Controller Part.
This part amplifies the level of video signal for the digital conversion and converts from the analog video signal to
the digital video signal using a pixel clock.
The pixel clock for each mode is generated by the PLL.
The range of the pixel clock is from 25MHz to 148.5MHz.
This part consists of the Scalar, ADC converter, TMDS receiver and LVDS transmitter.
The Scalar gets the video signal converted analog to digital, interpolates input to 1920 X 1080 resolution signal and
outputs 8-bit R, G, B signal to transmitter.
2. Power Part.
This part consists of the one 3.3V, and one 1.8V regulators to convert power which is provided 5V in Power board.
16V is provided for inverter, 5V is provided for LCD panel.
Also, 5V is converted 3.3V and 1.8V by regulator. Converted power is provided for IC in the main board.
The inverter converts from DC 16V to AC 700Vrms and operates back-light lamps of module.
3. MICOM Part.
This part is including video controller part. And this part consists of Reset IC and the Micom.
The Micom distinguishes polarity and frequencies of the H/V sync are supplied from signal cable.
The controlled data of each mode is stored in scalar.
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LIPS Board Block Diagram
Operation Description_LIPS
1. EMI components.
This part contains of EMI components to comply with global marketing EMI standards like FCC, VCCI CISPR, the
circuit included a line-filter, across line capacitor and of course the primary protection fuse.
2. Input rectifier and filter.
This part function is for transfer the input AC voltage to a DC voltage through a bridge rectifier and a bulk capacitor.
3. Energy Transfer.
This part function is for transfer the primary energy to secondary through a power transformer.
4. Output rectifier and filter.
This part function is to make a pulse width modulation control and to provide the driver signal to power switch, to
adjust the duty cycle during different AC input and output loading condition to achieve the dc output stabilized, and
also the over power protection is also monitor by this part.
5. Photo-Coupler isolation.
This part function is to feed back the DC output changing status through a photo transistor to primary controller to
achieve the stabilized DC output voltage.
6. Signal collection.
This part function is to collect the any change from the DC output and feed back to the primary through photo
transistor.
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ADJUSTMENT
Windows EDID V1.0 User Manual
Operating System: DOS, windows98, 2000, XP
1. Parallel port setting
Enter your bios, and do as followings.
a) Integrated peripheral
b) Super IO Device
c) Parallel port mode
you should set the” parallel port mode” to SPP for using the DOS EDID tool surely.
2. EDID Write
1、Connect the signal line of monitor with DDC recorder.
2、Choose the DDC RECORD program, and it shows on the screen, the choose the correct source base on the
monitor.
3、Click “LoadFile” ,then key in the manufacturer name、model name、product code, then choose the
correct model name base on the monitor.(as Fig.2)
4、Scan serial No. to DDC recorder by Bar Reader, then read again in the Verify SN.
5、According to the message of DDC program, when the picture as fig.1 appears, it show DDC record has finished.
Fig.1
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Please check Manufacturer Name、Vendor Assigned Code、Monitor Name、Serial Number：*****[????????
******] (it must be the same as Bar Code)、Week of Manufacture：**、Year of Manufacture：****、Check
sum：** (It must be the same as the last byte of data table, as follows picture shows). Above of all must
be right, then if it shows the green “PASS”, it means record succeeds ,the red “Fail” means record fails;
then check the power supply and signal line, and ensure they are connected well ,then do DDC record
again from the third step.
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Fig.2
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1) Turn off the power switch at the front side of the display.
2) Wait for about 5 seconds and press MENU, POWER switch with 1 second interval.
3) The SVC OSD menu contains additional menus that the User OSD menu as described below.
a) CLEAR ETI: To initialize using time.
b) Auto Color: W/B balance and automatically sets the gain and offset value.
c) AGING: Select Aging mode (on/off).
d) PANEL: used panel type
e) NVRAM INIT: NO
f) R/G/B-9300K: Allows you to set the R/G/B-9300K value manually.
g) R/G/B-6500K: Allows you to set the R/G/B-6500K value manually.
h) R/G/B-Offset: Allows you to set the R/G/B-Offset value manually. (Analog Only)
i) R/G/B-Gain: Allows you to set the R/G/B-Gain value manually. (Analog Only)
Figure 1 Cable Connection for Micom uploading
SERVICE MODE
Connect to
the PC Connect to
the monitor
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TROUBLESHOOTING GUIDE
No Power
(Power Indicator Off)
Please reinsert and
make sure the AC of
100-240v is normal
Measure U704
PIN2=1.8V
U703 PIN2=3.3V
Check the Adapter/Inverter
section
Check CN701 or replace
U704, and U703
NO
NO
YES
YES
1. NO POWER
Check X401 oscillate
waveforms are normal
Replace X401
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Replace U401
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NO
YES
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2. NO RASTER (OSD IS NOT DISPLAY)-LIPS
LIPS
Check U704 PIN 2
1.8V?
1. Check U704
2. Check C704
3. TROUBLE IN SCALER IC
NO
No Raster
(OSD Is Not Displayed)
Check U703
PIN 2 =3.3V?
Check CN701
PIN 6, PIN7 =5V?
Check power board and find out a
short point as penning each power
line
1. Check U703
2. Check C706,C707
NO
NO
YES
YES
YES
Check CN701
PIN 6, PIN7 =5V?
YES
NO Check BL ON/OFF pulse as
contacting scope
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