LG Flatron L1710M User manual

COLOR MONITOR
SERVICE MANUAL
Website:http://biz.LGservice.com
E-mail:http://www.LGEservice.com/techsup.html
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS NO. : CL-61
MODEL: L1710M
(L1710MM-AL**R)
( ) **Same model for Service
*To apply the Mstar Chip.

- 1 -

1. LCD CHARACTERISTICS
Type : TFT SXGA LCD
Size : 17 inch
Pixel Pitch : 0.264 (H) x 0.264 (V)
Color Depth : 16.2M colors
Electrical Interface : LVDS
Surface Treatment : Hard-coating(3H)
Operating Mode : Normally White
Backlight Unit : Top/Bottom edge side 4-CCFL
(Cold Cathode Fluorescent Lamp)
2. OPTICAL CHARACTERISTICS
2-1. Viewing Angle by Contrast Ratio
≥ 10
Left : -60° min., -70°(Typ) Right : +60° min., +70°(Typ)
Top :+45° min., +60°(Typ) Bottom : -45°min., -60°(Typ)
2-2. Luminance : 200(min), 250(Typ)
2-3. Contrast Ratio : 300(min), 450(Typ)
3. SIGNAL (Refer to the Timing Chart)
3-1. Sync Signal
• Type : Separate Sync,
SOG (Sync On Green)
Composite Sync, Digital
3-2. Video Input Signal
1) Type : R, G, B Analog
2) Voltage Level : 0~0.71 V
a) Color 0, 0 : 0 Vp-p
b) Color 7, 0 : 0.467 Vp-p
c) Color 15, 0 : 0.714 Vp-p
3) Input Impedance : 75 Ω
3-3. Operating Frequency
Horizontal : 30 ~ 83kHz
Vertical : 56 ~ 75Hz
4
. Max. Resolution
Analog : 1280 x 1024 / 75Hz
5. POWER SUPPLY
5-1. Power
: AC 100-240V~, 50/60Hz , 1.0A
5-2. Power Consumption
6. ENVIRONMENT
6-1. Operating Temperature: 10°C~35°C (50°F~95°F)
(Ambient)
6-2. Relative Humidity : 10%~80%
(Non-condensing)
6-3. MTBF : 50,000 Hours(Min)
7. DIMENSIONS (with TILT/SWIVEL)
Width : 376 mm (14.80'')
Depth : 222.4 mm (8.75'')
Height : 427 mm (16.81'')
8. WEIGHT (with TILT/SWIVEL)
Net. Weight : 5.85 kg (12.89 lbs)
Gross Weight : 7.3 kg (16.09 lbs)
9. Audio
RMS Audio Output : 1W + 1W(R+L)/10%
Input Sensitivity : 0.700Vrms
Speaker Impedance : 16
Ω
CONTENTS
SPECIFICATIONS
- 2 -
SPECIFICATIONS ................................................... 2
PRECAUTIONS ....................................................... 3
TIMING CHART ....................................................... 4
OPERATING INSTRUCTIONS ................................ 5
WIRING DIAGRAM ................................................. 6
BLOCK DIAGRAM ................................................... 7
DESCRIPTION OF BLOCK DIAGRAM.....................8
ADJUSTMENT ...................................................... 10
TROUBLESHOOTING GUIDE .............................. 12
EXPLODED VIEW...................................................16
REPLACEMENT PARTS LIST ...............................18
SCHEMATIC DIAGRAM......................................... 21
MODE
POWER ON (NORMAL)
STAND-BY
SUSPEND
DPMS OFF
H/V SYNC
ON/ON
OFF/ON
ON/OFF
OFF/OFF
POWER CONSUMPTION
less than 43 W
less than 2 W
less than 2 W
less than 2 W
LED COLOR
GREEN
AMBER
AMBER
AMBER
VIDEO
ACTIVE
OFF
OFF
OFF

- 3 -
WARNING FOR THE SAFETY-RELATED COMPONENT.
• There are some special components used in LCD
monitor that are important for safety. These parts are
marked on the schematic diagram and the
replacement parts list. It is essential that these critical
parts should be replaced with the manufacturer’s
specified parts to prevent electric shock, fire or other
hazard.
• Do not modify original design without obtaining written
permission from manufacturer or you will void the
original parts and labor guarantee.
TAKE CARE DURING HANDLING THE LCD MODULE
WITH BACKLIGHT UNIT.
• Must mount the module using mounting holes arranged
in four corners.
• Do not press on the panel, edge of the frame strongly
or electric shock as this will result in damage to the
screen.
• Do not scratch or press on the panel with any sharp
objects, such as pencil or pen as this may result in
damage to the panel.
• Protect the module from the ESD as it may damage the
electronic circuit (C-MOS).
• Make certain that treatment person’s body are
grounded through wrist band.
• Do not leave the module in high temperature and in
areas of high humidity for a long time.
• The module should not be exposed to the direct
sunlight.
• Avoid contact with water as it may bring a short circuit
within the module.
• If the surface of the panel become dirty, please wipe it
off with a soft material. (Cleaning with a dirty or rough
cloth may damage the panel.)
WARNING
BE CAREFUL ELECTRIC SHOCK !
• If you want to replace with the new backlight (CCFL) or
inverter circuit, disconnect the AC adapter because
high voltage about 650Vrms appears at inverter circuit .
• Handle with care wires or connectors of the inverter
circuit. If the wires are pressed, because of short it may
burn or take fire.
PRECAUTION
CAUTION
Please use only a plastic screwdriver to protect yourself
from shock hazard during service operation.

TIMING CHART
- 4 -
VIDEO
SYNC
B
D
CFE
A
<< Dot Clock (MHz), Horizontal Frequency (kHz), Vertical Frequency (Hz), Horizontal etc... (µs), Vertical etc... (ms) >>
H + 31.469 800 640 16 96 48
V–70.8Hz 449 350 37 2 60
H–31.469 840 640 16 96 48
V–59.94 525 480 10 2 33
H–37.5 840 640 16 64 120
V–75 500 480 1 3 16
H–31.468 900 720 18 108 54
V + 70.09 449 400 12 2 35
H + 37.879 1056 800 40 128 88
V + 60.317 628 600 1 4 23
H + 46.875 1056 800 16 80 160
V + 75.0 625 600 1 3 21
H+/–49.725 1152 832 32 64 224
V+/–74.55 667 624 1 3 39
H–48.363 1344 1024 24 136 160
V–60.0 806 768 3 6 29
H–60.123 1312 1024 16 96 176
V–75.029 800 768 1 3 28
H+/–68.681 1456 1152 32 128 144
V+/–75.062 915 870 3 3 39
H+/–61.805 1504 1152 18 134 200
V+/–65.96 937 900 2 4 31
H + 63.981 1688 1280 48 112 248
V + 60.02 1066 1024 1 3 38
H + 79.976 1688 1280 16 144 248
V + 75.035 1066 1024 1 3 38
Mode H/V
Sort
1
2
3
4
5
6
7
8
9
10
11
12
13
25.175
28.321
25.175
31.5
40.0
49.5
57.283
65.0
78.75
100.0
92.978
108.0
135.0
640x350
70Hz
640x480
60Hz
640x480
75Hz
720x400
70Hz
800x600
60Hz
800x600
75Hz
832x624
75Hz
1024x768
60Hz
1024x768
75Hz
1152x870
75Hz
1152x900
65Hz
1280x1024
60Hz
1280x1024
75Hz
Sync
Polarity Frequency
Dot
Clock Total Period
(E)
Video Active Time
(A)
Sync Duration
(D)
Back Porch
(F)
Front Porch
(C)
Resolution

- 5 -
FRONT VIEW
Front Control Panel
REAR VIEW
OPERATING INSTRUCTIONS
Front Control Panel Headphone/
Earphone Input
65 2 3 4 1
1. Power Button
Use this button to turn the display on or off.
<Power (DPMS) Indicator>
This Indicator lights up green when the display
operates normally. If the display is in DPM (Energy
Saving) mode, this indicator color changes to
amber.
2. Menu Button
Use this button to enter or exit the On Screen
Display.
3. Button
Use these buttons to choose or adjust items in the
On Screen Display.
Volume:
Use these buttons to decrease or increase the
volume level.
100
100
• Bring up Contrast and Brightness
adjustment.
37
REAR VIEW(BOTTOM)
Power Connect D-Sub ConnectAUDIO
IN MICROPHONE IN MICROPHONE OUT

4. AUTO/ SELECT Button
Use this button to enter a selection in the On
Screen Display.
5. Light view
ButtonThis function optimizes the
brightness, contrast or color value
to the surrounding conditions and
settings and enables you to enjoy
the most suitable picture by
adjusting the surroundings
(DAY/NIGHT/USER MODE).
• TEXT: For viewing letters
• MOVIE: For viewing movies
• PHOTO: For viewing pictures or the photographs
• USER MODE: This function memorizes the manual
adjustment -Brightness, Contrast and Color value on
the On Screen Display.
6. MUTE Button
Used to select mute on (means sound off) and
mute off (means sound on).
CONTROLS LOCKED/UNLOCKED
:
MENU and Button
- 6 -
Front Control Panel
When adjusting your display
settings, always press the
SELECT/AUTO button before
entering the On Screen
Display(OSD). This will automatically adjust your display
image to the ideal settings for the current screen
resolution size (display mode).
The best display mode is 1280x1024.
This function allows you to secure the
current control settings, so that they
cannot be inadvertently changed.
Press and hold the MENU button and
button for 3 seconds: the message
“CONTROLS LOCKED” appears.
You can unlock the OSD controls at any time by pushing the
MENU button and button for 3 seconds:
the message “CONTROLS UNLOCKED” will appear.
37
J708 J702
J706
J707
CN2 CN1
CN4 CN3
CN10
J902
J902
J1
WIRING DIAGRAM
Connector Ass’y P/N:
6631T20024C
Connector Ass’y P/N:
6631T20024C
Connector Ass’y P/N:
6631T20010B
Connector Ass’y P/N:
6631T20020Q
Connector Ass’y P/N:
6631T11012W

- 7 -
5V
MST9111 B including (ADC/LVDS/SCALER )
Panel
MCU
(MTV312)
EEPROM
(System)
LVDS
Analog(R/ G/B)
D-Sub
To Key Con
trol
5V
3.3V
2.5V
3.3V
2.5V
Brt_Ctl / Inv_Ctl
LIPS
Audio
Processor
Audio
Amp
12 V
SCL
SDA
Mute
12 V
8V
SCL SDA
12 V
Audio In
Mute Head
phone
Regula tor Regula tor Regula tor
Spea ker
Left
Spea ker
Right
(TDA7 44 9)
(TPA6 03 0A)
BLOCK DIAGRAM

- 8 -
DESCRIPTION OF BLOCK DIAGRAM
1. Video Controller Part & Display Data Transmitter Part.(MST9111B)
This part amplifies the level of the video signal for digital conversion and converts 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 135MHz.
This part consists of the Scaler.
The Scaler gets the video signal which is converted from analog to digital, interpolates input to 1280 °ø 1024
resolution signal and outputs 8-bit R, G, B signal to transmitter.
Especially pre-amp / ADC / Video controller/ Transmitter are merged to one chip "MST9111"by MSTAR.
This part transmits digital signal from the Scaler to the receiver of module.
2. Micom Part
This Part consists of EEPROM IC which stores control data, Reset IC and the Micom.
The Micom distinguishes polarity and frequency of the H/V Sync is supplied from signal cable.
The controlled data of each mode is stored in EEPROM.
3. Power Part
This part consists of the one 3.3V and one 2.5 regulators to convert power which is provided 5V in LIPS Board.
5V is provided for LCD Panel.
Also, 5V is converted to 3.3V and 2.5V by regulator. Converted power is provided for IC in the main board.

- 9 -
EMI
COMPONENTS
LINE
100 ~ 240V
INPUT RECTIFIER
AND FILTER ENERGY TRANSFER OUTPUT RECTIFIER AND FILTER
12V
5V
GND
SIGNAL
COLLECTI
ON
PHOTO-
COUPLER
ISOLATION
PWM
CONTROL
CIRCUIT
HVDC 100KHz
PRIMARY SECONDARY
50 ~ 60Hz
Operation description_LIPS
LIPS Board Block Diagram
1. EMI components.
This part contains of EMI components to comply with global marketing EMI standards like FCC,VCCI CISPR,
the line-filter-built-in circuit, across line capacitor and the primary protection fuse of course.
2. Input rectifier and filter.
The function of this part is to transfer the input AC voltage to a DC voltage through a bridge rectifier and a bulk
capacitor.
3. Energy Transfer.
The function of this part is to transfer the primary energy to secondary through a power transformer.
4. Output rectifier and filter.
The function of this part is to make a pulse width modulation control ,to provide the driver signal to power switch,
and to
adjust the duty cycle during different AC input and output loading condition to achieve the dc output stabilization.
The over power protection is also monitored by this part.
5. Photo-Coupler isolation.
The function of this part 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.
The function of this part is to collect any change from the dc output and feed-back to the primary through photo
transistor.