Website:http://biz.LGservice.com E-mail:http://www.LGEservice.com/techsup.html COLOR MONITOR SERVICE MANUAL CHASSIS NO. : CL-56 MODEL: L172WT (L172WAL-AL**T) ) **Same model for Service CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
Signal Connector Pin Assignment • DVI-D Connector (Digital) Signal (DVI-D) Signal (DVI-D) T. M. D. S. Data2- Hot Plug Detect T. M. D. S. Data2+ T. M. D. S. Data0- T. M. D. S. Data0+ T. M. D. S. Data2/4 Shield T.
PRECAUTION WARNING FOR THE SAFETY-RELATED COMPONENT. WARNING BE CAREFUL ELECTRIC SHOCK ! • There are some special components used in LCD monitor that are important for safety. These parts are • If you want to replace with the new backlight (CCFL) or marked on the schematic diagram and the inverter circuit, must disconnect the AC adapter...
TIMING CHART VIDEO SYNC << Dot Clock (MHz), Horizontal Frequency (kHz), Vertical Frequency (Hz), Horizontal etc... (µs), Vertical etc... (ms) >> Total Period Video Active Time Front Porch Sync Duration Back Porch Sync Mode Resolution Frequency Clock Sort Polarity 31.469 640x350 25.175 70Hz...
OPERATING INSTRUCTIONS Front Control Panel • This Indicator lights up green when the display operates normally. If the display is in DPM Power LED (Energy Saving) mode, this indicator color changes to amber. Power Button • Press the button to turn on the power. Press the button again to turn it off. MENU Button •...
TV: Automatic TV channel setup Button PC: Automatic adjustment function Operational at the TV mode only (Operational for the analog signal only) Sound Mode Select Select the sound mode : MONO/STEREO/SAP CAPTION Button Video Operation Button Applicable for LG products only - 8 -...
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• Input Select Button • TV/AV Button If you press the button once, This button will be enabled only the following Input Signal when you selected the TV/AV Window will appear. Select signal. The signal type will be the signal type you want changed with the following order.
DISASSEMBLY 1.BACK CAP REMOVAL 1)Remove the Back cap. 2. TV TUNER REMOVAL 1)Remove the screw(a). 2)Remove the Tuner. CAUTION To prevent scratches on the back cover, make sure to detach the tuner before detaching the back cover. - 10 -...
DESCRIPTION OF BLOCK DIAGRAM 1. Input Signal Part 6. Audio decoder part. It is composed of four parts. This block is composed of MSP3420G (U503) and -PC signal input part:24pin DVI-I and PC Audio input peripheral devices. jack. This IC analyzes Audio input signal through A/V Jack -AV Video input part: RCA Jack (CVBS signal), S-Video and PC audio.
ADJUSTMENT Windows EDID V1.0 User Manual 2. EDID Read & Write Operating System: MS Windows 98, 2000, XP 1) Run WinEDID.exe Port Setup: Windows 98 => Don’t need setup Windows 2000, XP => Need to Port Setup. This program is available to LCD Monitor only. [Analog EDID] At first select "DVI-Analog"...
SERVICE OSD SETUP SETUP MODEL L172WA L MODEL L172WA L NVRAM INITIAL NVRAM INITIAL ELAPSED TIME 21 H ELAPSED TIME 21 H MICOM VERSION Ver. 49 MICOM VERSION Ver. 49 VCHIP TEST VCHIP TEST UP / DOWN SELECT UP / DOWN SELECT 1.
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SETUP SETUP MODEL L172WAL MODEL L172WAL NVRAM INITIA NVRAM INITIA ELAPSED TIME 21 H ELAPSED TIME 21 H MICOM VERSION Ver. 49 MICOM VERSION Ver. 49 VCHIP TEST VCHIP TEST UP / DOWN SELECT UP / DOWN SELECT 7. Use this menu to adjust white balance. 8.
TROUBLESHOOTING GUIDE 1. NO POWER NO POWER (POWER INDICATOR OFF) CHECK J601 CHECK LIPS POWER VOLTAGE BOARD (33V, 12V, 5V)? CHECK X401 CHECK X401 (14.318MHz) ? CHECK DATA LINE of CHECK MICOM(U402) U403 ? CHECK KEY CONTROL BOARD - 16 -...
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2. NO RASTER(OSD IS NOT DISPLAYED) NO RASTER (OSD IS NOT DISPLAYED) CHECK THE PERIPHERAL CHECK U402? IC U402 CHECK CHECK THE PERIPHERAL LVDS OUTPUT IC U402 (J401)? CHECK BOTTOM OF LIPS CHECK (Q201~Q204) LIPS POWER CHECK INVERTER CABLE - 17 -...
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3. NO RASTER ON VIDEO SIGNAL INPUT NO RASTER ON VIDEO SIGNAL CHECK CABLE OF VIDEO/COMPONENT CHECK THE PERIPHERAL IC CHECK VPC3230(U203) I/O SIGNAL OF VPC3230(U203) CHECK THE PERIPHERAL IC CHECK GM1501(U402) OF GM1501(U402) - 18 -...
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4. NO RASTER ON TV SIGNAL INPUT NO RASTER ON TV SIGNAL POWER CHECK OF TUNER(TU701) : L701(33V), L702(5V) POWER CHECK OF VPC3230(U203) :L205(5V), L213(3.3V) POWER CHECK OF GM1501(U402) CHECK CONNECTION OF TV TUNER AND ANTENNA CHECK TV CH SELECT AUTO CH OF OSD CHECK THE PERIPHERAL IC CHECK VPC3230(U203) I/O OF VPC3230(U203)
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5. SOUND TROBLE SHOOTING NO SOUND OUTPUT POWER CHECK OF MSP3420G(U503) : L514(8V), L509(5V) POWER CHECK OF TPA3004(U505) : C550(12V) CHECK SOUND OF VCR, HDTV,PC (TV)CHECK CONNECTION OF TUNER AND ANTENNA CHECK SOUND INPUT =>PC SOUND(J505) =>VIDEO, HDTV SOUND CHECK THE PERIPHERAL IC OF CHECK MSP3420G(U503) I/O SIGNAL MSP3420G(U503) INPUT: CHECK THE PERIPHERAL IC...
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6. NO RASTER STATE ON ANALOG SIGNAL NO RASTER ON ANALOG SIGNAL POWER CHECK OF BA7657(U103) : L102(5V) POWER CHECK OF GM1501(U402) POWER CHECK OF LVDS OUTPUT: J401 CONNECTOR(J102) CHECK CHECK I/O SYNC OF BA7657(U103) CHECK ADC INPUT SIGNAL IN CHECK THE PERIPHERAL IC GN1501(U402) OF DVI-A(J102)
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7. NO RASTER STATE ON DIGITAL SIGNAL NO RASTER STATE ON DIGITAL SIGNAL POWER CHECK OF GM1501(U402) POWER CHECK OF LVDS OUTPUT: J401 CONNECTOR(J102) CHECK CHECK THE PERIPHERAL IC CHECK GM1501(U402) I/O SIGNAL OF GM1501(U402) CHECK THE PERIPHERAL IC CHECK LVDS I/O SIGNAL OF GM1501(U402) - 22 -...
REPLACEMENT PARTS LIST CAUTION: BEFORE REPLACING ANY OF THESE COMPONENTS, READ CAREFULLY THE SAFETY PRECAUTIONS IN THIS MANUAL. * NOTE SAFETY Mark AL ALTERNATIVE PARTS DATE: 2003. 12. 15. DATE: 2003. 12. 15. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC.
PIN CONFIGURATION BA7657 Multimedia ICs BLOCK DIAGRAM Red 1 input HD 1 input HD Sync Signal detector HD 2 input Green 1 input HD output Ground Red output DET. Blue 1 input Ground Green output Composite video input Red 2 input (Sync on Green) Syncsepa Ground...