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Table of Contents
Related Manuals for LG 47LB1DA 1080p LCD
Summary of Contents for LG 47LB1DA 1080p LCD
- Page 1 TRAINING MANUAL 47LB1DA 1080p LCD Spring 2007 Service Digital Display...
- Page 2 Special components are also used to prevent shock and fire hazard and are required to maintain safe performance. No deviations are allowed without prior approval by LG Electronics. Service work should be performed only after you are thoroughly familiar with these safety checks and servicing guidelines.
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Page 3: Table Of Contents
TABLE OF CONTENTS OVERVIEW ......................5 INTRODUCTION ....................5 XD ENGINE ......................5 COMPUTER CONNECTION ..................5 SERIAL NUMBER STRUCTURE .................. 6 LOCK SYSTEM ...................... 6 SET PASSWORD ....................7 MOUNTING INTERFACE ..................7 SERVICE MENU ....................8 SERVICE REMOTE ....................9 THEORY ....................... - Page 4 - 4 -...
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Page 5: Overview
PC output to a format listed in the chart. XD ENGINE XD is LG Electronic’s unique picture improving technology using an advanced digital signal processing algorithm. When selecting EZ Picture options (Daylight, Normal and Night time), XD is automatically changed to Auto. -
Page 6: Serial Number Structure
OVERVIEW SERIAL NUMBER STRUCTURE 1 2 3 4 5 6 7 8 9 10 11 12 13 14 \____/ \__/ \__/ \______________/ à Sequential Number (XXXXXXX), 5 to 7 digits (Number or Alphabet) à Secret Code (VV), 2 digits (Alphabet) à... -
Page 7: Set Password
OVERVIEW SET PASSWORD Change the password by inputting a new password twice. 1) After inputting the password, use the up or down Lock System arrows to choose Set password. Set Password 2) Press the right arrow and then choose any 4 digits Block Channel Confirm Movie Rating... -
Page 8: Service Menu
OVERVIEW SERVICE MENU EXPERT MODE CALIBRATION MENU Input Hold the MENU Key until Pic. Mode ENTER PASSWORD appears on the 1. Contrast screen, Press remote key sequence 8-7-4-1 2. Brightness 3. Color 4. Tint 5. Sharpness 6. R. Gain 7. G Gain 8. -
Page 9: Service Remote
OVERVIEW SERVICE REMOTE NUM KEY FUNCTION POWER To turn the TV on or off POWER ON To turn the TV on automatically if the pow er is supplied to the TV. Use the POWER key to deactivate; It should be deactivated w hen delivered. MUTE To activate the mute function. - Page 10 - 10 -...
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Page 11: Theory
THEORY THEORY Liquid Crystals Polarizer This section covers how an LCD Display works. Color Filters LIQUID CRYSTAL DISPLAY A Liquid Crystal Display is composed of a light source Back Light (backlight), a Liquid Crystal Panel, and a driving circuit. We start with a light source at the back of the panel composed Polarizer of thin fluorescent bulbs (CCFLs - Cold Cathode Flouresent... -
Page 12: Liquid Crystal Panel
THEORY LIQUID CRYSTAL PANEL Below (on the left) is a cross section of a liquid crystal panel. The key to an LCD's operation is the polarizers. The polarizers only allow a certain wavelength of light to pass through. The two polarizers are mounted at a 90 degree angle with respect to each other, which prevents light from passing through. -
Page 13: Circuit Descriptions
CIRCUIT DESCRIPTIONS CIRCUIT DESCRIPTIONS POWER SUPPLY BLOCK DIAGRAM Directview LCD Training Circuit Descriptions... -
Page 14: Power Supply Specs
CIRCUIT DESCRIPTIONS POWER SUPPLY SPECS Max Output Output Voltage STB 5Vo 3.4V 12Vo 19Vo 24Vo 4.95 11.4 22.8 Voltage Range ~ 5.45 ~ 3.6 ~ 6.3 ~ 12.6 ~ 20 ~ 25.2 Current Range [A] Max Ripple Output Voltage STB 5Vo STB 3.4Vo 12Vo 19Vo... -
Page 15: Video
CIRCUIT DESCRIPTIONS VIDEO VIDEO FLOWCHART Digital TV RF/Composite CIRCUIT DESCRIPTION The ATSC/NTSC tuner can receive both terrestrial analog and terrestrial digital signals. But the NTSC tuner can receive terrestrial analog only. Therefore if you run two displays at The same time, it is not possible to see two digital channels. -
Page 16: Audio
CIRCUIT DESCRIPTIONS DRIVER IC The Drive IC sends signals from deinterlacer to the TFT-PANEL. TCP TYPE DRIVER IC (Tape Carrier Package) GATE DRIVER IC(8EA): HORIZONTAL Sends signals from the data line to the TFT-Panel Gate in series. Each IC controls 128 lines horizontally. DRIVER IC SOURCE DRIVER IC(5EA): VERTICAL As the gate of the TFT-Panel is ON, pixel data is being sent from... - Page 17 CIRCUIT DESCRIPTIONS The MSP 44x0G has built-in automatic functions: The IC is able to detect the actual sound standard automatically (Automatic Standard Detection). Furthermore, pilot levels and identification signals can be evaluated internally with subsequent switching between mono/stereo/bilingual; no I interaction is necessary (Automatic Sound Selection).
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Page 18: I2C Flowchart
CIRCUIT DESCRIPTIONS I2C FLOWCHART Directview LCD Training Circuit Descriptions... - Page 19 - 19 -...
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Page 20: Troubleshooting
TROUBLESHOOTING TROUBLESHOOTING TEST POINTS SMPS Analog Board De-Interlace Board Connector Pin Stby Connector Pin Stby Connector Pin Stby P200 3.4 V P104 P406 3.4 V 5.9 V 5.9 V 6.0 V 1.4 V 0.5 V 12.3 V 6.0 V 0.5 V 12.3 V Digital Board Connector Pin Stby... -
Page 21: Power Supply Resistance Readings
TROUBLESHOOTING POWER SUPPLY RESISTANCE READINGS 47LB1DA POWER SUPPLY Resistances w ith Board Connected Resistances w ith Board Disconnected P202 P201 P200 P202 P201 P200 AC_DET 100.7 KOhm 19V 1.7 KOhm* 3.4V 1 KOhm* AC_DET 19V 2 KOhm* 3.4V 1 KOhm* PWR_NF 19V 1.7 KOhm* 3.4V 1 KOhm*... -
Page 22: Led Indicators
TROUBLESHOOTING LED INDICATORS Directview LCD Training Troubleshooting... -
Page 23: No Power
TROUBLESHOOTING NO POWER NO POWER Check power 120VAC cord, outlet, @SC100? breaker, etc. 160VDC or greater Replace @ cathode of D1 15 power supply to chassis ground Disconnect 5VSB on Replace P1604 P202 pin3 power supply 5VSB on P202 Reconnect P1604 5VSB on Replace Check/replace... - Page 24 TROUBLESHOOTING 3.4 STB Replace on pin 1 1 of IC504 analog board of analog board 2.2VDC Replace on P1610 Check fan analog board pin 4 Replace Replace 2.2VDC on digital board P1604 pin2 2.2VDC on Replace P202 pin2 wires 15VDCon Replace R107 to anode power supply...
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Page 25: Power Supply Schematic
15VDC 75VDC POWER SUPPLY SCHEMATIC 24VDC 24VDC P203 PINS 8 - 12 P204 PINS 8 - 12 P205 PINS 8 - 12 P206 PINS 8 - 12 383 VDC P203 PINS 3 - 7 P204 PINS 3 - 7 P205 PINS 3 - 7 P206 PINS 3 - 7 15VDC 14.29VDC... -
Page 26: Power Supply - Deep Sleep Mode
15VDC 75VDC POWER SUPPLY - DEEP SLEEP MODE 24VDC 24VDC P203 PINS 8 - 12 P204 PINS 8 - 12 P205 PINS 8 - 12 P206 PINS 8 - 12 383 VDC P203 PINS 3 - 7 P204 PINS 3 - 7 P205 PINS 3 - 7 P206 PINS 3 - 7 15VDC... -
Page 27: Power Supply - Run 160Vdc & Regulated 383Vdc
15VDC 75VDC POWER SUPPLY - RUN 160VDC & REGULATED 383VDC 24VDC 24VDC P203 PINS 8 - 12 P204 PINS 8 - 12 P205 PINS 8 - 12 P206 PINS 8 - 12 383 VDC P203 PINS 3 - 7 P204 PINS 3 - 7 P205 PINS 3 - 7 P206 PINS 3 - 7 15VDC... -
Page 28: Power Supply - Ac Detect & Relay Control
15VDC 75VDC POWER SUPPLY - AC DETECT & RELAY CONTROL 24VDC 24VDC P203 PINS 8 - 12 P204 PINS 8 - 12 P205 PINS 8 - 12 P206 PINS 8 - 12 383 VDC P203 PINS 3 - 7 P204 PINS 3 - 7 P205 PINS 3 - 7 P206 PINS 3 - 7 15VDC... -
Page 29: Power Supply - 24Vdc & 19Vdc Supply
15VDC POWER SUPPLY - 24VDC & 19VDC SUPPLY 75VDC 24VDC 24VDC P203 PINS 8 - 12 P204 PINS 8 - 12 P205 PINS 8 - 12 P206 PINS 8 - 12 383 VDC P203 PINS 3 - 7 P204 PINS 3 - 7 P205 PINS 3 - 7 P206 PINS 3 - 7 15VDC... -
Page 30: Power Supply - 6Vdc & 12Vdc Supply
15VDC 75VDC POWER SUPPLY - 6VDC & 12VDC SUPPLY 24VDC 24VDC P203 PINS 8 - 12 P204 PINS 8 - 12 P205 PINS 8 - 12 P206 PINS 8 - 12 383 VDC P203 PINS 3 - 7 P204 PINS 3 - 7 P205 PINS 3 - 7 P206 PINS 3 - 7 15VDC... -
Page 31: Defective Component
TROUBLESHOOTING DEFECTIVE COMPONENT Make sure the signal is a supported format Fh_Comp 480i: 15.75kHz Check CXA2181 (IC501) power, OSC, Y_in: 480p: 31.5kHz comp1(#41/42/43), comp2(#1/2/17), Fh_Comp 1080i: 33.75kHz RGB(#33/34/35/36/37) 720p: 45kHz Cb_in: Cr_in: Check CXA2181 (IC501) outputs #23(Y_out), #22(Cb_out), #21(Cr_out), #15(V), #16(H) R/B/G: Fh_RGB Fh_RGB,Fh_RGB different... -
Page 32: Defective Hdmi
TROUBLESHOOTING DEFECTIVE HDMI Check HDCP power (IC604) Power off and on Is there snow on the screen? MST3361 (IC603), #69/70 (IIC) (TV or STB/DVD...) SCL: Freq: 50kHz~400kHz SDA: Video is normal, but no sound? SEE NEXT PAGE Reload EDID data (IC605/IC606) RX0C-/+: Check MST3361 (IC603) inputs power, OSC, #25/26(RX1C-, RX1C+),... -
Page 33: Defective Rf
TROUBLESHOOTING DEFECTIVE RF Check RF input Check main picture and PIP Check the NTSC tuner 5V, 33V, & Video Out Check tuner connectors Check CXA2069 Power Pins - TV 15.75 kHz Check FMS6400 IC701 - 13.5 Mhz Rock: Power Pins - Yin IC705 - 27 MHz 15.75 kHz Check Upd64015... -
Page 34: Defective Rf 2
TROUBLESHOOTING DEFECTIVE RF 2 Main of D/W Mode normal in cable TV mode? Check the output of the tuner (TU1302) #6(5V) Check the output of the tuner (TU1302) #8(33V) Check the IIC control of the tuner (TU1302) Replace the Tuner (TU1302) Is the output of the tuner (TU1302) #16 normal? Sub(PIP) of D/W Mode normal in digital TV mode? Check the output of the... -
Page 35: Defective Rf 3
TROUBLESHOOTING DEFECTIVE RF 3 When the tuner output is normal: Sub of D/W Mode normal? Main of D/W Mode normal? Check CXA2069 (IC101) #42(9V) Check CXA2069 (IC101) #42(9V) Is the output of CXA2069 (IC101) Is the output of CXA2069 (IC101) #44 normal? #56 normal? Is the flat cable between P101 &... -
Page 36: Defective Digital
TROUBLESHOOTING DEFECTIVE DIGITAL Check RF input TPCLK Check ATSC/NTSC/OOB Tuner (TU1300) 5V, IF out TPSOP Check LGDT3703 (IC1305) inputs TPVALID power, OSC(25MHz), IF pin nTPERR Check LGDT3703 (IC1305) outputs TPDATA CLK, SOP, Valid, Error, Data CADTV Check CPLD (IC305) inputs Check POD Controller CLK, SOP, Valid, Error, Data LGDT3502B (IC1200) -
Page 37: No Audio - Composite & Component
TROUBLESHOOTING NO AUDIO - COMPOSITE & COMPONENT Check the audio input connections Check component 1/2/RGB audio input Check CXA2069(IC101) in/outputs #2(V_L), #4(V_R), #23(FV_L), #25(FV_R), #52(AV_L_OUT), #54(AV_R_OUT) Check MSP4450K(IC202) outputs Check MSP4450K(IC202) inputs #56(AV_L), #57(AV_R) #53(COMP1_L), #54(COMP1_R), #50(COMP2_L), #51(COMP2_R), #47(RGB_L), #48(RGB_R) Check MSP4450K(IC202) outputs #36(SC1_R), #37( SC1_L... -
Page 38: No Audio - Rf
TROUBLESHOOTING NO AUDIO - RF Check the Antenna connection Check the NTSC Tuner's (TU1302) #4(33v), #7(5V), #18(5V), #16(SoundIF) LRCK: 48kHz Check Connector P1611(#2) Check MSP4450K (IC202) inputs MCLK: 12.288MH #67 (M_SIF) Check MSP4450K (IC202) outputs #36(SC1_R), #37(SC1_L) Check connector P103(#16,#18) Check MC33078(IC1001) in/outputs &... -
Page 39: No Audio - General
TROUBLESHOOTING NO AUDIO - GENERAL ANALOG OUT DIGITAL OUT Check LGDT1102F (IC402) I2S outputs Check LGDT1102F (IC402) SPDIF outputs R434(LRCK), R435(SCK), R441(LRCH) R436(IEC958_OUT) Check connector P1611 #10(SCK), #12(LRCK), #LRCH(LRCH) Check EPM570T144 (IC301) Check MSP4450K (IC202) power pins #12/13/65/66(5V), #39(8V) Check SPDIF out (R1035) Check MSP4450K(IC202) inputs #19(SCK), #20(LRCK), #22(LRCH) MONITOR OUT... -
Page 40: Cablecard
TROUBLESHOOTING CABLECARD A cable card is a PCMCIA card distributed by cable operators and inserted into a Digital Cable Ready (DCR) TV to enable premium services like digital cable. It provides authorization, CA (Conditional Access) decryption and CP (Copy Protection) encryption functions for the consumer’s DCR TV. Note there is a seperate Training manuala nd training class devoted to DCR. - Page 41 TROUBLESHOOTING • If the second CableCARD fails to bring up the User Interface screen, the technician should refer to the diagnostic menus on the DCR for further troubleshooting. The technician can pull up the User Interface screen manually through the menu choices. •...
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Page 43: Dissasembly
DISASSEMBLY DISSASEMBLY EXPLODED VIEW LOCATION PART NUM DESCRIPTION 30919E0042G Cover Assembly, 47LB1DA-UB(CKD) LP62H 47" C/A ASSY FOR SET 30919E0042B Cover Assembly, 47LB1DA-UB LA61C 47" EAJ31412401 LCD,Module-TFT, LC470WU1-SLA1 1920X1080 550CD 3809900160E Cover Assembly, 47LB1DA-UB LA61C 47" FOR CKD(MX) 3809900160B Cover Assembly, 47LB1DA-UB LA61C 47" 3043900027C Base Assembly, STAND 47LB1R-ZH(CKD) LP62H BLACK 3043900027A Base Assembly, 47LB1 EBR30403401 PCB Assembly,Sub, CONTROL KEY TOTAL ASSY... -
Page 44: Back Cabinet Removal
DISASSEMBLY BACK CABINET REMOVAL 1) Remove the stand by removing the 6 screws holding it on. 2) Remove the 13 screws holding the back cover on. 3) Now re-install the four screws that se- cure the stand. 4) Remove the 12 screws that hold the shield on. -
Page 45: Board Descriptions
DISASSEMBLY BOARD DESCRIPTIONS Power Supply De-interlacer Lamp Ballast Side Inputs Control Panel Analog Board Digital Board POWER SUPPLY Output Voltages: +5V 2A +3.4V 5A +6V 5A +12V 3A +19V 3.5A +24V 12A DIGITAL BOARD The digital board contains the main micro, cable card slot, tuners, digital connections, and video processing. - Page 46 DISASSEMBLY ANALOG BOARD The analog board consists of the rear connections for external inputs and the Monitor output connections. The Analog and Digital RF Connections are also present on the Analog board. CXA2069 -The CXA2069Q is a 7-input, 3-output audio/ video switch featuring I²C bus compatibility for TVs.
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Page 47: Frame Removal
DISASSEMBLY FRAME REMOVAL Remove the frame to gain access to the lamp ballasts & LCD driver. 1) First remove the 4 screws holding power supply down to gain access to the two screws under- neath. 2) Remove the 8 black larger screws holding the frame to the LCD panel and the 16 screws on the outside of the frame holding it to the cabinet. - Page 50 © Copyright 2007 LG Electronics, Inc. Printed in the USA...