LG L1718S-BN Service Manual
LG L1718S-BN - LG - 17" LCD Monitor Manual
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LG L1718S-BN manual content summary:
- LG L1718S-BN | Service Manual - Page 1
:http://biz.LGservice.com E-mail:http://www.LGEservice.com/techsup.html COLOR MONITOR SERVICE MANUAL CHASSIS NO. : MODEL: L1718S (L1718S-SNQ/L1718S-BNQ.Axx*EP) xx* means sales region and Module (xxK : INNOLUX, xxB : CPT) CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS - LG L1718S-BN | Service Manual - Page 2
DISASSEMBLY 8 BLOCK DIAGRAM 10 DISCRIPTION OF BLOCK DIAGRAM 11 ADJUSTMENT 13 SERVICE OSD 14 TROUBLESHOOTING GUIDE 15 WIRING DIAGRAM 22 EXPLODED VIEW 23 REPLACEMENT PARTS LIST 24 SCHEMATIC DIAGRAM 32 SPECIFICATIONS 1. LCD : 56 ~ 75Hz 4. Max. Resolution D-sub Analog : 1280 x 1024@75Hz - LG L1718S-BN | Service Manual - Page 3
are some special components used in LCD monitor that are important for safety. 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 hazard during service operation. Good Earth Ground such as WATER PIPE, CONDUIT - LG L1718S-BN | Service Manual - Page 4
with high voltage. 4. Do not spray chemicals on or near this receiver or any of its assemblies. 5. Unless specified otherwise in this service manual, clean electrical contacts only by applying the following mixture to the contacts with a pipe cleaner, cottontipped stick or comparable non-abrasive - LG L1718S-BN | Service Manual - Page 5
General Soldering Guidelines 1. Use a grounded-tip, low-wattage soldering iron and appropriate tip size and shape that will maintain tip temperature within the range or 500gF to 600gF. 2. Use an appropriate gauge of RMA resin-core solder composed of 60 parts tin/40 parts lead. 3. Keep the soldering - LG L1718S-BN | Service Manual - Page 6
Circuit Board Foil Repair Excessive heat applied to the copper foil of any printed circuit board will weaken the adhesive that bonds the foil to the circuit board causing the foil to separate from or "lift-off" the board. The following guidelines and procedures should be followed whenever this - LG L1718S-BN | Service Manual - Page 7
TIMING CHART VIDEO SYNC D C M A E B distingis Polo hment rity H(Pixels) + 1 V(Lines) - H(Pixels) - 2 V(Lines) + H(Pixels) - 3 V(Lines) - H(Pixels) - 4 V(Lines) - H(Pixels) + 5 V(Lines) + H(Pixels) + 6 V(Lines) + 7 H(Pixels) +/V(Lines) +/- H(Pixels) - 8 V(Lines) - - LG L1718S-BN | Service Manual - Page 8
DISASSEMBLY 8 - LG L1718S-BN | Service Manual - Page 9
9 - LG L1718S-BN | Service Manual - Page 10
BLOCK DIAGRAM InnoLux TFT-LCD Module with 4FFCLs Inverter + DC12V to DC5V AC Socket LVDS Transmitter 128KB Flash ROM TSUM16AL-LF MCU ADC 3.3V and 1.8V regulator 24C02 D-sub DDC EEPROM 24C04 OSD parameter Timing parameter AC Input Analog RGB Signal Key pad 10 - LG L1718S-BN | Service Manual - Page 11
gets the video signal converted analog to digital, interpolates input to 1280 X 1024 resolution signal and outputs 8-bit R, G, B signal to transmitter. 2. Power Part 5V in Power board. 12V is provided for inverter, 12V is provided for LCD panel and 5V for micom. Also, 5V is converted 3.3V and 1.8V - LG L1718S-BN | Service Manual - Page 12
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 achive the dc output stablize, and also the over power protection is also monitor by this part. 5. Photo-Coupler isolation. This part function is to - LG L1718S-BN | Service Manual - Page 13
.0 User Manual Operating System: MS Windows 98, 2000, XP Port Setup: Windows 98 => Don't need setup Windows 2000, XP => Need to Port Setup. This program is available to LCD Monitor only. 2. EDID Read & Write 1) Run WinEDID.exe 1. Port Setup a) Copy "UserPort.sys" file to "c:\WINNT\system32\drivers - LG L1718S-BN | Service Manual - Page 14
.(Analog Only) h) R/G/B-Gain : Allows you to set the R/G/B-Gain value manually.(Analog Only) i) MODULE : Show Current module Type j)RS232: Enable/Disable Debug Mode(on/off) Insert to Parallel Port on PC ISP Board D-SUB 15PIN Parallel Port LCD Monitor DSub Figure 1.Cable Connection For ISP 14 - LG L1718S-BN | Service Manual - Page 15
TROUBLESHOOTING GUIDE 1. No Power & Power LED Off No power Check primary rectifier voltage Check circuit if short Check IC802, C805, T801 Check pin3 of IC802 voltage about - LG L1718S-BN | Service Manual - Page 16
No raster? Yes LED Green? Yes Backlight can't be turned on. Yes Is there 5Vdc voltage on pin2 of IC501? Yes Is there high-level voltage on pin10 of IC501? Yes Are connected rightly CN501, CN502, CN503 and CN504? Yes 2. Backlight can't be turned on No Check power supply No Is Ok R526? No No Yes - LG L1718S-BN | Service Manual - Page 17
6V Check Vpin1-2 of IC801 about 1V Check R809, R814 Check ZD801, ZD802, ZD803, D803, D805 Check R809, R814, IC801, R818 Check C815, D806, R812 17 - LG L1718S-BN | Service Manual - Page 18
4.Output power is unstable Unstable power Check sampling Circuit Check the R pin voltage of IC803 about 2.5V Check R810, R811, R818 Check the C pin voltage of IC803 if 3V Change R810, R811, Change IC803 Check pin1 of IC802 voltage is 5.8V Check R809, R808, R814, D809 Check D806, C815 if short - LG L1718S-BN | Service Manual - Page 19
backlight turn on Black Screen Check power supply: NG Pin1, 2 of CN101 OK NG Check pin34, 51, 66, and 82 Of U105 OK NG Check pin32, 49, 56, and - LG L1718S-BN | Service Manual - Page 20
6.White Screen White Screen LVDS Cable Reinsert NG Change LVDS Cable NG Check VLCD OK Is 5V? NG Check Panel-Enable Of U105 (pin48) is High? OK Workmanship OK LVDS Cable NG Check LVDS Signals NG OK Panel Fail Check the HW Reset Of U105 pin84 NG Check C144 R172 Check R168, R105 Q103, - LG L1718S-BN | Service Manual - Page 21
7. BAD SCREEN Bad Screen OK LVDS Cable Reinsert NG OK Change LVDS Cable NG Check Crystal:Pin96,97 OK Of U105 OK Check the communication NG Of U105 and U106 OK Check the pins of U105 and U106 21 Workmanship LVDS Cable NG Check :X101, C153,C154 Check: SDO,SCZ, SCK,SDI, Reset - LG L1718S-BN | Service Manual - Page 22
WIRING DIAGRAM 22 - LG L1718S-BN | Service Manual - Page 23
23 - LG L1718S-BN | Service Manual - Page 24
LGE Part No. INL Part No. Description 10 MCK30281901 501010205300R BEZEL,FRONT, LE1730 MCK30284501 501010205310R BEZEL,FRONT(Silver), LE1730 20 EBU30459201 631102071430R LCD PANEL 17 ROHS 140 EBU30459301 453010100210R CABLE,D-SUB,15P MALE 1850MM BLACK/BLUE,R CPT Ref.No. INL Part No. - LG L1718S-BN | Service Manual - Page 25
IF BOARD ITEM P/N Description 790621300600R PCBA,IF BOARD, LE1730-6E0 10 790621320600R PCBA,IF BOARD,OTHRS,LE1730-6E0 20 790621340600R PCBA,IF BOARD,SMD, LE1730-6E0 30 629030006500R PROGRAM, LE1730-6E0 40 511130002202R SOLDER PASTE,Sn95.5%Ag3.9%Cu0.6% 40 511130002201R SOLDER PASTE,Sn96.5%Ag3 - LG L1718S-BN | Service Manual - Page 26
RES SMD (0603) 0Ǯ J,RT RoHS 4 150 414916010050R RES SMD (0603) 10Ǯ J,RT RoHS 2 160 414916010150R RES SMD (0603) 100Ǯ J,RT RoHS REV:A 17 170 414916010250R RES SMD (0603) 1KǮ J,RT RoHS REV:A 5 180 414916010350R RES SMD (0603) 10KǮ J,RT RoHS 4 190 414916010450R RES SMD (0603) 100K - LG L1718S-BN | Service Manual - Page 27
360 444099030030R CON, SMD 1.0mm 30PIN RoHS AL2309-A0G1Z 1 370 506140005700R LABEL,BARCODE,BLANK,33x7mm, ROHS,FOR PCB 1 380 490621300100R PCB,INTERFACE, LE1730-XE0 1 390 414916022150R RES SMD (0603) 220Ǯ J,RT RoHS REV:A 1 400 414916560910R RES SMD (0603) 56Ǯ F,RT RoHS REV:A 3 410 - LG L1718S-BN | Service Manual - Page 28
10A ITO22 OAB(MOSPE SCHTKY SRF1045CM 45V/10A ITO22 OAB(MOSPE SCHTKY SRF5-04CT-LF ITO-220AB (FEC) RoHS DIO URF1020 200V/10A ITO220(MO SPEC)RoHS DIO UFF80-015CT-LF 150V/8A, ITO-220AC(FR HEATSINK,56x20xt10mm LE1904/05 SCREW,P,CROSS,T.T-3*6,Zn ITEM P/N 790621440600R 10 410500045130R 10 410500045140R 10 - LG L1718S-BN | Service Manual - Page 29
310 419342253670R C SMD(0805) Y5V 2.2uF/25V Z RoHS 2 320 419311040060R C SMD(0603) X7R 0.1uF/50V K RoHS 1 330 419316830060R C SMD (0603) X7R 0.068uF 50V,K RoHS 1 340 419316810070R C SMD(0805) X7R 680PF/50V K,RoHS 2 350 419304710560R C SMD(0603) NPO 470PF/50V,J,RoHS 1 360 419311020060R C - LG L1718S-BN | Service Manual - Page 30
JMPR ROLL/KG D=0.6mm,AT,RoHS 12.5MM 140 430405000000R JMPR ROLL/KG D=0.6mm,AT,RoHS 15MM 150 430405000000R JMPR ROLL/KG D=0.6mm,AT,RoHS 17.5MM 160 700000000100R ASSY,PCB&RIVENT,LE1730 170 415020330540R RES CF 1/4W 33Ǯ J,AT MINI RoHS 180 414020689540R RES FSM 1/4W 6.8Ǯ J AT MINI,RoHS ITEM - LG L1718S-BN | Service Manual - Page 31
LED BOARD ITEM P/N Description 790620500000R PCBA,LED BOARD, LE1730 10 411070064450R LED O/GÓ3x5mm 4209UYOSYGW/S530-A3/S195/ 10 411070061450R LED O/GÓ3x5mm L-115WSEKCGKW-8.25LSF5.5/ 20 430631030030R WFR 2.0mm 3P 180° ,RoHS 30 490620500000R PCB,LED BOARD, LE1730 40 511130001200R SOLDER BAR, - LG L1718S-BN | Service Manual - Page 32
_POWER LED_AMBER_2 LED_GREEN_2 C164 100P J C163 100P J C162 100P J C161 100P J C158 100P J C159 100P J C160 100P J 1 1 2 2 3 4 3 4 5 5 4500-05 CN106 17 2. Input CN103 DZ11AA1-HW6 16 11 1R 6 12 2G 7 13 3B 8 14 4 9 15 5 10 FB107 FB108 FB109 BEAD60OHM BEAD60OHM BEAD60OHM - LG L1718S-BN | Service Manual - Page 33
VDDP AVDD_PLL 16 AVDD_MPLL 98 8 14 24 AVDD_ADC AVDD_ADC AVDD_ADC GNDB BIN GNDG 17 18 19 GIN 20 SOG GNDR RIN HSY NC 21 22 23 27 RXO3RXO3+ RXE0- 8 9 10 11 RXE0+ 12 13 RXE1RXE1+ 14 15 16 RXE2RXE2+ RXECRXEC+ 17 18 19 20 RXE3RXE3+ 21 22 23 0 24 25 0 26 27 28 29 30 R157 1K - LG L1718S-BN | Service Manual - Page 34
6. Inverter +12V VCC5V R521 33R 1/4W BRIGHTNESS R523 33K 1% +5V C507 2.2u/25V R528 NC R524 22K 1% C504 1n/50V R512 10K C511 2.2u/25V ON/OFF R526 10K +5V D505 OLP1 R514 100K D506 1N4148W OLP2 BAW56W R513 1M C512 33n/50V R531 NC ZD501 NC R507 NC Q501 NC +5V IC501 1 DRV1 2 VDDA 3 - LG L1718S-BN | Service Manual - Page 35
P/NO : L1718S Mar. 2006 Printed in Korea
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COLOR MONITOR
SERVICE MANUAL
Website:http://biz.LGservice.com
CAUTION
BEFORE SERVICING THE UNIT,
READ THE
SAFETY PRECAUTIONS
IN THIS MANUAL.
CHASSIS NO. :
MODEL:
L1718S
(L1718S-SNQ/L1718S-BNQ.Axx*EP)
*To apply the
MSTAR Chip
.
xx* means sales region and Module (xxK : INNOLUX, xxB : CPT)