LG -- L1718S -- Service Manual
Contents
1. VCC3 3 VDDP amp LVA2P 19 SH o e LVACKM EE REC 20 Ox LA 58 20 vecsv 9 5 55 RXE3 FB106 gu 2 a 94 1 2 22 BEAD60OHM Ci44 10uF 25V 84 2000009900 AA 5 6 Ep WAP RSTZ222222222 z 2 599658 a 6666666666 gt gt X nzzzae 25 26 R171 9 pen 8 8 5 uuo a R172 10K 8 5 a 8 5 x 3 14 318 2 2 H VCC3 3 PE eb TT 8 8 9 U108 24C04 8 7 vec wP 1 MCL R178 100 WE 12C MDA R179 1001 51 Sek CN101 8 MENU 8 DOWN UP 6 SELECT AUTG 6 POWER 45 GND 214 AMBER 2 3 GREEN 1 4 4 4 4 4 SW101 SW102 SW103 SW104 SW105 TO I F BD CN105 D o o SW TACT SWTACT Swmcr SW TACT SW TACT 4 1 2 213 3 CN102 4500 03 5 LED CN103 4500 03 180 degree pitch 2 LED101 33 6 Inverter 7 Power n 3M3kv t S cso Bonzo u E p ou 1 n m i 21 3 1501 OR 4 D2. MINI RoHS 100 4148703055408 RES MG 1 2Ws J AT RoHS 430405000000R MPR ROLL KG D 0 6mm AT ROHS 7 5MM EE 130 4304050000008 MPR ROLL KG D 0 6mm AT ROHS 10MM MPR RO 208 MPR RO L KG D 0 6mm AT RoHS 12 5MM 140 430405000000R L KG D 0 6mm AT ROHS 15MM 208 pue R820 R821 R506 R508 R532 R533 R501 R503 502 507 510 516 J 804 1805 809 12 503 808 505 514 801 803 J 508 513 515 810 501 512 802 511 506 J 509 R521 R812 ITEM P N Description 790621460600 PCBA PWRGINV B AI R LE1730 6E0 los x 10 418147038530 CAP CD NPO 47pF 1KV J VT RoHS t 20 4182102270308 CD X7R 1000pF 500V K VT RoHS 20 30 419111040030R 420264700230R SH 47uF 25V M 125 C VT 6 3x11 RoHS C813 C802 C811 C817 C822 1 2 4 0 50 410072013150R XSTR UTC2SC1815L GR NPN TO92 UTC RoHS 410072013370R 2SC1815 GR T2SPF T VT TOSHIBA Ro P 410072013210R XSTR 2PC1815GR IVT PHILIPS RoHS REV 1 60 J412022002300R AP431VL TO 92 1 VT RoHS 412022002830R 412022002840R IC TL431ACLPG TO 92 196 VT ON RoHS 416231041530R MEB 0 luF 100V RSB VT RSBEC3100D t 420424710260R SD 470uF 25V 105 C ST 10x16 RoHS t 90 J420421510330R SD 150uF 35V M 105 C VT 8x12 RoHS ITEM P N Description 50 50 60 AS431 TO 92 VT A1SEMI RoHS 60 70 412022002240R
3. VCC3 3 vapc VADC VMPLL VPLL VDDP FB102 2 BEAD6OOHM 9 eX 8 s SES sas 3 3 4 oooo 8 888 65646 8888 92 R157 1K lt lt lt zi 6666 6 st K Key_AUTO BINON ooo 21 a gt GPIO_P06 99 RISO K Key_DOWN T 8 5 GPIO 2 5 ag ue Key POWER GNN 2228 amp GPIO POV SAR2 ax RAN Key UP GPIO POU SAR1 H87 Key MENU VCC1 8 SOGIN0 RSTN 9 RINON RINOP 43 b 4 HSYNCO GPIO P23 a a a VSYNCO o 3 DDCA_SDA RS232_TX GPIO 10120 Hi4 3333 SCL rs232 GPIO P11 I2C NDA 4 s 4 5 5 GPIO_P15 PWMO GPlo P13 4 mA AA LED_GREEN NC GPIO P14 Fee LED_AMBER NC PWM1 GPIO_P25 Fae m Dimmer NC GPIO P12 Fag E CCFL_ENABLE NC GPIO P27 PWMI 4 PANEL_ENABLE Nc LVBOM 38 NG LV80P 27 oo VMPMPLL NC LVB1M 573 12 PWMO GPIO 526 LVBIP 77 4 GPIO_P16 PWM2 LVB2M muss 25 La E 105 140 REFM 70 RXoc 7 BEAD60OHM 1u 16V 0105 RXDC 8 CN104 U106 281 ees w La RXO3 99 AF230N A2G1T P TWO 8 SST25VFO10A TSUMIGAL Ter 10 3 2 37 65 RXEO 7 35 spo mer 12 HOLD T SCZ LVAOP 13 WPR SCK SCK 1 ped vss sp 5 1 spi LVA1M 55 LVAIP 16 LL 7 Rit 3201 15 r E1
4. z z z 1 100 414916000050R RES SMD 0603 0Q J RT RoHS 22 5104511 414908051450R R803 R 807 R 824 414908330110R R818 R502 R504 R517 R5 20 R816 R811 0805 510KQ J RT RoHS 0805 33KO F RT RoHS REV A 3 5 FIASUBDSERSOR RES SWD TOROS RTRs oo 0 RES SMO 0905 4 rATRUS 150 4149088201106 RES SMD 0805 8 2 F RT RoHS 170 R817 R802 R806 R829 1206 100 J RT RoHS 0805 2000 J RT RoHS 0805 5 1 F RT RoHS r JR810 0603 39 F RT RoHS R522 1 1 1 2 10 FI4808020150R_ RES SHO I 1 522 _ 0805 100 F RT RoHS 1 1 2 1 3 1 1 180 414908510110R RESS 190 414916390210R RES SM 200 414908100310R RES SM CO O 210 4149160104508 RES SMD 0603 100KQ RT REV A RoHS 1 R5 220 4149163304106 RES SM R527 240 R512 R526 240 414916010350R RESS 180 190 200 210 0603 3 3M F RT RoHS 250 4149166043108 RESS 0603 604 F RT RoHS 260 270 290 300 0603 10KQ J RT RoHS R538 R513 R529 R530 z 414916330210R RESS 0603 33 F RT RoHS 414916220210R RESS 0603 22KQ F RT RoHS 300 4149082202108 RES S R524 0805 22KQ F RT ROHS 2 515 516 28 m zoo aore PATRONS REVA p m EM c D 310 419342253670R C SMD 0805 Y5V 2 2uF 25V Z RoHS 22 1 507 511 320 419311040060R C SMD 0603 X7R
5. KA431AZ 196 VT FAIRCHILD RoHS P 0 1 1 1 C509 C522 Usage 700000000100R JASSY PCB amp RIVENT LE 1730 10 J490621400100R PCB PWR amp INV B LE1730 XEO 20 512006000500 3 0 1 6x3 0mm 30 512006000600R 4 1 2 2x3 0mm KEYPAD 908215000008 PCBA KEYPAD BOARD LETT3 HRN ASS Y 130mm UL10074228 RoHS WER 8 1 5mm S8B ZR RoHS JST SW 160gf 1P H 4 3mm DIP 2420 Usage 1 1 1 0 48254 40 490621500100 PAD LE1730 6 7 3 4 5 6 7 8 1 2 Location CN102 CN101 SW101 SW102 SW103 S W104 SW105 0 0345 1 53295 50 511130001200R SOLDER BAR Sn96 5 Ag3 0 Cu0 5 Ni0 06 Ge0 60 511130000300R SOLDER WIRE Sn96 5 Ag3 0 Cu0 5 Ni0 06 Ge 70 51 11400007018 FLUX Grade 0 812 0 010 30 LED BOARD 790620500000R PCBA LED BOARD LE1730 Ho 4 10700644508 LED O G 3x5mm 4209UYOSYGW S530 A3 S195 IR LED O G 3x5mm L 115WSEKCGKW 8 25LSF5 5 LED101 WFR 2 0mm 3 180 RoHS 30 956205000008 PCB LED BOARD LE1730 1130001200R SOLDER BAR Sn96 5 Ag3 0 Cu0 5 Ni0 06 GeO 511130000300R SOLDER WIRE Sn96 5 Ag3 0 Cu0 5 Ni0 06 Ge 60 51 11400007018 FLUX Grade 0 812 0 010 2 103 31 1 DC to DC SCHEMATIC DIAGRAM vccsv u10 VCC3 3 VCC3 3 e LD11
6. nt 6 a BAV70 SOT owe afori Pew n dg 3 PA aw alus ME T E 5 12 39k 1 R519 C530 R515 FN ME M ode p EN 1 i over ENA 33n 50V m Suc no FS 1 r L 7591561 e sss EE uzeo E 1222 V m Loss 1 505 22 50 Em o ovee m om A ET Bivrosor oven t amo eus cowl 19 ES m cso mo nm 2008 1 2 10K 1 34 Mar 2006 L1718S Printed Korea
7. 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 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 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 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 12 ADJUSTMENT Windows EDID V1 0 User Manual 2 EDID Read amp Write 1 Run WinEDID exe Operating System MS Windows 98 2000 XP Port Setup Windows 98 gt Don t need setup Windows 2000 XP gt Need to Port Setup This program is available to LCD Monitor only 1 Port Setup a Copy UserPort sys file to c WINNT system32 drivers folder b Run Userport exe 2 Edit Week of Manufacture Year of Manufacture Serial Number a Input User Info Data b Click Update button C Click Write button
8. N CAUTION Please use only a plastic screwdriver to protect yourself from shock hazard during service operation N WARNING BE CAREFUL ELECTRIC SHOCK f you want to replace with the new backlight CCFL or inverter circuit must disconnect the AC adapter because high voltage appears at inverter circuit about 650Vrms Handle with care wires or connectors of the inverter circuit If the wires are pressed cause short and may burn or take fire Be careful while tilting and rotating the monitor to avoid pinching hand s PELLEN V A Leakage Current Hot Check Circuit AC Volt meter Good Earth Ground such as WATER PIPE CONDUIT etc Instrument s exposed METALLIC PARTS Ls 1 5 Kohm 10W SERVICING PRECAUTIONS CAUTION Before servicing receivers covered by this service manual and its supplements and addenda read and follow the SAFETY PRECAUTIONS on page 3 of this publication NOTE If unforeseen circumstances create conflict between the following servicing precautions and any of the safety precautions on page 3 of this publication always follow the safety precautions Remember Safety First General Servicing Precautions 1 Always unplug the receiver AC power cord from the AC power source before a Removing or reinstalling any component circuit board module or any other receiver assembly b Disconnecting or reconnecting any receiver electrical plug or other
9. Backlight Unit Top Bottom edge side 4 CCFL Powerswor less than IW Cold Cathode Fluorescent Lamp 2 OPTICAL CHARACTERISTICS 2 1 Viewing Angle by Contrast Ratio gt 10 a For InnoLux MT170ENO1 V 7 panel Left 75 85 Right75 85 Top 75 85 Bottom60 70 6 ENVIRONMENT at type CR210 CR25 b For CLAA170EA07QG panel Left 6 1 Operating Temperature 10 C 35 C 50 F 95 F 70 85 Right70 85 Top 63 85 Bottom67 85 Ambient at type CR210 CR25 6 2 Relative Humidity 10 80 2 2 Luminance Non condensing a For Innolux MT170ENO1 V 7 panej 300cd m Typ 6 3 MTBF 50 000 HRS with 9096 Confidence 250cd m Min 6500k 200 cd m Mip 9300k Lamp Life 50 000 Hours Min b For CLAA1 70EA07QG panel 290cd m 2 3 Contrast Ratio a For InnoLux MT170EN01 V 7 panel 500 1 minimum 700 1 Typical Width 308 4 mm b For CLAA170EA07QG panel 400 1 minimum 500 1 Length 376 7 mm Height 126 1 mm Typical 3 SIGNAL Refer to the Timing Chart 3 1 Sync Signal Type 8 WEIGHT with TILT SWIVEL Separate Sync Composite SOG Sync On Green Net Weight 374103kg 3 2 Video Input Signal Gross Weight 4 8 0 4 kg 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 Color 15 0 0 714 Vp p 3 Input Impedance 75 Q 3 3 Operating Frequency Horizontal 30 83kHz Vertical 56 75Hz 4 Max Resol
10. POWER INTEGR lC802 300 511110000101R HOT MELT ADHESIVES 4526 4 37115 507200003700R HEATSINK 46x20xt10mm LE1704 05 27 sr pouuswsw poewrscxss rum S pee sn la ASST NS UFFEDOWSCTNFFEDODSCTIEIDU HONO SCWTRY SRFIOROCN WIOTOZORNWONEt D E SCWTKY SRFIORCH BWRDATTODDOREWOSE D 20 onoo DIO URFTOSODOWINGATOZIWWO PES wawawa 50 INS 5 o LLALL ALLT SLLACLLSA NAU CW e L 7 KSTRWWSTSSWRPNSOTINNEWEONRES b 7 STRWWBTSSWLTICNPRZBUNA 20750730 D 10 410500045210R XSTR PMBT3904 NPN 200MA 40V SOT23 PHILIP 1 Q801 20 1009569208 eNeWsevWWS TIER ODESUE RS PT 20 EWERSGYOSWDDIUEBFSODIOMDIDES D I 30 411100975920R 7 5V 5 25236 SOD123 PE C RoHS 30 411131575952R ZENER 7 5V 0 5W DDZ7V5C F SOD123 DIODES s Iss TeweRISVWTZSUSSGSODIDUWWCHOS p 40 Qnm EWERISYOSWDDZISTSODYDIDIODESWO P 50 SEM LC 414904100010R RES SMD 1206 1000 F RT RoHS 1 R809 60 414908010350R RES SMD 0805 10KO J RT RoHS REV A 3 R808 R819 R 827 3 70 4149080245508 RES SMD 0805 24MO J RT RoHS R801 R805 R822 R823 80 414908010250R RES SMD 0805 1 J RT RoHS REV A B R813R814R815 90 4149080474508 RES SMD 0805 470 J RT ROHS r 8825
11. c Remove all default number d Add 300 3FF e Click Start button f Click Exit button 13 SERVICE OSD 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 Auto Color W B balance and Automatically sets the gain and offset value INIT EEPROM initialize 24C04 CLEAR ETI To initialize using time AGING Select Aging mode on off R G B 9300K Allows you to set the R G B 9300K value manually 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 LCD Monitor D ISP Board Sub Figure 1 Cable Connection For ISP TROUBLESHOOTING GUIDE 1 No Power amp Power LED Off Check primary rectifier voltage Check pin3 of IC802 vd Check R801 R805 R822 R823 R817 about 1V i Check pin2 of IC802 Check R803 R807 voltage about 2V R824 R825 Check R812 R816 Check pin1 of IC802 cate 15 2 Backlight can t be turned Yes Yes Backlight can t be turned on Yes No Is there 5Vdc voltage on Check power supply pin2 of IC501 Yes Is there high level No Yes voltage on pin10 501 Check I F board No Yes R526 open No Connecting th
12. 200MA 40V SOT23 ON MMBT3904 NPN SOT 23 INFIN EON RoHS 0103 0106 4 2 410500046130R XSTR MMBT3906 PNP SOT 23 INFIN EON ROHS 20 4105000462108 XSTR PMBT3906 PNP 200MA 40V SOT23 PHILIP Q102 0105 0 0 0 2 0 0 0 0 0 2 30 410500044270R XSTR AO3401L P CH ALPHA OMEGA SOT23 RoH 0 40 JF10500050130R KSTRSWITWINR CHSOTISINFWEOMIRGHS p 40 8105000592100 KSTRINTINCHFETSOTISUHUPSWoS l 50 02250 DIO BAVO LF TOV SOT 23 l 50 IUIUS PIO BAVGE SOT ZSINFINEOWRGRS 0 4 50 411020026210R DIO BAV99 350mW 70V SOT 23 PHI RoHS Q107 TVS101 TVS102 TVS103 TVS104 60 4110200470208 DIO BAV70 LF 70V SOT23 FEC RoHS 0 60 4110200472108 DIO BAV70 85V SOT23 PHILIPS RoHS 1 D103 70 411101156950 ZENER BZV55 C5V6 SOD80C PHILIP S RoHS 0 25 ad 11100656951R ZENER 5 6V ZMM5232B LF DO213AA FRONTIER 5 0 4111503569508 ZENER 5 6V MTZS05 5 6 G SOD 12 3 MMC RoH 0 70 4 80 412000479990R C CAT24C04WI TE13 SOIC 8ICATALYST RoHS 412000279280 IC M24C04 WMN6TP4K SOP8 ST RoHS 412000279480R IC AT24C04N 10SU 2 7 SOP8 TMEL RoHS 412000330020R IC LD1117AL 1 8V A SOT223 UTC RoHS 412000330830R IC AS1117L 1 8 TR LF SOT223 A1 SEMI RoHS 100 412000372020R LD1117AL 3 3V A SOT 223 UTC RoHS 100 412000372830R AS1117L 3 3TR LF SOT223 A1S EMI RoHS 412000480280R M24C02 RMN6TP SO8 ST ROHS 412000435480R AT24C02BN 10SU 1 8 SOIC8 2K ATMEL R O 1 1 1 1 10
13. 0 1uF 50V K RoHS t 330 419316830060R 5 0603 X7R 0 068uF 50V K RoHS t 1 1 0805 X7R 680PF 50V K RoHS 2 1 1 340 4193168100708 5 350 4193047105608 5 0603 NPO 470PF 50V J RoHS am 4 501 502 513 514 411020026390R DIO BAV99 SOT 23 INFINEON ROHS P gt D gssuoaosm s 5m 6939200608 s p pner 390 4193110300608 SMD 0603 X7R 0 01uF 50V K RoHS 400 4110200460908 D 1N4148W 75V 0 15A P E C RoHS SOD 123 400 4110230040218 O SN4148 LF 75V 0 15A SMD 1206 FEC Ro c 0603 X7R 4700PF 50V RoHS 0603 X7R 1000PF 50V K RoHS 1 0603 X7R 2200PF 50V K RoHS 4 x c 411020047210R DIO BAV70 85V SOT23 PHILIPS RoHS 410 411020026020R O BAV99 LF 350mW 70V SOT 23 FEC RoHS P 410 4110200262108 DIO BAV99 350mW 70V SOT 23 PHI RoHS 2 501 0502 420 411020047020R DIO BAV70 LF 70V SOT23 FEC RoHS P 420 2 C510 C821 C504 C506 D503 D504 411020068090R DIO BAW56 75V SOT 23 PANJ IT RoHS P 411020068020R DIO BAW56 70V SOT 23 FRONTIER RoHS 412000455630R C 0Z9938GN SOIC16 02 MICRO ROHS D505 5 430 411020068210R DIO BAW56 85V SOT 23 PHILIPS ROHS 1 po 1 501 450 419313330060R SMD 0603 X7R 0 033uF 50V K ROHS 22 5166512 Russ RES NUS RES smo FATRORS 5512
14. 0 47uF 275V K X2 F15 RoHS su 40 416202224610R MEY 2200pF 400V M Y F10mm RoHS 1 C820 50 416202224610R MEY 2200pF 400V M Y F10mm RoHS 2 C801 C 806 60 420421020102R CAP 1000uF 10V M 105 C N F 10x16 L ES 22 812 809 70 420421020211R CAP SD 1000uF 25V M 105 C F 13x20 RoHS 808 80 J420431014582R CAP SEK 100uF 450V M 105 C CF 18x35 RoHS 85 90 416204724610R CAP MEY 4700pF 400V M 10 RoHS 10 C824 100 425000010530R CHK 5uH 7 8X10 CHK 053 0 181085R L 2 L802 L803 110 426000050070R CHOKE L FILTER 12mH LIN 007 ET 20 RoHS L801 1 120 426000090470R XFMR 750u 1 4 8 3 113 5 047 DIP 1 n 1 1 130 4320094007018 50 4A 109 P 5mm RoHS 1 RT801 140 4306131252108 5 SLOW 2 5A 250V U C V AT 3 6x10 RoHS 1 rot 150 4401490002208 5 AC 10A 250V U C V G Y 45mm TU 301 SP 1 Ps 1 160 430300600120R HRN ASS Y 6P 110mm UL1007 24 ROHS 418247233020R CD X7R 4700pF 1KV K W O FO RMING RoH 180 1 j mm WER 2P P 23 5mm 90 4100 D02 RoHS 504 230 4100500623308 XSTR AF4971NN N CH PDIP8 ANACH IP RoHS P 220 5100004098 JRssrmsurreewscrurewromcrurUS p 250 poon ssri RON T T L 260 wr pomeo G 511140000701R FLUX Grade 0 812 0 010 3 7315 735100005100R 55 5 TOP245Y LE1704 05 ROHS 10 4120003422708 IC TOP245YN TO 220 7C RoHS
15. 05 600 800mA GBK201209T 26 Ww wj w R186 R 187 R130 R129 R114 R117 R1 20 R124 R125 R127 R131 R132 R 101 R 162 R 163 R 167 R 168 R 178 R 179 R157 R158 R159 R160 R1 61 R106 R172 R180 R181 R102 R105 R136 R137 R121 R108 R110 R122 R149 R1 50 R154 R155 R173 R174 R166 R 182 R 183 R 184 R 185 R 109 R169 R133 R 134 R 135 RP102 C158 C159 C160 C161 C1 62 163 164 153 154 126 125 103 104 106 107 1 09 129 156 131 132 C134 C135 C136 C137 C 139 C141 C143 C147 C 14 8 C149 C150 C151 C 152 C166 C140 112 113 114 115 1 16 117 118 101 FB102 FB103 FB105 FB1 06 360 444099030030R CON SMD 1 0mm RoHS AL2309 A0G1Z CN104 370 506140005700R LABEL BARCODE BLANK 33x7mm ROHS FOR PCB 380 490621300100R PCB INTERFACE LE1730 XEO 390 4149160221508 RES SMD 0603 2200 J RT RoHS REV A R107 100 4149165609108 RES SMD 0603 56Q F RT RoHS REV A R113 R116 R119 410 4320023601408 BEAD CORE SMD 0603 60Q 600mA GBK160808 FB107 FB108 FB109 7906214006008 PCBA PWR amp INV B LE1730 6E0 7 10 412140001390R EL817M B EVERLIGHT RoHS 0 10 412140002380R IC LTV817M PR VDE LITE ON P 10mm RoHS 1 IC801 20 411050006041R DIO BRDG KBL06M 600V 4A MOSPEC RoHS P 20 4110500070108 DIO BRDG KBL405G 600V 4A TSC RoHS 20 411050005020R DIO BRDG BL4 06 BF52 LF 600V 4A FRONTIER D8OL 30 J416194743011R MEX
16. 10 10 2 5 5 mm 20101 20105 20106 201 07 20108 0108 0102 0101 0103 0105 0106 R190 R170 R171 R103 0 0 1 0 1 0 1 CAT24C02WI TE13 SOIC 8ICATALYST RoHS 0 1 1 0 1 4 2 40 414916000050R RES SMD 0603 00 J RT RoHS 50 414916010050R RES SMD 0603 100 J RT RoHS 160 414916010150 RES SMD 0603 1000 J RT RoHS REV A 17 3 70 414916010250R RES SMD 0603 J RT RoHS REV A 5 1 5 a m e z N N 10 414916022250R RESS 0603 2 2 RoHS 20 414916047150 RES S 0603 470Q J RT RoHS REV A 414916047250R RES S n 8 Ww e oj O O o 1 0603 4 7KQ J RT RoHS 15 40 414916390010R RES SMD 0603 3900 F RT RoHS 50 414916750910R RES SMD 0603 750 F RT RoHS REV A 60 415751035080R RP 0612 10KQ x4 1 16W J 8P4R RoHS 4 70 19301010560R SMD 0603 NPO 100PF 50V J RoHS 80 419302200560R C SMD 0603 NPO 22PF 50V J RoHS 2 90 419302210560R SMD 0603 NPO 220PF 50V J RoHS 1 00 419303300560R SMD 0603 NPO 33PF 50V J RoHS 10 419311040060R SMD 0603 X7R 0 1uF 50V K RoHS N N N ej w N N 1 23 199 8 20 419311054070R SMD 0805 X7R 1uF 16V K RoHS REV A 30 419314730060R SMD 0603 X7R 0 047uF 50V K RoHS 4 1 7 40 32002312111R BEAD CORE SMD 0805 120Q 300mA RoHS 1 4 50 432002360012R BEAD CORE SMD 08
17. 17AL 3 3V T 3 vw vout T _ Jvcc33 34 3 3 8 2 3 8 3 8 T s W ON OFR110 8 o CCFL_ENABLE 0102 VCC1 8 LD1117AL 1 8V T 3 vw vout 2 4 vec1 8 4 E a E gt E e 8 s ct 5 g 4 ex VCC3 3 vecsv VLCD al 0101 AP2305GN x 515 T T MLCD 4 a LED GREEN 9 9 PMBT3906 3 z LED AMBER 400 ES E a R101 B 3 o xl 8 N a an 8 8 VCC3 3 PANEL ENABLE R10 20K s ac 2 el LED_AMBER PMBT3906 LED GREEN 2 R107 220 CN105 2x4PIN ped ey 4500 05 CN106 2 Input 8 8 LED GREEN 2 R107 A220 Key AUTO Key DOWN Key MENU Key Key POWER LED AMBER 2 GREEN 2 UP vecsv 8 1 EMI 8 273 34 1 Brightness L5 ONOFF e R190 0 Dimmar E a 104 PMBT3904 NC 16 CN103 DZ11AA1 HW6 ELI 11 1 a FB107 vv BEAD6OOHM R113 56 1 C112 47n 25V RIN 714 100 C113 47n 25V ENDE 210 2 EE 108 yv vn BEAD6OOHM 8116 56 1 C114 47n 25V GIN 6 LI rn R117 105 C115 47n 25V ENDG 3 FB109 vvv BEAD
18. 6OOHM R119 56 1 C116 47n 25V BIN 8 R120 100 C117 47n 25V GNDB PC5V_VGA lo 24 1 R121 470 C118 47n 25V SOG alo ol 51 VCC3 3 10 R122 AKT 4 DETECT gt R125 100 gt ppca_scL_I t 1 R127 100 DDCA_SCL R129 100 n FB101 gt VSYNC R130 100 IRAY 1 gt HSYNC R131 100 gt gt DDCA I 1 R132 100 DDCA SDA 19 yD i a a e 9 8 f o o o al al al 2 z z 2 2 2 8 8 xk TT a 5 8 S 8 3 3 s 8 8 RR 5 l o o 4 4444 24 44 I A VCC3 3 R 2 PC5V_VGA TVS101 Aw 5 T 1 99 3 VCC3 3 Hi Ny 103 BAV7O TVS102 9103 f ie 1 24 02 1051 ai 8 TVS103 2 0 VCC 7 gig lt DETECT 3 AU x DDCA SCL 4 SDA TVS404 GND SDA 99 32 3 Scaler TSUMI6AL
19. 75 035 1024 H Pixels V Lines H Pixels V Lines 00 9 9 00 25 31 5 0 5 40 0 37 879 25 67 0 06 0 15 40 50 20 00 40 80 40 80 800 800 832 24 68 68 870 pl E E s H Pixels pg Eca SR ES o 1024 x 768 o2 wl S t N a N 1024 x 768 1152 x 870 1152 x 900 N 1280 1024 1280 1024 DISASSEMBLY Put a soft cushion on the floor and lay the stand on its side so that the base is Put the hing cover upward and remove it accessble Hold the set while folding the lacth and 5 Unsrew the 4 srews on the hinge take out the stand base 5 2 Put the hing upward and remove it 3 1 Unsrew the 3 screws on the neck 3 2 Put the neck upward and remove it Pull up the cabinet corner and disasemble the front bezel 7 1 the front on the side of a soft cushion is Pull out the lamp wire 7 2 Tum the back cover and hold it as shown in the figure 11 Pull out the cable 12 Unsrew the 4 srews around the chassis as shown in the figure Pull out the LVDS cable BLOCK DIAGRAM Inverter DC12V to DCSV DESCRIPTION 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 digita
20. 7500502 C SRDIOSOSTXTR O22 SOV K RoHS dl 4 4 411150391950R ZENER 9 1V MTZS05 9 1 G SOD 123 MITSUBI 411131591952R ZENER 9 1V 0 5W DDZ9V1C F SOD1 23 DIODES 70 80 500 520 520 520 R509 R534 ZENER 9 1V MMSZ5239A 5 00123 C RoHS 7906214106008 PCBA PWRSINV B AI LE1730 6E0 790621450600R PCBA PWRSINV B AI A LE1730 6E0 1 jl A 20 7906214606008 PCBA PWRS amp INV B AI R LE1730 6E0 ITEM P N Description 790621450600 PCBA PWR amp INV B AI A LE1730 6E0 10 4151306805408 RES CF 1 2W 680 J AT RoHS REV A 1 R804 20 4153401015408 RES MOF 1W 1000 J AT MINI RoHS 8828 30 4110300030408 DIO FR103 200V 1A DO 41 MOSPEC RoHS oj O 1N4148 35 75V 0 15A DO35 P EC RoHS 40 411022003020R O 1N4148 LF 75V 0 15A AT FEC RoHS 40 4110220032108 0 1N4148 75V 0 2A AT PHIL RoHS 50 411032006020R O FR10 10 LF 1000V 1A AT FRO 10 20 30 411020052020R O A02 LF 200V 1A R1 FEC ROHS 40 411020048090R 40 oj 1 0806 0 NNNM p 50 J411020055330R 0 MUR1100ERL AXIAL LEAD ON RoHS 60 411020050010R 60 411020050020R O P6KE150A DO 15AT TSC RoHS O P6KE150A LF AT FRONTIER RoHS 411020050090R O P6KE150A DO 15 AT PANJ IT ROHS ZD802 70 4320022001608 EAD CORE BF30TA 3 5x9x0 8 z 8801 29 80 4150301055408 RES CF 1 2W 1MO MINI RoHS 90 4140303305408 RES FSM 1 2W 330
21. AND NECK LE1730 RefNo INPPatNo Descripton MCK30284501 501010205340R BEZELFRONT SIen LE1730 LCD PANEL 17 CLAA170EA07QG CPT 60 MFB30282101 501120103100R LENS LE1730 oo PCBA PWR amp INV IB LE1730 6E0 80 AGU30210601 502060002000R HINGEASSEMBLY LE1730 O 90 MCK30283101 501260202000R JSTANDNECK LETZ20 24 REPLACEMENT PARTS LIST CAUTION BEFORE REPLACING ANY OF THESE COMPONENTS READ CAREFULLY THE SAFETY PRECAUTIONS IN THIS MANUAL NOTE S SAFETY Mark AL ALTERNATIVE PARTS IF BOARD ITEM P N Description Usage Location 7906213006008 PCBA IF BOARD LE1730 6E0 10 7906213206008 PCBA IF BOARD OTHRS LE1730 6E0 20 7906213406008 PCBA IF BOARD SMD LE1730 6E0 30 629030006500R PROGRAM LE1730 6E0 of e e e 40 511130002202R SOLDER PASTE Sn95 5 Ag3 9 Cu0 6 40 1130022018 FOLDER PASTE STOSSRAGS RUDD O 90901320901 PCEAIFSOAROTHSITIPRHET Ed CAP EC 22uF 16V M 105 C ST 5x11 RoHS 5 130 133 142 145 1 05 40 4204322104608 CAP 220uF 16V 1059 ST 6 3 11 RoHS 1 108 50 430631060020R WAFER 2 0mm 180 RoHS 1 CN101 60 J430631080130R WAFER 2x4P 2 0mm 200P HD 2 4ST RoHS 1 CN105 1 432008010370R XTAL 14 31818MHz 16pF HC 49US 30PPM DIP 85 X101 C ROHS 4 d 70 3 80 40819015030R CON D SUB FEM 15P RA W O SCREW DZ11AA1 H 1 CN103 ES 90621340600R PCBA IF BOARD SMD LE1730 6E0 7 10 410500045140R XSTR MMBT3904LT1G NPN
22. Website http biz LGservice com G E mail http www L GEservice com techsup html COLOR MONITOR CHASSIS NO MODEL FLATRON 17185 L1718S SNQ L1718S BNQ Axx EP CAUTION BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL apply the MSTAR Chip 5 SPEGIFIGATIONS niente 2 SERVICE OSDir ume e 14 PRECAUTIONS 3 TROUBLESHOOTING GUIDE 15 TIMING CHART Ju I I 7 WIRING DIAGRAM LLL 22 8 BLOCK DIAGRAM LLL LLL 40 23 DISCRIPTION OF BLOCK DIAGRAM VEDI 11 REPLACEMENT PARTS LIST NE d 24 ADJUSTMENT e 13 SCHEMATIC DIAGRAMVM 32 SPECIFICATIONS 1 LCD CHARACTERISTICS 5 POWER SUPPLY Type TFT Color LCD Module 5 1 Power AC 90 264V 47 5 63Hz 0 8A Active Display Area 17 inch 5 2 Power Consumption Pixel Pitch 0 264 H x 0 264 V Color Depth 16 2M colors H V SYNC VIDEO P OWER CONSUMPTIO Size 358 5 H x 296 5 V x 17 5 D Electrical Interface LVDS Surface Treatment 5 less than IW ie DPMSOFE less than IW Operating Mode Normally White Transmissive mode less than TW
23. arate from or lift off the board The following guidelines and procedures should be followed whenever this condition is encountered At IC Connections To repair a defective copper pattern at IC connections use the following procedure to install a jumper wire on the copper pattern side of the circuit board Use this technique only on IC connections 1 Carefully remove the damaged copper pattern with a sharp knife Remove only as much copper as absolutely necessary 2 carefully scratch away the solder resist and acrylic coating if used from the end of the remaining copper pattern Bend a small U in one end of a small gauge jumper wire and carefully crimp it around the IC pin Solder the IC connection 4 Route the jumper wire along the path of the out away copper pattern and let it overlap the previously scraped end of the good copper pattern Solder the overlapped area and clip off any excess jumper wire o At Other Connections Use the following technigue to repair the defective copper pattern at connections other than Pins This technigue involves the installation of a jumper wire on the component side of the circuit board 1 Remove the defective copper pattern with a sharp knife Remove at least 1 4 inch of copper to ensure that a hazardous condition will not exist if the jumper wire opens 2 Trace along the copper pattern from both sides of the pattern break and locate the nearest component that is d
24. attage soldering iron and appropriate tip size and shape that will maintain tip temperature within the range or 500R to 600R 2 Use an appropriate gauge of RMA resin core solder composed of 60 parts tin 40 parts lead 3 Keep the soldering iron tip clean and well tinned 4 Thoroughly clean the surfaces to be soldered Use mall wire bristle 0 5 inch or 1 25cm brush with a metal handle Do not use freon propelled spray on cleaners 5 Use the following unsoldering technique a Allow the soldering iron tip to reach normal temperature 500F to 600R b Heat the component lead until the solder melts c Quickly draw the melted solder with an anti static suction type solder removal device or with solder braid CAUTION Work quickly to avoid overheating the circuitboard printed foil 6 Use the following soldering technique a Allow the soldering iron tip to reach a normal temperature 500 to 600Fj b First hold the soldering iron tip and solder the strand against the component lead until the solder melts Quickly move the soldering iron tip to the junction of the component lead and the printed circuit foil and hold it there only until the solder flows onto and around both the component lead and the foil CAUTION Work quickly to avoid overheating the circuit board printed foil d Closely inspect the solder area and remove any excess or splashed solder with a small wire bristle brush IC Remove Replacement Som
25. e Are connected rightly CN501 output CN502 CN503 and 504 connector Yes s there instantaneously pulse No Yes wave on pin1 pin3 pin15 of IC501 U501 U502 fail at the moment of restart No IC501 fail Yes No Is ok T501 T502 T501 T502 fail Yes Check feedback circuit END Isen Vsen D503 D504 D501 D50 16 3 DC output voltage is unstable Output Voltage Unstable Check Vbe of Check 20801 0801 below 0 3V ZD802 ZD803 D803 D805 Check Q801 Q802 Check reference Check Pin R of Check R809 voltage IC803 voltage 814 801 about 2 5V R818 Check R810 R811 Check feedback Check Vpin3 4 of Check C815 ircui D806 R812 circuit 801 about 6V Check Vpinl 2 of IC801 about 1V Check R809 R814 Unstable power Check sampling Circuit Check the R pin voltage of IC803 about 2 5V Check pin1 of IC802 voltage is 5 8V 4 Output power is unstable Check R810 R811 R818 Change R810 R811 Check the C pin voltage of IC803 if 3V Y Check 809 R808 R814 D809 Check D806 C815 if short Change D806 C815 Check pin3 of C802 voltage about 1V Change R801 R805 R822 R823 R817 5 Black Screen backlight turn Black Screen Check power supply LN oy Power Fail Pin1 2 of CN101 Check pin34 51 66 and 82 Check FB103 Of U105 And U102 Check pin32 49 56 and 75 Check FB106 Of U105 And U101 Check Reset p
26. e chassis circuit boards have slotted holes oblong through which the IC leads are inserted and then bent flat against the circuit foil When holes are the slotted type the following technique should be used to remove and replace the IC When working with boards using the familiar round hole use the standard technique as outlined in paragraphs 5 and 6 above Removal 1 Desolder and straighten each IC lead in one operation by gently prying up on the lead with the soldering iron tip as the solder melts 2 Draw away the melted solder with an anti static suction type solder removal device or with solder braid before removing the IC Replacement 1 Carefully insert the replacement IC in the circuit board 2 Carefully bend each IC lead against the circuit foil pad and solder it 3 Clean the soldered areas with a small wire bristle brush It is not necessary to reapply acrylic coating to the areas Small Signal Discrete Transistor Removal Replacement 1 Remove the defective transistor by clipping its leads as close as possible to the component body 2 Bend into a U shape the end of each of three leads remaining on the circuit board 3 Bend into a U shape the replacement transistor leads 4 Connect the replacement transistor leads to the corresponding leads extending from the circuit board and crimp the U with long nose pliers to insure metal to metal contact then solder each connection Power Output Transistor D
27. e interlocks with which receivers covered by this service manual might be equipped Do not apply AC power to this instrument and or any of its electrical assemblies unless all solid state device heat sinks are correctly installed Always connect the test receiver ground lead to the receiver chassis ground before connecting the test receiver positive lead Always remove the test receiver ground lead last 9 Use with this receiver only the test fixtures specified in this service manual CAUTION Do not connect the test fixture ground strap to any heat sink in this receiver Electrostatically Sensitive ES Devices Some semiconductor solid state devices can be damaged easily by static electricity Such components commonly are called Electrostatically Sensitive ES Devices Examples of typical ES devices are integrated circuits some field effect transistors and semiconductor chip components following techniques should be used to help reduce the incidence of component damage caused by static by static electricity 1 Immediately before handling any semiconductor component or semiconductor equipped assembly drain off any electrostatic charge on your body by touching a known earth ground Alternatively obtain and wear a commercially available discharging wrist strap device which should be removed to prevent potential shock reasons prior to applying power to the unit under test 2 After removing an electrica
28. electrical connection c Connecting a test substitute in parallel with an electrolytic capacitor in the receiver CAUTION A wrong part substitution or incorrect polarity installation of electrolytic capacitors may result in an explosion hazard d Discharging the picture tube anode Test high voltage only by measuring it with an appropriate high voltage meter or other voltage measuring device DVM FETVOM etc equipped with a suitable high voltage probe Do not test high voltage by drawing an arc Discharge the picture tube anode only by a first connecting one end of an insulated clip lead to the degaussing or kine aquadag grounding system shield at the point where the picture tube socket ground lead is connected and then b touch the other end of the insulated clip lead to the picture tube anode button using an insulating handle to avoid personal contact with high voltage Do not spray chemicals on or near this receiver or any of its assemblies Unless specified otherwise in this service manual clean electrical contacts only by applying the following mixture to the contacts with a pipe cleaner cotton tipped stick or comparable non abrasive applicator 10 by volume Acetone and 90 by volume isopropyl alcohol 9096 9996 strength CAUTION This is a flammable mixture Unless specified otherwise in this service manual lubrication of contacts in not required Do not defeat any plug socket B voltag
29. evice Removal Replacement 1 Heat and remove all solder from around the transistor leads 2 Remove the heat sink mounting screw if so equipped 3 Carefully remove the transistor from the heat sink of the circuit board 4 Insert new transistor in the circuit board 5 Solder each transistor lead and clip off excess lead 6 Replace heat sink Diode Removal Replacement 1 Remove defective diode by clipping its leads as close as possible to diode body 2 Bend the two remaining leads perpendicular y to the circuit board 3 Observing diode polarity wrap each lead of the new diode around the corresponding lead on the circuit board 4 Securely crimp each connection and solder it 5 Inspect on the circuit board copper side the solder joints of the two original leads If they are not shiny reheat them and if necessary apply additional solder Fuse and Conventional Resistor Removal Replacement 1 Clip each fuse or resistor lead at top of the circuit board hollow stake 2 Securely crimp the leads of replacement component around notch at stake top 3 Solder the connections CAUTION Maintain original spacing between the replaced component and adjacent components and the circuit board to prevent excessive componenttemperatures 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 sep
30. in84 Check C144 R172 Of U105 Check Crystal Pin96 Check X101 Pin97 Of U105 C153 C154 Check CCFL Enable Check pin5 of gt Inverter Fail pin85 of U105 CN101 Check R167 Q106 MCU Fail gt R108 R110 6 White Screen White Screen OK LVDS Cable gt Workmanship Reinsert NG OK Change LVDS LVDS Cable NG Cable NG NG heck Panel Enable Of U105 pin48 is High Check LVDS OK Signals Panel Fail NG heck the HW Rese Of U105 pin84 Check C144 R172 NG OK Check R168 R10 Q103 Q101 Check the pins Of U105 END 20 7 BAD SCREEN LVDS Cable Reinsert NG Change LVDS Cable NG heck Crystal Pin96 9 Of U105 OK heck the communication Of U105 and U106 OK Check the pins of U105 and U106 21 OK OK OK NG Workmanship LVDS Cable NG Check X101 C153 C154 Check SDO SCZ SCK SDI Reset WIRING DIAGRAM Connector Ass y P N 4303030004108 Connector Ass y f 430300600070R Connector Ass y P N 430300800550R Control Board Led Boord P N 790620500000R 22 EXPLODED VIEW 23 EXPLODED VIEW PARTS LIST INL MCK30284501 5010102053108 BEZELFRONT Siver LET20 60 MFB30282101 501120103100R LENS LET3O CC PCBA PWR amp INV B LE1730 6E0 80 AGU30210601 502060002000R HINGE ASSEMBLY LE1730 90 MCK30283101 501260202000R ST
31. irectly connected to the affected copper pattern 3 Connect insulated 20 gauge jumper wire from the lead of the nearest component on one side of the pattern break to the lead of the nearest component on the other side Carefully crimp and solder the connections CAUTION Be sure the insulated jumper wire is dressed so the it does not touch components or sharp edges TIMING CHART distingis Polo Frequency Total period Display hment rity kHz Hz E A H Pixels 25 175 31 469 GJ 28 321 31 468 9 4 V Lines H Pixels V Lines H Pixels V Lines H Pixels 8 25 175 31 469 8 V Lines 5 6 6 H Pixels V Lines V Lines H Pixels V Lines B ck Resolutio Porch B n 48 720 X 400 640 x 480 640 x 480 16 800 x 600 N oo o oo 800 x 600 Hs N N AR 832 x 624 ad Fe BES me uu E 23 EIE Ree LL s Eu p imer Re s pes pw ps BE a RE SEEMS S gesa EC E Frais DE puel B 0 9 46 875 1056 65 H Pixels V Lines 1024 6 3 7 4 6 4 6 4 6 7 57 283 49 725 74 55 48 363 78 75 60 123 1024 8 75 029 7 100 0 68 681 1152 H Pixels 61 805 1152 V Lines 65 96 H Pixels 108 0 63 981 1688 1280 V Lines ae 60 02 1024 H Pixels 135 0 79 976 1280 V Lines
32. l assembly equipped with ES devices place the assembly on a conductive surface such as aluminum foil to prevent electrostatic charge buildup or exposure of the assembly 3 Use only a grounded tip soldering iron to solder or unsolder ES devices 4 Use only an anti static type solder removal device Some solder removal devices not classified as anti static can generate electrical charges sufficient to damage ES devices 5 Do not use freon propelled chemicals These can generate electrical charges sufficient to damage ES devices 6 Do not remove a replacement ES device from its protective package until immediately before you are ready to install it Most replacement ES devices are packaged with leads electrically shorted together by conductive foam aluminum foil or comparable conductive material 7 Immediately before removing the protective material from the leads of a replacement ES device touch the protective material to the chassis or circuit assembly into which the device will be installed CAUTION Be sure no power is applied to the chassis or circuit and observe all other safety precautions 8 Minimize bodily motions when handling unpackaged replacement ES devices Otherwise harmless motion such as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity sufficient to damage an ES device General Soldering Guidelines 1 Use a grounded tip low w
33. l 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 135 2 This part consists of the Scaler ADC convertor and LVDS transmitter The Scaler 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 This part consists of the one 3 3V and one 1 8V regulators to convert power which is provided 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 by regulator Converted power is provided for IC in the main board The inverter converts from DC12V to AC 700Vrms and operates back light lamps of module 3 Part This part is include video controller part And this part consists of EEPROM IC which stores control data and the Micom which imbedded in scaler IC The Micom distinguishes polarity and frequency of the H V sync are supplied from signal cable The controlled data of each modes is stored in EEPROM 11 LIPS Board Block Diagram 50 60Hz LINE 100 240V PRIMARY SECONDARY 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
34. ution D sub Analog 1280 x 1024 75Hz PRECAUTION 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 not be exposed to the direct sunlight Avoid contact with water as it may a short circuit within the module If the surface of panel become dirty please wipe it off with a softmaterial Cleaning with a dirty or rough cloth may damage the panel
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