LG L1512S Service Manual Download Page 8

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SWITCHING POWER SUPPLY

5V for system

AC 110~220V
INPUT

12V for INVERTER

Hsync

Vsync

BUF
I101
74LCV14

PA-HSYNC

PA-VSYNC

I102
24LC21
EEPROM DDC

SDA/SCL

FROM
D-SUB
15 PIN

I105

8051PLCC

OSC.
12MHZ
X100

KEYPAD

LCD FLAT PANEL

48 Bits

I2C BUS

INVERTER

TO
BACKLIGHT
High Volt

CPH1

STH1,LP,INV1,INV2
POL,STV1,CPV

MRT

MASCOT VZ

I001
LCD CONTROLLER
ADC+ T-CON

DC-DC
for PANEL POWER

VCOM 3.6V

VDDG 18V

VEEG -6V

VDDA 9.2V

VDDD 3.3V

BLT_ON

DC_EN

BRIGHTNESS

I100
24LC16B
EEPROM

EDID I2C BUS

15 inch LCD MONITOR BLOCK DIAGRAM

OSC.
12MHZ
X101

I108 AIC1341
Q105,Q106,Q107
Q108,Q114,Q115

I103,I104,I110
5V to 3.3V
3.3V to 2.5V

3.3V

2.5V

5. BLOCK DIAGRAM

10/24/2002 -7-

Summary of Contents for L1512S

Page 1: ...DIAGRAM 7 6 SCHEMATIC DIAGRAM 8 14 6 1 VGA INPUT 8 6 2 MVZ 9 6 3 MCU 10 6 4 OUTPUT CONNECTOR 11 6 5 Panel_Power 12 6 6 AC DC Power 13 7 WORKING THEOREM 14 8 WIRING DIAGRAM 15 9 PCB LAYOUT 16 21 9 1 MAIN PCB TOP VIEW 16 9 2 MAIN PCB BOTTOM VIEW 17 9 3 CON PCB TOP VIEW 18 9 4 CON PCB BOTTOM VIEW 19 9 5 POWER PCB TOP VIEW 20 9 6 POWER PCB BOTTOM VIEW 21 10 TROUBLE SHOOTING FLOW CHART 22 24 10 1 NO PO...

Page 2: ...er cable immediately and consult your service technician Always unplug the monitor before cleaning it Clean the cabinet with a clean dry cloth Apply non ammonia based cleaner onto the cloth not directly onto the glass screen Keep the monitor away from magnetic objects motors TV sets and transformer Do not place heavy objects on the monitor or power cord 1 2 PRODUCT SAFETY NOTICE Many electrical an...

Page 3: ...ayable Resolution XGA 1024 768 max Pixel Dimension 0 297 0 297mm LCD Display Color 16 7M Color Max 8bit Viewing Angle CR 10 Horizontal 60 60 Vertical 55 45 Tilt 20 3 Contrast Ratio 200 1 min 350 1 typ Brightness 200cd m2 min 250 cd m2 typ Response Time Tr 13 ms Tf 27ms typ Active Display Area 304 1mm 228 1mm Temperature Operating 0 C 40 C Storage 20 C 60 C Compliance TCO99 UL cUL Nemko CE TÜV GS F...

Page 4: ...s Width 0 064ms 0 064ms 0 086ms 0 080ms 0 057ms V Border 0 222ms 0 254ms 0 000ms 0 000ms 0 000ms H V Sync Interlace No No No No No ITEM 6 7 8 9 10 TIMING 800 600 60Hz 800 600 72Hz 800 600 75Hz 832 624 74 5Hz 1024 768 60Hz Pixel Rate 40 000MHz 50 000MHz 48 500MHz 57 280MHz 65 000MHz H TOTAL 26 400us 20 800us 21 333us 20 112us 20 677us H DISPLAY 20 000us 16 000us 16 162us 14 525us 15 754us H B Porch...

Page 5: ...599ms 12 795ms V B Porch 0 513ms 0 466ms Vs Width 0 106ms 0 050ms V Border 0 000ms 0 000ms H V Sync Interlace No No 3 3 D SUB CONNECTOR D SUB 15 PIN CONNECTOR SIGNAL LEVEL CONNECTOR SIGNAL DESCRIPTION R RED 0 7vp p VIDEO G GREEN 0 7vp p VIDEO B BLUE 0 7vp p VIDEO H H SYNC TTL positive or negative V V SYNC TTL positive or negative SDA DDC1 2B TTL SCL DDC1 2B TTL 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 ...

Page 6: ...X2 1F09 X4 1F09 X4 KEYPAD PCB ASS Y A 1F13 X6 9R01 FIG 2 1F22 X4 P983 MAIN PCB ASS Y 1F15 X4 U901 1F21 1F11 1F18 X2 1F08 X2 P985 2C10 1F19 X2 FIG 4 FIG 3 FIG 4 1F34 X2 A P987 1F10 X2 V901 1F07 1F25 X2 1F08 X4 1F36 1F12 2C02 P963 SCREW X4 5B10 5B07 5B05 5B06 5B01 5B11 P988 X4 5B08 5B15 X4 5B04 FIG 1 2C03 5B09 X4 2C07 2C11 2C01 1F31 1F31 2C04 X2 ...

Page 7: ...ER SUPPORT L1512S NYLON 66 PBT 30 GF 2 1F36 2085740082 SCREW B OTW SCREW B OTW M4X8 1 2C01 2022260601 CABI BACK L1515S PC ABS 94V0 DARK GRAY 1 2C02 2071862000 BRACKET FIX L1512S SECC 1 6t AC CABLE 1 2C03 2054255101 ORNAMENT L1512S PC ABS ER 95 94V0 1 2C04 2084730102 SCREW BND T M3X10 BND T 2 2C07 2027256501 DUST COVER L1512S PC ABS 94V0 ER 95 1 2C10 2071862100 BRACKET FIX L1512S SECC 1 6t POWER 1 ...

Page 8: ... Bits I2C BUS INVERTER TO BACKLIGHT High Volt CPH1 STH1 LP INV1 INV2 POL STV1 CPV MRT MASCOT VZ I001 LCD CONTROLLER ADC SCALAR T CON DC DC for PANEL POWER VCOM 3 6V VDDG 18V VEEG 6V VDDA 9 2V VDDD 3 3V BLT_ON DC_EN BRIGHTNESS I100 24LC16B EEPROM EDID I2C BUS 15 inch LCD MONITOR BLOCK DIAGRAM OSC 12MHZ X101 I108 AIC1341 Q105 Q106 Q107 Q108 Q114 Q115 I103 I104 I110 5V to 3 3V 3 3V to 2 5V 3 3V 2 5V ...

Page 9: ... C110 150pF C108 10P L103 32 R110 150 L102 32 R103 100 C113 0 1u R107 100 P108 8 PIN SOCKET S703 S701 S704 S705 C172 NC P701 8 HEADER 2mm 1 2 3 4 5 6 7 8 S702 D701 C101 0 1u C102 0 1u R100 75 J101 CONN RCPT 13 1 2 3 4 5 6 7 8 9 10 11 12 13 1 2 3 4 5 6 7 8 9 10 11 12 13 C100 NC C103 0 1u I101C 74LVC14 5 6 I101B 74LVC14 3 4 I101E 74LVC14 11 10 I101D 74LVC14 9 8 R229 330 I101F 74LVC14 13 12 R101 75 R...

Page 10: ...4 153 152 151 150 149 148 147 146 145 144 143 142 141 140 139 138 137 136 135 134 133 132 131 130 129 128 127 126 125 124 123 122 121 16 DIBVDD CAP_HREF CAP_HSYNC CAP_VSYNC DIBVSS BLU_INB_0 BLU_INB_1 BLU_INB_2 BLU_INB_3 BLU_INB_4 BLU_INB_5 BLU_INB_6 BLU_INB_7 DCVDD GRN_INB_0 GRN_INB_2 GRN_INB_3 GRN_INB_4 GRN_INB_5 GRN_INB_6 GRN_INB_7 DCVSS RED_INB_0 RED_INB_1 UV1 RED_INB_2 RED_INB_3 RED_INB_4 RED_...

Page 11: ...12 LT1117CST 3 3 1 2 3 GND VOUT VIN I105 8051PLCC 35 21 20 10 14 15 16 17 2 3 4 5 6 7 8 9 43 42 41 40 39 38 37 36 24 25 26 27 28 29 30 31 19 18 32 33 13 11 44 22 23 34 1 12 EA VP X1 X2 RESET INT0 P3 2 INT1 P3 3 T0 P3 4 T1 P3 5 P1 0 T2 P1 1 T2EX P1 2 P1 3 P1 4 P1 5 P1 6 P1 7 AD0 P0 0 AD1 P0 1 AD2 P0 2 AD3 P0 3 AD4 P0 4 AD5 P0 5 AD6 P0 6 AD7 P0 7 A8 P2 0 A9 P2 1 A10 P2 2 A11 P2 3 A12 P2 4 A13 P2 5 A...

Page 12: ...NV1 2 INV2 2 VDDA 5 CPH1 2 VCOM J106 CON50 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 J105 CON50 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 CP10 33PX4 1 5 2 6 3 7 4 8 CP09 33PX4 1 5 2 6 3 7 4 8 C286 0 1uF...

Page 13: ...5 21K 1 0603 C307 220uF 16V L111 33uH F102 0 25A 0603 R209 5K6 0603 C312 22nF 0603 R211 12K 0603 C308 100uF 16V I108 AIC1341 SMD 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Phase Ugate SD VCC SS FB2 Vin2 Gate2 GND GATE3 FB3 COMP1 FB1 OCSET Pgnd Lgate R215 1 47K 1 0603 R217 3K3 0603 R210 110 0603 R216 1 15K 1 0603 R218 20K5 1 0603 R20736K R219 3K3 1 0603 C314 10uF 50V R213 3 3K 0603 I109 TL431A D202 EP0...

Page 14: ...V F801 2 5A 250V T801 L 1 2mH 9 3 5 6 1 2 7 8 11 10 12 C814 1500uF 10V Q801 NC R804 430K 3W 1 2 C801 0 22uF 275V C809 100n 50V 1 2 C808 47uF 50V 1 2 R807 JUMPER C811 NA 1 2 C823 4700pF 250Vac 1 2 R812 2K43K 1 C824 0 22uF 275V R814 2K2 1 R815 120 1W L804 15UH P802 S5B XH A 5P P 2 5 1 2 3 4 5 C816 NC R817 1K C815 1500uF 10V 1 2 L802 Bead T3 5x0 8x9 D807 6 2V D806 15V R806 3K48 1 R813 100 R810 20K 1 ...

Page 15: ...ffers that allows support to a wide range of LCD panels The scalar implements four advanced display technologies 1 Sampling RGB input signals by fully integrated triple channel ADC PLL and pre amplifier 2 Automatically calibrate for vertical and horizontal alignment to center display and phase calibration 3 High quality advanced scaling Enhanced and adaptive scaling algorithm for optimal image qua...

Page 16: ...L P980 GND TO METAL FITTG POWER PCB BRN BLU P701 P801 P982 P802 INVERTER PCB JP2 TO GND JP1 JP3 P802 P983 I O CABLE P981 BRN AC SOCKET ASS Y N BLU L KEYPAD PCB P985 J103 J101 J105 1 I105 J109 J106 I001 50 1 J107 J110 50 J108 MAIN PCB P963 L901 L902 ...

Page 17: ...L1512S 10 24 2002 16 9 1 MAIN PCB TOP VIEW 9 PCB LAYOUT ...

Page 18: ......

Page 19: ...9 3 CON PCB TOP VIEW L1512S 10 24 2002 18 ...

Page 20: ......

Page 21: ...L1512S 10 24 2002 20 9 5 POWER PCB TOP VIEW ...

Page 22: ......

Page 23: ...t 5V on C101 I101 is Failed 5V on C314 C319 9 2V on C308 18V on F102 Check 3 4V Q107 C315 I108 Check D804 D807 I801 I802 I803 D801 F801 Replace I101 Check Q101 I107 Q114 Check L111 D203 I108 Q106 Check Q108 I109 F102 N Y Y N N N N Y Y Y 6V on F103 Check D201 D202 F103 C302 Q105 I106 N Y ...

Page 24: ...is green or dark Check uP I105 Reset is Ok No Change I105 Yes Check Reset circuit Q113 D113 No Yes Press 1 key if OSD menu is on display Yes Check Keypad pcb is OK No Check if Inverter is Ok Yes Change Inverter No Check I001 MVZ if RST Pin 155 have reset pulse Check uP I105 pin 24 send reset pulse No Yes Check X101 Crystal 12MHz is working Change X101 No Yes Yes Check J105 J106 data bus have signa...

Page 25: ...e Control Pin 1 7 Voltage 0 4 0 85V Adjust OSD Volume control to Max and Check Pin 1 7 Voltage 0 4V Check Q010 Collector has PWM output No Check R602 R605 is OK Check if Speaker is OK Check if I601 Pin 4 Vp 12V No Yes No Yes Change I601 TDA7057AQ Yes Yes Yes Earphone no sound Yes ...

Page 26: ...and white balance adjustments C Signals reference the front detail specifications and timing table Video reference the front detail specifications 1 Adjustment of V com Voltage A Timing 1024x768 60Hz B Pattern The picture of Shut down windows or Full screen pixel ON OFF pattern C Adjust R124 to let the center of the screen no flash 2 Eeprom Initial A Timing 1024x768 60Hz B Pattern Cross hatch C Sw...

Page 27: ...r to 9300K at factory mode and press 2 key and then check the color temperature is x 0 283 0 03 y 0 298 0 03 4 Geometry A Pattern Cross hatch B Change each mode on the timing table in turns and excute the Auto Adjust function on the OSD menu then all the data of the each mode will be auto saved after finish the Auto Adjust function C Until all of modes are agjusted press 1 to exit OSD menu and swi...

Page 28: ...COG 150 000PF 50V J C111 2341133096 CAP CHIP 125 C 1608COG 33 000PF 50V J C112 2346410496 CAP CHIP 85 C 1608Y5V 0 100UF 50V Z C113 2346410496 CAP CHIP 85 C 1608Y5V 0 100UF 50V Z C114 2333322601 CAP ELE 105 C 22uF 16V 5 11 P 2 0 C115 2333322701 CAP ELE 105 C 220uF 16V 6 3 11 P 2 5 C116 2333322601 CAP ELE 105 C 22uF 16V 5 11 P 2 0 C117 2333610601 CAP ELE 105 C 10uF 50V 5 11 P 2 0 C118 2333322601 CAP...

Page 29: ... 2 0 C282 2333347701 CAP ELE 105 C 470uF 16V 10 12 5 P 5 0 C283 2346410496 CAP CHIP 85 C 1608Y5V 0 100UF 50V Z C284 2346410496 CAP CHIP 85 C 1608Y5V 0 100UF 50V Z C285 2346410496 CAP CHIP 85 C 1608Y5V 0 100UF 50V Z C286 2346410496 CAP CHIP 85 C 1608Y5V 0 100UF 50V Z C287 2346410496 CAP CHIP 85 C 1608Y5V 0 100UF 50V Z C288 2333347701 CAP ELE 105 C 470uF 16V 10 12 5 P 5 0 C300 2346410496 CAP CHIP 85...

Page 30: ...801 FUSE SMD 0 25A 50V KMD025 0603 DAITO F103 RB 2213625802 FUSE SMD 0 25A 32V LF 0434 250 LITTEL I001 2365924596 IC DIGITAL SMD MASCOT VZ MRT 160P PQFP I100 RA 2365316200 IC LINEAR 24LC16B MICROCHI I100 RB 2365424000 IC DIGITAL AM24LC16 PDIP 8L ATC I101 RA 2365921996 IC DIGITAL SMD SN74LVC14AD TI I101 RB 2365922496 IC DIGITAL SMD 74LVC14A PHILIPS SO14 I102 RA 2365412600 IC DIGITAL 24LC21A P MICRO...

Page 31: ...0MHz L140 2379380006 BEAD HI IMPEDANCE 1608 Z 80ohm 200MHz L141 2379380006 BEAD HI IMPEDANCE 1608 Z 80ohm 200MHz L142 2379380006 BEAD HI IMPEDANCE 1608 Z 80ohm 200MHz L143 2379380006 BEAD HI IMPEDANCE 1608 Z 80ohm 200MHz L144 2379380006 BEAD HI IMPEDANCE 1608 Z 80ohm 200MHz L145 2379380006 BEAD HI IMPEDANCE 1608 Z 80ohm 200MHz L146 2379380006 BEAD HI IMPEDANCE 1608 Z 80ohm 200MHz L147 2379380006 B...

Page 32: ...00MHz R079 2253233296 RES CHIP 1 10W RC 1 10W 3 30K J T1608 R080 2253233296 RES CHIP 1 10W RC 1 10W 3 30K J T1608 R081 2253215196 RES CHIP 1 10W RC 1 10W 150 00 J T1608 R082 2253215196 RES CHIP 1 10W RC 1 10W 150 00 J T1608 R083 2253215196 RES CHIP 1 10W RC 1 10W 150 00 J T1608 R084 2253200096 RES CHIP 1 10W RC 1 10W 0 00 J T1608 R090 2253200096 RES CHIP 1 10W RC 1 10W 0 00 J T1608 R091 2253212296...

Page 33: ...RES CHIP 1 10W RC 1 10W 4 70K J T1608 R191 2253247296 RES CHIP 1 10W RC 1 10W 4 70K J T1608 R194 2253210496 RES CHIP 1 10W RC 1 10W 100 00K J T1608 R195 2253222296 RES CHIP 1 10W RC 1 10W 2 20K J T1608 R196 2253247296 RES CHIP 1 10W RC 1 10W 4 70K J T1608 R197 2253247296 RES CHIP 1 10W RC 1 10W 4 70K J T1608 R198 2253247296 RES CHIP 1 10W RC 1 10W 4 70K J T1608 R200 2253210396 RES CHIP 1 10W RC 1 ...

Page 34: ...00V K C823 2287247212 CAP CER CK45F 4700 000PF 250VAC M C824 2300922401 CAP MTL MINI 0 220UF 275V M D801 RA 2368502200 RECT BRIDGE GSIB460 4A 600V GS D801 RB 2368502100 RECT BRIDGE KBJ4J 4A 600V CHENMKO D802 RA 2363223195 DIODE RECT UF4007 GS D802 RB 2363231995 DIODE RECT UF4007 PEC D803 RA 2363223095 DIODE RECT UF4005 GS D803 RB 2363221495 DIODE RECT UF4005G PEC D804 RA 2363225500 DIODE RECT FCH2...

Page 35: ...RE K5A RP 31 3 12 AD CORE TECH L902 2379105600 FERRITE CORE K5A RP 31 3 12 AD CORE TECH P951 2427130110 POWER CORD KOREA WALL 1 83M BLACK KOREA P951 2427130047 POWER CORD E WALL 1 8M BLACK EUROPE P951 2427130046 POWER CORD USA WALL 1 8M BLACK USA P961 2427501118 I O CABLE D15M 2 3 6C 1 83M BLACK PC99 P963 2427501154 I O CABLE D15 C13 20276 3 6 240L GE96750 P980 2420309001 FFC CABLE 90L 25 5W 0 05T...

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