Table of Contents
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1.
PRECAUTION AND NOTICES ------------------------------------------------------------------------------------- 1~2
1.1. SAFETY PRECAUTIONS ---------------------------------------------------------------------------------------- 1
1.2. PRODUCT SAFETY NOTICE ----------------------------------------------------------------------------------- 1
1.3. SERVICE NOTES-------------------------------------------------------------------------------------------------- 1
2.
3.
SPECIFICATIONS ----------------------------------------------------------------------------------------------------- 2~4
3.1.
3.2.
3.3. D-SUB CONNECTOR -------------------------------------------------------------------------------------------- 4
4.
EXPLODED VIEW AND PARTS LIST --------------------------------------------------------------------------- 5~7
4.1. EXPLODED VIEW ------------------------------------------------------------------------------------------------ 5
4.2. EXPLODED VIEW PARTS LIST -------------------------------------------------------------------------------- 6
5.
BLOCK 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 POWER -------------------------------------------------------------------------------------------------------- 22
10.2. NO DISPLAY------------------------------------------------------------------------------------------------------- 23
10.3. NO SOUND -------------------------------------------------------------------------------------------------------- 24
11.
ADJUSTMENT---------------------------------------------------------------------------------------------------------- 25~26
11.1. ADJUSTMENT CONDITIONS AND PRECAUTIONS ------------------------------------------------------- 25
11.2. MAIN ADJUSTMENTS ------------------------------------------------------------------------------------------- 25
11.3. ALIGNMENT PROCEDURES----------------------------------------------------------------------------------- 25
12.
ELECTRICAL PARTS LIST ---------------------------------------------------------------------------------------- 27~34
L1512S Service Manual
TABLE OF CONTENTS
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---------------------------------------------------------------------------- 3~4
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PAGE
10/24/2002
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Summary of Contents for LG L1512S
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Page 1: Table Of Contents
L1512S Service Manual TABLE OF CONTENTS PAGE PRECAUTION AND NOTICES ------------------------------------------------------------------------------------- 1~2 1.1. SAFETY PRECAUTIONS ---------------------------------------------------------------------------------------- 1 1.2. PRODUCT SAFETY NOTICE ----------------------------------------------------------------------------------- 1 1.3. SERVICE NOTES-------------------------------------------------------------------------------------------------- 1 SERVICE TOOL & EQUIPMENT REQUIRED ---------------------------------------------------------- 2 SPECIFICATIONS ----------------------------------------------------------------------------------------------------- 2~4 PRODUCT SPECIFICATIONS 3.1. -
Page 2: Precaution And Notices
L1512S Service Manual 1. PRECAUTION AND NOTICES 1.1. SAFETY PRECAUTIONS This monitor is manufactured and tested on a ground principle that a user's safety comes first. However, improper use or installation may cause damage to the monitor as well as to the user. -
Page 3: Service Tool & Equipment Required
L1512S Service Manual 2. SERVICE TOOL & EQUIPMENT REQUIRED 1. SIGNAL GEN. 2. MULTIMETER 3. OSCILLOSCOPE 4. SCREW DRIVER 5. IRON 6. ABSORBER 7. SOLDER 8. DUMMY LOAD (5ohm/200W) 3. SPECIFICATIONS 3.1. PRODUCT SPECIFICATIONS LCD Panel 15.0" TFT Power Management... -
Page 4: Supporting Timing Chart
L1512S Service Manual 3.2. SUPPORTING TIMING CHART ITEM TIMING 720×400@70Hz 640×480@60Hz 640×480@67Hz 640×480@75Hz 800×600@56Hz Pixel Rate 28.322MHz 25.175MHz 30.240MHz 31.500MHz 36.000MHz H TOTAL 31.778us 31.778us 28.571us 26.667us 28.444us H DISPLAY 25.422us 25.422us 21.164us 20.317us 22.222us H B-Porch 1.907us 1.907us 3.175us 3.810us... -
Page 5: D-Sub Connector
L1512S Service Manual ITEM TIMING 1024×768@70Hz 1024×768@75Hz Pixel Rate 75.000MHz 78.750MHz H TOTAL 17.707us 16.660us H DISPLAY 13.653us 13.003us H B-Porch 1.920us 2.235us H Width 1.813us 1.219us H Border 0.000us 0.000us V TOTAL 14.272ms 13.328ms V DISPLAY 13.599ms 12.795ms V B-Porch 0.513ms... -
Page 6: Exploded View And Parts List
FIG.1 4.1. EXPLODED VIEW (L1512S) 5B07 2C01 5B05 2C11 5B06 2C03 1F01 5B01 5B15 1F31 1F09 X4 P988 V901 5B11 2C04 X2 5B08 MAIN PCB ASS'Y P987 1F07 1F04 5B09 X4 1F02 2C07 1F34 X2 FIG.1 KEYPAD PCB ASS'Y 1F24 X2... -
Page 7: Exploded View Parts List
1F25 2084730122 SCREW,BND T+ M3X12(BND T+) 1F31 2071964500 METAL FITTG L1512S SUPPORT SECC t=0.8 1F34 2063251800 SPACER SUPPORT L1512S NYLON 66 PBT+30%GF 1F36 2085740082 SCREW,B OTW+ SCREW B OTW+ M4X8 2C01 2022260601 CABI BACK L1515S PC+ABS 94V0 DARK GRAY 2C02 2071862000 BRACKET,FIX L1512S SECC 1.6t AC CABLE... -
Page 8: Block Diagram
5. BLOCK DIAGRAM 12V for INVERTER VCOM 3.6V VDDG 18V SWITCHING POWER SUPPLY AC 110~220V DC-DC 5V for system INPUT for PANEL POWER VEEG I108 AIC1341 I103,I104,I110 VDDA 9.2V Q105,Q106,Q107 5V to 3.3V Q108,Q114,Q115 3.3V to 2.5V DC_EN VDDD 3.3V OSC. -
Page 9: Schematic Diagram
R109 I101E VSYNC I102 C113 0.1u R110 VCLK DDC-SCL 74LVC14 VCC IS +3.3V DDC-SCL DDC-SDA 74LVC14 D12 NF4 C14 R11 I2 VSS SDA DDC-SDA 3 R111 0.1u 24LC21 I101F 8 PIN SOCKET P108 74LVC14 DDC-SCL1 3 DDC-SDA1 3 L1512S 10/24/2002... -
Page 10: Mvz
4700p 3.3-ANA 2365809996 TRACE> 30 MILS C144 C145 C146 R087 0.1u 0.1u 0.1u DA1 C45 R44 I3 XIN/CLK XOUT R088 R086 R144 +3.3V I113 P2781 X101 R091 1.2k R092 12MHZ R090 C147 C148 C090 680pf C091 R089 6800pf L1512S 10/24/2002... -
Page 11: Mcu
L108 DDC-SCL R183 2SA1020 C160 PWM0 C288 10uF/50V VDDD VOUT 470uF/16V DDC-SDA R172 SST3904 +3.3V R184 C209 C212 4.7K 0.1u 0.1u MRT DEBUG I/O/NC R173 P105 2.0 mm R171 L114 VDDCTRL +3.3V 3.3K Q103 SST3904 PLCC-44 SOCKET L1512S 10/24/2002 -10-... -
Page 12: Output Connector
0.1uF 33PX4 33PX4 CP11 C285 T_RB0 L160 0.1uF T_RB1 L161 T_RB2 L162 C217 10uF/50V T_RB3 L163 T_RB4 VCOM L164 T_RB5 L165 T_RB6 L166 C214 10uF/50V T_RB7 L167 VDDD RB[0..7] CP12 33PX4 C215 10uF/50V VDDG C216 VEEG L1512S 10/24/2002 -11- 10uF/50V... -
Page 13: Panel_Power
1.15K 1%/0603 D200 100uF/16V EP05QC04/SMD C316 C317 1uF/50V 1uF/50V Q108 R227 26.2V KSP2222A 0/0603 F102 D205 D206 0.25A/0603 EP05QC04/SMD EP05QC04/SMD R217 R218 3K3/0603 20K5,1%/0603 EN_18V C318 2.5V C319 47uF/50V I109 TL431A R219 3K3 1%/0603 VDDA VDDG 20ms Delay L1512S 10/24/2002 -12-... -
Page 14: Ac-Dc Power
R813 C820 100n/63V I803 R806 R812 TL431CLP 2K43K/1% 3K48/1% C810 Q801 0.033UF/100V MEF R807 JUMPER (1) Resistor - power rating is 1/8W , if not indicated. (2) AL-EL capacitor - temperture is 105'C , if not indicated. L1512S 10/24/2002 -13-... -
Page 15: Working Theorem
L1512S Service Manual 7. WORKING THEOREM A. DC-DC CONVERTER This block provides adjustable output voltages of 9.2V, -6V, 18V and 3 to 4V for the panel. It consists of a Q114 transistor and power switch IC I108 (AIC 1526-1). When DC_ EN signal is high, then Q114 is activated and send one signal to activate I108. -
Page 16: Wiring Diagram
8. WIRING DIAGRAM (L1512S) LCD PANEL INVERTER PCB L902 L901 P981 P983 TO:GND P980 P802 P802 POWER PCB MAIN PCB TO:METAL FITTG P982 P801 P701 (BRN) (BLU) KEYPAD PCB (BLU) (BRN) P985 P963 I/O CABLE AC SOCKET ASS'Y... -
Page 17: Pcb Layout
9. PCB LAYOUT 9.1. MAIN PCB TOP VIEW L1512S 10/24/2002 -16-... -
Page 19: Con Pcb Top View
9.3. CON PCB TOP VIEW L1512S 10/24/2002 -18-... -
Page 21: Power Pcb Top View
9.5. POWER PCB TOP VIEW L1512S 10/24/2002 -20-... -
Page 23: Trouble Shooting Flow Chart
L1512S Service Manual 10. TROUBLE SHOOTING FLOW CHART 10.1. NO POWER Start Check D804,D807, I801,I802,I803 C101 D801,F801 I101 Replace I101 Failed? Check Q101,I107,Q114 C314,C319 9.2V Check L111,D203, C308 I108,Q106 Check 18V on F102 Q108,I109,F102 Check -6V on D201,D202,F103, F103 C302,Q105,I106... -
Page 24: No Display
L1512S Service Manual 10.2. NO DISPLAY Display Dark Amber Check Power Check IO cable is Check I/P signal is in Check LED Color region connect OK ? pwr saving state? Amber & Green Check X100 Crystal Check I002 is OK ? -
Page 25: No Sound
L1512S Service Manual 10.3. NO SOUND Speaker Earphone no sound Sound Check Q010 Adjust OSD Collector has Check Volume Volume control PWM output ? Control Pin 1&7 to Max. and Voltage 0.4~0.85V ? Check Pin 1&7 Voltage >0.4V Check Check if I601 Pin 4 Check if Speaker is R602 &... -
Page 26: Adjustment
L1512S Service Manual 11. ADJUSTMENT 11.1. ADJUSTMENT CONDITIONS AND PRECAUTIONS 1. Approximately 30 minutes should be allowed for warm up before proceeding. 2. Adjustments should be undertaken only on those necessary elements since most of them have been carefully preset at the factory. - Page 27 L1512S Service Manual 6500K verify : press “ ▼ ” ,“ ▲ ” key to move cursor to 6500K at factory mode and press “ 2 “ key, and then check the color temperature is x=0.310 ± 0.03 y=0.330 ± 0.03 Y ≧...
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Page 28: Electrical Parts List
L1512S Service Manual 12. ELECTRICAL PARTS LIST When you place a parts order, be sure to indicate the following data on the order: Location No. Parts No. Description LOC NO. SOURCE PART NO. DESCRIPTION SPECIFICATION REMARK MAIN P.C.BOARD CP01 2340733008 CAP,ARRAY P=0.8 85'C 1206Y5V... - Page 29 L1512S Service Manual LOC NO. SOURCE PART NO. DESCRIPTION SPECIFICATION REMARK C144 2346410496 CAP,CHIP 85'C 1608Y5V 0.100UF C145 2346410496 CAP,CHIP 85'C 1608Y5V 0.100UF C146 2346410496 CAP,CHIP 85'C 1608Y5V 0.100UF C147 2341122096 CAP,CHIP 125'C 1608COG 22.000PF C148 2341122096 CAP,CHIP 125'C 1608COG 22.000PF...
- Page 30 L1512S Service Manual LOC NO. SOURCE PART NO. DESCRIPTION SPECIFICATION REMARK D108 2364600196 DIODE,SWITCH SMD LL4148 3.5X1.5φ TEMIC GS08 D109 2364200896 DIODE,RECT(SMD) BAS32L PHILIPS D109 2364600196 DIODE,SWITCH SMD LL4148 3.5X1.5φ TEMIC GS08 D110 2364200896 DIODE,RECT(SMD) BAS32L PHILIPS D110 2364600196 DIODE,SWITCH SMD LL4148 3.5X1.5φ...
- Page 31 L1512S Service Manual LOC NO. SOURCE PART NO. DESCRIPTION SPECIFICATION REMARK L102 2379832096 BEAD,HI-IMPEDANCE 2012MZ 32.00OHM I<300mA L103 2379832096 BEAD,HI-IMPEDANCE 2012MZ 32.00OHM I<300mA L104 2379820196 BEAD,HI-IMPEDANCE 2012MZ 200.00OHM I<200MA L105 2379820196 BEAD,HI-IMPEDANCE 2012MZ 200.00OHM I<200MA L106 2379820196 BEAD,HI-IMPEDANCE 2012MZ 200.00OHM I<200MA...
- Page 32 L1512S Service Manual LOC NO. SOURCE PART NO. DESCRIPTION SPECIFICATION REMARK Q103 2360300896 XISTOR,NPN R SMD MMBT3904 FAIRCHILD SOT23 Q103 2360301296 XISTOR,NPN R SMD MMBT3904 DIODES SOT-23 Q103 2360300596 XISTOR,NPN R SMD MMBT3904-7 VISHAY S0T-23 Q104 2361111191 XISTOR,PNP R 2SA1020(Y)
- Page 33 L1512S Service Manual LOC NO. SOURCE PART NO. DESCRIPTION SPECIFICATION REMARK R139 2379380006 BEAD,HI-IMPEDANCE 1608 Z=80ohm(200MHz) R141 2379380006 BEAD,HI-IMPEDANCE 1608 Z=80ohm(200MHz) R142 2253200096 RES,CHIP 1/10W RC 1/10W 0.00 T1608 R143 2253222096 RES,CHIP 1/10W RC 1/10W 22.00 T1608 R144 2253210596 RES,CHIP 1/10W RC 1/10W 1.00M...
- Page 34 SWITCH,PU-TC TSAA-2 HUAJIE S704 2403702200 SWITCH,PU-TC TSAA-2 HUAJIE S705 2403702200 SWITCH,PU-TC TSAA-2 HUAJIE U701 2202511400 PCB MULTILAYER L1512S KEY FR4*2 168X12 POWER P.C.BOARD C801 2300922401 CAP,MTL MINI 0.220UF 275V C802 2287247212 CAP,CER CK45F 4700.000PF 250VAC M C803 2287247212 CAP,CER CK45F 4700.000PF 250VAC M...
- Page 35 L1512S Service Manual LOC NO. SOURCE PART NO. DESCRIPTION SPECIFICATION REMARK R811 2239247015 RES,PRE 1/4 S RN 1/4WS 4.70K R812 2239224315 RES,PRE 1/4 S RN 1/4WS 2.43K R813 2233410195 RES,CBN 1/4 S RD 1/4WS 100.00 R814 2239222015 RES,PRE 1/4 S RN 1/4WS 2.20K...