LG 15LW1R Service Manual
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LG 15LW1R Service Manual

LG 15LW1R Service Manual

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LCD TV

SERVICE MANUAL

CHASSIS : ML-042A
MODEL: 15LW1R
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
website:http://biz.LGservice.com
e-mail:http://www.LGEservice.com/techsup.html
(15LW1R-MD)

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Summary of Contents for LG 15LW1R

  • Page 1: Service Manual

    LCD TV SERVICE MANUAL CHASSIS : ML-042A MODEL: 15LW1R (15LW1R-MD) CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

  • Page 2: Table Of Contents

    CONTENTS CONTENTS ....................2 PRODUCT SAFETY ..................3 SPECIFICATION ..................6 DISASSEMBLY ..................9 SERVICE TEST PROGRAM ..............11 TROUBLE SHOOTING ................16 BLOCK DIAGRAM...................25 WIRING DIAGRAM ..................30 EXPLODED VIEW .................. 31 REPLACEMENT PARTS LIST ............... 35 SVC. SHEET ....................- 2 -...

  • Page 3: Safety Precautions

    SAFETY PRECAUTIONS IMPORTANT SAFETY NOTICE Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by in the Schematic Diagram and Replacement Parts List. It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent X-RADIATION, Shock, Fire, or other Hazards.

  • Page 4: Servicing Precautions

    SERVICING PRECAUTIONS CAUTION: Before servicing receivers covered by this service unit under test. manual and its supplements and addenda, read and follow the 2. After removing an electrical assembly equipped with ES SAFETY PRECAUTIONS on page 3 of this publication. devices, place the assembly on a conductive surface such as NOTE: If unforeseen circumstances create conflict between the aluminum foil, to prevent electrostatic charge buildup or...
  • Page 5 IC Remove/Replacement Some chassis circuit boards have slotted holes (oblong) through Circuit Board Foil Repair which the IC leads are inserted and then bent flat against the Excessive heat applied to the copper foil of any printed circuit circuit foil. When holes are the slotted type, the following technique board will weaken the adhesive that bonds the foil to the circuit should be used to remove and replace the IC.

  • Page 6: Contents

    SPECIFICATION NOTE : Specifications and others are subject to change without notice for improvement. 1. Application range This specification is applied to ML-042A chassis. 2. Requirement for Test Testing for standard of each part must be followed in below condition. (1) Temperature: 25°C ±...
  • Page 7 5. Engineering Specification Item Content Remark Response Time Rise Time (typ) : 5ms TX LED Power LED Blue LED POWER off mode (No adapter) POWER off mode Amber (adapter) POWER on mode Green (network disconnected) POWER on mode Green Blue (network connected) RX battery LED Battery...
  • Page 8 6. Optical Character Item Criteria Remark Viewing Angle Horizontal(R/L) : 65¡£ / 65¡£ (Typ.) (R¡ˆ10) Vertical(Top/Bottom) : 45¡£ / 55¡£ (Typ.) Luminance Average Luminance (cd/m2) 450(typ) Luminance Uniformity(%) Contrast Ratio 400(normal) CIE Color Coordinates Min. Normal Max. White 0.286 0.289 0.292 0.301 0.304...

  • Page 9: Disassembly

    DISASSEMBLY - Remove screws attached to stand by coin or (-) driver. - Remove the battery. - Disassembly Stand from Set. - Disassembly Back cover after press the battery as pull the - Remove Speaker's screws of both sides. edge of Back cover by hand as the picture. AL Tape AL Tape - Remove the POWER PCB screw.
  • Page 10 DISASSEMBLY - Remove screws in stand. - Push the cover to arrow direction. - Lift cover. - Remove screws. Al tape - Remove antenna and AL Tape as the picture. - Remove screws of Rear shield. - Lift Rear shield as the picture. - 10 -...

  • Page 11: Service Test Program

    SERVICE TEST PROGRAM (2) LED Test 1. Test Items - LED Operation Test of Rx (MICOM : 1.3.0, ROMFS : 1.2 12/21 ENG), TX SSID : 80035E (Rx Micom/Rx Flash/ Version Display), TX SSID display Test Items - LED : Rx LED Operation Test (MICOM : 1.3.0, ROMFS : Version Blinking in blue color...
  • Page 12 (4) Brightens/Contrast Adjust -1 (5) Brightens/Contrast Adjust -2 - Adjust brightness value of the RX terminal - Adjust brightness value of the RX terminal when value less than - Contrast has default of "138", not changed.(Number check "-11" is required requied) - Input signal: None - Brightness Spec : 0.60~0.75 cd/m2...
  • Page 13 (6) Button Test (7) Battery Test - Test whether there is key control operation of the RX - Battery information display Test Items Test Items (MICOM : 1.3.0, ROMFS : (MICOM : 1.3.0, ROMFS : Remained battery capacity display (%) 1.2 12/21 ENG), TX SSID : 1.2 12/21 ENG), TX SSID : Non-mounting of battery: N/A...
  • Page 14 (9) RX Factory Default (11) TX - Rx Factory Mode (Initialization Mode) - TX Version display/Long Run Mode/TX Factory Default (Initialization Mode) Test Items (MICOM : 1.3.0, ROMFS : Test Items 1.2 12/21 ENG), TX SSID : (MICOM : 1.3.0, ROMFS : 80035E 1.2 12/21 ENG), TX SSID : * LED...
  • Page 15 (13) Canadian VCHIP 3. RX/TX Release Mode Initialization - Canadian VCHIP Yes/No - Release mode initialization : TX terminal: VCTI EEPROM initialization Test Items : RX terminal : Initialization of User Flash Data (Volume/Brightness) (MICOM : 1.3.0, ROMFS : except for SSID 1.2 12/21 ENG), TX SSID : 80035E - Initialization method...

  • Page 16: Troubleshooting

    TROUBLESHOOTING 1. OUT OF ORDER ON POWER (TX) NO POWER (POWER INDICATOR OFF) Check Check PWRIN signal 16V or Connector(J1007) Replace Power Adapter on Main Board Fail Fail on Power Adapter Pass Check Check 5V signal Replace or check soldering LTC1628(U1006) on VCC5.0V_VCT on Main of LCT1628 (U1006)
  • Page 17 2. OUT OF ORDER ON BOOTING (TX) No Booting Check Check Replace or check soldering VCC3.3V signal on Main LTC1628 (U1006) on of LCT1628 Board Fail Main Board Fail Replace or check soldering Pass Check VCC1.8V signal of FAN1117(U1001) Fail Check 6MHz Crystal (X1402) Check Crystal circuit...
  • Page 18 3. OUT OF ORDER ON MPEG (TX) No MPEG Encoding or Encoding Error Check Replace or check soldering VCC1.25V signal on of FAN1117(U1001) Fail Main Board Pass Check MPEG_27M signal on Check 27MHz OSC Block Main Board Fail Pass Check Check bonding of clock signal (135MHz) of CX23416 (U502) or...
  • Page 19 4. OUT OF ORDER ON TV (TX) NO TV Signal or Noise (POWER INDICATOR OK) Check Check Reprogram or Replace VCC33V signal on PWM_50KHZ signal on VCT4973(U603) Main Board Main Board Fail Fail Check Pass TR & Diode on TV Tuner Replace TR &...
  • Page 20 5. POWER PART(POWER BOARD) (RX) No Power Check DCIN Replace Adapter 16V or not? Check the voltage of the pin no. Replace Q205 1 & 3 on Q205. 16V or not ? Check the voltage of the pin No. 24 Replace R206 on U301.
  • Page 21 6. POWER PART(MAIN BOARD) (RX) No power Check blue LEDs. Check VCC3.3VSB and ON or not? U1202. Check the voltage of pin No. 1 on Check R1204, CB1204, Q1902. U1201 and U1202 3.3V or not ? Check the voltage of pin No. Replace Q1901 5,6,7and 8 on Q1901.
  • Page 22 7. VIDEO PART (RX) No video Check VCCINV Replace Q206 on the 16V or not ? Power Board Check Replace Cable and check Inverter Cable J302 on the power Board OK or not ? Check VCCLCD Check Q1904 5V or not ? Check the clock of pin no.
  • Page 23 8. AUDIO PART (RX) No audio Check Connect the cable on connection of Cable on J1301 J1301 OK or not ? Check connection of Speaker Connect the Speaker Cable Cable OK or not ? Check the voltage of FB1302 Check FB1302 5V or not ? Check the Check U1302, C1301,...
  • Page 24 9. BETTERY PART (RX) Can’t battery-charging Check the battery Correct the battery connection connection OK or not ? Check connection of the cable Check the Cable between J201 on power connection board and J1901 on main board OK or not ? Check voltage of pin no.
  • Page 25 - 25 -...

  • Page 26: Block Diagram

    LVDS device. The LVDS device interfaces with LCD module. 2. Wireless LAN The Wireless LAN Card which is used in the product is manufactured by LG Innotek. The card satisfied with IEEE802.11 b/g standard. The product name is LVMM-3001A.
  • Page 27 - 27 -...
  • Page 28 WIRELESS TV TX BOARD BLOCK DIAGRAM (TX) PCI Rev 2.1 compliant S3C2800 VCT4973 PWR_ Power Wireless LAN On/Off Block P_AD[0..31] Controller POWER_ Power Tact TACT Switch P_AD[0..31] SDA_1 Video Memory SCL_1 TV_Tuner 8Mbytes MPEG Encoder SDA_1 CX23416 SCL_1 VIDIN[0..7] Video ADC Flash RGB(3) MST9883C...
  • Page 29 5. TV Tuner TV Tuner is LG INNOTEK Inc. TAEW-G351P. SAW Filter is not included to the tuner and internal booster is included to the tuner. The tuner adopts external 2 Antenna Connectors. One is for input TV signal and the other is output TV signal. TV tuner is controlled by VCT4973 through IIC interface.
  • Page 30 - 30 -...
  • Page 31 - 31 -...

  • Page 32: Exploded View

    4814TKK291B SHIELD, INVERTER CAP(BOTTOM) 6910C00027A BATTERY,LITHIUM, LG-WTB01-02 SUNGNAM ELECTRONIC CO. 11.1V 4400mAh 3S2P, UL, LG-WTB01-02 4810TKK278A BRACKET, 15LW10 HOLDER POWER PCB 6718M000006 LANCARD, MINI PCI, LWMM-3001B LG IT INTERFACE STANDARD IEEE802, 11G 54M RX FOR WIRELESS TV(AMERICA). - 32 -...
  • Page 33 - 33 -...

  • Page 34: Exploded View Parts List

    EXPLODED VIEW PARTS LIST PART NO. DESCRIPTION 3313T15103A MAIN TOTAL ASSEMBLY, 15LW1R-UA BRAND ML-042A 3551TKK545A COVER ASSEMBLY, 15LW10 TOTAL . TOP ASSY(TX) 4815TKK043A SHIELD ASSEMBLY, TOP MAIIN(15LW10) 6871TMT787B PWB(PCB) ASSEMBLY,MAIN, 15LW10 TX BRAND ML- 042A TOTAL 4814TKK290A SHIELD, REAR .

  • Page 35: Replacement Parts List

    REPLACEMENT PARTS LIST For Capacitor & Resistors, the CC, CX, CK, CN, CH : Ceramic RD : Carbon Film charactors at 2nd and 3rd digit in the CQ : Polyestor RS : Metal Oxide Film P/No. means as follows; CE : Electrolytic RN : Metal Film CF : Fixed Film RH : CHIP, Metal Glazed(Chip)
  • Page 36 DATE: 2005. 01. 10. DATE: 2005. 01. 10. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION CB505 0CK103CK51A 0.01UF 1608 50V 10% R/TP B(Y CB807 0CK104CK56A 0.1UF 1608 50V 10% R/TP X7R CB506 0CK103CK51A 0.01UF 1608 50V 10% R/TP B(Y...
  • Page 37 DATE: 2005. 01. 10. DATE: 2005. 01. 10. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION CB718 0CK104CK56A 0.1UF 1608 50V 10% R/TP X7R CB902 0CK104CK56A 0.1UF 1608 50V 10% R/TP X7R CB719 0CK104CK56A 0.1UF 1608 50V 10% R/TP X7R...
  • Page 38 DATE: 2005. 01. 10. DATE: 2005. 01. 10. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION CB1203 0CC100CK41A 10PF 1608 50V 5% R/TP NP0 CP1009 0CE107WJ6DC 100UF MVK 35V 20% R/TP(SMD) CB1204 0CC100CK41A 10PF 1608 50V 5% R/TP NP0 CP1010 0CE226WJ6DC 22UF MVK 35V 20% R/TP(SMD) S...
  • Page 39 DATE: 2005. 01. 10. DATE: 2005. 01. 10. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION D1004 0DRDI00118A "B130LB-(F),LF DIODES R/TP SM" U1414 0DS226009AA KDS226 TP KEC SOT-23 80V 30 U1401 0IKE702900G KIA7029AF SOT-89 TP 2.9V VOL...
  • Page 40 DATE: 2005. 01. 10. DATE: 2005. 01. 10. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION L102 6210TCE001G HH-1M3216-501 CERATEC 3216MM FB602 6210TCE0013 - CERATEC R/TP HB1M1608-121J L1102 6210TCE001G HH-1M3216-501 CERATEC 3216MM FB603 6210TCE0013 - CERATEC R/TP HB1M1608-121J...
  • Page 41 DATE: 2005. 01. 10. DATE: 2005. 01. 10. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION RA208 0RHZTCZ001D RCA86TRJ22R0 SMART 22OHM 1/1 R305 0RJ0222D677 22 OHM 1/10 W 5% 1608 R/TP RA402 0RHZTCZ001F RCA SMART 4.7KOHM 1/16 W 5%...
  • Page 42 DATE: 2005. 01. 10. DATE: 2005. 01. 10. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION RD607 0RJ0000D677 0 OHM 1/10 W 5% 1608 R/TP R1012 0RJ2002D677 20000 OHM 1/10 W 5% 1608 R/T RD608 0RJ0000D677 0 OHM 1/10 W 5% 1608 R/TP...
  • Page 43 DATE: 2005. 01. 10. DATE: 2005. 01. 10. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R1414 0RJ0000D677 0 OHM 1/10 W 5% 1608 R/TP R903 0RH0000D622 0 OHM 1 / 10 W 2012 5.00% D R1421 0RJ0000D677 0 OHM 1/10 W 5% 1608 R/TP...
  • Page 44 DATE: 2005. 01. 10. DATE: 2005. 01. 10. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R1224 0RJ1005D677 10M OHM 1/10 W 5% 1608 R/TP RD502 0RJ1000D477 100 OHM 1/10 W 1% 1608 R/TP R1301 0RJ1001D677 1K OHM 1/10 W 5% 1608 R/TP...
  • Page 45 DATE: 2005. 01. 10. DATE: 2005. 01. 10. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION OTHERs CB310 0CK105CD56A 1UF 1608 10V 10% R/TP X7R X1402 6202TST001C "SX-1, SUNNY SMD, 6.0MHZ ,50P" C302 0CC221CK41A 220PF 1608 50V 5% R/TP NP0...
  • Page 46 DATE: 2005. 01. 10. DATE: 2005. 01. 10. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION Q301 0TFDI80001A 2N7002 DIODES R/TP SOT23 60V R332 0RJ0102D677 10 OHM 1/10 W 5% 1608 R/TP Q305 0TFDI80001A 2N7002 DIODES R/TP SOT23 60V...
  • Page 47 DATE: 2005. 01. 10. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R201 0RJ3300D677 330 OHM 1/10 W 5% 1608 R/TP R202 0RJ1001D677 1K OHM 1/10 W 5% 1608 R/TP R203 0RJ1001D677 1K OHM 1/10 W 5% 1608 R/TP R205 0RJ1500D677 150 OHM 1/10 W 5% 1608 R/TP...
  • Page 48 VCC5.0V VCC5.0V C1904 FB1903 TP1931 D1901 0.1uF TP1933 L1902 BAT54C FB120OHM 1uH/6.4A VCC3.3V CP1906 22uF/35V/F55 RU1902 VCC5.0V VCC3.3V VCC3.3V TP1934 U1904 VCC1.8V VCC5.0V VCC2.5V VCC5.0V Q1905 RU2001 L1901 FB1902 SHORT4 U1903 MIC39300-2.5BU C1905 BOOT RU1904 2.2uF/2012 R1909 3.3uH/4.1A FB120OHM VCC5.0V PWGD ISEN VOUT...
  • Page 49 U1505 PB_AD15 PF_D15 15-2D 7-4C 15-6A PB_AD14 PF_D14 15-2D 7-4C 15-6A PB_AD13 PF_D13 15-2D 7-4C 15-6A PB_AD12 PF_D12 15-2D 7-4C 15-6A PB_AD11 PF_D11 U1502 15-2D 7-4C 15-6A PB_AD10 PF_D10 PF_A20 PF_D15 15-2D 7-4C 15-6A 20-6C 15-3B A-1_DQ15 15-3A PB_AD9 PF_D9 PF_A19 PF_D14 15-2D...
  • Page 50 U1002 U1001 RA1008 22X4 DRAM0_D15 RA1004 22X4 DRAM0_D31 NC7_A13 DQ15 3-3C NC7_A13 DQ15 3-3B DRAM0_A12 RA1008 22X4 DRAM0_D14 DRAM0_A12 RA1004 22X4 DRAM0_D30 10-5A 3-5B NC8_A12 DQ14 3-3C 10-1A 3-5B NC8_A12 DQ14 3-3B DRAM0_A11 RA1008 22X4 DRAM0_D13 DRAM0_A11 RA1004 22X4 DRAM0_D29 10-5A 3-5B DQ13...
  • Page 51 VCC3.3V RU701 RU703 RU702 SF_DI TP1840 TP1940 U701 TP1839 TP1838 SF_DO TP1862 SF_CSB SF_CLK *SF_HOLD VCC3.3V *HOLD *SF_WP SST25VF512-20-4C-SA RD702 RD701 RD703 CB701 0.1uF 10K/NC U201 U201 TP602 TP1860 AA15 SI_CLK FB601 FB120OHM SO0_CLK SF_DI NO_CONNECTION SI_CLK SO0_CLK 13-1B TP601 TP1861 AB15 SI_LRCLK...
  • Page 52 VDD0 VCC8.0V nRESET VSS1 VDD1 R102 3-5C 9-6D 14-1E 14-2A VSS2 VDD2 TQ207 VCC3.3V R101 nRESET_OUT DESIGN CUSTOMER LG Electronics Inc. DESIGN CUSTOMER LG Electronics Inc. 14-2B 1-3E 3-5C VCC8.0V_VCT RA101 4.7Kx4 VSSQ0 VDDQ0 RA101 4.7Kx4 RA101 4.7Kx4 CHECK-1 MODEL_NAME REV.
  • Page 53 10K/NC 7-6B 6-6D VIDIN1 TQ57 7-6B 6-6D VIDIN0 RU401 7-6B 6-6C TQ145 RD401 10K/NC DESIGN CUSTOMER DESIGN CUSTOMER LG Electronics Inc. LG Electronics Inc. CHECK-1 MODEL_NAME REV. CHECK-1 MODEL_NAME REV. RU10 WTV-TX-PILOT-VERIFY WTV-TX-PILOT-VERIFY 135M CHECK-2 162M CHECK-2 189M DATE UPDATE...
  • Page 54 X6966D 100pF/NC 14-3B LRCK 4-6D U801 PCM1802 C813 EZ_LINK R803 0/NC TQ36 VCC3.3V 8-4B DESIGN CUSTOMER DESIGN CUSTOMER LG Electronics Inc. 0.01uF LG Electronics Inc. EZ_RX R802 0/NC TQ103 8-4D 6-3D R711 TQ35 EZ_TX CHECK-1 MODEL_NAME REV. 6-3E CHECK-1 MODEL_NAME REV.
  • Page 55 10K/NC R1117 R1119 TQ112 VCC3.3V PWR_ON Q1106 11-7B 11-4B 6-3E C3875 14-6D 14-5B 14-4D J1101 DESIGN CUSTOMER DESIGN CUSTOMER LG Electronics Inc. LG Electronics Inc. CHECK-1 MODEL_NAME REV. CHECK-1 MODEL_NAME REV. WTV-TX-PILOT-VERIFY WTV-TX-PILOT-VERIFY CHECK-2 CHECK-2 SMW200-04 DATE UPDATE SHEET DATE...
  • Page 56 VCCINV VCC5.0V VCC5.0V VCC3.3VSB SSVCC PWRINFET J302 TP83 CP309 CB313 RU301 RU302 RU201 R202 220uF/35V/J10 0.1uF/2012 4.7K/NC 4.7K/NC POWER PWRINFET CP308 CP307 CB312 CB311 D303 22uF/35V/F55 22uF/35V/F55 10uF/3225 10uF/3225 SMAJ16A R230 30K/1% R206 TP59 R318 FB301 100K TE215 INVON TP58 XREF TP53 0.03/6432...
  • Page 57 Jan., 2005 P/NO : 3828TSL106B Printed in Korea...

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