37lh55 schematic

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LCD TV SCHEMATICSCHASSIS : LA92B

MODEL : 37LH55CAUTION

37LH55-UA

BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

EXPLODED VIEWIMPORTANT SAFETY NOTICEMany electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by in the Schematic Diagram and EXPLODED VIEW. 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. Do not modify the original design without permission of manufacturer.

400

520

540

530

550

803

810

802

801

804

900

800

200

120

122

510

121

500

310

LV1

LV2

Copyright LG Electronics. Inc. All right reserved. Only for training and service purposes

300

- 34 -

LGE Internal Use Only

A2

A10

37LH55 EXPLODED VIEW PARTS LIST

37LH55 EXPLODED VIEW PARTS LISTITEM n/a 120 121 200 200 300 310 400 500 510 520 530 540 550 802 803 804 810 900 A10 A2 LV1 LV2 PART No EAY60701701 EAB58304303 EAB58536001 EAJ60546001 EAT60664401 ABJ72910410 MBG56800201 ACQ69083724 EBR59216901 EBR61125001 ABA69568702 EAY58582901 EBR61832001 EAM60352204 MJH55846602 MJH55846702 MJH55846802 MJH56736703 AAN67805609 FAB30016431 MKJ42519621 EAD60679328 EAD60679411 Ballast (Inverter) Speaker Woofer (Full Range) 10W 8OHM 81DB 130HZ 130X50 Speaker Tweeter (High Range) 15W 6OHM 0DB 0HZ 45X22X20 TFT Panel (Includes T-CON board) T-CON board (PWB Assembly) Cabinet Assembly Ft Frame Button,Control Back Cover Ambient Light Sensor, IR, LED Control Key board Bracket Assembly Power Supply board (PWB Assembly) Main board (PWB Assembly) AC Line Filter Supporter Supporter Supporter Supporter Stand Stand Screw (D 4.0 L 24.0) Remote Control Transmitter LVDS Cable (Left CN1 to P702) LVDS Cable (Right CN2 to P701) DESCRIPTION

CVBS COMPONENT2

OPT OPT

TV/MNT

10K R282 Except_CL40

R28010K

10K R281

10K R283

R284

0 OPT R285

0 OPT R286 0CL40 R287

0 OPT

OPT

3

A0 A1 A2

1 2 3

8 VCC 7

Addr:10101-R2221 4.7K R181 001:H6;001:AB28;001:AO6 EEPROM_SCL

1

4

2

001:AR30

R105 4.7K

L110

Flash_WP_1

+3.3V R103 10K 001:AR36 0 R101 OPT B 0 R102 Q100 KRC103S

0.1uF C126

1K

3.9K

R156

R158

1K

0.1uF

OPT

C131

R157

R197 4.7K OPT

R154 1K

NC_9 NC_10 CLE

14 15 16 17 18 19 20 21 22 23 24

35 34 33 32 31 30 29 28 27 26 25

NC_22 NC_21 NC_20 I/O3 I/O2 I/O1 I/O0 NC_19 NC_18 NC_17 NC_16

R2106 4.7K OPT

L104

R2107 1.2K

R2108 1.2K

R2109 1.2K

R2110 1.2K

R260 3.3K

R153

IC104 AT24C512BW-SH-T0 R2127 A0 0 R2125 A1 0 R2126 A2GND VCC

R266 3.3K

10K

OPT

3

6

SCL

0 Q101 KRC103S OPT

R155 1K

Copyright C 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only

+1.26V_VDDC

+3.3V_VDDP

+3.3VL101 BLM18PG121SN1D

IC100 MSD3159GV

C163 330uF 4V

C166 0.1uF

C169 0.1uF

C172 0.1uF

C175 0.1uF

C178 0.1uF

C183 0.1uF

C188 0.1uF

C193 0.1uF

C198 0.1uF

C2104 0.1uF

C2109 0.1uF

C2115 0.1uF

C2119 0.1uF

C2137 0.1uF

C2120 0.1uF

C2123 0.1uF

C2124 0.1uF

C2125 0.1uF

C2126 0.1uF

C2127 0.1uF

C2128 0.1uF

C2129 0.1uF

C2130 0.1uF

C2131 0.1uF

C2132 0.1uF

C2133 0.1uF

C2134 0.1uF

C2135 10uF

C164 0.1uF

C167 0.1uF

C170 0.1uF

C173 0.1uF

C176 0.1uF

C179 0.1uF

C184 0.1uF

C189 0.1uF

C195 0.1uF

C196 0.1uF

+1.8V_DDRF1 RXACKP F2 RXACKN G2 RXA0P G3 RXA0N H3 RXA1P G1 RXA1N H1 RXA2P H2 RXA2N A1 DDCD_A_DA B2 DDCD_A_CK A2 HOTPLUG_A C3 RXBCKP B1 RXBCKN C1 RXB0P C2 RXB0N D2 RXB1P D3 RXB1N E3 RXB2P D1 RXB2N E1 DDCD_B_DA F3 DDCD_B_CK E2 HOTPLUG_B 005:AB20 005:AB20 005:AC20 005:AB20 005:AC20 005:AC20 005:AD20 005:AD20 005:AA20 005:AA20 005:R27 R142 R143 R144 HDMI_CEC R145 0 0 100 100 AE8 AD8 AD9 AF8 AF9 RXCCKP RXCCKN RXC0P RXC0N RXC1P AA3 Y1 AE1 AF3 AE3 AE2 AA1 AB1 AB2 AC2 AB3 AC3 C134 C135 C136 C137 C138 C139 C140 C141 C142 C143 C144 C145 2.2uF 2.2uF 2.2uF 2.2uF 2.2uF 2.2uF 2.2uF 2.2uF 2.2uF 2.2uF 2.2uF 2.2uF 5V_HDMI_4 W3 W2 C146 C147 0.1uF 0.1uF R171 R172 47 47 010:N21 R2220 0 010:N20 AR103 /PF_CE0 /PF_CE1 SPDIF_IN HSYNC1/DSUB_HSYNC SPDIF_OUT F11 E9 OPTR269 R159 22 100 006:D6 SPDIF_OUT /PF_OE /PF_WE PF_ALE PF_WP /F_RB EEPROM_SCL EEPROM_SDA SDA0 SCL0 I S P D e b u g p o r t f o r S 5ISP_RXD C156 0.01uF OPT C158 0.01uF C159 0.01uF C160 0.01uF R173 22K R174 22K R175 22K R176 22K OPT OPT R177 22K OPT OPT OPT OPT OPT OPT OPT ISP_TXD DBG_RX DBG_TX 006:K18 006:K13 006:K13 006:K13 C152 22pF OPT +3.3V VCLAMP REFP REFM REXT K4 H4 J4 G4 R152 1% FE_VMAIN VCOMO 010:N16 010:I14 0 R229 R2122 100 Y2 AA2 CVBSOUT0/SC2_MNTOUT CVBSOUT1 R139 R117 100 100 C122 C123 0.047uF 0.047uF W1 Y3 CVBS0/RF_CVBS VCOM0 AUCOM AUVRM AUVRP AUVAG AE5 AE4 AF4 AD4 C129 C130 C132 C133 10uF 10V 0.1uF 1uF 4.7uF +3.3V_ST SB_MUTE -----------------------------HIGH LOW D6 LCD PDP D7 FRC Non-FRC E11 Movin LED Blinkin LED B9 FullHD WXGA -----------------------------POWER_DET R274 OPT C128 0.1uF 390 C127 0.1uF C148 0.1uF C149 0.1uF TS1_D0 PWM0 PWM1 PWM2 001:N11;001:AL12 001:N10;001:AL12 001:N10;001:AL12 AB13 AB12 AD12 AA13 004:B27 004:B27 0 0 A4 B4 F4 E4 C4 TS1_SYNC PWM0 PWM1 PWM2 PWM3 SAR0 SAR1 SAR2 SAR3 IRIN ET_TXD0 ET_TXD1 ET_TX_CLK ET_RXD0 ET_RXD1 ET_TX_EN ET_MDC ET_MDIO 0 100 100 100 100 100 100 100 100 OPT 22 OPT AC11 D9 D10 D7 E11 E8 E10 D6 D5 C5 ET_COL GPIO44 GPIO96 GPIO88 GPIO90/I2S_OUT_MUTE GPIO91 GPIO97 GPIO98 GPIO99 GPIO103/I2S_OUT_SD3 GPIO102 E16 E17 E18 F7 L9 L10 L11 GND_2 GND_3 GND_4 GND_5 GND_6 GND_7 GND_8 VDDC_1 VDDC_2 VDDC_3 VDDC_4 VDDC_5 VDDC_6 VDDC_7 VDDC_8 POWER_ON_DELAY C +5V +5V_ST+3.3V_ST IC103 MAX810RTR VCC 3 1 GND R228 100 R182 22 EEPROM_SDA 001:H5;001:AB28;001:AO6 C R230 10K E C212 4.7uF 10V R247 10K S5/S6_Reset C213 10uF 6.3V B Q106 2SC3052 GPIO67 GPIO68 A7 B8 2 RESET +3.3V_ST M10 M11 M12 M13 M14 M15 M16 R224 R242 OPT 100 100 USB_CTL 004:AM28 M17 M18 N4 N9 N10 N11 N12 N13 N14 R236 100 GND_17 GND_18 GND_19 GND_20 GND_21 GND_22 GND_23 GND_24 GND_25 GND_26 GND_27 GND_28 GND_29 GND_30 GND_31 GND_32 GND_33 GND_34 GND_35 GND_36 GND_37 GND_38 GND_39 AVDD_DDR_1 AVDD_DDR_2 P11 P12 P13 P14 P15 PCM_A[7] PCM_A[6] PCM_A[5] R4 I/O4 NC_24 NC_23 PRE VCC_2 VSS_2 C162 0.1uF +5V_GENERAL +3.3V R16 R17 R18 T5 T9 T10 T11 T12 T13 R198 R199 0 0 R2100 R2101 0 0 OPT R2113 OPT R2114 005:AH5 005:AI5 006:K12;004:K27 006:K12;004:K27 TDA9996_SDA TDA9996_SCL SDA_SUB/AMP SCL_SUB/AMP R2102 R2103 R2104 R2105 0 0 0 0 SDA1 SCL1 0 0 HW IIC EEPROM_SDA EEPROM_SCL T14 SDA0 SCL0 001:AB28;001:AO7 001:AB28;001:AO6 T15 T16 T17 T18 U5 001:H5;001:O16;001:AB28 001:H6;001:O16;001:AB28 W13 Y21 AA23 C161 10uF6.3V PCM_A[4] R9 R10 R11 R12 R13 R14 R15 GND_48 GND_49 GND_50 GND_51 GND_52 GND_53 GND_54 GND_55 GND_56 GND_57 GND_58 GND_59 GND_60 GND_61 GND_62 GND_63 AVDD_33_1 GND_64 GND_65 GND_66 GND_67 GND_68 GND_69 GND_70 GND_71 GND_72 GND_73 AVDD_USB H8 AVDD_DM W8 +3.3V L102 BLM18PG121SN1D C192 C208 0.1uF L107 AVDD_33_2 AVDD_33_3 AVDD_33_4 AVDD_33_5 J7 K7 L7 M7 N7 +3.3V C204 C205 C202 C203 C207 C214 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF AVDD_MPLL AVDD_LPLL R20 +3.3V_AVDD_MPLL H7 C191 C201 10uF 10V +3.3V L108 BLM18PG121SN1D C211 0.1uF AVDD_MEMPLL_1 AVDD_MEMPLL_2 AVDD_MEMPLL_3 H17 T20 V20 C200 C206 P16 P17 I/O6 I/O5 P18 AVDD_DDR_3 GND_40 GND_41 GND_42 GND_43 GND_44 GND_45 GND_46 GND_47 AVDD_DDR_4 AVDD_DDR_5 AVDD_DDR_6 AVDD_DDR_7 AVDD_DDR_8 AVDD_DDR_9 AVDD_DDR_10 AVDD_DDR_11 G12 G13 H13 H14 H15 H16 W14 W15 W16 W17 W18 AVDD_AU W7 +1.8V_DDR C215 0.1uF C219 0.1uF VDDP_1 VDDP_2 VDDP_3 VDDP_4 VDDP_5 VDDP_6 VDDP_7 VDDP_8 H9 H10 H11 H12 N20 P20 W9 W10 R188 4.7K EIC105 CAT24WC08W-T

LVA0P LVA0M LVA1P LVA1M LVA2P LVA2M LVA3P LVA3M LVA4P LVA4M LVACKP LVACKM LVB0P LVB0M LVB1P LVB1M LVB2P LVB2M LVB3P LVB3M LVB4P LVB4M LVBCKP LVBCKM

AE16 AD16 AD15 AF16 AF15 AE15 AD13 AF14 AF13 AE13 AE14 AD14 AE20 AD20 AD19 AF20 AF19 AE19 AD17 AF18 AF17 AE17 AE18 AD18

008:L28 008:L28 008:K28 008:K28 008:K28 008:K28 008:J28 008:J28 008:J28 008:J28 008:J28 008:K28 008:N28 008:O28 008:N28 008:N28 008:N28 008:N28 008:M28 008:M28 008:L28 008:M28 008:M28 008:M28

MEMC_RXE0+ MEMC_RXE0MEMC_RXE1+ MEMC_RXE1MEMC_RXE2+ MEMC_RXE2MEMC_RXE3+ MEMC_RXE3MEMC_RXE4+ MEMC_RXE4MEMC_RXEC+ MEMC_RXECMEMC_RXO0+ MEMC_RXO0MEMC_RXO1+ MEMC_RXO1MEMC_RXO2+ MEMC_RXO2MEMC_RXO3+ MEMC_RXO3MEMC_RXO4+ MEMC_RXO4MEMC_RXOC+ MEMC_RXOCPCM_A[0] PCM_A[1] PCM_A[2] PCM_A[3] PCM_A[4] PCM_A[5] PCM_A[6] PCM_A[7] OPT 33 R2172 OPT 33 R2123 OPT 33 R2124 R178 OPT 33 AB16 AC15 AC14 AB14 AC12 AB8 AC13 AA9 AB5 AA4 V4 Y4 AB9 AA7 AD6 AA14 AB18 Y5 AB15 AA10 AC8 AC7 AA5 W4 T4 AE6 AF6 AR102 22 AA12 AA11 AC9 Y14 22 R215 R216 R217 R218 R191 R192 R183 R184 0 0 0 0 22 22 22 22 AB11 F8 D11 AB21 AC21 J1 J2 W5 V5 PCM_A[0-7] D4 AC16 AA15 AA16 AC6 Y10 Y11 Y12 Y13 HWRESET XIN XOUT PCMD0/CI_D0 PCMD1/CI_D1 PCMD2/CI_D2 PCMD3/CI_D3 PCMD4/CI_D4 PCMD5/CI_D5 PCMD6/CI_D6 PCMD7/CI_D7 PCM_A0/CI_A0 PCM_A1/CI_A1 PCM_A2/CI_A2 PCM_A3/CI_A3 PCM_A4/CI_A4 PCM_A5/CI_A5 PCM_A6/CI_A6 PCM_A7/CI_A7 PCM_A8/CI_A8 PCM_A9/CI_A9 PCM_A10/CI_A10 PCM_A11/CI_A11 R253 PCM_A12/CI_A12 PCM_A13/CI_A13