LG 55G2 Service Manual Download Page 76

Page: 76 / 122

10. Trouble shooting - No audio (Analog TV audio)

Check TU_SIF path
Including Q6500 TR buffer to LG1152A(IC101)

Check SIF Signal
TU6504 6Pin

Bad Tuner. Replace Tuner.

Follow procedure
‘8. All source audio’

trouble shooting guide.

Replace TR

Check RF Cable & Signal

Check Tuner 1.8V Power
L6500

Check

IC6503

Check Tuner 3.3V Power
L6503

Replace L6503

Replace IC6503

Replace L6500

LGE Internal Use Only

Summary of Contents for 55G2

Page 1: ... MODEL 55G2 55G2 UG CAUTION BEFORE SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL LED LCD TV SERVICE MANUAL North Latin America http aic lgservice com Europe Africa http eic lgservice com Asia Oceania http biz lgservice com Internal Use Only ...

Page 2: ...ht LG Electronics Inc All rights reserved Only for training and service purposes CONTENTS CONTENTS 2 PRODUCT SAFETY 3 SPECIFICATION 4 ADJUSTMENT INSTRUCTION 10 SCREW ASSEMBLY WORKING GUIDE 19 EXPLODED VIEW 20 SCHEMATIC CIRCUIT DIAGRAM ...

Page 3: ...inals etc to be sure the set is safe to operate without damage of electrical shock Leakage Current Cold Check Antenna Cold Check With the instrument AC plug removed from AC source connect an electrical jumper across the two AC plug prongs Place the AC switch in the on position connect one lead of ohm meter to the AC plug prongs tied together and touch other ohm meter lead in turn to each exposed m...

Page 4: ... 5 The receiver must be operated for about 5 minutes prior to the adjustment 3 Test method 1 Performance LGE TV test method followed 2 Demanded other specification Safety UL CSA CE IEC specification EMC FCC ICES CE IEC specification Wireless WirelessHD Specification Option 4 General Specification No Item Specification Remark 1 Market 1 North America 2 Broadcasting System 1 ATSC NTSC 3 Receiving Sy...

Page 5: ... HDTV 720P 7 1920 1080 33 75 60 00 74 25 HDTV 1080I 8 1920 1080 33 72 59 94 74 176 HDTV 1080I 9 1920 1080 67 50 60 00 148 50 HDTV 1080P 10 1920 1080 67 432 59 94 148 352 HDTV 1080P 11 1920 1080 27 00 24 00 74 25 HDTV 1080P 12 1920 1080 26 97 23 94 74 176 HDTV 1080P 13 1920 1080 33 75 30 00 74 25 HDTV 1080P 14 1920 1080 33 71 29 97 74 176 HDTV 1080P No Resolution H freq kHz V freq kHz Pixel clock P...

Page 6: ...12 60 015 85 50 VESA WXGA O 7 1280 1024 63 981 60 020 108 00 VESA SXGA O 8 1920 1080 67 5 60 148 5 HDTV 1080P O HDMI DTV 1 720 480 31 50 60 00 27 027 SDTV 480P 2 720 480 31 47 59 94 27 00 SDTV 480P 3 1280 720 45 00 60 00 74 25 HDTV 720P 4 1280 720 44 96 59 94 74 176 HDTV 720P 5 1920 1080 33 75 60 00 74 25 HDTV 1080I 6 1920 1080 33 72 59 94 74 176 HDTV 1080I 7 1920 1080 67 50 60 00 148 50 HDTV 1080...

Page 7: ... 3D supported mode manually 5 2 2 USB Input No Resolution H freq kHz V freq Hz Pixel clock MHz Proposed Remark 1 1920 1080 33 75 30 00 74 25 HDTV 1080p Side by Side Top Bottom Checkerboard 5 2 3 HDMI PC Input Input No Resolution H freq kHz V freq Hz Pixel clock MHz Remark 1 1024 768 48 363 60 004 65 000 Side by Side Top Bottom 2 1280 768 47 776 59 870 79 500 Side by Side Top Bottom 3 1360 768 47 7...

Page 8: ... 94 60 00 27 00 27 027 Secondary 16 9 Top Bottom 17 720 480p 31 469 31 50 59 94 60 00 27 00 27 027 Secondary 16 9 Side by Side Half 18 720 480p 62 938 63 00 59 94 60 00 54 00 54 054 Secondary 4 3 Frame Packing 19 720 480p 31 469 31 50 59 94 60 00 27 00 27 027 Secondary 4 3 Top Bottom 20 720 480p 31 469 31 50 59 94 60 00 27 00 27 027 Secondary 4 3 Side by Side Half 21 640 480p 62 938 63 00 59 94 60...

Page 9: ...720 44 96 59 94 74 176 HDTV 720P Side by Side Top Bottom 2 1920 1080 33 75 60 00 74 25 HDTV 1080I Side by Side Top Bottom 3 1920 1080 33 72 59 94 74 176 HDTV 1080I Side by Side Top Bottom 4 1920 1080 67 500 60 148 50 HDTV 1080P Side by Side Top Bottom 5 1920 1080 67 432 59 94 148 352 HDTV 1080P Side by Side Top Bottom 6 1920 1080 27 000 24 000 74 25 HDTV 1080P Side by Side Top Bottom 7 1920 1080 2...

Page 10: ...nt items 3 1 Final assembly adjustment EDID DDC check White Balance adjustment ADC Adjustment check RS 232C functionality check Factory Option setting per destination Ship out mode setting In Stop 3 2 Etc Ship out mode Tool option menu USB Download S W Update Option Service only 3 3 Automatic Adjustment 3 3 1 Overview ADC adjustment is needed to find the optimum black level and gain in Analog to D...

Page 11: ...Baudrate 4 1 3 Download process 1 Select the download items 2 Mode check Online Only 3 Check the test process US Canada models DETECT MAC_WRITE WIDEVINE_WRITE Korea Mexico models DETECT MAC_WRITE WIDEVINE_WRITE 4 Play START 5 Check of result Ready Test OK or NG 6 Printer out MAC Address Label 4 1 4 Communication Port connection 1 Connect PCBA Jig RS 232C Port PC RS 232C Port 4 1 5 Download 1 US Ca...

Page 12: ...gh information sharing without any necessity of user input It is a realization of Plug and Play 4 3 2 Equipment Since embedded EDID data is used EDID download JIG HDMI cable and D sub cable are not need Adjust remocon 4 3 3 Download method 1 Press Adj key on the Adj R C 2 Select EDID D L menu 3 By pressing Enter key EDID download will begin 4 If Download is successful OK is display but If Download...

Page 13: ...E F1 48 90 22 20 05 04 03 02 01 23 09 57 10 07 78 03 0C 00 30 00 B8 2D 20 C0 0E 01 4F 00 FE 20 08 10 06 10 18 10 28 10 38 10 E3 05 03 01 02 3A 30 80 18 71 38 2D 40 58 2C 45 00 A0 5A 00 00 00 1E 40 01 1D 80 18 71 1C 16 20 58 2C 25 00 A0 5A 00 00 50 00 9E 01 1D 00 72 51 D0 1E 20 6E 28 55 00 A0 5A 60 00 00 00 1E 26 36 80 A0 70 38 1F 40 30 20 25 00 70 A0 5A 00 00 00 1A 00 00 00 00 00 00 00 00 00 10 HD...

Page 14: ...ONLY key or POWER ON key 2 Place optical probe on the center of the display It need to check probe condition of zero calibration before adjustment 3 Connect RS 232C Cable 4 Select mode in ADJ Program and begin a adjustment 5 When WB adjustment is completed with OK message check adjustment status of pre set mode Cool Medium Warm 6 Remove probe and RS 232C cable W B Adj must begin as start command w...

Page 15: ... 284 293 304 314 330 6 36 49 274 279 290 299 311 325 7 50 79 271 277 287 297 308 323 8 80 149 270 274 286 294 307 320 9 Over 150 269 273 285 293 306 319 4 5 Option selection per country 4 5 1 Overview 1 Press ADJ key on the Adj R C and then select Country Group Menu 2 Depending on destination select KR or US then on the lower Country option select US CA MX Selection is done using KEY 4 6 Tool Opti...

Page 16: ...tment remote controller Step 3 Cover Eye Q sensor on the front of set with your hands hold it for 6 seconds Step 4 Check the Sensor Data on the screen make certain that Data is below 10 If Data isn t below 10 in 6 seconds Eye Q sensor would be bad You should change Eye Q sensor Step 5 Uncover your hands from Eye Q sensor hold it for 6 seconds Step 6 Check Back Light xxx on the screen check data in...

Page 17: ...ally detected 3 Show the message Copying files from memory 5 Updating Completed The TV will restart automatically 6 If your TV is turned on check your updated version and Tool option If downloading version is more high than your TV have TV can lost all channel data In this case you have to channel recover If all channel data is cleared you didn t have a DTV ATV test on production line After downlo...

Page 18: ...GB Success is displayed If ADC calibration is failure ADC RGB Fail is displayed 12 If ADC calibration is failure after recheck ADC pattern or condition retry calibration 12 2 Manual White balance Adjustment 12 2 1 Adj condition and cautionary items 1 Lighting condition in surrounding area surrounding lighting should be lower 10 lux Try to isolate adj area into dark surrounding 2 Probe location Col...

Page 19: ...4EA D D D D D D D D D D D D Screw specification and application situation C C A A A A A A A A A A A A A A A A A A A A B B C C C C C C C C C C C C C C FAB30078812 M6 L10 BK Machine 4EA B B B B B B A A A A A C Warning Check Screw Type When Screw is assembled at Part If Screw is used at the part Module will get damaged A A C Warning Check Screw Type When Screw is assembled at Part If Screw is used at...

Page 20: ...e 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 IMPORTANT SAFETY NOTICE A7 A2 A10 AG1 900 300 200 400 540 521 530 800 810 910 120 Set Sta...

Page 21: ... C23 SD_CD_N GPIO75 A23 SD_WP_N GPIO74 B23 SD_DATA3 GPIO72 A24 SD_DATA2 GPIO87 B24 SD_DATA1 GPIO86 C24 SD_DATA0 GPIO85 A25 USB_DP1 B27 USB_DM1 A27 USB_DP2 A26 USB_DM2 B26 USB_TXR_RKL C25 USB_ANALOGTEST B25 BT_USB_DP AA1 BT_USB_DM AA2 BT_TXR_RKL AA4 BT_ANALOGTEST Y4 EMMC_RST E28 EMMC_CLK F27 EMMC_CMD F26 EMMC_DATA7 C26 EMMC_DATA6 E27 EMMC_DATA5 E26 EMMC_DATA4 D27 EMMC_DATA3 D28 EMMC_DATA2 C27 EMMC_...

Page 22: ...AL H22 SP_VQPS AA19 GND_MAIN_XTAL G23 GND_1 G7 GND_2 H7 GND_3 H12 GND_4 H15 GND_5 J7 GND_6 J8 GND_7 J9 GND_8 J10 GND_9 J11 GND_10 J12 GND_11 J13 GND_12 J14 GND_13 J15 GND_14 J16 GND_15 J17 GND_16 J18 GND_17 J19 GND_18 J20 GND_19 K7 GND_20 K12 GND_21 K13 GND_22 K14 GND_23 K15 GND_24 K16 GND_25 K17 GND_26 K18 GND_27 K19 GND_28 K20 GND_29 L7 GND_30 L12 GND_31 L13 GND_32 L14 GND_33 L15 GND_34 L16 GND_...

Page 23: ...7 AUAD_REFN T4 AUAD_REFP U4 AUAD_VR_OUT V5 AUMI_BIAS R7 AUMI_IN R5 AUMI_COM R6 DDCD0_DA E18 DDCD0_CK E17 HPD0 E16 PHY0_RXCN_0 J18 PHY0_RXCP_0 J17 PHY0_RX0N_0 H17 PHY0_RX0P_0 H18 PHY0_RX1N_0 G17 PHY0_RX1P_0 G18 PHY0_RX2N_0 G16 PHY0_RX2P_0 F16 PHY0_ARC_OUT_0 F17 ANTCON P12 RFAGC M18 IFAGC P18 ADC_I_INCOM T17 ADC_I_INP U18 ADC_I_INN T18 IC101 LG1152AN B2 INTR_GBB L1 INTR_HDMI1 L2 INTR_AFE3CH L3 AUD_H...

Page 24: ...R_DQ5 M2_DDR_A2 M2_DDR_DQ1 M2_DDR_CKE M2_DDR_A12 M2_DDR_DQ6 M2_DDR_A1 M2_DDR_DQ7 M2_DDR_A11 M2_DDR_DQ11 M2_DDR_DQ3 M2_DDR_DQ4 M2_DDR_DQ9 M2_DDR_A13 M2_DDR_DQ14 M2_DDR_BA0 M2_DDR_CLK M2_DDR_CLKN M2_DDR_RASN M2_DDR_DQSU_P M2_DDR_BA1 M2_DDR_DML M2_DDR_RESET_N M2_DDR_DMU M2_DDR_DQ13 M2_DDR_A5 M2_DDR_A9 M2_DDR_DQ2 M2_DDR_DQ10 M2_DDR_A10 M2_DDR_DQSL_P M2_DDR_DQSL_N M2_DDR_DQ8 M2_DDR_DQSU_N M2_DDR_ODT M2...

Page 25: ...6 DAT6 37 TS_OUT3 1 GND 24 ADDR5 55 TS_IN6 19 TS_IN_VAL 50 TS_IN3 44 IORD 14 ADDR14 8 ADDR10 39 TS_OUT5 3 DAT4 26 ADDR3 60 INPACK 27 ADDR2 61 REG 28 ADDR1 62 TS_OUT_VAL 29 ADDR0 63 TS_OUT_SYN 30 DAT0 64 TS_OUT0 31 DAT1 32 DAT2 33 IO_BIT 34 GND 65 TS_OUT1 66 TS_OUT2 67 CI_DET2 68 GND 69 CI_ADDR 8 R6224 22 CI CI_ADDR 14 R6204 10K OPT PCM_REG CI_TS_DATA 1 R6213 0 OPT R6210 0 OPT PCM_IOWR CI_ADDR 4 R6...

Page 26: ...L2303 BLM18SG121TN1D L2305 CIS21J121 C2334 100pF 50V C2328 0 1uF 50V 3 5V_ST C2325 0 1uF 16V C2338 100pF 50V ERROR_OUT 12V 3 3V_TU R2366 0 5 PD_ 3 5V R2377 100K 1 16W 5 C2335 0 1uF 50V OPT 12V C2375 180pF 50V R2315 100 1 C2329 0 01uF 50V 12V 5V_NORMAL C2333 22uF 10V R2346 2K 1 10uF C2324 10V C2342 2200pF 50V L2313 6 8uH NR8040T4R7N R2362 2 7K 1 PD_ 12V R2363 1 2K 1 PD_ 12V R2364 8 2K 1 PD_24V R236...

Page 27: ...TP4 6 P75 KR5 INTP9 SCK01 SCL01 7 P74 KR4 INTP8 SI01 SDA01 8 P73 KR3 SO01 9 P72 KR2 SO21 10 P71 KR1 SI21 SDA21 11 P70 KR0 SCK21 SCL21 12 P30 INTP3 RTC1HZ SCK11 SCL11 13 P50 INTP1 SI11 SDA11 14 P51 INTP2 SO11 15 P17 TI02 TO02 16 P16 TI01 TO01 INTP5 17 P15 PCLBUZ1 SCK20 SCL20 18 P14 RXD2 SI20 SDA20 19 P13 TXD2 SO20 20 P12 SO00 TXD0 TOOLTXD 21 P11 SI00 RXD0 TOOLRXD SDA00 22 P10 SCK00 SCL00 23 P146 24...

Page 28: ...3200 10uF 10V 3 3V_NORMAL L3200 BLM18PG121SN1D C3206 0 1uF 16V C3207 0 1uF 16V R3245 10K 1 16W 5 R3206 220K 1 16W 5 R3211 33 R3215 33 OPT R3214 33 C3223 0 047uF 25V R3228 47K R3225 47K R3217 47K R3219 47K R3218 47K R3220 47K R3229 47K R3226 47K R3241 5 1K 5 1 16W R3239 5 1K 5 1 16W R3233 5 1K 5 1 16W R3234 5 1K 5 1 16W L3201 BLM18PG121SN1D C3217 0 1uF 16V C3216 10uF 10V L3202 L3203 C3224 0 1uF 16V...

Page 29: ... 13 14 14 15 15 16 16 R3646 10K C3615 0 1uF 16V RGB_DDC_SDA SPDIF_OUT R3615 33 C3634 18pF 50V EDID_WP PC_R_IN 5V_NORMAL DSUB_HSYNC DSUB_VSYNC D3616 30V OPT PC_L_IN R3642 2 7K RGB_5V RGB_5V IC3600 M24C02 RMN6T RGB_EDID 3 E2 2 E1 4 VSS 1 E0 5 SDA 6 SCL 7 WC 8 VCC SOC_TX SOC_RX D3620 MMBD6100 A2 C A1 R3647 100 RGB_DEBUG D3623 5 6V OPT D3611 5 6V OPT D3612 5 6V OPT D3600 20V OPT D3601 20V OPT D3622 5 ...

Page 30: ... FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC R3700 10K HP_OUT HP_LOUT 3 3V_NORMAL JK3700 KJA PH 0 0177 EAG61030001 HP_OUT 3 DETECT 4 L 5 GND 1 R HP_DET HP_ROUT VA3700 5 6V OPT VA3700 1 5 6V ESD_MTK_HP_OUT VA3700 2 5 6V ESD_LG1152_HP_OUT 37 JACK_COMMON 2011 11 21 ESD for LG1152 ESD for MTK Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purpo...

Page 31: ...CT 4 M4 5 M5_GND 1 M1 6 M6 AV1_CVBS_IN COMP1_Y R3821 100 RS232 3 3V_NORMAL R3820 100 RS232 3 5V_ST 12V_COMMERCIAL_OUT 12V_COMMERCIAL_OUT 3 5V_ST R3834 10K OPT_RS232 SOC_RX 3 5V_ST SOC_TX P3800 12507WS 04L UART_4PIN_STRAIGHT 1 2 3 4 5 R3810 10K R3806 10K D3803 5 6V OPT D3800 5 6V OPT D3804 20V OPT D3805 20V OPT D3801 5 6V OPT D3802 5 6V OPT D3801 1 5 6V ESD_MTK D3802 1 5 6V ESD_MTK D3800 1 5 6V ESD...

Page 32: ... MMBT3904 NXP COMMERCIAL_IR_EU E B C Q4104 MMBT3904 NXP COMMERCIAL_IR E B C R4101 1K COMMERCIAL_IR R4109 1K COMMERCIAL_IR_EU R4115 3 3K COMMERCIAL_IR R4103 3 3K COMMERCIAL_IR R4107 10K IR_BYPASS P4102 12507WR 10L GP4_IR_10P 1 2 3 4 5 6 7 8 9 10 11 D4106 20V ADUC 20S 02 010L OPT D4105 20V ADUC 20S 02 010L OPT D4101 5 6V AMOTECH CO LTD OPT D4100 5 6V AMOTECH CO LTD OPT D4104 5 6V AMOTECH CO LTD OPT ...

Page 33: ...A SMBDATA NON_REM 1 23 VDD33_2 24 SCL SMBCLK CFG_SEL 0 25 HS_IND CFG_SEL 1 26 RESET_N 27 VBUS_DET 28 SUSP_IND LOCAL_PWR NON_REM 0 29 VDDA33_3 30 USBDM_UP 31 USBDP_UP 32 XTALOUT 5 VDDA33_1 8 NC_3 6 NC_1 4 USBDP_DN 2 2 USBDP_DN 1 33 XTALIN CLKIN 34 PLLFILT 35 RBIAS 36 VDD33_3 37 EP VSS 3 3V_NORMAL R4205 1M 1 C4203 0 1uF USB_OCD1 R4204 100K 3 3V_NORMAL 3 3V_NORMAL C4213 0 1uF C4202 0 1uF C4205 15pF R...

Page 34: ...uF 10V 5V_USB 3 3V_NORMAL USB_OCD3 C4301 22uF 10V R4332 10K POWER_ON OFF2_4 C4331 0 1uF 16V 12V L4307 3 6uH C4341 4 7uF 10V R4342 10K 5 L4306 BLM18PG121SN1D USB_CTL3 C4325 10uF 16V C4342 100pF 50V USB_DCDC_SN1104041 IC4306 1 BD86180MUV DEV_USB_DCDC_BD86180 3 SS 2 COMP 4 RT 1 EN 6 CTL1 5 CTL2 7 FLG2 8 FLG1 9 USB_OUT2 10 GND_1 11 GND_2 12 USB_OUT1 13 USB_IN_1 14 USB_IN_2 15 USB_IN_3 16 SW_1 17 SW_2 ...

Page 35: ...D EU R4600 75 EU DTV MNT_R_OUT SC_FB SC_R R4606 47K EU C4606 0 1uF 50V EU R4601 10K EU R4608 0 OPT D4611 5 6V OPT D4607 5 6V OPT D4606 5 6V OPT D4605 5 6V OPT D4608 5 6V OPT D4601 5 6V OPT D4601 1 5 6V ESD_MTK_SCART 200pF D4605 2 5 6V ESD_LG1152_SCART 200pF D4606 2 5 6V ESD_LG1152_SCART 200pF D4601 2 5 6V ESD_LG1152_SCART 200pF D4611 2 5 6V ESD_LG1152_SCART 200pF D4600 20V OPT D4600 2 20V ESD_LG11...

Page 36: ...BOL MARK OF THE SCHEMETIC M_RFModule_ISP M_REMOTE_RX M_REMOTE_TX 3 3V_NORMAL L4800 120 ohm M_REMOTE M_RFModule_RESET C4800 0 1uF P4800 12507WR 08L M_REMOTE 1 3 3V 2 GND 3 RX 4 TX 5 RESET 6 DC 7 DD 8 GND 9 AR4800 100 1 16W M_REMOTE 3D_SYNC_RF 3D_SYNC_RF ZigBee_Radio Pulse M_REMOTE OPTION ALL M_REMOTE OPTION 48 MOTION REMOTE 2011 11 21 Only For PDP Copyright ⓒ 2012 LG Electronics Inc All right reser...

Page 37: ...N_C D4 GN_A C5003 0 01uF 50V EPHY_RDP LAN_JACK_POWER D5000 5 5V OPT D5002 5 5V OPT D5003 5 5V OPT D5001 5 5V OPT D5001 2 5 5V ADUC 5S 02 0R5L ESD_LG1152 D5003 2 5 5V ADUC 5S 02 0R5L ESD_LG1152 D5002 2 5 5V ADUC 5S 02 0R5L ESD_LG1152 D5000 2 5 5V ADUC 5S 02 0R5L ESD_LG1152 D5003 1 ADUC 5S 02 0R5L ESD_MTK D5000 1 ADUC 5S 02 0R5L ESD_MTK D5002 1 ADUC 5S 02 0R5L ESD_MTK D5001 1 ADUC 5S 02 0R5L ESD_MTK...

Page 38: ...8 0 1uF 16V R5207 22 EPHY_MDIO LAN_JACK_POWER C5212 0 1uF OPT ET_COL SNI C5209 56pF C5202 56pF EPHY_INT R5201 22 L5211 100NH C5206 15pF 50V C5207 15pF 50V IC5200 RTL8201F VB CG 1 RSET 3 MDI 0 7 AVDD33_1 9 RXD 0 10 RXD 1 11 RXD 2 INTB 12 RXD 3 CLK_CTL 13 RXC 14 DVDD33 15 TXC 16 TXD 0 17 TXD 1 18 TXD 2 19 TXD 3 20 TXEN 21 PHYRSTB 22 MDC 23 MDIO 24 LED0 PHYAD 0 PMEB 25 LED1 PHYAD 1 26 CRS CRS_DV 27 C...

Page 39: ... 0 1uF C5413 16V AUD_LRCH L5401 BLM18PG121SN1D 24V_AMP SPK_R C5431 390pF 50V 24V_AMP D5403 100V 1N4148W OPT C5414 10uF 10V AMP_RESET_N R5408 12 C5433 1uF 25V L5404 NRS6045T100MMGK 10 0uH SPK_L C5435 0 47uF 50V C5428 1uF 25V I2C_SCL1 C5409 10uF 10V OPT SPK_L P5400 WAFER ANGLE 1 2 3 4 AMP_MUTE 0 1uF C5439 50V C5417 22000pF 50V R5400 10K R5410 12 SPK_R 0 1uF C5412 16V 24V C5410 10uF 10V OPT 0 1uF C54...

Page 40: ...PT L5504 NRS6045T100MMGK WOOFER 10 0uH R5501 100 WOOFER R5504 100 WOOFER 24V_AMP_WOOFER 24V_AMP_WOOFER C5526 1uF 25V WOOFER C5523 22000pF 50V WOOFER AUD_MASTER_CLK SPK_WOOFER_L R5517 4 7K 1 16W 5 WOOFER_MONO R5518 4 7K 1 16W 5 WOOFER_MONO C5504 4 7uF 10V WOOFER P5500 FW25001 02 SPK 2P WOOFER 1 2 R5515 5 1K WOOFER R5516 5 1K WOOFER L5501 CIS21J121 WOOFER 24V_AMP_WOOFER 0 1uF C5529 50V WOOFER 24V R5...

Page 41: ...PT R6008 33K EU 3 5V_ST C6004 0 1uF 50V EU R6000 2 2K EU L6000 EU R6002 470K OPT Q6000 MMBT3904 NXP EU E B C R6011 2 2K EU DTV MNT_R_OUT C6003 33pF EU DTV MNT_L_OUT Q6001 MMBT3904 NXP EU E B C DTV MNT_L_OUT R6004 33K EU C6002 6800pF OPT C6007 6800pF OPT C6008 1uF 25V EU C6000 1uF 25V EU IC6000 AZ4580MTR E1 EU 3 IN1 2 IN1 4 VEE 1 OUT1 5 IN2 6 IN2 7 OUT2 8 VCC SCART_AMP_R_FB SCART_AMP_L_FB R6013 510...

Page 42: ...MBOL MARK OF THE SCHEMETIC Q6201 AO3407A CI G D S 5V_CI_ON C6207 4 7uF 10V OPT R6218 10K CI 5V_NORMAL C6202 0 1uF 16V OPT R6242 2 2K CI R6221 10K OPT PCM_5V_CTL R6248 10K CI R6223 4 7K CI R6241 22K CI Q6200 MMBT3904 NXP CI E B C C6210 1uF 25V OPT C6210 1 1uF 25V CI_MTK CI POWER ENABLE CONTROL 62 CI SLOT 2011 10 31 Option FOR MTK Option FOR LG1152 Copyright ⓒ 2012 LG Electronics Inc All right reser...

Page 43: ...402 1uF 10V HP_ROUT_MAIN R6400 4 7K R6405 1K C6406 2 2uF 10V HP_LOUT Q6400 MMBT3904 NXP E B C IC6400 TPA6132A2 EAN60724701 3 INR 2 INL 4 INR 1 INL 5 OUTR 6 G0 7 G1 8 HPVSS 9 CPN 10 PGND 11 CPP 12 HPVDD 13 EN 14 VDD 15 SGND 16 OUTL HP_LOUT_MAIN R6401 OPT R6402 4 7K 3 3V_NORMAL C6404 2 2uF 10V C6407 2 2uF 10V C6403 10uF 10V HP_AMP_MUTE R6406 10 1 16W 5 R6407 10 1 16W 5 C6408 0 47uF 16V C6409 0 47uF ...

Page 44: ...1 D1 22 D2 23 D3 24 D4 25 D5 26 D6 27 D7 28 GND_2 29 GND_3 30 1 23V_S2_DEMOD 31 S2_RESET 38 SHIELD 32 3 3V_S2_DEMOD 33 S2_F22_OUTPUT 34 S2_SCL 35 S2_SDA 36 LNB 37 GND_4 TU6502 TDSQ H051F CHB_V 1 5V SPLITTER 2 RESET 3 TU_SCL 4 TU_SDA 5 M_ 3 3V 6 M_SIF 7 M_ 1 8V 8 M_CVBS 9 M_IF_AGC 10 M_DIF P 11 M_DIF N 12 S_3 3V 13 S_1 8V 14 S_CVBS 15 GND_1 16 SD_ERROR 17 SD_SYNC 18 SD_VALID 19 SD_MCLK 20 SD_SERIAL...

Page 45: ... 22 BFO 23 NC_9 24 BFI 25 VIN 26 LX 27 GNDLX 28 LNB 5 TDO 8 GND 6 EXTM 4 NC_1 2 VCP 29 EP C6908 27pF OPT C6903 0 1uF LNB C6909 27pF OPT D6902 40V LNB_SMAB34 A_GND 3 3V_NORMAL DCDC_GND A_GND 12V_LNB A_GND C6911 0 1uF 50V LNB C6904 0 1uF 50V LNB C6912 68uF 35V LNB D6900 30V MBR230LSFT1G LNB R6906 2 2K 1W LNB D6904 LNB C6910 10uF 25V LNB R6904 0 R6905 0 C6916 18pF LNB C6915 18pF OPT C6913 33pF OPT C6...

Page 46: ...2P 34 GND 35 RBCLKN 36 RBCLKP 37 GND 38 RB3N 39 RB3P 40 RB4N 41 RB4P 42 GND 43 GND 44 GND 45 GND 46 GND 47 NC 48 VLCD 49 VLCD 50 VLCD 51 VLCD 52 GND P7101 FI RE41S HF J R1500 OPT 1 NC 2 NC 3 NC 4 NC 5 NC 6 NC 7 NC 8 NC 9 GND 10 RC0N 11 RC0P 12 RC1N 13 RC1P 14 RC2N 15 RC2P 16 GND 17 RCCLKN 18 RCCLKP 19 GND 20 RC3N 21 RC3P 22 RC4N 23 RC4P 24 GND 25 GND 26 RD0N 27 RD0P 28 RD1N 29 RD1P 30 RD2N 31 RD2P...

Page 47: ...RITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC I2C_SCL1 L DIM0_SCLK R7601 10K L DIM_OUT 3 3V_NORMAL L DIM0_MOSI R7607 4 7K L DIM_OUT R7606 33 L DIM_OUT P7600 12507WR 08L L DIM_OUT 1 2 3 4 5 6 7 8 9 I2C_SDA1 L DIM0_VS R7600 10K OPT AR7600 33 1 16W L DIM_OUT LOCAL DIMMING To LED DRIVER 76 LOCAL DIMMING 2011 12 13 Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and se...

Page 48: ...C_109 N10 NC_110 N11 NC_111 N12 NC_112 N13 NC_113 N14 NC_114 P1 NC_115 P2 NC_117 P8 NC_118 P9 NC_120 P11 NC_121 P12 NC_122 P13 NC_123 P14 DUMMY_1 DU1 DUMMY_2 DU2 DUMMY_3 DU3 DUMMY_4 DU4 DUMMY_5 DU5 DUMMY_6 DU6 DUMMY_7 DU7 DUMMY_8 DU8 DUMMY_9 DU9 DUMMY_10 DU10 DUMMY_11 DU11 DUMMY_12 DU12 DUMMY_13 DU13 DUMMY_14 DU14 DUMMY_15 DU15 DUMMY_16 DU16 IC8100 2 KLM2G1HE3F B001 SAMSUNG_EMMC_2GB DAT0 A3 DAT1 A...

Page 49: ...R THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC 3 5V_ST L8900 BLM18PG121SN1D LOGO_LIGHT P8900 12507WR 03L LOGO_LIGHT 1 2 3 4 Q8900 MMBT3904 NXP LOGO_LIGHT E B C LOGO_LIGHT R8903 1K LOGO_LIGHT 3 5V_ST R8901 10K LOGO_LIGHT R8902 10K OPT C8900 0 1uF 16V LOGO_LIGHT R8900 22 LOGO_LIGHT Place Near Micom Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service pu...

Page 50: ... P6 VSS_70 P7 VSS_71 P12 VSS_72 U16 NC L9 HW_RESET J3 TESTPIN_1 D1 TESTPIN_2 D2 TESTPIN_3 D3 TESTPIN_4 E1 TESTPIN_5 E2 TESTPIN_6 E3 TESTPIN_7 F1 TESTPIN_8 F2 M0_SCLK C17 M0_MOSI D16 M1_SCLK D17 M1_MOSI E15 M2_SCLK E14 M2_MOSI E13 M3_SCLK E12 M3_MOSI F13 SPI_CK T9 SPI_CZ U10 SPI_DI U9 SPI_DO T10 TXA0P GCLK6 BLUE 7 C8 TXA0N GCLK5 BLUE 6 C9 TXA1P OPT_N LK3 BLUE 9 B8 TXA1N FLK BLUE 8 A8 TXA2P GREEN 1 ...

Page 51: ... FRC_DQU 7 AR9700 22 FRC_DQL 2 FRC_BA2 FRC_CKE DDR3_CASB C9708 0 1uF FRC_DQL 0 DDR3_A 1 DDR3_RESETB FRC_A 13 DDR3_A 10 R9718 22 C9709 0 1uF AR9707 22 C9702 0 1uF 16V FRC_A 4 AR9706 22 DDR3_DQL 6 FRC_A 12 1 5V_FRC_DDR DDR3_DQSLB DDR3_DQU 1 MVREFDQ C9712 0 1uF R9717 22 DDR3_A 2 FRC_ODT R9709 22 DDR3_WEB DDR3_A 0 13 DDR3_DQL 4 DDR3_DQU 2 C9713 0 1uF DDR3_DQU 0 7 DDR3_BA1 DDR3_BA1 R9703 1K 1 DDR3_CKE ...

Page 52: ...8 VIN 9 EP GND 12V C9812 22uF 10V POWER_ON OFF2_2 R9806 10K OPT 12V C9801 10uF 16V R9807 10K 1 R9805 10K L9801 BLM18PG121SN1D C9805 1uF 10V IC9801 TPS54327DDAR 3 VREG5 2 VFB 4 SS 1 EN 5 GND 6 SW 7 VBST 8 VIN 9 EP GND C9811 22uF 10V C9809 0 1uF 16V POWER_ON OFF2_2 1 26V_FRC R9801 6 8K 1 R9803 1K 1 R9808 12K 1 3 3V_FRC R9802 33K 1 R9804 220 1 C9813 22uF 10V OPT C9807 3300pF 50V L9803 3 6uH NR8040T3R...

Page 53: ...MAL 3 3V_IR_Bla 5V_NORMAL C11009 0 1uF 16V OPT R11021 10K IR_Bla Q11003 MMBT3904 NXP IR_Bla E B C R11001 1K IR_Bla C11010 0 1uF 16V IR_Bla D11002 IR_Bla IC11002 MC96FR3128R IR_Bla 3 XOUT 2 XIN 4 P20 RESETB 1 VSS 6 P11 KS9 MISO1 5 P10 KS8 MOSI1 7 P12 KS10 INT0 8 P13 KS11 INT1 9 P14 KS12 SS1 INT2 10 P15 KS13 XCK1 INT3 11 P16 KS14 MOSI0 12 P17 KS15 MISO0 13 P30 SS0 EC2 EXTREF 14 P31 XCK0 SENSOR 15 P3...

Page 54: ......

Page 57: ...3 4 Micom for Key IR sensing HDMI switch 4 1 Audio AMP 10W XXG2 UG IR Blaster Local Key IR Motion assy Front Spk Local Dim 2 Main processor_analog LG1152A 5 FRC IC DDR Memory 6 5 6 Wifi Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 58: ...Pr PC_R G B H V HDMI Switch HDMI1 4 L9 LG1152A USB1 USB2 USB3 USB HUB PHY RMII LAN Qwerty R Q Remote_R TX Audio AMP OPTIC SPK SPDIF I2S 16 DDR 16 DDR 256MB 4 1600 128MB 1 1600 8 eMMC 4GB 1 Built in WiFi FRC LG7303 HS_LVDS 2Link CHB_DATA L9 Block diagram Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 59: ...MC NR Vertical MC IPC Scaler PE OSD VCR LVDS H 264 Encoder SD upto 480p 12 PHY 3 port USB2 0 Host x3 DDR3 PHY DDR3 x16 3 Ethernet MAC eMMC Controller CPU Dual C A9 1GHz Graphic Engine 2D VG 3D Open ES2 0 Audio 10 data 1 en 5 gc 4 val err clk sop 8 data I2C I2C 6 gbb l9da I2C Digital Audio Output LVDS LVDS Video LVDS Video OSD LVDS Audio PLL w DCO I2S mono 3 lrck lrch sck I2C SW SW 3D or UD Data br...

Page 60: ...7Mhz 2 port USB PHY 1 port USB PHY 30 48Mhz 30 48 Mhz i_core800_clk i_core320_clk i_m01_ddrclk i_m2_ddrclk u_crg Clock Divide Reset generation w test logic Clock Divide Reset generation w test logic Clock Divide Reset generation w test logic Clock Divide Reset generation w test logic Clock Divide Reset generation w test logic USB controller About 220 internally generated clocks SSC setting 0xFD300...

Page 61: ...C CH6 Main IF_AGC IF N P Main SoC IFAGC ATSC ADC_I_INN P SCL DA6_3 3V L9 B1 TU_RESET TU_SIF TU_CVBS L9 Block diagram Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 62: ...Pb Pr Component 1 Phone JACK _Green DSUB_R G B RGB_EDID IC3600 M24C02 RMN6T RGB_EDID IC3600 M24C02 RMN6T DSUB_DET DSUB_V H SYNC EDID_WP MICOM EDID_WP MICOM RGB R G B_IN V H SYNC GPIO22 BB_TP CHB DAC AAD _DATA HSR_P M AV1_CVBS_DET COMP1_DET DSUB_DET SPDIF GPIO4 L9 Block diagram Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 63: ...BUF I2C2_SDA SCL MICOM AUD_SCK LRCK LRCH AMP_RESET AMP_MUTE MAIN 4P wafer L9 LG1152 TU_SIF NTP7500 0x54 NTP7500 0x54 L9 Block diagram Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 64: ...I_HPD_2 5V_HDMI_2 HDMI HDMI 3 3 CEC_REMOTE HDMI_HPD_3 5V_HDMI_3 HDMI HDMI 4 4 CEC_REMOTE HDMI_HPD_4 5V_HDMI_4 L9_B1 Main SoC IC100 LG1152D B1 TMDS Link 8bits TMDS Link 8bits TMDS Link 8bits TMDS Link 8bits DDC_I2C 2bits DDC_I2C 2bits DDC_I2C 2bits DDC_I2C 2bits MICOM IC3000 R5F100GEAFB CEC_REMOTE L9 Block diagram Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service ...

Page 65: ... B1 USB_DM2 DP2 USB1 DVR Ready USB WIFI WIFI_DM DP USB_DM1 DP1 BT_USB_DP DM USB HUB USB_HUB_IC_IN_DP DM USB_DM2 DP2 SOC_RX SOC_RX SOC_TX SOC_RX 4Pin debugging Wafer P3800 L9 Block diagram Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 66: ...IC11002 MC96FR3128 IR OUT I2C_SDA3 SCL2 GPIO56 SDA2 GPIO71 IR_B_RESET SPI_DI0 GPIO39 SPI_DO0 GPIO38 SPI_SCLK0 GPIO37 SPI_CS0 GPIO36 IRB_SPI_MOSI IRB_SPI_MISO IRB_SPI_CK IRB_SPI_SS Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 67: ...in High Check Power Board or Module Check IC2300 1 2 3 4 5 6 Output Voltage IC2300 1 8V IC2301 3 3V IC2302 1 5V IC2303 2 5V IC2304 5V IC2305 0 9V IC2306 1V Replace 2300 1 2 3 4 5 6 Re download Micom software Check Micom Voltage IC3000 48 pin 3 5V Replace L2303 Check LVDS Power Voltage Q2305 12V Replace Q2305 ok ok ok ok ok ok ok ok No No No No No No No No No Check X101 Clock 24 MHz Replace X101 ok...

Page 68: ...ce IC101 Chip Replace IC101 ok ok ok ok No No No No Bad Tuner Replace Tuner 2 Trouble shooting No video Digital TV video Check L9 D chip IC100 Chip Replace IC100 or Main Board No ok Check DIF at destination C116 C117 Bad Capacitor Replace Capacitor ok No Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 69: ...in 1 8V Replace IC6503 ok No No Check CVBS buffer Q6501 Emitter No Bad TR Replace TR ok Check CVBS signal at destination R571 C549 No Bad Resistor or Capacitor Replace Resistor or Capacitor Check L9 Ace IC101 Chip Replace IC101 No Check L9 D chip IC100 Chip Replace IC100 or Main Board No ok ok Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Interna...

Page 70: ...Line AV1_CVBS_IN L504 ok ok ok No Replace Jack ok Check CVBS_DET Signal AV1_CVBS_DET R3810 Replace R3810 or Jack No No Check L9 Ace IC101 Chip Replace LG1152A IC101 or Main Board ok No Check L9 D chip IC100 Chip Replace IC100 or Main Board Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 71: ...l Line ok ok ok No Replace Jack Check COMP1_DET Signal Replace R3806 or Jack No ok No Check L9 Ace IC101 Chip Replace IC101 5 Trouble shooting No video Component ok No Check L9 D chip IC100 Chip Replace IC100 or Main Board Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 72: ...0 L502 L500 L501 ok ok ok No No Re download EDID data or Replace the defective IC ok Replace Jack or Replace the defective element Check DSUB_DET Replace R3646 No ok No Check L9 Ace IC101 Chip Replace IC101 6 Trouble shooting No video RGB PC ok No Check L9 D chip IC100 Chip Replace IC100 or Main Board Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE...

Page 73: ...K3200 JK3201 JK3203 ok ok ok No No Replace Coil ok Replace Jack Check HDMI Signal output of HDMI Switch IC3201 Replace the defective IC No Check L3200 3 3V Replace the defective IC No OK ok No Check L9 Ace IC101 Replace IC 101 ok No Check L9 D chip IC100 Replace IC 100 or Main Board Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 74: ...ggle the Menu Check AMP IC IC5400 Power 24V 3 3V No Check BEAD Regulator L5400 L5401 L2304 Check LG1152 I2S Output R543 R545 No Check signal line Or replace LG1152 IC100 Check AUDIO_MASTER_CLK R542 No Replace LG1152 IC100 or Main Board ok Check AMP I2C Line R5402 R5403 No Check signal line Or replace LG1152 IC100 Check AMP IC RESET FAULT PIN MUTE low is mute high is un mute Check reset mute signal...

Page 75: ...wer L6503 ok ok ok No No Bad Tuner Replace Tuner No Replace L6503 9 Trouble shooting No audio Digital TV audio Follow procedure 8 All source audio trouble shooting guide ok Replace IC6503 No Replace L6500 ok Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 76: ...ce Tuner Follow procedure 8 All source audio trouble shooting guide ok No Replace TR Check RF Cable Signal Check Tuner 1 8V Power L6500 Check IC6503 Check Tuner 3 3V Power L6503 ok ok ok No No Replace L6503 Replace IC6503 No Replace L6500 ok Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 77: ...ow procedure 8 All source audio trouble shooting guide ok AV COMPO NENT Check PC Cable for damage or open conductor ok Check input signal L506 L509 ok Check PC_L PC_R path Including L506 L509 to LG1152A IC101 No Replace component No Replace JK3601 Follow procedure 8 All source audio trouble shooting guide ok PC Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service pu...

Page 78: ...IF_OUT Signal 3 3V ok No Check R630 C630 C3615 Replace LG1152D IC100 12 Trouble shooting No audio SPDIF ok Replace JK3602 SPDIF Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 79: ... at Bead or Jack Y Replace one of IC4303 USB1 or IC4306 USB2 3 and then check N Maybe IC4200 USB1 2 or IC100 USB1 2 3 has problems Replace It Exception USB power could be disabled by inrushing current In this case remove the device and try to reboot the TV AC power off on Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 80: ... Check LAN Cable Recheck LAN Cable N Y Check MAC Address Replace Main B D N Y Check RMII Rx Tx Signal Line R 5206 R 5207 R 108 R 106 N Replace R 5206 R 5207 R 108 R 106 Y Check L9 D chip IC 100 N Replace IC 100 or Main Board Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 81: ... N Correct the Tool Option3 using reference file GP4_L9_TOOL OPTION N Correct the Tool Option4 using reference file GP4_L9_TOOL OPTION N Correct the Tool Option5 using reference file GP4_L9_TOOL OPTION Reference file Y Check the Tool Option 6 N Correct the Tool Option6 using reference file GP4_L9_TOOL OPTION Y Check the Tool Option 7 N Correct the Tool Option7 using reference file GP4_L9_TOOL OPTI...

Page 82: ...n The latest S W put in the LG DTV folder of USB Memory USB connects to USB jack for service The SW update is finished please check new SW version by in start menu Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 83: ...1 Main PCB 2 Soft Touch IR PCB 3 RF Motion ASSY 4 Wi Fi ASSY 5 T CON ASSY 6 PSU PCBs XXG2 UG 1 6 4 3 2 5 31 Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 84: ...eries RF MOTION ASSY To Main SPK unit 4 WIFI ASSY 3 RF MOTION ASSY 2 1 Soft Touch IR PCB Soft Touch IR PCB WIFI ASSY 32 Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 85: ...g power auto on off 40 8 C Audio error No audio Normal video 41 9 Wrecked audio discontinuation noise 42 10 D Function error Remote control Soft Touch Key checking 43 Qwerty Remote Motion operating checking 44 11 12 Wi Fi operating checking 45 13 External device recognition error 46 14 E Noise Circuit noise mechanical noise 47 15 F Exterior error Exterior defect 48 First of all Check whether there...

Page 86: ...k record S W Version and White Balance value before replacing the Main Board Replace Main Board Re enter White Balance value Precaution Established date Standard Repair Process Revised date 2012 03 21 LCD TV Error symptom A Video error No video Normal audio A4 A1 A2 A7 A3 First of all Check whether all of cables between board is inserted properly or not Main B D Power B D LVDS Cable Speaker Cable ...

Page 87: ...ce MAIN B D Y Replace Power Board and repair parts N End Standard Repair Process A Video error No video No audio A4 Established date Revised date LCD TV Error symptom 35 2012 01 16 2012 03 21 Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 88: ...ng Normal Picture Y N Y Close Y Close By using Digital signal level meter By using Diagnostics menu on OSD Setting Set up Manual Tuning Check the Signal Signal strength Normal over 50 Signal Quality Normal over 50 Normal Picture Y Contact with signal distributor or broadcaster Cable or Air N Normal Picture Y Close N A7 Standard Repair Process Established date Revised date LCD TV Error symptom 36 N...

Page 89: ... and cable Y External device Cable normal RGB HDMI DVI error Check external device and cable Replace Main B D Replace Main B D N N A Video error Color error A9 N Y End Replace module Request repair for external device cable Color error Check Test pattern A12 A10 Standard Repair Process Established date Revised date LCD TV Error symptom 37 2012 01 16 2012 03 21 Copyright ⓒ 2012 LG Electronics Inc A...

Page 90: ...HDMI DVI by connecting Jig pattern Generator Set top Box etc N Y Replace Main B D Screen normal Check screen condition by input External Input Component RGB HDMI DVI Request repair for external device Component error RGB error HDMI DVI Connect other external device and cable Check normal operation of External Input Component RGB and HDMI DVI by connecting Jig pattern Generator Set top Box etc Repl...

Page 91: ...of Power B D N Y Normal voltage Replace Main B D N Y OK Replace Main B D N Y Normal Check ST BY 3 5V Replace Power B D N Y Normal voltage Replace Power B D Y A17 A18 A19 A4 Standard Repair Process Established date Revised date LCD TV Error symptom 39 Stand By Red or Turn Off Operating Turn Off Close 2012 01 16 2012 03 21 Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and ...

Page 92: ...E CONTROL POWEROFF_OFFTIMER Power off by OFF TIMER POWEROFF_SLEEPTIMER Power off by SLEEP TIMER POWEROFF_INSTOP Power off by INSTOP KEY POWEROFF_AUTOOFF Power off by AUTO OFF POWEROFF_ONTIMER Power off by ON TIMER POWEROFF_RS232C Power off by RS232C POWEROFF_RESREC Power off by Reservated Record POWEROFF_RECEND Power off by End of Recording POWEROFF_SWDOWN Power off by S W Download POWEROFF_UNKNOW...

Page 93: ...r parts Check Speaker disconnection N Y Replace Speaker Replace MAIN Board End C Audio error No audio Normal video A24 A25 Disconnection Established date Revised date LCD TV Error symptom Standard Repair Process 41 2012 01 16 2012 03 21 Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 94: ...d check other external device N Y Normal audio Check and fix external device Replace Power B D N Y Normal voltage Check input signal RF External Input signal Signal normal When RF signal is not received Request repair to external cable ANT provider Y Check audio B Voltage 24V Replace Main B D In case of External Input signal error Check and fix external device Replace Main B D N End Established da...

Page 95: ... R C Check Repair Cable connection Connector solder Normal operating Check B 3 5V On Main B D A27 Normal Voltage Close N N Check 3 5v on Power B D Replace Power B D or Replace Main B D Power B D don t have problem A4 Check IR Output signal Normal Signal N Y Repair Replace IR B D N A27 Replace Main B D Y A27 Standard Repair Process Established date Revised date LCD TV Error symptom 43 2012 01 16 Y ...

Page 96: ... symptom 44 2012 01 16 Replace Qwerty Remote Turn off on the set and press the wheel Press the back key about 5sec Close If you conduct the loop at 3times change the Qwerty Remote Y Check the INSTART menu RF Receiver ver is 00 00 Y Check Repair RF assy connection N Down load the Firmware INSTART MENUÆ15 RF Remocon TestÆ3 Firmware download Y RF Receiver ver is 00 00 N Close A28 A7 A7 2012 03 21 Cop...

Page 97: ...k the Wi Fi wafer P4301 _1pin Standard Repair Process Established date Revised date LCD TV Error symptom 45 2012 01 16 Change the Wi Fi Assy Normal Voltage Close Y Y N Replace Main B D Wi Fi Mac value is NG N Close A29 A7 A7 A29 2012 03 21 Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 98: ...ce cable RGB HDMI DVI Optical Recognition error Replace Main B D Replace Main B D Fix in accordance with technical information D Function error External device recognition error Established date Revised date LCD TV Error symptom Standard Repair Process 46 2012 01 16 2012 03 21 Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 99: ...n manual For models without any fix information provide the description OR Mechanical noise is a natural phenomenon and apply the 1st level description When the customer does not agree apply the process by stage Describe the basis of the description in Part related to nose in the Owner s Manual E Noise Circuit noise mechanical noise Established date Revised date LCD TV Error symptom Standard Repai...

Page 100: ...ontroller Remote controller damage Stand dent Replace stand F Exterior defect Exterior defect Established date Revised date LCD TV Error symptom Standard Repair Process 48 2012 01 16 2012 03 21 Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 101: ... TV Version checking method A7 7 Tuner Checking Part A8 8 A Video error _Vertical Horizontal bar residual image light spot LCD TV connection diagram A9 9 A Video error_ Color error Check Link Cable LVDS reconnection condition A10 10 Adjustment Test pattern ADJ Key A12 11 Appendix Defected Type caused by T Con Inverter Module Exchange T Con Board 1 A 1 5 12 Exchange T Con Board 2 A 2 5 13 Exchange ...

Page 102: ...king method A22 20 C Audio error_ No audio Normal video Checking method in menu when there is no audio A24 22 Voltage and speaker checking method when there is no audio A25 22 D Function error Remote controller operation checking method A27 23 Motion Remote operation checking method A28 24 Wifi operation checking method A29 25 E Etc Tool option changing method A30 Continued from previous page Copy...

Page 103: ...ight with naked eye A Video error_No video Normal audio After turning on the power and disassembling the case check with the naked eye whether you can see light from locations XXG2 UG LCD TV A1 2011 12 14 Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 104: ...ring method A Video error_No video Normal audio A2 Established date Revised date Error symptom Content LCD TV A2 Check the DC 24V and Inverter on 2011 12 14 Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 105: ...hite Balance value A Video error_No video Normal audio ALL MODELS A3 Established date Revised date Error symptom Content LCD TV A3 Entry method 1 Press the ADJ button on the remote controller for adjustment 2 Enter into White Balance of item 9 3 After recording the R G B GAIN Cut value of Color Temp Cool Medium Warm re enter the value after replacing the MAIN BOARD 2011 12 14 Copyright ⓒ 2012 LG E...

Page 106: ...e DC 24V 12V 3 5V 2011 12 14 24 Pin Power Board Main Board 공통 SMAW200 H24S YEONHO 1 Power on 2 24V 3 24V 4 24V 5 GND 6 GND 7 GND 8 GND 9 3 5V 10 3 5V 11 3 5V 12 3 5V 13 GND 14 GND 15 GND 16 V sync 17 12V 18 DRV_ON 19 12V 20 N C 21 12V 22 PWM Dim 1 23 PWM Dim 2 24 Error out Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 107: ...Repair Process Detail Technical Manual TUNER input signal strength checking method A Video error_Video error video lag stop ALL MODELS A6 Established date Revised date Error symptom Content LCD TV A6 2011 12 14 Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 108: ...Checking method for remote controller for adjustment Press the IN START with the remote controller for adjustment Version ALL MODELS A7 Established date Revised date Error symptom Content LCD TV A7 2011 12 14 Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 109: ... power supply finally replace the MAIN BOARD Standard Repair Process Detail Technical Manual TUNER checking part A Video error_Video error video lag stop ALL MODELS A8 Established date Revised date Error symptom Content LCD TV A8 2011 12 14 Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 110: ...ar residual image light spot As the part connecting to the external input check the screen condition by signal A9 Established date Revised date Error symptom Content LCD TV A9 ALL MODELS 2011 12 14 Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 111: ... error_Color error Check the contact condition of the Link Cable especially dust or mis insertion A10 Established date Revised date Error symptom Content LCD TV A10 ALL MODELS 2011 12 14 Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 112: ...sing the ADJ Key Checking item 1 Defective pixel 2 Residual image 3 MODULE error ADD BAR SCAN BAR 4 Video error Classification of MODULE or Main B D A12 Established date Revised date Error symptom Content LCD TV A12 2011 12 14 Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 113: ...r error _No power A17 Established date Revised date Error symptom Content LCD TV A17 ST BY condition Red or Turn Off Power ON condition Turn Off 2011 12 14 XXG2 UG Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 114: ... 2011 12 14 24 Pin Power Board Main Board 공통 SMAW200 H24S YEONHO 1 Power on 2 24V 3 24V 4 24V 5 GND 6 GND 7 GND 8 GND 9 3 5V 10 3 5V 11 3 5V 12 3 5V 13 GND 14 GND 15 GND 16 V sync 17 12V 18 DRV_ON 19 12V 20 N C 21 12V 22 PWM Dim 1 23 PWM Dim 2 24 Error out XXG2 UG Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 115: ...12V 20 N C 21 12V 22 PWM Dim 1 23 PWM Dim 2 24 Error out Standard Repair Process Detail Technical Manual Checking method when power is ON B Power error _No power A19 Established date Revised date Error symptom Content LCD TV A19 Check power on pin is high 2011 12 14 XXG2 UG Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 116: ...andard Repair Process Detail Technical Manual POWER OFF MODE checking method B Power error _Off when on off whiling viewing A22 Established date Revised date Error symptom Content LCD TV A22 2011 12 14 XXG2 UG Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 117: ...er from Off to On Standard Repair Process Detail Technical Manual Checking method in menu when there is no audio C Audio error_No audio Normal video A24 Established date Revised date Error symptom Content LCD TV A24 2011 12 14 XXG2 UG Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 118: ...upplied from Power Board If there is no input voltage remove and check the connector Connect the tester RX1 to the speaker terminal and if you hear the Chik Chik sound when you touch the GND and output terminal the speaker is normal Standard Repair Process Detail Technical Manual Voltage and speaker checking method when there is no audio C Audio error_No audio Normal video A25 Established date Rev...

Page 119: ...d defective when it does not move at all Standard Repair Process Detail Technical Manual Remote controller operation checking method D Function error A27 Established date Revised date Error symptom Content LCD TV A27 P4102 1 SCL 2 SDA 3 GND 4 KEY1 5 KEY2 6 St 3 5V 7 GND 8 GP4_LED_R 9 IR 10 GND 2011 12 14 XXG2 UG Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service p...

Page 120: ...s Detail Technical Manual Motion Remote operation checking method Established date Revised date Error symptom Content LCD TV A28 P4800 1 3 3V 2 GND 3 RX 4 TX 5 RESET 6 DC 7 DD 8 GND 2011 12 14 A28 D Function error XXG2 UG Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 121: ... Repair Process Detail Technical Manual Wifi operation checking method A29 Established date Revised date Error symptom Content LCD TV A29 P4301 1 VDD 2 DM 3 DP 4 GND 2011 12 14 D Function error XXG2 UG Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 122: ...ry has each password Standard Repair Process Detail Technical Manual Tool option changing method A30 Established date Revised date Error symptom Content LCD TV A30 2012 02 03 E Etc XXG2 UG Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Search results

Summary of Contents for 55G2

Reviews:

Related manuals for 55G2

Brands by name

Popular brands

LG 55G2, Service Manual

Search results

Summary of Contents for 55G2

Reviews:

Related manuals for 55G2

Brands by name

Popular brands