LG 32LB550B Service Manual Download Page 46

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→ abnormal audio/discontinuation/noise is same after

→ abnormal audio/discontinuation/noise is same after “Check input signal” compared to No audio

“Check input signal” compared to No audio

C. Audio error

Wrecked audio/

Wrecked audio/ discontinuat

discontinuation/noise

ion/noise

Wrecked audio/

Discontinuation/

Noise for

all audio

Check and replace

Check and replace
speaker and

speaker and
connector

connector

Wrecked audio/

Discontinuation/

Noise only

for D-TV

Wrecked audio/

Discontinuation/

Noise only

for Analog

Wrecked audio/

Discontinuation/

Noise only

for External Input

Connect and check

Connect and check
other external device

other external device

Normal

audio?

Check and fix external device

Replace Power B/D

Normal

voltage?

Check input

Check input
signal

signal
-RF

-RF
-External Input

-External Input
signal

signal

Signal

normal?

(When RF signal is not

(When RF signal is not
received)

received)
Request repair to external

Request repair to external
cable/ANT provider

cable/ANT provider

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

End

Established

date

Revised date

10/14

LCD TV

Error

symptom

Standard Repair Process

A16

2012. 01 .14

Summary of Contents for 32LB550B

Page 1: ...AUTIONS IN THIS MANUAL READ THE SAFETY PRECAUTIONS IN THIS MANUAL LED TV LED TV SERVICE MANUAL SERVICE MANUAL North Latin North Latin America America http aic lgservice com http aic lgservice com Europe Africa http eic lgservice com Europe Africa http eic lgservice com Asia Oceania Asia Oceania http biz lgservice com http biz lgservice com Internal Use Only Internal Use Only ...

Page 2: ...RODUC PRODUCT T SAFETY SAFETY 3 3 SPECIFIC SPECIFICA ATION TION 4 4 ADJUSTME ADJUSTMENT NT INSTRUCT INSTRUCTION ION 10 10 BLOCK DIAGRAM BLOCK DIAGRAM 17 17 EXPLODE EXPLODED D VIEW VIEW 18 18 SCHEMA SCHEMATIC TIC CIRCUIT CIRCUIT DIAGRAM DIAGRAM ...

Page 3: ...m Resistor over 1 W keep the over 1 W keep the resistor 10 mm away from PCB resistor 10 mm away from PCB Keep wires away from high voltage or Keep wires away from high voltage or high temperature parts high temperature parts Before returning the receiver to the Before returning the receiver to the customer customer always perform an always perform an AC leakage current check AC leakage current che...

Page 4: ...defeat any plug socket B voltage interlocks with which 2 After removing an electrical assembly equipped with ES 2 After removing an electrical assembly equipped with ES devices place the assembly on a conductive surface such as devices place the assembly on a conductive surface such as aluminum foil to prevent electrostatic charge buildup or expo aluminum foil to prevent electrostatic charge build...

Page 5: ...istor Device Power Output Transistor Device 3 Solder the connections 3 Solder the connections CAUTION Maintain original spacing between the replaced CAUTION Maintain original spacing between the replaced component and adjacent components and the circuit board to component and adjacent components and the circuit board to prevent excessive component temperatures prevent excessive component temperatu...

Page 6: ...ormance of each parts are followed each drawing and specification by part number in each drawing and specification by part number in accordance with BOM accordance with BOM 5 The receiver must be operated for about 20 minutes prior to 5 The receiver must be operated for about 20 minutes prior to the adjustment the adjustment 3 Test method 3 Test method 1 Performance LGE TV test method followed 1 P...

Page 7: ... 56 60 00 0 S SB B 39LB5610 SC 39LB5610 SC L LC C4 42 20 0D DU UE E F FG GA A4 4 F FH HD D 6 60 0H Hz z L LG GD D 4 42 2L LB B5 56 60 00 0 S SB B L LC C4 42 20 0D DU UE E F FG GA A3 3 F FH HD D 6 60 0H Hz z L LG GD D 4 42 2L LB B5 56 61 10 0 S SC C T T4 42 20 0H HV VF F0 07 7 0 0 F FH HD D 6 60 0H Hz z A AU UO O 4 42 2L LB B5 56 61 10 0 S SC C L LC C4 47 70 0D DU UE E F FG GA A4 4 F FH HD D 6 60 0...

Page 8: ... 25 5 H HD DT TV V 7 72 20 0P P 9 9 1 12 28 80 0 7 72 20 0 4 44 4 9 96 6 5 59 9 9 94 4 7 74 4 1 17 76 6 H HD DT TV V 7 72 20 0P P 1 10 0 1 19 92 20 0 1 10 08 80 0 2 28 8 1 12 25 5 5 50 0 0 00 0 7 74 4 2 25 50 0 H HD DT TV V 1 10 08 80 0I I 1 11 1 1 19 92 20 0 1 10 08 80 0 3 33 3 7 75 5 6 60 0 0 00 0 7 74 4 2 25 5 H HD DT TV V 1 10 08 80 0I I 1 12 2 1 19 92 20 0 1 10 08 80 0 3 33 3 7 72 2 5 59 9 9 ...

Page 9: ... WX XG GA A O O 8 8 1 12 28 80 0 1 10 02 24 4 F FH HD D O On nl ly y 6 63 3 9 98 81 1 6 60 0 0 02 2 1 10 08 8 0 00 0 V VE ES SA A S SX XG GA A O O 9 9 1 19 92 20 0 1 10 08 80 0 F FH HD D O On nl ly y 6 67 7 5 5 6 60 0 1 14 48 8 5 5 H HD DT TV V 1 10 08 80 0P P O O DTV DTV 1 1 7 72 20 0 4 48 80 0 3 31 1 4 46 69 9 5 59 9 9 94 40 0 2 27 7 0 00 00 0 S SD DT TV V 4 48 80 0P P 2 2 7 72 20 0 4 48 80 0 3 ...

Page 10: ... Download Boot file Download 1 Execute ISP program Mstar ISP Utility and then click 1 Execute ISP program Mstar ISP Utility and then click Config tab Config tab 2 Set as below and then click Auto Detect and check OK 2 Set as below and then click Auto Detect and check OK message message If Error is displayed Check connection between If Error is displayed Check connection between computer jig and se...

Page 11: ...64 2 24 44 40 0 1 16 61 12 29 9 1 14 41 18 84 4 55298 55298 51202 51202 273 273 4 42 2L LB B5 55 50 00 0 S SF F L LG GD D 2 23 3 2 24 44 40 0 1 16 61 12 29 9 1 14 41 18 84 4 5 55 52 29 98 8 2 27 73 3 4 49 9L LB B5 55 50 00 0 S SF F L LG GD D 2 24 44 40 0 1 16 61 12 29 9 1 14 41 18 84 4 5 55 52 29 98 8 2 27 73 3 32LB560B SA 32LB560B SA 32LB561B SC 32LB561B SC LGD LGD CSOT CSOT Sharp Sharp 4 4 14340...

Page 12: ... 0 2 28 85 5 2 29 93 3 3 31 13 3 3 32 29 9 1 1 0 0 2 2 2 28 81 1 2 28 85 5 2 29 95 5 3 30 08 8 3 32 23 3 3 34 44 4 2 2 3 3 5 5 2 28 80 0 2 28 84 4 2 29 94 4 3 30 07 7 3 32 22 2 3 34 43 3 3 3 6 6 9 9 2 27 79 9 2 28 82 2 2 29 93 3 3 30 05 5 3 32 21 1 3 34 41 1 Connecting picture of the measuring instrument Connecting picture of the measuring instrument On Automatic control On Automatic control Insid...

Page 13: ... from the target value x y 1 1 x y x y targe target t i Decrease the R G i Decrease the R G 2 2 x y x y targe target t i First decrease the B gain i First decrease the B gain ii Decrease the one of the others ii Decrease the one of the others 3 3 x x target y target y target target i First decrease B so make y a little more than the target i First decrease B so make y a little more than the target...

Page 14: ...oad After enter Service Mode by pushing ADJ key After enter Service Mode by pushing ADJ key Enter EDID D L mode Enter EDID D L mode Enter START by pushing OK key Enter START by pushing OK key Caution Caution Use the proper signal cable for EDID Download Use the proper signal cable for EDID Download Analog EDID Pin3 exists Analog EDID Pin3 exists Digital EDID Pin3 exists Digital EDID Pin3 exists Ca...

Page 15: ...n condition 4 6 2 GND HI POT auto check 4 6 2 GND HI POT auto check 1 Pallet moves in the station POWER CORD AV CORD is 1 Pallet moves in the station POWER CORD AV CORD is tightly inserted tightly inserted 2 Connect 2 Connect the AV JACK T the AV JACK Tester ester 3 Controller GWS103 4 on 3 Controller GWS103 4 on 4 GND Test Auto 4 GND Test Auto If Test is failed Buzzer operates If Test is failed B...

Page 16: ...UPPORT HDMI1 4 HDMI1 4 HDMI mode NO 872 pattern No 83 HDMI mode NO 872 pattern No 83 1 Please input 3D test pattern like below HDMI mode NO 1 Please input 3D test pattern like below HDMI mode NO 872 pattern No 83 872 pattern No 83 2 When 3D OSD appear automatically then select OK 2 When 3D OSD appear automatically then select OK button button ...

Page 17: ... S C C L L S S D D A A N N A A N N D D F F L L A A S S H H 1 1 G G b b i i t t I I C C 1 1 0 0 2 2 P P C C M M _ _ A A 0 0 7 7 D D D D R R 3 3 S S D D R R A A M M 2 2 G G b b i i t t I I C C 1 1 2 2 0 0 1 1 A A M M D D Q Q L L 0 0 7 7 A A M M D D Q Q U U 0 0 7 7 R R X X A A 0 0 R R X X A A 4 4 R R X X A A C C K K R R X X B B 0 0 R R X X B B 4 4 R R X X B B C C K K K K M M a a i i n n S S O O C C M...

Page 18: ...hat these special safety parts should be replaced with the same components as 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 recommended in this manual to prevent X RADIATION Shock Fire or other Hazards Do not modify the original design without permission of Do not modify t...

Page 19: ...I_TS_DATA 4 CI_TS_DATA 4 SCART1_Lout SCART1_Lout PCM_REG PCM_REG HP_ROUT HP_ROUT P PC CM M_ _I IO OW WR R C CI I_ _T TS S_ _D DA AT TA A 1 1 PCM_RST PCM_RST PCM_A 12 PCM_A 12 CI_TS_VAL CI_TS_VAL CI_TS_DATA 3 CI_TS_DATA 3 PCM_WAIT PCM_WAIT SCART1_Rout SCART1_Rout CI_TS_DATA 6 CI_TS_DATA 6 PCM_D 4 PCM_D 4 PCM_A 8 PCM_A 8 DTV MNT_VOUT DTV MNT_VOUT PCM_D 7 PCM_D 7 PCM_OE PCM_OE SIDE_HP_MUTE SIDE_HP_MU...

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Page 21: ...NTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE THE CRITICAL CRITICAL COMPONENTS COMPONENTS IN T IN THE HE SYMBOL SYMBOL MARK O MARK OF THE F THE SCHEMETIC SCHEMETIC 13 04 30 13 04 30 USB_S1 USB_S1 7 7 L14_M1A L14_M1A JK700 JK700 3 3 A A U U 0 0 4 4 S S 3 3 0 0 5 5 Z Z C C L L G G 1 1 2 2 3 3 4 4 5 5 D700 D700 RCLAMP0502BA RCLAMP0502BA OPT OPT SIDE_USB1_DM SIDE_USB1_DM SIDE_USB1_DP SI...

Page 22: ......

Page 23: ...ECIFIED PARTS BE USED FOR THE THE CRITICAL CRITICAL COMPONENTS COMPONENTS IN T IN THE HE SYMBOL SYMBOL MARK O MARK OF THE F THE SCHEMETIC SCHEMETIC SPDIF SPDIF 2013 10 29 2013 10 29 10 10 NC5_L14 NC5_L14 3 3V_Normal 3 3V_Normal SPDIF_OUT SPDIF_OUT JK1001 JK1001 JST1223 001 JST1223 001 SPDIF_OPTIC SPDIF_OPTIC 1 1 GND GND 2 2 VCC VCC 3 3 VINPUT VINPUT 4 4 F F I I X X _ _ P P O O L L E E C1001 C1001 ...

Page 24: ...OM_SDA URSA VCOM_SDA URSA VCOM_SCL URSA VCOM_SCL P1101 P1101 10031HR 30 10031HR 30 MO_HD MO_HD 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 10 10 11 11 12 12 13 13 14 14 15 15 16 16 17 17 18 18 19 19 20 20 21 21 22 22 23 23 24 24 25 25 26 26 27 27 28 28 29 29 30 30 31 31 RXB1 RXB1 RXB0 RXB0 RXA4 RXA4 RXA1 RXA1 Pol change Pol change RXB4 RXB4 RXACK RXACK RXBCK RXBCK RXA0 RXA0 RXA2 RXA2 LVDS NON EU LVDS NON ...

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Page 26: ...04 29 13 13 NC5_S7LR M1A NC5_S7LR M1A SPI_SCK SPI_SCK 3 5V_ST 3 5V_ST 3 5V_ST 3 5V_ST C1300 C1300 0 1uF 0 1uF R1301 R1301 4 7K 4 7K OPT OPT SPI_CS SPI_CS SPI_SDO SPI_SDO IC1300 IC1300 MX25L8006EM2I 12G MX25L8006EM2I 12G SPI_FLASH_MACRONIX SPI_FLASH_MACRONIX 3 3 WP WP 2 2 SO SIO1 SO SIO1 4 4 GND GND 1 1 CS CS 5 5 SI SIO0 SI SIO0 6 6 SCLK SCLK 7 7 HOLD HOLD 8 8 VCC VCC R1302 R1302 33 33 R1300 R1300 ...

Page 27: ... DVB_T2 3 3V_TU 3 3V_TU 1 2V_DEMOD 1 2V_DEMOD T T U U _ _ G G N N D D _ _ A A 1 2V_DEMOD 1 2V_DEMOD R1414 R1414 22K 22K 1 1 DVB_T2 DVB_T2 C1421 C1421 0 1uF 0 1uF 16V 16V DVB_T2 DVB_T2 3 3V_TU 3 3V_TU RF_SWITCH_CTL RF_SWITCH_CTL R1407 R1407 1K 1K 3 3V_TU 3 3V_TU R1405 R1405 100 100 TU_SIF TU_SIF IF_AGC_SEL IF_AGC_SEL TUNER_RESET TUNER_RESET TU_CVBS TU_CVBS L1401 L1401 UBW2012 121F UBW2012 121F L140...

Page 28: ... COMP_Pb_ZENER_KEC ZD1701 1 ZD1701 1 COMP_Pr_ZENER_KEC COMP_Pr_ZENER_KEC ZD1700 1 ZD1700 1 COMP_Pr_ZENER_KEC COMP_Pr_ZENER_KEC ZD1705 1 ZD1705 1 COMP_Y_ZENER_KEC COMP_Y_ZENER_KEC ZD1704 1 ZD1704 1 COMP_Y_ZENER_KEC COMP_Y_ZENER_KEC R1707 R1707 75 75 1 1 1608 1608 R1702 R1702 75 75 1 1 AV2 AV2 1608 1608 DTV MNT_VOUT DTV MNT_VOUT R1723 R1723 75 75 C C V V B B S S _ _ O O U U T T _ _ T T E E S S T T R...

Page 29: ...3 04 30 2013 04 30 40 40 L14_S7LR M1A L14_S7LR M1A PM_RXD PM_RXD 3 5V_ST 3 5V_ST R4001 R4001 100 100 R4000 R4000 100 100 P4000 P4000 12507WS 04L 12507WS 04L RS232C_DEBUG_4P RS232C_DEBUG_4P 1 1 VCC VCC 2 2 PM_RXD PM_RXD 3 3 GND GND 4 4 RM_TXD RM_TXD 5 5 GND GND PM_TXD PM_TXD J J P P _ _ G G N N D D 3 3 RGB_DDC_SCL RGB_DDC_SCL J J P P _ _ G G N N D D 4 4 RGB_DDC_SDA RGB_DDC_SDA J J P P _ _ G G N N D...

Page 30: ... 0 8 0 8 1 0 0 1 0 0 Digital Eye Digital Eye R4600 R4600 3 3K 3 3K R4607 R4607 1K 1K Digital Eye Digital Eye C4603 C4603 0 1uF 0 1uF 16V 16V OPT OPT KEY1 KEY1 3 5V_ST 3 5V_ST R4601 R4601 100 100 C4601 C4601 1000pF 1000pF 50V 50V KEY2 KEY2 VA4600 VA4600 LED_R_Zener LED_R_Zener R4604 R4604 10K 10K 1 1 C4604 C4604 100pF 100pF 50V 50V R4605 R4605 1K 1K Digital Eye Digital Eye SENSOR_SDA SENSOR_SDA 3 3...

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Page 33: ... C C _ _ 1 1 6 6 S S S S T T I I M M E E R R 7 7 N N C C _ _ 2 2 8 8 P P B B T T L L 9 9 A A V V S S S S 1 1 0 0 P P L L L L _ _ F F L L T T M M 1 1 1 1 P P L L L L _ _ F F L L T T P P 1 1 2 2 V V R R _ _ A A N N A A 13 13 AVDD AVDD 14 14 A_SEL_FAULT A_SEL_FAULT 15 15 MCLK MCLK 16 16 OSC_RES OSC_RES 17 17 DVSSO DVSSO 18 18 VR_DIG VR_DIG 19 19 PDN PDN 20 20 LRCLK LRCLK 21 21 SCLK SCLK 22 22 SDIN SD...

Page 34: ...OR ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE THE CRITICAL CRITICAL COMPONENTS COMPONENTS IN T IN THE HE SYMBOL SYMBOL MARK O MARK OF THE F THE SCHEMETIC SCHEMETIC MHL_SW_AND MHL_SW_AND 2013 09 01 2013 09 01 L14_M1A L14_M1A 58 58 MHL_5V_EN MHL_5V_EN MHL_OCP_EN MHL_OCP_EN MHL_CD_SENSE MHL_CD_SENSE 3 3V_Normal 3 3V_Normal IC5801 IC5801 74LVC1G08GW 74LVC1G08GW MHL_SW_AND_GATE MH...

Page 35: ......

Page 36: ... 6 B Power error B Power error No No power power 7 7 7 7 Off when on off while viewing power auto Off when on off while viewing power auto on off on off 8 8 8 8 C Audio error C Audio error No No audio Normal audio Normal video video 9 9 9 9 Wrecked Wrecked audio discontinuation noise audio discontinuation noise 10 10 10 10 D Function error D Function error Remote Remote control control Local Local...

Page 37: ...ways check record S W Ver Always check record S W Version and White sion and White Balance value before replacing the Main Board Balance value before replacing the Main Board Replace Main Board Replace Main Board Re enter White Balance value Re enter White Balance value Precaution Precaution Established Established date date Standard Repair Process Standard Repair Process Revised date Revised date...

Page 38: ...heck and Check and replace replace MAIN B D MAIN B D Y Y Replace Power Replace Power Board and repair Board and repair parts parts N N End End Standard Repair Process Standard Repair Process A Video error A Video error No video No audio No video No audio A4 A4 Established Established date date Revised date Revised date 2 14 2 14 LCD TV LCD TV Error Error symptom symptom 2012 01 14 2012 01 14 ...

Page 39: ...B D Main B D Check Check Tuner soldering Tuner soldering Normal Normal Picture Picture Y Y N N Y Y Close Close Normal Normal Picture Picture Y Y Close Close By using Digital signal level meter By using Digital signal level meter By using Diagnostics menu on OSD By using Diagnostics menu on OSD Menu Set up Support Signal Test Menu Set up Support Signal Test Signal strength Normal over 50 Signal str...

Page 40: ...oblem or Check whether other equipments have problem or not not By connecting RF Cable at other equipment By connecting RF Cable at other equipment Set Set Top Box Different maker TV etc Top Box Different maker TV etc A6 A6 Standard Repair Process Standard Repair Process Established Established date date Revised date Revised date 4 14 4 14 LCD TV LCD TV Error Error symptom symptom 2012 01 14 2012 ...

Page 41: ...rnal external device and device and cable cable Y Y External device External device Cable Cable normal normal RGB RGB HDMI DVI HDMI DVI error error Check external Check external device and device and cable cable Replace Main B D Replace Main B D Replace Main B D Replace Main B D N N N N A Video error A Video error Color error Color error A7 A7 N N Y Y End End Replace module Replace module Request ...

Page 42: ...by connecting Jig pattern connecting Jig pattern Generator Set top Box etc Generator Set top Box etc N N Y Y Replace Replace Main B D Main B D Screen Screen normal normal Check screen Check screen condition by input condition by input External Input External Input Component Component RGB RGB HDMI DVI HDMI DVI Request repair for Request repair for external device external device Component Component...

Page 43: ...Measure voltage of each output of Power B D Measure voltage of each output of Power B D N N Y Y Normal Normal voltage voltage Replace Main B D Replace Main B D Y Y OK OK Replace Main B D Replace Main B D N N Y Y Normal Normal Check ST BY 3 5V Check ST BY 3 5V Replace Power B D Replace Power B D N N Y Y Normal Normal voltage voltage Replace Power Replace Power B D B D Y Y A11 A11 A12 A12 A13 A13 A4...

Page 44: ...r Power off off by by REMOTE REMOTE CONTROL CONTROL POWEROFF_OFFTIMER POWEROFF_OFFTIMER Power Power off off by by OFF OFF TIMER TIMER POWEROFF_SLEEPTIMER POWEROFF_SLEEPTIMER Power Power off off by by SLEEP SLEEP TIMER TIMER POWEROFF_INSTOP POWEROFF_INSTOP Power Power off off by by INSTOP INSTOP KEY KEY POWEROFF_AUTOOFF POWEROFF_AUTOOFF Power Power off off by by AUTO AUTO OFF OFF POWEROFF_ONTIMER P...

Page 45: ...ir parts Replace Power Board and repair parts Check Speaker Check Speaker disconnection disconnection N N Y Y Replace Speaker Replace Speaker Replace MAIN Board Replace MAIN Board End End C Audio error C Audio error No audio Normal video No audio Normal video A15 A16 A15 A16 Disconnection Disconnection Established Established date date Revised date Revised date 9 14 9 14 LCD TV LCD TV Error Error ...

Page 46: ...al Input Connect and check Connect and check other external device other external device N N Y Y Normal Normal audio audio Check and fix external device Check and fix external device Replace Power B D Replace Power B D N N Y Y Normal Normal voltage voltage Check input Check input signal signal RF RF External Input External Input signal signal Signal Signal normal normal When RF signal is not When ...

Page 47: ...ck Replace Baterry of R C Baterry of R C Check Repair Check Repair Cable connection Cable connection Connector solder Connector solder Normal Normal operating operating Check B 3 5V Check B 3 5V On Main B D On Main B D A17 A17 Normal Normal Voltage Voltage Close Close N N N N Check 3 5v on Power B D Check 3 5v on Power B D Replace Power B D or Replace Power B D or Replace Main B D Replace Main B D...

Page 48: ...ix external device cable external device cable RGB HDMI RGB HDMI DVI Optical DVI Optical Recognition error Recognition error Replace Main B D Replace Main B D Replace Main B D Replace Main B D Fix in Fix in accordance accordance with technical with technical information information D Function error D Function error External device recognition error External device recognition error Established Est...

Page 49: ...then proceed as shown in the solution proceed as shown in the solution manual manual For models without any fix information provide For models without any fix information provide the description the description OR OR Mechanical noise is a natural Mechanical noise is a natural phenomenon and apply the phenomenon and apply the 1st level 1st level description When the customer does not description Wh...

Page 50: ...ace remote controller Replace remote controller Remote Remote controller controller damage damage Stand Stand dent dent Replace stand Replace stand F Exterior defect F Exterior defect Exterior defect Exterior defect Established Established date date Revised date Revised date 14 14 14 14 LCD TV LCD TV Error Error symptom symptom Standard Repair Process Standard Repair Process 2012 01 14 2012 01 14 ...

Page 51: ...agram diagram A7 A7 10 10 11 11 Check Check Link Link Cable Cable LVDS LVDS reconnection reconnection condition condition A8 A8 A9 A9 12 12 Adjustment Adjustment Test Test pattern pattern ADJ ADJ Key Key A10 A10 13 13 A Video A Video error_Vertical Horizon error_Vertical Horizontal bar tal bar residual image light spot residual image light spot LCD LCD TV TV connectio connection n diagram diagram ...

Page 52: ... POWER POWER OFF OFF MODE MODE checking checking method method A14 A14 28 28 C Audio error_No audio Normal video C Audio error_No audio Normal video Checking method in menu when there is no Checking method in menu when there is no audio audio A15 A15 29 29 Voltage and speaker checking method when Voltage and speaker checking method when there is no audio there is no audio A16 A16 30 30 C Audio err...

Page 53: ...ith naked eye A Video error_No video Normal audio A Video error_No video Normal audio ALL MODELS ALL MODELS A1 A1 Established Established date date Revised Revised date date Error Error symptom symptom Content Content LCD TV LCD TV 2012 01 14 2012 01 14 Power On disjoint back case check lighting at any point Power On disjoint back case check lighting at any point ...

Page 54: ...stablished date date Revised Revised date date Error Error symptom symptom Content Content LCD TV LCD TV 2012 11 17 2012 11 17 Measure LED applying to LED Measure LED applying to LED Back Light from Power Board Back Light from Power Board Output LED from Power Board supply to LED Output LED from Power Board supply to LED B L B L Check Pin contacting statement and connection statement Check Pin con...

Page 55: ...tom symptom Content Content LCD TV LCD TV Entry method Entry method 1 Press the ADJ button on the remote controller for adjustment 1 Press the ADJ button on the remote controller for adjustment 2 Enter into White Balance of item 8 2 Enter into White Balance of item 8 3 After recording the R 3 After recording the R G B GAIN Cut value G B GAIN Cut value of Color T of Color Temp Cool Medium Warm emp ...

Page 56: ...date date Revised Revised date date Error Error symptom symptom Content Content LCD TV LCD TV Check the DC 24V 12V 3 5V Check the DC 24V 12V 3 5V 2012 11 17 2012 11 17 Power Board Main Board Power Board Main Board 1 PWR_ON 2 DRV_ON 1 PWR_ON 2 DRV_ON 3 3 3 5V 3 5V 4 4 PDIM1 PDIM1 5 3 5V 6 3 5V 5 3 5V 6 3 5V 7 7 GND GND 8 8 PDIM2 PDIM2 9 9 24V 10 24V 10 24V 24V 11 GND 12 GND 11 GND 12 GND 13 12V 14 ...

Page 57: ...l Standard Repair Process Detail Technical Manual TUNER input signal strength checking method TUNER input signal strength checking method A Video error_Video error video lag stop A Video error_Video error video lag stop ALL MODELS ALL MODELS A5 A5 Established Established date date Revised Revised date date Error Error symptom symptom Content Content LCD TV LCD TV 2012 01 14 2012 01 14 ...

Page 58: ...ror video lag stop 1 Checking method for remote controller for adjustment 1 Checking method for remote controller for adjustment Press the IN START with the remote Press the IN START with the remote controller for adjustment controller for adjustment Version Version ALL MODELS ALL MODELS A6 A6 Established Established date date Revised Revised date date Error Error symptom symptom Content Content L...

Page 59: ...rror _Vertical Horizontal bar residual image light spot residual image light spot As the part connecting to the external input check the As the part connecting to the external input check the screen condition by signal screen condition by signal A7 A7 Established Established date date Revised Revised date date Error Error symptom symptom Content Content LCD TV LCD TV ALL MODELS ALL MODELS 2012 11 ...

Page 60: ...al Standard Repair Process Detail Technical Manual Check and replace Link Cable LVDS and contact Check and replace Link Cable LVDS and contact condition condition A Video error_Color error A Video error_Color error ALL MODELS ALL MODELS A8 A9 A8 A9 Established Established date date Revised Revised date date Error Error symptom symptom Content Content LCD TV LCD TV 2012 01 14 2012 01 14 ...

Page 61: ...erns using the types of patterns using the ADJ Key ADJ Key Checking Checking item item 1 1 Defective Defective pixel pixel 2 2 Residual Residual image image 3 3 MODULE MODULE error error ADD BAR SCAN ADD BAR SCAN BAR BAR 4 Video error Classification of MODULE or Main B D 4 Video error Classification of MODULE or Main B D A10 A10 Established Established date date Revised Revised date date Error Err...

Page 62: ...older defect CNT Broken Solder defect CNT Broken Solder defect CNT Broken Solder defect CNT Broken Solder defect CNT Broken Solder defect CNT Broken Solder defect CNT Broken Abnormal Power Section Abnormal Power Section Solder defect Short Crack Solder defect Short Crack Abnormal Abnormal Power Power Section Section Solder Solder defect defect Short Crack Short Crack Appendix Exchange T Con Board ...

Page 63: ...bnormal Power Section Abnormal Power Section Solder defect Short Crack Solder defect Short Crack Fuse Open Abnormal power section Fuse Open Abnormal power section Noise Noise GRADATION GRADATION GRADATION GRADATION Abnormal Display Abnormal Display Appendix Exchange T Con Board 2 Appendix Exchange T Con Board 2 ...

Page 64: ...29 97 29 97 Appendix Exchange Appendix Exchange PSU LED driver PSU LED driver No Light No Light Dim Light Dim Light Dim Light Dim Light Dim Light Dim Light No picture Sound Ok No picture Sound Ok ...

Page 65: ...Mura Light leakage Press damage Press damage Crosstalk Crosstalk Crosstalk Crosstalk Press damage Press damage Panel Mura Light leakage Panel Mura Light leakage Press damage Press damage Un repairable Cases Un repairable Cases In this case please In this case please exchange the module exchange the module ...

Page 66: ...ertical Block Vertical Block Source TAB IC Defect Source TAB IC Defect Horizontal Block Horizontal Block Gate TAB IC Defect Gate TAB IC Defect Horizontal line Horizontal line Gate TAB IC Defect Gate TAB IC Defect Gate TAB IC Defect Gate TAB IC Defect Horizontal Block Horizontal Block Gate TAB IC Defect Gate TAB IC Defect Appendix Exchange the Module 2 Appendix Exchange the Module 2 Un repairable C...

Page 67: ...Power error _No power B Power error _No power A11 A11 Established Established date date Revised Revised date date Error Error symptom symptom Content Content LCD TV LCD TV ST BY condition Red ST BY condition Red Front LED control Front LED control Menu Menu Option Option Power Indicator Power Indicator Standby light ON Standby light ON 2012 11 17 2012 11 17 ...

Page 68: ...eck power input voltage a input voltage and ST BY nd ST BY 3 5V 3 5V B Power error _No power B Power error _No power A12 A12 Established Established date date Revised Revised date date Error Error symptom symptom Content Content LCD TV LCD TV Check the DC 20V 24V 12V 3 5V Check the DC 20V 24V 12V 3 5V 2012 11 17 2012 11 17 ...

Page 69: ... power is ON Checking method when power is ON B Power error _No power B Power error _No power A13 A13 Established Established date date Revised Revised date date Error Error symptom symptom Content Content LCD TV LCD TV Check power on Pin 1 pin is high about 3 3V Check power on Pin 1 pin is high about 3 3V 2012 11 17 2012 11 17 ...

Page 70: ... adjustment item 3 Standard Repair Process Detail Technical Manual Standard Repair Process Detail Technical Manual POWER OFF MODE checking method POWER OFF MODE checking method B Power error B Power error _Off when on off whiling viewing _Off when on off whiling viewing Low models Low models A14 A14 Established Established date date Revised Revised date date Error Error symptom symptom Content Con...

Page 71: ...3 Select TV Speaker from Off to On Standard Repair Process Detail Technical Manual Standard Repair Process Detail Technical Manual Checking method in menu when there is no Checking method in menu when there is no audio audio C Audio error_No audio Normal video C Audio error_No audio Normal video LA613x LA613x A15 A15 Established Established date date Revised Revised date date Error Error symptom s...

Page 72: ... you hear the Chik Chik sound when you touch the 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 GND and output terminal the speaker is normal Standard Repair Process Detail Technical Manual Standard Repair Process Detail Technical Manual Voltage and speaker checking method Voltage and speaker check...

Page 73: ...ester needle moves slowly and defe ester needle moves slowly and defective when it does ctive when it does not move at all not move at all Standard Repair Process Detail Technical Manual Standard Repair Process Detail Technical Manual Remote controller operation checking method Remote controller operation checking method D Function error_ No response in remote D Function error_ No response in remo...

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Summary of Contents for 32LB550B

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LG 32LB550B, Service Manual, Page: 46 / 73

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Summary of Contents for 32LB550B

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