LG 22LG3100 Service Manual Download Page 66

Page: 66 / 67

LGE Internal Use Only

Check Procedure at No Sound

①

24V connector contacting statement of Main Board.

②

Measure 24V of input voltage supplied by Power Board (If there is no input voltage, remove connector -> check

it out)

③

Put SPK terminal into tester RX1 -> when touching GND and output terminal, if make Cheuk

Cheuk sound, it is OK.

Standard Repair Process Detail Technical Manual

A22

Established

date

Revised

date

Error

symptom

Content

LCD TV

Voltage and SPK Check Method at Sound Defect

C. Audio error_Sound distortion/cut

A22

2009. 7 .30

①

②

③

Summary of Contents for 22LG3100

Page 1: ...EAD THE SAFETY PRECAUTIONS IN THIS MANUAL CHASSIS LD91M MODEL 22LG3100 22LG3100 ZA North Latin America http aic lgservice com Europe Africa http eic lgservice com Asia Oceania http biz lgservice com Internal Use Only Printed in Korea P NO MFL50326829 0907 REV00 ...

Page 2: ...ernal Use Only Copyright 2009 LG Electronics Inc All right reserved Only for training and service purposes CONTENTS CONTENTS 2 PRODUCT SAFETY 3 SPECIFICATION 6 ADJUSTMENT INSTRUCTION 9 EXPLODED VIEW 14 SVC SHEET ...

Page 3: ...d 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 metallic parts such as antenna terminals phone jacks etc If the exposed metallic part has a return path...

Page 4: ... on your body by touching a known earth ground Alternatively obtain and wear a commercially available discharging wrist strap device which should be removed to prevent potential shock reasons prior to applying power to the unit under test 2 After removing an electrical assembly equipped with ES devices place the assembly on a conductive surface such as aluminum foil to prevent electrostatic charge...

Page 5: ...the solder joints of the two original leads If they are not shiny reheat them and if necessary apply additional solder Fuse and Conventional Resistor Removal Replacement 1 Clip each fuse or resistor lead at top of the circuit board hollow stake 2 Securely crimp the leads of replacement component around notch at stake top 3 Solder the connections CAUTION Maintain original spacing between the replac...

Page 6: ...s marked by models 4 Specification and performance of each parts are followed each drawing and specification by part number in accordance with BOM 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 CE IEC EN60065 EMC CE IEC No Item Specification Remark 1 Screen Device 22 wide colo...

Page 7: ...m2 250 300 Variation 1 3 MAX MIN 3 Contrast Ratio CR 700 1000 4 CIE Color Coordinates White Wx 0 313 Wy 0 329 Typ RED Xr 0 649 0 03 Yr 0 335 Green Xg 0 283 Yg 0 605 Blue Xb 0 151 Yb 0 073 6 Component Video Input Y CB PB CR PR No Specification Remark Resolution H freq kHz V freq Hz 1 720x480 15 73 60 00 SDTV DVD 480i 2 720x480 15 63 59 94 SDTV DVD 480i 3 720x480 31 47 59 94 480p 4 720x480 31 50 60 ...

Page 8: ... 1 720 400 31 468 70 08 28 321 HDCP 2 640 480 31 469 59 94 25 17 VESA HDCP 3 800 600 37 879 60 31 40 00 VESA HDCP 4 1024 768 48 363 60 00 65 00 VESA XGA HDCP 5 1280 768 47 78 59 87 79 5 WXGA HDCP 6 1360 768 47 72 59 8 84 75 WXGA HDCP 7 1440 900 55 5 59 90 88 750 WSXGA 19LG3100 ZA 8 1400 1050 64 744 59 948 101 00 WSXGA 22LG3100 ZA 9 1680 1050 65 16 59 94 147 00 WSXGA 22LG3100 ZA 10 1280 1024 63 595...

Page 9: ...k OK message If Error is displayed Check connection between computer jig and set 3 Click Read tab and then load download file XXXX bin by clicking Read 4 Click Connect tab If Can t is displayed check connection between computer jig and set 5 Click Auto tab and set as below 6 Click Run 7 After downloading check OK message USB DOWNLOAD 1 Put the USB Stick to the USB socket 2 Automatically detecting ...

Page 10: ...g ADJ key Enter Internal ADC mode by pushing G key at 5 ADC Calibration Caution Using power on button of the Adjustment R C power on TV ADC Calibration Protocol RS232 Adjust Sequence aa 00 00 Enter Adjust Mode xb 00 40 Component1 Input 480i ad 00 10 Adjust 480i Comp1 xb 00 60 RGB Input 1024 768 ad 00 10 Adjust 1024 768 RGB aa 00 90 End Adjust mode Required equipment Adjustment R C 3 2 Function Che...

Page 11: ...ol option and Area option value with its BOM if it is correctly same then unplug the AC cable If it is not same then correct it same with BOM and unplug AC cable For correct it to the model s module from factory Jig model Push the IN STOP key after completing the function inspection And Mechanical power switch must be set On 4 2 DDC EDID Write RGB 128Byte Connect D sub Signal Cable to D sub Jack W...

Page 12: ...ownload The use of a internal pattern 0 1 2 3 4 5 6 7 8 9 A B C D E F 00 00 FF FF FF FF FF FF 00 1E 6D ⓐ ⓑ 10 ⓒ 01 03 68 73 41 78 0A CF 74 A3 57 4C B0 23 20 09 48 4C A1 08 00 81 80 61 40 45 40 31 40 01 01 30 01 01 01 01 01 01 6C 39 90 40 62 1A 25 40 68 B8 40 16 00 D9 28 11 00 00 1E 01 1D 00 72 51 D0 1E 20 50 6E 28 55 00 7E 8A 42 00 00 1E 00 00 00 FD 00 3A 60 3E 1E 53 10 00 0A 20 20 20 20 20 20 ⓓ 7...

Page 13: ...t write 7mode data write Vtotal V_Frequency Sync_Polarity Htotal Hstart Vstart 0 Phase Data write Model Name and Serial Number write in EEPROM 5 3 Method notice 1 Serial number D L is using of scan equipment 2 Setting of scan equipment operated by Manufacturing Technology Group 3 Serial number D L must be conformed when it is produced in production line because serial number D L is mandatory by D ...

Page 14: ...l 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 IM...

Page 15: ...L R1504 4 7K FE_TUNER_SCL AI13 10 I9 R1505 4 7K FE_TUNER_SDA AI13 10 I9 C111 20pF C112 20pF 3 3V R1507 1 2K R1506 1 2K R1550 100 POWER_DET 3 3V_ST R1544 100 PWM0 PWM2 PWM_DIM A_DIM C1500 1uF OPT C1501 2 2uF OPT 24V 15V 12V 15V PWM2 11 AE17 PWM0 DBG_TX POWER_DET 3 3V_TUNER R146 0 R116 0 R173 0 R168 0 R100 0 C114 0 1uF C100 0 1uF R150 100 OPT R156 100 R147 100 R157 100 R166 100 R148 100 R160 100 R15...

Page 16: ...0 1uF C2005 0 1uF C2003 0 1uF C296 0 1uF C2041 0 1uF C265 0 1uF C2036 0 1uF C251 0 1uF C2001 0 1uF C289 0 1uF C253 0 1uF C2039 0 1uF C283 0 1uF C243 0 1uF C2000 0 1uF C294 0 1uF C276 0 1uF C242 0 1uF C2040 0 1uF C277 0 1uF C254 0 1uF C291 0 1uF C2032 0 1uF C2033 0 1uF C2037 0 1uF C266 0 1uF C250 0 1uF C244 0 1uF C2030 0 1uF C262 0 1uF C293 0 1uF C2029 0 1uF C273 0 1uF C256 0 1uF C279 0 1uF C271 0 ...

Page 17: ...1 8V_DDR 1 8V_DDR 1 8V_DDR C324 10uF C303 10uF IC301 H5PS5162FFR S6C J2 VREF J8 CK H2 VSSQ2 B7 UDQS N8 A4 P8 A8 L1 NC4 L2 BA0 R8 NC3 K7 RAS F8 VSSQ3 F3 LDM P3 A9 M3 A1 N3 A5 K8 CK R3 NC5 L3 BA1 J7 VSSDL L7 CAS F2 VSSQ4 B3 UDM M2 A10 AP K2 CKE R7 NC6 M7 A2 N7 A6 M8 A0 J1 VDDL K3 WE E8 LDQS P7 A11 K9 ODT A2 NC1 N2 A3 P2 A7 H8 VSSQ1 F7 LDQS A8 UDQS R2 A12 L8 CS E2 NC2 E7 VSSQ5 D8 VSSQ6 D2 VSSQ7 A7 VS...

Page 18: ...3010L_AMODIODE D417 30V ADUC30S03010L_AMODIODE D423 30V ADUC30S03010L_AMODIODE OPT D424 30V ADUC30S03010L_AMODIODE OPT D406 30V AMOTECH D407 30V AMOTECH D404 5 6V AMOTECH D405 5 6V AMOTECH D410 5 6V AMOTECH D411 5 6V AMOTECH D412 5 6V AMOTECH D418 5 6V ADMC5M03200L_AMODIODE OPT D419 5 6V ADMC5M03200L_AMODIODE OPT D420 5 6V ADMC5M03200L_AMODIODE OPT D421 5 6V OPT AMOTECH D422 5 6V OPT AMOTECH ZD403...

Page 19: ...ORD GND CI_ADDR 11 PCM_RST PCM_IRQA R500 47 5V_GENERAL CI_ADDR 12 5V_GENERAL CI_ADDR 14 CI_CD2 PCM_A 1 CI_TS_CLK PCM_A 8 CI_OE CI_MISTRT D14 CI_MDI 7 CI_MDI 1 PCM_WE CI_TS_DATA 4 C501 0 1uF 16V GND CI_TS_DATA 0 FE_TS_CLK CI_MCLKI REG PCM_A 4 CI_MISTRT PCM_A 9 FE_TS_SYN PCM_A 13 PCM_IOWR R509 10K PCM_OE CI_ADDR 5 CI_MDI 7 PCM_A 5 GND CI_TS_DATA 3 R517 10K CI_MIVAL_ERR GND PCM_REG CI_ADDR 3 CI_MDI 5...

Page 20: ...1 EDID_WP JP607 5V_HDMI_1 HPD1 Q601 2SC3052 E B C 5V_HDMI_2 HPD2 Q602 2SC3052 E B C 5V_HDMI_3 HPD3 Q603 2SC3052 E B C IC601 CAT24C02WI GT3 3 A2 2 A1 4 VSS 1 A0 5 SDA 6 SCL 7 WP 8 VCC IC600 CAT24C02WI GT3 3 A2 2 A1 4 VSS 1 A0 5 SDA 6 SCL 7 WP 8 VCC IC602 CAT24C02WI GT3 3 A2 2 A1 4 VSS 1 A0 5 SDA 6 SCL 7 WP 8 VCC R607 0 GND 3 3V_ST HDMI_CEC Q600 SSM6N15FU 3 DRAIN2 2 GATE1 1 SOURCE1 4 SOURCE2 5 GATE2...

Page 21: ...21SN1D C712 33pF 50V C714 33pF 50V R710 100 R709 100 R726 12 R727 12 R725 12 R728 12 R716 12 R705 12 R713 12 R719 12 C725 10uF 35V C736 10uF 35V 5V_EARPHONE Q705 2SC3052 E B C R740 0 R703 0 0 1uF C709 C710 0 1uF 16V C702 0 1uF 16V 0 1uF C715 16V 0 1uF C706 16V R704 100 C741 1000pF 50V C707 1000pF 50V C708 1000pF 50V C743 1000pF 50V C742 1000pF 50V C744 1000pF 50V C705 100pF 50V R700 10K R724 10K R...

Page 22: ...C T112 1 2 3 3 3V_ST R807 33K OPT Q800 2SC3052 E B C POWER_ON OFF1 1 8V_DDR R810 0 OPT R806 0 3 3V_TUNER 5V_GENERAL IC809 AP1117E33G 13 2 OUT 3 IN 1 ADJ GND R808 0 OPT R845 0 21 ERROR R875 0 21 GND R851 0 21 ADIM R812 0 22 GND R855 0 22 PDIM R858 0 20 INV_CTL 0 R841 22 ERROR R870 0 OPT C848 0 01uF 25V C841 0 01uF 25V C816 0 1uF 16V C817 0 1uF 16V 0 1uF C818 16V OPT C820 0 1uF 16V C865 0 1uF 16V C8...

Page 23: ...TV_R_OUT 002 P7 DTV MNT_R_OUT DTV MNT_L_OUT R1179 680 19 22 C1126 0 1uF 50V R1185 0 R1187 0 R1182 0 0 R1117 R1105 0 0 R1133 R1134 0 C1105 0 1uF 16V C1113 0 1uF 16V C1132 0 1uF C1131 0 1uF R1147 10K R1108 10K R1121 10K R1128 10K R1154 10K R1153 10K R1110 10K R1178 10K R1148 10K R1127 12K R1111 12K R1112 12K R1129 12K R1186 12K 26 52 R1167 15K R1175 15K R1184 15K R1181 1K R1180 1K R1126 1K R1159 1K ...

Page 24: ...OPT R1205 0 R1208 47 R1207 47 C1205 47pF 50V OPT C1206 47pF 50V OPT C1220 0 1uF 16V C1215 0 1uF 16V Q1201 ISA1530AC1 E B C Q1205 ISA1530AC1 E B C Q1202 ISA1530AC1 E B C C1209 68uF 10V R1223 0 C1222 0 01uF 25V C1208 0 1uF 16V OPT C1210 0 1uF 16V C1219 0 1uF 16V C1214 0 1uF 16V C1227 0 1uF 16V C1200 0 1uF 16V C1221 0 1uF 16V R1229 10 R1224 100 R1225 100K C1216 100pF 50V C1207 100pF 50V R1209 10K R12...

Page 25: ...304 BLM18PG121SN1D 19 22 26LH2000 L1305 BLM18PG121SN1D 8PIN IR L1306 BLM18PG121SN1D 8PIN IR L1307 BLM18PG121SN1D L1308 BLM18PG121SN1D 12PIN IR P1304 12507WS 12L 12PIN IR 1 SCL 2 SDA 3 GND 4 KEY1 5 KEY2 6 5V_ST 7 GND 8 WARM_ST 9 IR 10 GND 11 3 3V 12 PWR_ON 13 IR_OUT 5V_ST 5V_ST Q1301 2SC3052 OPT E B C Q1300 2SC3052 OPT E B C P1305 12507WS 08L 8PIN IR 1 KEY1 2 KEY2 3 GND 4 5V_ST 5 GND 6 IR 7 LED_B 8...

Page 26: ......

Page 27: ...2 SDRAM 512Mb IC301 TDDR_D 0 15 SDDR_A 0 12 Mstar S6 LGE3368A No DVIX IC100 MP6211DH USB Power IC402 USB Power FE_TS_DATA 0 7 Æ CI_MDI 0 7 H SCART SC1_R G B SC1 2_L R_IN FE_AM_AUDIO AV_L R_IN COMP_L R_IN PC_L R_IN FE_ VOUT DTV MNT_VOUT TDDR_A 0 12 TPA6110A IC700 Head Phone RS 232C MAX3232CDR IC403 SPDIF SPDIF_OUT DSUB_H VSYNC HP_L ROUT L R CI_TS_DATA 0 7 PCM_D 0 7 Æ CI_DATA 0 7 CI_ADDR 0 7 AUDIO I...

Page 28: ...or 4 5 A Video error Vertical Horizontal bar residual image light spot external device color error 5 6 No power 6 7 B Power error Off when on off while viewing power auto on off 7 8 No audio Normal video 8 9 C Audio error Wrecked audio discontinuation noise 9 10 No response in remote controller key error 10 11 D Function error External device recognition error 11 12 E Noise Circuit noise mechanica...

Page 29: ...ower Board 15v output Normal voltage Y Replace Inverter or module N Repair Power Board or parts End Always check 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 2009 7 30 1 13 LCD TV Error symptom A Video error No video Audio OK A3 A1 A2 A4 A7 1 First of all C...

Page 30: ...nd service purposes Normal voltage Check various voltages of Power Board 5V 15V No Video No audio Check and replace MAIN B D Y Replace Power Board and repair parts N End Standard Repair Process A Video error No video No audio A5 Established date Revised date 2 13 LCD TV Error symptom 2 2009 7 30 ...

Page 31: ... or not By connecting RF Cable at other equipment DVD Player Set Top Box Different maker TV etc SVC Bulletin Replace Main B D Check Tuner soldering Normal Picture Y N Y Close Normal Picture Y Close Menu Setup Booster By using Digital signal level meter By using Diagnostics menu on OSD Menu Setup Diagnostic Signal strength Normal over 50 Signal Quality Normal over 50 Normal Picture Y Contact with s...

Page 32: ...l Input COMPONENT RGB HDMI DVI Y External device Cable normal External Input Component error Check external device and cable Y External device Cable normal RGB HDMI error Check external device and cable Replace Main B D Replace Main B D N N A Video error Color error A8 N Y End Request repair for external device cable Replace Module N Color error Color error Check Test pattern A11 A10 Standard Repa...

Page 33: ...l Input error 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 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 norma...

Page 34: ... N Y Normal voltage Replace Main B D N Y OK Replace Main B D N Y Normal Check ST BY 5V Replace Power B D N Y Normal voltage Replace Power B D Y A15 A16 A17 A18 Standard Repair Process Established date Revised date 6 13 LCD TV Error symptom 09 years new model apply mechanical power switch to reduce power consumption in stand by status If mechanical power switch off Doesn t turn on by remote control...

Page 35: ... Error symptom Standard Repair Process 7 Status Power off List Explanation POWEROFF_REMOTEKEY Power off by REMOTE 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 Reservate...

Page 36: ... Speaker off Off N Y Cancel OFF and describe Check audio B 15V of Power Board Normal voltage Y N Replace Power Board and repair parts Check Speaker disconnection N Y Replace Speaker Replace MAIN Board End C Audio error No audio Normal video A22 A23 Disconnection Established date Revised date 8 13 LCD TV Error symptom Standard Repair Process 8 2009 7 30 ...

Page 37: ...ked audio Discontinuation Noise only for Analog Wrecked audio Discontinuation Noise only for External Input Connect and 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 15V Repla...

Page 38: ...eck Replace Baterry of R C Check Repair Cable connection Connector solder Normal operating Check B 5V On Main B D A25 Normal Voltage Close N N Check 5v on Power B D Replace Power B D or Replace Main B D Power B D don t have problem A21 Check IR Output signal Normal Signal N Y Repair Replace IR B D N A25 Replace Main B D Y Y N Check R C Operation Normal operating Y Check Repair Cable connection Con...

Page 39: ...rmation Check input signal Signal input Y N External Input and Component Recognition error Check and fix external device 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 11 13 LCD TV Error symptom Standard Repair Process 11 2009 7 30 ...

Page 40: ...s a Tak Tak noise from the cabinet refer to the KMS fix information and then proceed as shown in the solution 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 Man...

Page 41: ...e purposes Replace module Zoom part with exterior damage Module damage Cabinet damage Replace cabinet Replace remote controller Remote controller damage Stand dent Replace stand F Exterior defect Exterior defect Established date Revised date 13 13 LCD TV Error symptom Standard Repair Process 13 2009 7 30 ...

Page 42: ...voltage measuring method A4 5 TUNER input signal strength checking method A5 6 A Video error_ No video Video lag stop LCD TV Version checking method A6 7 LCD TV connection diagram 1 A7 8 Check Link Cable LVDS reconnection condition A8 9 A Video error_Color error Adjustment Test pattern ADJ Key A9 10 LCD TV connection diagram 2 A10 11 Check Link Cable LVDS reconnection condition A11 12 A Video erro...

Page 43: ...ical button at Bottom or Back side A17 20 B Power error_Off when on off while viewing POWER OFF MODE checking method A18 21 B Power error_Off when on off while viewing POWER BOARD PIN voltage checking method A19 22 Checking method in menu when there is no audio A20 23 C Audio error_No audio Normal video Voltage and speaker checking method when there is no audio A21 24 C Audio error_Wrecked audio d...

Page 44: ...or training and service purposes Established date Standard Repair Process Detail Technical Manual Revised date A1 Error symptom Content Check LCD back light with naked eye A Video error_No video Normal audio LCD TV 2009 7 30 A1 Power On disjoint back case check lighting at 1 points ...

Page 45: ...nly for training and service purposes Standard Repair Process Detail Technical Manual Check Inverter cable connection A Video error_No video Normal audio A2 Established date Revised date Error symptom Content LCD TV A2 2009 7 30 Check the inverter cable connection 19inch 22inch ...

Page 46: ...troller for adjustment 2 Enter into White Balance of item 6 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 Standard Repair Process Detail Technical Manual Check White Balance value A Video error_No video Normal audio A3 Established date Revised date Error symptom Content LCD TV A3 2009 7 30 ...

Page 47: ...for training and service purposes Standard Repair Process Detail Technical Manual Power Board voltage measuring method A Video error_No video Audio A4 Established date Revised date Error symptom Content LCD TV A4 2009 7 30 Measure DC 5V 15V applying to inverter PCB from Power Board ...

Page 48: ...ENU Æ SETUP Æ Diagnostics Æ Signal Strength Quality When the signal is strong use the attenuator 10dB 15dB 20dB etc Standard Repair Process Detail Technical Manual TUNER input signal strength checking method A Video error_Video error video lag stop A5 Established date Revised date Error symptom Content LCD TV A5 2009 7 30 ...

Page 49: ...tandard Repair Process Detail Technical Manual LCD TV Version checking method A Video error_Video error video lag stop 1 Checking method for remote controller for adjustment Press the IN START with the remote controller for adjustment Version A6 Established date Revised date Error symptom Content LCD TV A6 2009 7 30 ...

Page 50: ...purposes Standard Repair Process Detail Technical Manual LCD TV connection diagram 1 A Video error _Vertical Horizontal bar residual image light spot As the part connecting to the external input check the screen condition by signal A7 Established date Revised date Error symptom Content LCD TV A7 2009 7 30 ...

Page 51: ...e purposes Standard Repair Process Detail Technical Manual Check Link Cable LVDS reconnection condition A Video error_Color error A8 Established date Revised date Error symptom Content LCD TV A8 Link Cable Contacting Statement Check Area 2009 7 30 19inch 22inch Link Cable Contacting Statement Check Area ...

Page 52: ...Detail Technical Manual Adjustment Test pattern ADJ Key A Video error_Color error You can view 6 types of patterns using 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 A9 Established date Revised date Error symptom Content LCD TV A9 2009 7 30 ...

Page 53: ...urposes Standard Repair Process Detail Technical Manual LCD TV connection diagram 2 A Video error _Vertical Horizontal bar residual image light spot A10 Established date Revised date Error symptom Content LCD TV A10 2009 7 30 As the part connecting to the external input check the screen condition by signal ...

Page 54: ...r training and service purposes Standard Repair Process Detail Technical Manual Check Link Cable LVDS reconnection condition A Video error_Color error A11 Established date Revised date Error symptom Content LCD TV A11 2009 7 30 19inch 22inch Link Cable Contacting Statement Check Area ...

Page 55: ...etail Technical Manual Adjustment Test pattern ADJ Key A Video error_Color error You can view 6 types of patterns using 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 2009 7 30 ...

Page 56: ... right reserved Only for training and service purposes Appendix Exchange the Module 1 Panel Mura Light leakage Press damage Crosstalk Crosstalk Press damage Panel Mura Light leakage Press damage A 4 5 Un repairable Cases In this case please exchange the module ...

Page 57: ...al Block Gate TAB IC Defect Gate TAB IC Defect Gate TAB IC Defect Vertical Line Source TAB IC Defect Vertical Block Source TAB IC Defect Horizontal Block Gate TAB IC Defect Horizontal line Gate TAB IC Defect Gate TAB IC Defect Horizontal Block Gate TAB IC Defect Appendix Exchange the Module 2 A 5 5 Un repairable Cases In this case please exchange the module ...

Page 58: ... reserved Only for training and service purposes Standard Repair Process Detail Technical Manual Check front display LED B Power error _No power A13 Established date Revised date Error symptom Content LCD TV A13 2009 7 30 ST BY Statement Red Power ON Statement White ...

Page 59: ...d service purposes Standard Repair Process Detail Technical Manual Checking method when power is ON B Power error _No power A15 Established date Revised date Error symptom Content LCD TV A15 Check Method at Power ON 1 Check the Key board 2 Check ST BY DC 5V Output Voltage at Power Board 2009 7 30 ...

Page 60: ... for training and service purposes Standard Repair Process Detail Technical Manual POWER BOARD voltage measuring method B Power error _No power A16 Established date Revised date Error symptom Content LCD TV A16 2009 7 30 Measure DC 5V 15V applying to inverter PCB from Power Board ...

Page 61: ...tom or back side B Power error_No power Mechanical Switch A17 Established date Revised date Error symptom Content LCD TV A17 If the mechanical button is selected OFF TV doesn t turn on as well as power led off This button is applied for saving power consumtion at ST BY status Therefore the position On or Off of this mecanical button must be checked before repairing as no power problem 2009 7 30 ...

Page 62: ...y method 1 Press the IN START button of the remote controller for adjustment 2 Check the entry into adjustment item 3 Standard Repair Process Detail Technical Manual POWER OFF MODE checking method B Power error _Off when on off whiling viewing A18 Established date Revised date Error symptom Content LCD TV A18 2009 7 30 ...

Page 63: ...aining and service purposes Standard Repair Process Detail Technical Manual POWER BOARD PIN voltage checking method B Power error _Off when on off whiling viewing A19 Established date Revised date Error symptom Content LCD TV A19 Check each voltage output 5V 15V at power board 2009 7 30 ...

Page 64: ...1 Press the MENU button on the remote controller 2 Select the AUDIO function of the Menu 3 Select TV Speaker 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 A20 Established date Revised date Error symptom Content LCD TV A20 2008 7 30 ...

Page 65: ... C Audio error_No audio Normal video A21 Established date Revised date Error symptom Content LCD TV A21 Check Procedure at No Sound Check 15V connector contacting point statement of main board Measure 15V input voltage supplied by Power Board remove connector and check it out if there is no input voltage Put SPK terminal into tester RX1 when touching GND and output terminal if make Cheuk Cheuk sou...

Page 66: ...input voltage supplied by Power Board If there is no input voltage remove connector check it out Put SPK terminal into tester RX1 when touching GND and output terminal if make Cheuk Cheuk sound it is OK Standard Repair Process Detail Technical Manual A22 Established date Revised date Error symptom Content LCD TV Voltage and SPK Check Method at Sound Defect C Audio error_Sound distortion cut A22 20...

Page 67: ...Function error_ No response in remote controller key error A23 Established date Revised date Error symptom Content LCD TV A23 Check Procedure 1 Check DC5V P402 PIN 6 onto 5V_ST Terminal 2 When checking Pre Amp at Power On Statement If an indicator of analogue tester is moving a little It is OK But If not it is Pre Amp defect P402 PIN 8 Input voltage terminal 5V_ST The remote receiving terminal IR ...

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