LG 22LG30R, Service Manual

Page 1: ...LCD TV SERVICE MANUAL CAUTION BEFORE SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL CHASSIS LP81K MODEL 22LG30R 22LG30R MA website http biz LGservice com Internal Use Only ...

Page 2: ... 2 CONTENTS CONTENTS 2 SAFETY PRECAUTIONS 3 SPECIFICATION 6 ADJUSTMENT INSTRUCTION 9 TROUBLE SHOOTING 13 BLOCK DIAGRAM 19 EXPLODED VIEW 20 SVC SHEET ...

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

Page 4: ...vely 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 buildup or exposure of the assembly 3 Use only a ground...

Page 5: ...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 replaced component and adjacent components and the circuit boa...

Page 6: ...ICATION NOTE Specifications and others are subject to change without notice for improvement 3 Module Specification Item Specification Measurement Result Remark Display Screen Device 22 wide Color Display Module Aspect Ratio 16 10 LCD Module 22 TFT WSXGA LCD Operating Environment Temp 0 40 deg LGE SPEC Humidity 0 85 Storage Environment Temp 20 60 deg Humidity 0 85 Input Voltage 100 240V 50 60Hz Pow...

Page 7: ...720 576 15 625 50 00 13 500 SDTV DVD 576I 625I 50Hz 4 720 480 31 47 59 94 27 000 SDTV 480P 5 720 480 31 50 60 00 27 027 SDTV 480P 6 720 576 31 25 50 00 27 000 SDTV 576P 50Hz 7 1280 720 44 96 59 94 74 176 HDTV 720P 8 1280 720 45 00 60 00 74 250 HDTV 720P 9 1280 720 37 50 50 00 74 25 HDTV 720P 50Hz 10 1920 1080 28 125 50 00 74 250 HDTV 1080I 50Hz 11 1920 1080 33 72 59 94 74 176 HDTV 1080I 12 1920 10...

Page 8: ...req kHz Pixel clock MHz Proposed 1 720 480 31 47 59 94 27 000 SDTV 480P 2 720 480 31 50 60 00 27 027 SDTV 480P 3 720 576 31 25 50 00 27 000 SDTV 576P 4 1280 720 37 5 50 00 74 250 HDTV 720P 50Hz 5 1280 720 44 96 59 94 74 176 HDTV 720P 6 1280 720 45 00 60 00 74 250 HDTV 720P 7 1920 1080 33 72 59 94 74 176 HDTV 1080I 8 1920 1080 33 75 60 00 74 250 HDTV 1080I 9 1920 1080 28 125 50 00 74 250 HDTV 1080I...

Page 9: ...tive humidity if there is no specific designation 4 The input voltage of the receiver must keep 100 220V 50 60Hz 3 PCB assembly adjustment method Using MSTAR Download program 3 1 S W program download 1 Preliminary steps Connect the download jig to D sub jack 2 Download steps 1 Execute ISP Tool program in PC then a main window will be opened 2 Click the connect button and confirm Dialog Box 3 Click...

Page 10: ...PROM 0xBC is 0xAA or not If 0xF3 0xF4 address of EEPROM 0xBC isn t 0xAA we adjust once more We can confirm the ADC values from 0x06 0x0B addresses in a page 0xBC Manual ADC process using Service Remocon After enter Service Mode by pushing ADC key execute Auto RGB by pushing _ key at Auto RGB After Tool option Area option change you have to AC power off Before PCBA check you have to change the Tool...

Page 11: ...set after finishing the adjustment 4 Check DDC adjust mode release by exit key and release DDC adjust mode 3 Enter the adjust mode of white balance Enter the white balance adjustment mode with aging command F3 00 FF Luminance min value is 190cd m2 in the cool mode For LCD 5 4 Adjustment of White Balance for Manual adjustment 1 Adjustment mode Two modes Cool and Warm Medium data is automatically ca...

Page 12: ...768 60hz 5 HDMI 6 PC Audio In and H P Out Display and Sound check is executed by Remote controller Aging On Off F3 00 FF 00 FF ON OO OFF Input select F4 00 0x10 TV 0x20 AV 0x40 Component 0x60 RGB 0x90 HDMI R GAIN 16 00 00 C0 Adjustment Gain G GAIN 18 00 C0 CSM COOL B GAIN 1A 00 C0 R GAIN 16 01 00 C0 Adjustment Gain G GAIN 18 00 C0 CSM NORMAL B GAIN 1A 00 C0 R GAIN 16 02 00 C0 Adjustment Gain G GAI...

Page 13: ...il Re soldering or Change defect part of IC100 Q307 Change IC1000 IC1006 Pass Change IC1102 IC1103 Check Output of IC1002 Fail Check short of Q307 TU600 IC500 Fail Re soldering or Change defect part of Q307 TU600 IC500 Pass Pass Change IC1003 Change LED Assy Check Output of IC1003 Pass Check LED Assy Pass Check P307 Connector Fail Check short of IC100 IC400 Fail Fail Re soldering or Change defect ...

Page 14: ...Link Cable or Module Pass Fail Change Panel Link Cable or Module Check Inverter Connector or inverter Fail Change Inverter Connector or Inverter Pass Change IC100 Check Output of L300 Pass Check the LVDS Output of IC100 Pass Check Input source Cable and Jack Fail Change Module Fail Fail Change L300 ...

Page 15: ...ut output of R735 R736 Fail Check the J701 Pass Re soldering or change the defect part Check the X100 Check the input output of R125 R128 R123 Pass Check the input output of IC100 Pass Check input source cable and jack Fail Fail Re soldering or Change the defect part ...

Page 16: ...eck the input output of R801 Fail Check the JK800 Pass Re soldering or change the defect part Check the X100 Check the input output of R109 Pass Check the input output of IC100 Pass Check input source cable and jack Fail Fail Re soldering or Change the defect part ...

Page 17: ...e defect part Check the X100 Pass Check input source cable and jack Check input source cable and jack Repeat A B process Fail Check the output of TU600 Pass Pass Fail Check 5V of TU600 Re Soldering or change the defect part Check the input output of R193 R925 R926 Fail Change R193 R925 R926 Pass Check input output of IC100 Pass Fail Re soldering of Change defect part Check the X100 Pass Pass ...

Page 18: ...the source input Check input Output of IC100 Fail Pass Re soldering of Change the defect part Check the X100 Check the input output of IC500 Fail Re soldering or Change the defect part Pass Check the Speaker Pass Check the Speaker wire Fail Change Speaker ...

Page 19: ... HY5DU281622ETP DDR SDRAM 128M TV Tuner TAFT Z703D TV Tuner TAFT H703F SCL SDA LGE6991DD Sc aler Vid eo Dec o d er COMPONENT Jac k D Sub Rx Tx CS4352 DAC 5V DC DC DC DC FET St 5V LED IR Bo ard Co nt ro l ST3232CDR RS 232C PWM_DIM DIM_CTL YDA138 Aud io amp Rx Tx SCART Jac k Op tio n C VBS o ut A ud io o u t A ud io in C VBS in R GB in Co m po ne nt Y Pb Pr Au di o In L R Video in Au dio in SC L SDA...

Page 20: ... 20 300 200 120 122 123 501 500 900 910 920 540 530 511 510 400 410 820 LV1 EXPLODED VIEW ...

Page 21: ...Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 22: ...Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 23: ...Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 24: ...Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 25: ...Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 26: ...Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 27: ...Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 28: ...Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 29: ...Mar 2008 Printed in Korea P NO MFL423054034 ...