LG 42PQ20D, Service Manual

Page 1: ...E SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL CHASSIS PA91A MODEL 42PQ20D 42PQ20D AA 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 2009 LG Electronics Inc All right reserved Only for training and service purposes CONTENTS CONTENTS 2 SAFETY PRECAUTIONS 3 SPECIFICATION 4 ADJUSTMENT INSTRUCTION 6 BLOCK DIAGRAM 10 EXPLODED VIEW 11 SVC SHEET PRINTED CIRCUIT DIAGRAM ...

Page 3: ... s Neck 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 metallic parts such as antenna terminals phone jacks etc If the exposed meta...

Page 4: ...part number in accordance with SBOM 5 The receiver must be operated for about 20 minutes prior to the adjustment V Test Method 1 Performance LGE TV test method followed 2 Demanded other specification Safety CB specification EMC CISPR 13 specification V Module Specification 1 50 Chassis PA91A 50PQ60D AA 42PQ60D AA 50PQ20D AA 42PQ20D AA Australia LG Model Name Market Brand Remark Model Name 50PQ60D ...

Page 5: ...0deg 2 Humidity 20 80 3 Temp 20 60deg 4 Humidity 10 90 AC100 240V 50 60Hz PDP LGE SPEC Maker LG Market Broadcasting system Receiving system Video Input 1EA S Video Input 1EA Component Input 2EA RGB Input 1EA HDMI Input 3EA Audio Input 5EA Audio Out 1EA USB 1EA 1 2 3 4 5 6 7 8 9 10 11 No Item Specification Remark Australia 1 PAL BG 2 DVB T Analog Upper Heterodyne Digital COFDM PAL NTSC PAL NTSC Y C...

Page 6: ...aced in the circumstance of above 15 C for 2 hours In case of keeping module is in the circumstance of below 20 C it should be placed in the circumstance of above 15 C for 3 hours O After RGB Full White in HEAT RUN Mode the receiver must be operated prior to the adjustment O Enter into HEAT RUN MODE 1 Press the POWER ON KEY on R C for adjustment 2 OSD display and screen display PATTERN MODE Set is...

Page 7: ... press navigation key G 4 EDID download is executed automatically 5 Press EXIT key on R C 6 EDID DATA 1 Analog RGB O Detail EDID Options are below ⓐ ⓑ ⓒ ⓓ ⓐ Product ID ⓑ Week Year Controlled on production line ex Week 03 03 Year 2006 10 ⓒ Model Name Hex ⓓ Checksum Changeable by total EDID data 2 HDMI O Detail EDID Options are below ⓐ ⓑ ⓒ ⓓ ⓔ ⓐ Product ID ⓑ Week Year Controlled on production line e...

Page 8: ...troller It is possible to check ADC EDID ADJ Caution Each PCB assembly must be checked by check JIG set Because power PCB Assembly damages to PDP Module especially be careful 6 POWER PCB Assembly Voltage Adjustment Va Vs voltage Adjustment 6 1 Test Equipment D M M 1EA 6 2 Connection Diagram for Measuring Refer to fig 1 6 3 Adjustment Method 1 Va adjustment 1 Connect terminal of D M M to Va pin of ...

Page 9: ... enter Service Mode by pushing ADJ key 3 Enter White Pattern off of service mode and change off on 4 Enter W B ADJUST by pushing G key at 3 W B ADJUST 5 Adjust W B DATA for all CSM choose COPY ALL Gain Max Value is 192 So Never make any Gain Value over 192 and please fix one Value on 192 between R G and B 8 4 Auto control Interface and Directions 1 Adjust in the place where the influx of light lik...

Page 10: ... 10 LGE Internal Use Only Copyright 2009 LG Electronics Inc All right reserved Only for training and service purposes BLOCK DIAGRAM ...

Page 11: ...al 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 IMPORTANT SAFETY...

Page 12: ...LGE Internal Use Only Copyright 2009 LG Electronics Inc All right reserved Only for training and service purposes ...

Page 13: ...LGE Internal Use Only Copyright 2009 LG Electronics Inc All right reserved Only for training and service purposes ...

Page 14: ...LGE Internal Use Only Copyright 2009 LG Electronics Inc All right reserved Only for training and service purposes ...

Page 15: ...LGE Internal Use Only Copyright 2009 LG Electronics Inc All right reserved Only for training and service purposes ...

Page 16: ...LGE Internal Use Only Copyright 2009 LG Electronics Inc All right reserved Only for training and service purposes ...

Page 17: ...LGE Internal Use Only Copyright 2009 LG Electronics Inc All right reserved Only for training and service purposes ...

Page 18: ...LGE Internal Use Only Copyright 2009 LG Electronics Inc All right reserved Only for training and service purposes ...

Page 19: ...LGE Internal Use Only Copyright 2009 LG Electronics Inc All right reserved Only for training and service purposes ...

Page 20: ...LGE Internal Use Only Copyright 2009 LG Electronics Inc All right reserved Only for training and service purposes ...

Page 21: ...LGE Internal Use Only Copyright 2009 LG Electronics Inc All right reserved Only for training and service purposes ...

Page 22: ...LGE Internal Use Only Copyright 2009 LG Electronics Inc All right reserved Only for training and service purposes MAIN TOP ...

Page 23: ...LGE Internal Use Only Copyright 2009 LG Electronics Inc All right reserved Only for training and service purposes MAIN BOTTOM ...

Page 24: ...LGE Internal Use Only Copyright 2009 LG Electronics Inc All right reserved Only for training and service purposes CONTROL TOP CONTROL BOTTOM ...

Page 25: ...Feb 2009 Printed in Korea P NO MFL60969504 ...