LG 42PG2500 Service Manual Download Page 31 | Manualshive

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Oct., 2008

Printed in Korea

P/NO : MFL41435507

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Summary of Contents for 42PG2500

Page 1: ... SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL CHASSIS PD82A MODEL 42PG2500 42PG2500 ZA North Latin America http aic lgservice com Europe Africa http eic lgservice com Asia Oceania http biz lgservice com Internal Use Only ...

Page 2: ... Electronics Inc All right reserved Only for training and service purposes CONTENTS CONTENTS 2 SAFETY PRECAUTIONS 3 SPECIFICATION 4 ADJUSTMENT INSTRUCTION 7 TROUBLE SHOOTING 16 BLOCK DIAGRAM 24 EXPLODED VIEW 25 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: ... 50 60Hz Standard Voltage of each product is marked by models 4 Specification and performance of each parts are followed each drawing and specification by 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 CE IEC specification EMC CE IEC Chassi...

Page 5: ...240V 50 60Hz PDP LGE SPEC Maker LG Display Screen Device Aspect Ratio PDP Module Operating Environment Storage Environment Input Voltage 1 2 3 4 5 6 No Item Specification Remark 50 inch Wide Color Display Module 16 9 PDP50PG1 RGB Closed Type Glass Filter 1 Temp 0 40deg 2 Humidity 20 80 3 Temp 20 60deg 4 Humidity 10 90 100 240V 50 60Hz PDP LGE SPEC Maker LG Display Screen Device Aspect Ratio PDP Mo...

Page 6: ... Input 1EA S Video Input 1EA Component Input 1EA RGB Input 1EA HDMI Input 4EA Audio Input 3EA 1 2 3 4 5 6 7 8 9 10 No Item Specification Remark France 1 PAL BG 2 PAL DK 3 PAL I I 4 DVB T ID TV 5 SECAM L L Analog Upper Heterodyne Digital COFDM PAL SECAM PAL SECAM NTSC PAL SECAM NTSC Y Cb Cr Y Pb Pr RGB PC HDMI DTV SOUND PC Audio Component AV 4 System PAL SECAM NTSC PAL60 4 System PAL SECAM NTSC PAL...

Page 7: ... Input the Video Signal 7 Color Bar signal into AV3 2 Set the PSM to Dynamic mode in the Picture menu 3 Press IN START key on R C for adjustment 4 Press the G Vol key to operate the set then it becomes automatically 5 Adjustment of Component 5 1 Standard Equipment 802F Pattern Generatorr Master Pattern Generator MSPG 925 etc or same product 5 2 Required Equipment O Remote controller for adjustment...

Page 8: ...A CARD works normally normal signals display on screen But it works abnormally No CA module words display on screen 9 POWER PCB Assy Voltage Adjustments Va Vs Voltage adjustments 9 1 Test Equipment D M M 1EA 9 2 Connection Diagram for Measuring refer to Fig 4 9 3 Adjustment Method 1 Va Adjustment 1 After receiving 100 Full White Pattern HEAT RUN 2 Connect terminal of D M M to Va pin of P811 connec...

Page 9: ...Analog file for RGB Digital file for HDMI 3 Set the S W as below 4 Push the Write Data Verify button And confirm Yes 5 If the writing is finished you will see the OK message 6 If TV has two HDMI you must download two times for each HDMI 8 5 EDID DATA 1 Analog RGB Detail EDID Options are below 1 2 3 4 5 1 1 Product ID 2 2 Serial No Controlled on production line 3 3 Month Year Controlled on producti...

Page 10: ...able by total EDID data 3 HDMI 2 Detail EDID Options are below 1 2 3 4 5 Please refer HDMI 1 EDID Download is needed HDMI 1 HDMI 4 10 LGE Internal Use Only Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes 1 2 3 4 5 5 50PG6500 00 00 00 FC 00 35 30 50 47 36 35 30 30 0A 20 20 20 20 Model Name Model Name Hex 50PG6500 Product ID Product ID Model Name EDID tabl...

Page 11: ...side pattern Control is carried out on three color temperature COOL MEDIUM WARM Control is carried out three times 5 When the R G B GAIN is 80 on OSD it is the FULL DYNAMIC Range of the Module In order to control white balance without the saturation of FULL DYNAMIC Range and DATA one of R Gain G Gain B Gain should be kept on 80 and other two is controlled lowering from 80 Color Temperature Cool Me...

Page 12: ...ial number D L must be conformed when it is produced in production line because serial number D L is mandatory by D book 4 0 14 Set Information Serial No Model name Option Table 14 1 Setting up Tool Option1 2 After setting white balance this is set Setting Press ADJ Key in the Adjust remocon 1 Press ADJ Key in the R C for adjustment 2 Insert Option value by a number key 3 Press the Enter Button 12...

Page 13: ...r Model Name 1 Push the menu button in DTV mode Select the STATION Diagno stics To set 2 Check the Serial Number 13 LGE Internal Use Only Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes ...

Page 14: ...Monitor signal come out Yes 7 Check the VSC Vs ON signal Doesn t the high tension output come out Doesn t the VSC signal Vs ON come out Yes Yes Does high tension output voltage Drop occur When the Y B D Module input connector is removed does output voltage drop occur When the Y Z B D Module input connector is remove does Power Board hightension output voltage Drop occur Yes No No 9 Check the Power...

Page 15: ... Spec SC101 P813 P811 P812 AC INLET MAIN BOARD PDP MODULE AC NC AC YH396 03 16V GND 12V GND 5VSC 5VSC GND GND 5V_MNT RL_ON M5V_ON M5V_ON GND GND GND GND 5V_MNT AC_DET RL_ON VS_ON M5V_ON AUTO_GND SMH200 22P Vs Vs NC GND GND Va Va GND M5V M5V YH396 10P Vs Vs NC GND GND Va Va GND M5V M5V YH396 10P 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 Description NO ...

Page 16: ...ug in power cord Plug in power cord Yes No Is the Line Filter and Power Board Cable connected Connect the Cable Yes No Is the Fuse F101 on Power Board normal Replace the Fuse Yes No Is the Power Board and 13P of VSC Board Cable connected Connect the Cable Yes No After the cable connect is removed to Power Board except the SC101 connection cable the AC voltage marking is authorized on manual When S...

Page 17: ... Ctrl B D Yes No Yes Is the Y Board normal Is the output voltage normal after remove P103 connector of Y B D Is the Fuse FS101 FS102 on Y B D normal In case of open is replace Yes No Yes Yes Replace Z Board Is the Z Board normal Is the output voltage normal after remove P1 connector of Z B D Is the Fuse FS1 FS2 on Z B D normal In case of open is replace Yes No Yes Is the X Board normal Is the outp...

Page 18: ...normal Is the VAVS on Check the PDP Module Yes No YES Yes Reconnect the LVDS cable in P800 No Is the IC700 FLI8548 Output normal Replace the VSC No NO Replace the Power board Is output the normality Low High voltage except stand by 5V NO 4 No Raster 1 Symptom 1 No OSD and image occur at screen 2 It maintains the condition where the front LED is green 2 Check following ...

Page 19: ...isplayed 1 Symptom 1 LED is green 2 The minute discharged continuously becomes Accomplished from module 2 Check following Is the LVDS cable normal Is the VSC Board normal Is the LVDS cable connected Re insert the Cable inserts Yes No No Yes Does the FIL8548 IC IC700 Operates Replace FIL8548 IC IC700 No Is the Ctrl Board of Module normal Replace Ctrl B D No No Yes Replace hte VSC B D Replace the ca...

Page 20: ...e case of becomes unusual display from side S video AV mode Is the Tuner normal Is the CXA2069Q normal Is the Tuner Cable connected Re insert the Cable Yes No No Yes Is the FIL8548 normal Replace the Tuner No Is the Input voltage IIC Communication and CVBS output normal Yes Is the Input voltage IIC Communication normal No Replace the IC No Is normal the Input voltage IIC Communication No Block A R...

Page 21: ...lay from SCART1 mode 8 In the case of becomes unusual display from SCART2 mode Is theR G B input and H V Sync of the J1100 normal Check the input source No Is the HDMI IC1000 normal Yes Same as Block A Is the Input and Output signal IIC Communication normal No Is the Video input od A V Jack J1200 normal Yes Same as Block A Check the input source No Replace the IC No Is the Video input od A V Jack ...

Page 22: ...to circuit diagram Yes Only specific input except HDMI DTV RF is no sound Check the signal before CAX2069 refer to circuit diagram No No YES Only RF is no sound Check the Tuner IN OUT Yes No YES Only AV component PC input is no sound Is the output of CXA2069 normal Yes No IC1300 operates normal Replace the IC1300 MSP4450 No IC1301 operates normal Replace the IC1301 NTP 3000A No YES Replace the VSC...

Page 23: ...S 232 DTV_CLK Buffer Hsync Vsync D E RGB2 4Bit TMDS TMDS TMDS TMDS Hsync Vsync D E RGB2 4Bit FE_TS_DATA CI_TS_DATA TS_DATA Buffer SIF AM_AUDIO TV_VOUT I2S_DTV I2S_HDMI I2S HDMI_CLK AV R L OUT TV R L OUT I2S REC8 TU_MAIN CVBS Y C L R DTV MNT V R L OUT CVBS D TVL RO UT SCART V R L IN TV R L OUT SPDIF_OUT COMP PC R L IN PC R G B H V Sync SCART R G B FB COMP Y Pb Pr CEC MAIN V Y C OUT D A Synthesis Tu...

Page 24: ...A SCL SDA IC1301 NTP300A IC1300 MSP4450K TU600 TUNER Analog IC702 M62320 IC1000 SIL9125 HDMI Receiver SCL SDA VGA0_SCL VGA0_SDA STI7101 3 3V IC304 24LC256 EEPROM PIO4_0 SSC2_SCL PIO4_1 SSC2_MRST SSC2_MTSR I2C_SCL1 I2C_SDA1 4 7K 3 3V_CTZ 4 7K MSTR1_SCL MSTR1_SDA P_3 3V 4 7K MSTR2_SCL MSTR2_SDA 5 0V 4 7K SCL_5V SDA_5 V SCL_5V SDA_5V SCL_5V SDA_5V SW_TU_SCL SW_TU_SDA 5V_TU 6 2K TU600 TUNER DIGITAL MO...

Page 25: ...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 26: ...LGE Internal Use Only Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes ...

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

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

Page 29: ...LGE Internal Use Only Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes ...

Page 30: ...LGE Internal Use Only Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes PRE AMP TOP PRE AMP BOTTOM MAIN TOP MAIN BOTTOM CONTROL TOP CONTROL BOTTOM ...

Page 31: ...Oct 2008 Printed in Korea P NO MFL41435507 ...

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