LG 42PJ350R Service Manual Download

Page: 27 / 34

ⓒ

LG Electronics. Inc.2009

Making

Revision

PDP TV

Symptom

B. Power Problem

No Power (Not turn on)

Repair Process

. Stand-By: Red
. Operating: White or Black

Power LED

ON?

Check

R/C IR Operation

Normal

Check

Power LED

DC Power on
by pressing Power Key
On Remote control

Normal

Close

Repair/Replace

IR B/D

Check Power cord
was inserted properly

Normal

Close

Check ST-BY 3.5V

on Power Board

Normal

Voltage?

Normal

Signal?

Check Power B/D

Replace Power B/D

Check

AC DET Signal

on Power B/D

Check

RL_ON Signal

on Power B/D

Normal

Signal?

Check Main B/D

Replace Main B/D

Check

the other pin’s

Output voltage

on Power B/D

Normal

Close

Replace

Power B/D

Summary of Contents for 42PJ350R

Page 1: ... READ THE SAFETY PRECAUTIONS IN THIS MANUAL CHASSIS PP01A MODEL 42PJ350R 42PJ350R MA 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 MFL62881410 1005 REV02 ...

Page 2: ...nly Copyright 2010 LG Electronics Inc All rights reserved Only for training and service purposes CONTENTS CONTENTS 2 SAFETY PRECAUTIONS 3 SPECIFICATION 4 ADJUSTMENT INSTRUCTION 7 BLOCK DIAGRAM 15 EXPLODED VIEW 16 SVC SHEET ...

Page 3: ...t 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 met...

Page 4: ...cification 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 V Module Specification 1 42 XGA 42PJ350R MA Central and South America LG Model Name Market Place Brand Model Name 42PJ350R MA Remark Safety IEC EN6...

Page 5: ... 3 Available Channel BAND NTSC VHF 2 13 UHF 14 69 CATV 1 125 4 Receiving system Upper Heterodyne 5 Video Input 2EA PAL SECAM NTSC Rear 1EA Side 1EA 6 Component Input 2EA Y Cb Cr Y Pb Pr 7 RGB Input 1EA RGB PC 8 HDMI Input 2ea HDMI DTV Only PCM MODE Side HDMI 1 Rear HDMI 1 42 50PJ250 MA only 3ea Side HDMI 1 Rear HDMI 2 9 Audio Input 5EA L R Input PC 1EA Component 2EA Rear 1EA Side 1EA 10 RS 232C 1E...

Page 6: ...ode Vivid 3 Brightness uniformity 10 0 10 85IRE Full White Pattern Picture Mode Vivid White X 0 270 0 285 0 300 White 216 level pattern Y 0 278 0 293 0 308 Red Green Blue 255 level pattern Red X 0 635 0 640 4 Color Y 0 318 0 330 0 340 coordinate Green X 0 242 0 300 0 305 Y 0 595 0 600 Blue X 0 150 0 158 Y 0 060 0 070 5 Contrast ratio at dark room 100 000 1 1 000 000 1 White 1 100 White Window Patt...

Page 7: ...justment when module is in the circumstance of over 15 C In case of keeping module is in the circumstance of 0 C it should be placed 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 3 S W Program Download 3 1 Profile This is for downloading the s w to the flash memory of th...

Page 8: ...ould be only one SW binary file in USB Stick 1 Using Power ON button of the control R C Power on TV 2 Insert the USB memory stick to the SET 3 Display USB loding message then push the Exit Key of control R C 4 Push the MENU Key and move the cusor OPTION of OSD Fig 1 Caution Don t push the OK key Just cusor is on the OPTION menu 5 Push the 7 key of control R C continuously Then Display TV Software ...

Page 9: ...ter software D L or PCBA manufacturing you can download EDID Data When you adjust Tool Option H6 Model EDID download process is executed automatically If the model don t have HDMI 3 HDMI 3 will be disappeared at OSD Window Caution When you adjust tool option don t connect HDMI or D sub cable If you connect some cable EDID D L process will be failed 7 Adjustment method Before PCBA check have to cha...

Page 10: ... Use the cable HDMI or D sub cable for EDID Writing Automatically PP01A B C Model EDID download process is executed when you adjust Tool Option Jack Layout Tool Option Item CSA AREA NON EU AREA Inch Tool SIDE AV 0 1 HDMI 0 1 2 3 Side HDMI 0 1 COMP2 0 1 RGB 0 1 RS232C 0 1 Local Key 0 7KEY 1 8KEY LED TYPE 0 RED 1 RED White 2 Reserve USB TYPE 0 NONE 1 PHOTO MUSIC 2 PHOTO MUSIC DivX ...

Page 11: ... Only for training and service purposes EAST EU CIS AREA 5 1 EDID Data O XGA EDID DATA 42 inch Analog RGB 128bytes HDMI 1 256bytes HDMI 2 256bytes HDMI 3 256bytes SIDE HDMI HDMI 3 NO Item Condition Hex Data 1 Manufacturer ID GSM 1E6D 2 Version Digital 1 01 3 Revision Digital 3 03 ...

Page 12: ...V 5 Both component and RGB ADC adjustment are executed automatically When ADC adjustment is finished this OSD appear Notice After All mode check set the Speaker Volume 0 Caution Don t Press the Power Key on Remote Controller Just AC Power Off Not DC off Notice From this sentence All working is mass production 8 POWER PCB Assy Voltage Adjustment Vs voltage Adjustment 8 1 Test Equipment D M M 1EA 8 ...

Page 13: ...Balance 9 1 Required Equipment 1 Remote controller for adjustment 2 Color Analyzer CS 1000 CA 100 100 CA 210 or same produc CH 10 PDP lease adjust CA 210 CA 100 by CS 1000 before measuring 3 Auto W B adjustment instrument only for Auto adjustment 9 2 AUTO White Balance Process Before Adjust of White Balance Please press POWER ONLY key Adjust Process will start by execute RS232C Command O CS 1000 C...

Page 14: ...on is less than 10ux 2 Measure and adjust after sticking the Color Analyzer CA 100 CA210 to the side of the module 3 Aging time After aging start keep the Power on no suspension of power supply and heat run over 5 minutes Above optical characteristics are should be measured by following condition O DDC Adjustment Command Set Measured Mode Picture Mode Vivid Fresh Contrast Off Fresh Color Off Smart...

Page 16: ...ectrical 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 manufact...

Page 17: ...22 EU Q500 2SC3875S ALY EU E B C R526 3K EU R541 3K EU R525 3K EU R519 75 EU R524 1K EU R527 75 EU SC1_R R518 75 EU SC1_G R517 75 EU SC1_B R516 75 EU R507 20K EU R500 0 NONE_EU R501 0 NONE_EU 3 3V_MST C116 100uF 16V EU MNT_VOUT R542 75 EU JK113 PPJ231 01 NONE_EU 8 6 7 5 4 R133 100 R134 100 R135 10K R136 10K JK100 YKF45 7058V BOT_HDMI 14 13 5 20 12 11 2 19 18 10 4 1 17 9 8 3 16 7 6 15 JK101 YKF45 7...

Page 18: ...XCE4 C205 0 01uF 25V M5V_ON L201 MLB 201209 0120P N2 120 ohm 5V_MULTI 5V_ST 17V_TI R226 4 7K ERROR_DET 5V_MULTI R236 100 C208 100uF 16V C212 0 01uF 25V R231 100 R203 100 RL_ON POWER_ON AC_DET C228 0 1uF HOTEL DISP_EN R218 100 R219 470 DISP_EN C226 47uF 16V C214 100uF 16V BU2 SMT 5030D READY 1 LEAD 2 LEAD 3 DUMMY 5V_MULTI R241 100 READY D201 1N4148W READY Q203 2SC3875S ALY READY E B C BUZZ_PWM R242...

Page 19: ...4700pF C320 0 047uF C321 2200pF C322 0 1uF C380 0 1uF C381 0 1uF C382 0 1uF C383 0 1uF C384 0 1uF C385 0 1uF C386 0 1uF C387 0 1uF C388 0 1uF C389 0 1uF C395 0 1uF 16V R304 22 R306 22 R305 22 R307 22 C309 0 1uF 5V_TU C364 0 68uF C363 0 68uF L300 BLM18BD102SN1D EU 10K R317 EU IF_AGC_SEL R316 100 EU C312 4 7uF 35V EU C305 27pF S_SDA R311 330 R312 330 S_SCL C308 27pF R343 0 EU C314 0 1uF 50V L301 120...

Page 20: ... 111 SCZ 112 PWM0 113 PWM1 114 PWM2 115 PWM3 116 LVA4P 117 LVA4M 118 LVA3P 119 LVA3M 120 LVACKP 121 LVACKM 122 LVA2P 123 LVA2M 124 LVA1P 125 LVA1M 126 LVA0P 127 LVA0M 128 VDDP_2 129 LVB4P 130 LVB4M 131 LVB3P 132 LVB3M 133 LVBCKP 134 LVBCKM 135 LVB2P 136 LVB2M 137 LVB1P 138 LVB1M 139 LVB0P 140 LVB0M 141 AVDD_LPLL 142 GND_7 143 VDDC_4 144 GPIO150 I2C_OUT_MUTE 145 GPIO151 I2C_OUT_SD2 146 GPIO152 I2C_...

Page 21: ......

Page 22: ...age on Power Board Control Board Check B 5V Y 1 Check Control Board LED on Crystal X400 1 8V 3 3V 1 2V 5V FET Rom update 2 Replace Control B D SVC R C Pattern Check Sound Sound OK Y Close Y Move No Picture No sound Section Check LVDS Cable Replace Main B D Normal N Y N Move Power problem Section Normal Normal Move Power problem Section N VY VSC VZB First of all Check whether all of cable between b...

Page 23: ...re Problem No Picture No Sound Repair Process Check Module pattern by using TILT key on SVC R C Normal N Check Sound Sound OK Y N Move No Picture Sound Ok Section Close Y Check LVDS Cable Replace Main B D Normal Y N Replace Main B D Normal Check Input signal RF Cable connection SCART Cable connection HDMI Cable connection Component Cable 2 Normal Y N Repair Replace IR B D ...

Page 24: ...problem Type Check voltage VY VSC Y Sus B D Normal Picture Replace Y Sus B D Normal Picture Y N 1 Check Control B D 2 Replace Board Normal Picture Check Y Drive B D Replace B D Y Close N Dark Picture Normal Picture Y Replace Module N Close 1 Check Z Sus Board 2 Replace Board Check Picture mode setting Picture Noise Normal Picture Y N Close Y N Check RF Cable Connection Check Tuner Replace Normal P...

Page 25: ...ck whether other equipments have problem 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 By using signal level meter Signal strength Normal over 50 Signal Quality Normal over 50 Normal Picture Y Contact with signal distributor or broadcaster Cable or ...

Page 26: ...lace Module If Main B D doesn t cause N Y Close 1 Connector re connection 2 Eliminate foreign material on Connector N CTRL B D Control board Check connection of Connector COF TCP on CTRL B D X B D Check connection of Connector FPC on Y Drive B D 1 Connector re connection 2 Eliminate foreign material on FFC 1 Check Y Drive B D 2 Replace Board Normal Picture N Y Close Replace Module 1 Check CTRL B D...

Page 27: ...ressing Power Key On Remote control Normal Close Y N Y Repair Replace IR B D N Check Power cord was inserted properly N Normal Close Y Check ST BY 3 5V on Power Board Normal Voltage N Normal Signal Y Check Power B D Replace Power B D Check AC DET Signal on Power B D Check RL_ON Signal on Power B D N Normal Signal Y Check Main B D Replace Main B D Check the other pin s Output voltage on Power B D N...

Page 28: ...Sus N Power LED Green Y Check Power B D Replace Power B D 1 Check Y Sus Z Sus Board especially Short or Open 2 Replace defective B D To check Power B D Protection Check Power Off History RCU Off 7 Turn off Under watching Off Timer Set Off timer Function off KEY Off 2HOUR Off NO Signal Off Y N Don t appear Power Off History Move No Power problem Section This is not problem Normal operation ...

Page 29: ... Sound N Y Close Y 2 Sound distortion sound drop Check Input signal Cable connection Cable open RF external HDMI SCART Normal Sound Y Close Check AVL off on Clear voiceⅡ off on Y Normal Sound N Close N Problem in all input Problem in external input Case 2 SCART HDMI Check whether Problem happen in same output of other equipments or not By connecting same output cable of other equipment DVD Player ...

Page 30: ...If R C operate Explain the customer cause is interference from light in room Check R C Operating When turn off light in room Check Replace Baterry of R C Check Repair Cable connection Connector solder Normal operating Check B 5V On Main B D 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 Check IR Output signal Normal Signal N Y Repa...

Page 31: ... 1 Dead pixel 2 Image sticking 3 Mal discharge 4 Module defect V Line Bar H Line Bar 5 In case of no picture you can judge defect cause Module or Main B D If patterns appear defect cause is Main B D Tilt Key Making Revision PDP TV Symptom A Picture Problem Check Module pattern by Tilt key Repair Process Reference data Item A1 ...

Page 32: ...ection Y Sus B D Panel 2 Check Y Sus B D 3 Replace Y Sus B D Horizontal Line or Bar 1 Check connection CTRL B D X B D 2 Check CTRL B D 3 Replace CTRL B D Vertical lines or Bar 1 Check connection CTRL B D X B D 2 Check CTRL B D 3 Replace CTRL B D Regular vertical lines To action defects description Symptom picture First of all Check whether all of cable between board was inserted properly or not Ne...

Page 33: ...ence data A20 96 Out Put COF Type 1 Check foreign Connection status 2 Check bad soldering on Chip resistance Defect symptom 192 Out Put TCP Type TCP Tape Carrier Package is film for IC connect with Electrode pattern Direct Bonding on X B D FPC Type Connector to connect between Electrode PAD Of PANEL and Y Drive B D Z Sus B D ...

Page 34: ... Map Power B D Main B D P813 P1100 5V Error_DET 8 7 6 17 15 16 14 No High 3 3V 5V RL_ON High 3 3V 5V AC DET 5V STBY 5V Check the other pin s output High 3 3V 5V Vs ON High 3 3V 5V M5_ON Remark Spec Checking Point P814 1 17V 2 17V 3 GND 4 GND 5 5V 6 5V 7 5V 8 Error_DET 9 GND 10 GND 11 GND 12 GND 13 STBY 14 STBY 15 RL_ON 16 AC_DET 17 M_ON 18 AUTO_GND Wafer SMAW200 H18S2 ...

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