LG 42PT200 Service Manual

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Owner's manual (151 pages)

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Owner's manual (124 pages)

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Page 1 Internal Use Only North/Latin America http://aic.lgservice.com Europe/Africa http://eic.lgservice.com Asia/Oceania http://biz.lgservice.com PLASMA TV SERVICE MANUAL CHASSIS : PU14K MODEL : 42PT200 42PT200-UB CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. Printed in Korea P/NO : MFL67002612(1102-REV00)
Page 2: Table Of Contents
CONTENTS ..........................2 SAFETY PRECAUTIONS ......................3 SPECIFICATION.........................4 ADJUSTMENT INSTRUCTION ....................7 BLOCK DIAGRAM ........................12 EXPLODED VIEW ........................13 CIRCUIT DIAGRAM ........................Copyright ©2011 LG Electronics Inc. All rights reserved. - 2 - LGE Internal Use Only Only for training and service purposes...
Page 3: Safety Precautions
An other abnormality exists that must be corrected before the receiver is returned to the customer. Copyright ©2011 LG Electronics Inc. All rights reserved. - 3 - LGE Internal Use Only Only for training and service purposes...
Page 4: Specification
Model Name Market Remark 42PT200-UB NORTH AMERICA Safety : UL1492, CSA C22.2.No.1 EMC : FCC Class B, IC Class B Copyright ©2011 LG Electronics Inc. All rights reserved. - 4 - LGE Internal Use Only Only for training and service purposes...
Page 5: General Specification
2) Humidity : ~ 80 % Storage Environment 1) Temp : -20 deg ~ 60 deg 2) Humidity : 0 % ~ 85 % Copyright ©2011 LG Electronics Inc. All rights reserved. - 5 - LGE Internal Use Only Only for training and service purposes...
Page 6 Meduum:Color temperature 0 0.314 0.329 0.344 Warm:Color temperature W30 - 85IRE(216Gray) 100% Window Brightness uniformity White Pattern - Picture: Vivid(Medium) Copyright ©2011 LG Electronics Inc. All rights reserved. - 6 - LGE Internal Use Only Only for training and service purposes...
Page 7: Adjustment Instruction
- POWER PCB Ass’y Voltage adjustment - Adjustment of White Balance - RS-232C - OPTION - Outgoing condition Configuration - Internal pressure Copyright ©2011 LG Electronics Inc. All rights reserved. - 7 - LGE Internal Use Only Only for training and service purposes...
Page 8: Adjustment Method
(1) After enter Service Mode by pushing “ADJ” key, select “4. EDID D/L”. (2) Finally execute “START” by pushing “ ” or “ ”key. Copyright ©2011 LG Electronics Inc. All rights reserved. - 8 - LGE Internal Use Only Only for training and service purposes...
Page 9 Inside PATTERN is used when W/B is controlled. Connect to auto controller or push control R/C ADJ Key‡ Enter the mode of White-Balance, the pattern will come out. Copyright ©2011 LG Electronics Inc. All rights reserved. - 9 - LGE Internal Use Only...
Page 10 - R-offset / G-offset / B-offset is set to 128 - Control G-Gain and B-Gain. - Each gain is limited to 192 Copyright ©2011 LG Electronics Inc. All rights reserved. - 10 - LGE Internal Use Only Only for training and service purposes...
Page 11 Confirm whether is normal or not when between power board's ac block and GND is impacked on 1.5kV(dc) or 2.2kV(dc) for one second 13. Default Service option. Copyright ©2011 LG Electronics Inc. All rights reserved. - 11 - LGE Internal Use Only Only for training and service purposes...
Page 13: Exploded View
EXPLODED VIEW IMPORTANT SAFETY NOTICE Many electrical 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.
Page 23 Startrek Trouble Shooting Guide [PU14K] LG Electronics/ PDP TV Division ATSC Gr. Great Company Great People...
Page 24 Block Diagram PDP Module Air/Cable MPEG2 Demod. TS In[0…7] IF +/- 8051 TS_clk, SOP, Val TU_CVBS TR Buffer LVDS SDA/SCL_5V Reset IC Reset / IF_AGC … Reset Switch CVBS, L/R 12MHz X-tal Y Pb Pr, L/R Component 1 Saturn4 Y Pb Pr, L/R Saturn4 Component 2 EEPROM...
Page 25 Power Flow Diagram STBY EEPROM (RGB) MAX3232 AVDD_MPLL 1.3V_VDDC AVDD_MLINK Error IC302 3.3VST VDDP AVDD_MEMPLL AP2121N Mstar AVDD_ADC AVDD_DM STBY STBY AVDD_OTG AVDD_AU IC308 AVDD_LPLL 1.3V_VDDC RL-ON AC_DET MP2121DN AVDD_33 M5V- AUTO_GND L323 AVDD_DDR IC303 IC301 3.3V_MST Wafe 1.8V_MST SMW200-H18 DDR1.8V L320 AZ1085S-3.3...
Page 26 Trouble Shooting Guide Power-Up Boot Fail 25MHz Air/Cable TP_IN1 AT/NT LGDT3305 LGDT3305 DDR2 Flash DDR2 Flash 128MB 128MB 12MHz CVBS(NT Main) Video LVDS Analog LVDS RGB 30bit Scaler Con. Front Con. HD/FHD HD/FHD (8input) Analog USB 2.0 USB (EMF) Component 1 COMP1 Component 2 COMP2...
Page 27 Trouble Shooting Guide Power-Up Boot Fail Check Power connector Check P301 All Replace Power board OK ? Voltage Level (16V,5V) Check IC302 (pin2) Output Replace IC302 Voltage Level (3.3V) Check C311 Replace Q302 Voltage Level 5V Check IC303 (pin2) Replace IC303 Voltage Level 3.3V Check IC203 Flash Memory Great Company Great People...
Page 28 Trouble Shooting Guide No OSD 25MHz Air/Cable TP_IN1 AT/NT LGDT3305 LGDT3305 DDR2 Flash DDR2 Flash 128MB 128MB 12MHz CVBS(NT Main) Video LVDS Analog LVDS RGB 30bit Scaler Con. Front Con. HD/FHD HD/FHD (8input) Analog USB 2.0 USB (EMF) Component 1 COMP1 Component 2 COMP2...
Page 29 Trouble Shooting Guide No OSD Check Error 종류 Counter 결과 Period(ms) Frequency(Hz) P701/P703 : Disp_EN, Check GPIO Path of IC1 PFC_DET Error 166.7 P301 : M_ON 5V UVP 125.0 17V UVP 100.0 M5V UVP 83.3 Vs OCP 71.4 Check SMPS Vs,Va, 5V,16V Replace Power Board Vs UVP 62.5...
Page 30 Trouble Shooting Guide Module Control “TILT” on Adjust Remocon Check SMPS & cable PDP Module Power is OK? : PDP internal pattern displays? Replace PDP Module PDP Module is OK. Check Signal Check P701 / P703 Replace X1 : X1 output MODULE_SCL,SDA line SCL,SDA line C715, C717 <...
Page 31 Trouble Shooting Guide Digital TV Video 25MHz Air/Cable TP_IN1 AT/NT LGDT3305 LGDT3305 DDR2 Flash DDR2 Flash 128MB 128MB 12MHz CVBS(NT Main) Video LVDS Analog LVDS RGB 30bit Scaler Con. Front Con. HD/FHD HD/FHD (8input) Analog USB 2.0 USB (EMF) Component 1 COMP1 Component 2 COMP2...
Page 32 Trouble Shooting Guide Digital TV Video Check RF Cable Check Tuner Power Replace IC306 or IC307 IC306 2pin 3.3V IC307 2pin 1.8V Green Bad Tuner. Replace Tuner. Check LD401 color None Maybe Tuner has problems Check TP Clock, Data, Sync AR401 : Replace Tuner Check Demodulator Input Clock...
Page 33 Trouble Shooting Guide Analog TV Video 25MHz Air/Cable TP_IN1 AT/NT LGDT3305 LGDT3305 DDR2 Flash DDR2 Flash 128MB 128MB 12MHz CVBS(NT Main) Video LVDS Analog LVDS RGB 30bit Scaler Con. Front Con. HD/FHD HD/FHD (8input) Analog USB 2.0 USB (EMF) Component 1 COMP1 Component 2 COMP2...
Page 34 Trouble Shooting Guide Analog TV Video Check RF Cable Check Tuner Power Replace IC306 or IC307 IC306 2pin 3.3V IC307 2pin 1.8V Check CVBS signal Replace Tuner(IC401) IC401 #16 Pin Replace Mstar(IC1) < CVBS waveform – sample > - Defend on the input signal. Great Company Great People...
Page 35 Trouble Shooting Guide Component Video 25MHz Air/Cable TP_IN1 AT/NT LGDT3305 LGDT3305 DDR2 Flash DDR2 Flash 128MB 128MB 12MHz CVBS(NT Main) Video LVDS Analog LVDS RGB 30bit Scaler Con. Front Con. HD/FHD HD/FHD (8input) Analog USB 2.0 USB (EMF) Component 1 COMP1 Component 2 COMP2...
Page 36 Trouble Shooting Guide Component Video Check input signal format Is it supported? Check Component Cable Check the damage of JK609 Check signal And Replace Connector C25, C26, C27, C44,C46,C47 Replace IC1 Replace Mstar(IC1) ※ Measured signals depend on the input signal. Great Company Great People...
Page 37 Trouble Shooting Guide RGB Video 25MHz Air/Cable TP_IN1 AT/NT LGDT3305 LGDT3305 DDR2 Flash DDR2 Flash 128MB 128MB 12MHz CVBS(NT Main) Video LVDS Analog LVDS RGB 30bit Scaler Con. Front Con. HD/FHD HD/FHD (8input) Analog USB 2.0 USB (EMF) Component 1 COMP1 Component 2 COMP2...
Page 38 Trouble Shooting Guide RGB Video Check input signal format Is it supported? Check RGB Cable conductors for damage Replace connector (JK601). Check JK601 Check signal, Hsync, Vsync Replace R645, R646. R666, R667 Check signal Replace R15, R17, R18. R58, R59, R60 Check Signal Replace C14, C16, C17.
Page 39 Trouble Shooting Guide AV Video 25MHz Air/Cable TP_IN1 AT/NT LGDT3305 LGDT3305 DDR2 Flash DDR2 Flash 128MB 128MB 12MHz CVBS(NT Main) Video LVDS Analog LVDS RGB 30bit Scaler Con. Front Con. HD/FHD HD/FHD (8input) Analog USB 2.0 USB (EMF) Component 1 COMP1 Component 2 COMP2...
Page 40 Trouble Shooting Guide AV Video Check input signal format Is it supported? Check AV Cable / S-Video Cable for damage or open conductors Check AV port of JK609 (Rear) Replace or reseat connector Check JK603 (Side) Check signal R30 (Rear AV) (Rear) Replace Resistor R29 (Side AV) Replace Mstar(IC1)
Page 41 Trouble Shooting Guide HDMI Video 25MHz Air/Cable TP_IN1 AT/NT LGDT3305 LGDT3305 DDR2 Flash DDR2 Flash 128MB 128MB 12MHz CVBS(NT Main) Video LVDS Analog LVDS RGB 30bit Scaler Con. Front Con. HD/FHD HD/FHD (8input) Analog USB 2.0 USB (EMF) Component 1 COMP1 Component 2 COMP2...
Page 42 Trouble Shooting Guide HDMI Video Check input signal format Is it supported? Check HDMI Cable for damage or open conductors Check JK501 / JK502 / JK503 for Replace connector proper connection or damage Check EDID EEPROM (IC502, 503, 504) Replace IC502, 503, 504 Power(#8) &...
Page 43 Trouble Shooting Guide All Source Audio 25MHz Air/Cable TP_IN1 AT/NT LGDT3305 LGDT3305 DDR2 Flash DDR2 Flash 128MB 128MB 12MHz CVBS(NT Main) Video LVDS Analog LVDS RGB 30bit Scaler Con. Front Con. HD/FHD HD/FHD (8input) Analog USB 2.0 USB (EMF) Component 1 COMP1 Component 2 COMP2...
Page 44 Trouble Shooting Guide All Source Audio Make sure you can’t hear any audio Check Mstar I2S Output Replace IC1. R817, R818, R819 Check 16V (P301 #1,2), Check IC801 Power 3.3V (IC303 #2) 16V(L303), 3.3V(L801,L802) Check /Reset (R829), Check IC801 Status /PDN (R812) /PDN(#19), /Reset(#25) is High? :They must be High (3.3V)
Page 45 Trouble Shooting Guide Digital TV Audio 25MHz Air/Cable TP_IN1 AT/NT LGDT3305 LGDT3305 DDR2 Flash DDR2 Flash 128MB 128MB 12MHz CVBS(NT Main) Video LVDS Analog LVDS RGB 30bit Scaler Con. Front Con. HD/FHD HD/FHD (8input) Analog USB 2.0 USB (EMF) Component 1 COMP1 Component 2 COMP2...
Page 46 Trouble Shooting Guide Digital TV Audio Follow procedure digital TV video Check video output trouble shooting Follow procedure All source audio trouble Replace Mstar IC (IC1) shooting Great Company Great People...
Page 47 Trouble Shooting Guide Analog TV Audio 25MHz Air/Cable TP_IN1 AT/NT LGDT3305 LGDT3305 DDR2 Flash DDR2 Flash 128MB 128MB 12MHz CVBS(NT Main) Video LVDS Analog LVDS RGB 30bit Scaler Con. Front Con. HD/FHD HD/FHD (8input) Analog USB 2.0 USB (EMF) Component 1 COMP1 Component 2 COMP2...
Page 48 Trouble Shooting Guide Analog TV Audio Follow procedure analog TV video Check video output trouble shooting Check IC401 (pin38) for 3.3V Check IC306 output Check SIF signal (IC401 #18) Replace IC401 Check SIF signal (C51) Check SIF line Follow procedure All source audio trouble <...
Page 49 Trouble Shooting Guide Component / RGB / AV Audio 25MHz Air/Cable TP_IN1 AT/NT LGDT3305 LGDT3305 DDR2 Flash DDR2 Flash 128MB 128MB 12MHz CVBS(NT Main) Video LVDS Analog LVDS RGB 30bit Scaler Con. Front Con. HD/FHD HD/FHD (8input) Analog USB 2.0 USB (EMF) Component 1 COMP1...
Page 50 Trouble Shooting Guide Component / RGB / AV Audio Check Connector and cables Replace connector or cable if JK609 (Component, AV Rear) JK601 (RGB) found damaged JK603 (AV Side) Check signal R619 / R623 (Component1) R606 / R608 (Component2) Replace the Resistor R637 / R638 (RGB) R616 / R618 (AV Rear) R633 / R634 (AV Side)
Page 51: Hdmi Audio
Trouble Shooting Guide HDMI Audio 25MHz Air/Cable TP_IN1 AT/NT LGDT3305 LGDT3305 DDR2 Flash DDR2 Flash 128MB 128MB 12MHz CVBS(NT Main) Video LVDS Analog LVDS RGB 30bit Scaler Con. Front Con. HD/FHD HD/FHD (8input) Analog USB 2.0 USB (EMF) Component 1 COMP1 Component 2 COMP2...
Page 52 Trouble Shooting Guide HDMI Audio Check EDID EEPROM (IC502, 503, 504) Replace IC or re-download EDID data. Power(#8) & I2C Signal (#5, #6) Follow procedure All source audio trouble shooting Great Company Great People...
Page 53 Trouble Shooting Guide Optical Audio 25MHz Air/Cable TP_IN1 AT/NT LGDT3305 LGDT3305 DDR2 Flash DDR2 Flash 128MB 128MB 12MHz CVBS(NT Main) Video LVDS Analog LVDS RGB 30bit Scaler Con. Front Con. HD/FHD HD/FHD (8input) Analog USB 2.0 USB (EMF) Component 1 COMP1 Component 2 COMP2...
Page 54 Trouble Shooting Guide Optical Audio Replace Mstar IC Check SPDIF signal (R641) Check Signal (JK604 #3) Replace JK604 < SPDIF waveform – sample > - Defend on the input signal. Great Company Great People...
Page 55 Trouble Shooting Guide USB Audio 25MHz Air/Cable TP_IN1 AT/NT LGDT3305 LGDT3305 DDR2 Flash DDR2 Flash 128MB 128MB 12MHz CVBS(NT Main) Video LVDS Analog LVDS RGB 30bit Scaler Con. Front Con. HD/FHD HD/FHD (8input) Analog USB 2.0 USB (EMF) Component 1 COMP1 Component 2 COMP2...
Page 56 Trouble Shooting Guide USB Audio Check USB 2.0 Cable for damage or open conductors Replace JK702 Check JK702 Check L703 voltage level 5V Replace L703 Check IC701 Replace IC701 Replace Mstar IC • Exception - USB power could be disabled by inrushing current - In this case, remove the device and try to reboot the TV (AC power off/on) Great Company Great People...

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