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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)
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.
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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...
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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...
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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...
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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...
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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 <...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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.
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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...
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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)
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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...
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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) &...
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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...
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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)
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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...
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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...
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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...
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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 <...
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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...
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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)
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...
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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...
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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...
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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...
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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...
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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...