LG 50PS8000 Service Manual Download Page 63 | Manualshive

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Copyright ⓒ 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes

LGE Internal Use Only

PDP TV Repair Process Index

- Trouble shooting by input block (Component level check)

13

USB Problem

USB Problem

13

14

All Input

No OSD

14

9

Digital TV / HDMI

9

10

Analog TV

10

11

Component / AV / RGB

11

12

Optical Audio

12

Video Probelm

Power Problem

8

All Input

Audio Problem

8

No.

Symptom (L)

Input Block

Page

Remark

1 Power-up

Boot

fail

1

2

Digital TV

2

3

Analog TV

3

4

Component

4

5

RGB(D-SUB)

5

6

AV(Scart / CVBS/ S-Video)

6

7

HDMI

7

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Summary of Contents for 50PS8000

Page 1: ... SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL CHASSIS PD91A MODEL 50PS8000 50PS8000 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: ...ectronics Inc All right reserved Only for training and service purposes CONTENTS CONTENTS 2 SAFETY PRECAUTIONS 3 SPECIFICATION 4 ADJUSTMENT INSTRUCTION 7 TROUBLESHOOTING GUIDE 12 BLOCK DIAGRAM 23 EXPLODED VIEW 34 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: ... 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 Chassis PD91A 50PS7000 60PS7000 50PS8000 60PS8000 Albania Austria Belgium Bosnia Bulgaria Coratia Czech Denmark Estonia Finland France Germany Greece Hungary Ireland Italy Kazakhstan Latvia Lithuania Luxembourg Morocco Netherlands Norway Pol...

Page 5: ... RGB Closed Well Type Glass Filter 38 Pixel Format 1920 horiz By 1080 ver 1 Temp 0 40deg 2 Humidity 20 80 3 Temp 20 60deg 4 Humidity 10 90 AC100 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 60 inch Wide Color Display Module 16 9 PDP60H3 RGB Closed Well Type Glass Fil...

Page 6: ... 6 LGE Internal Use Only Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes V Model General Specification ...

Page 7: ...tton on R C for adjustment 2 Press the ADJ button on R C and enter EZ ADJUST Select 7 Test Pattern by using D E CH and press ENTER V Select White by using F G VOL and press ENTER V Set heat run should be activated without a signal generator Single color patterns RED BLUE GREEN of HEAT RUN MODE are used to check a plasma panel Caution If you turn on a still screen more than 20 minutes Especially di...

Page 8: ...n Map RS 232C Adjust Sequence aa 00 00 Enter Adjust Mode xb 00 40 Component1 Input 480i ad 00 10 Adjust 480i Comp1 xb 00 60 RGB Input 1024 768 ad 00 10 Adjust 1024 768 RGB aa 00 90 End Adjust mode 6 EDID Download Procedure 1 Push ADJ button on a service R C 2 Enter EDID auto download mode by selecting 8 EDID D L 3 If you select Start on a dialog box of the screen EDID download will be begun automa...

Page 9: ...odule deviation 0 5V Caution Each Power Supply Unit PCB assembly must be checked by check JIG set Because power PCB Ass y damages to PDP Module especially be careful Set up RF mode noise before a voltage adjustment Test equipment DMM 1EA 9 White Balance Adjustment Caution Press the POWER ON KEY on R C before W B adjustment O Test Equipment Color Analyzer CS 1000 CA 100 CH 10 CA 210 CH 10 O Please ...

Page 10: ...tment 1 Execute the zero calibration of CA 100 CA 210 2 Press the ADJ button on a service R C and enter EZ ASJUST by selecting 6 White Balance 3 Then 216 gray pattern will appear on the screen 4 Change the R G B Gain as passing in 3 color coordinates and temperatures COOL MEDIUM and WARM Temperature COOL R Cut G Cut B Cut is set to 64 Control R Gain and G Gain Each gain is limited to 192 Temperatu...

Page 11: ...Press Power on button of a service R C Baud rate 115200 bps 2 Connect RS232 C Signal Cable 3 Write Serial number through RS 232C 4 Check the serial number at the Diagnostics of SETUP menu Refer to below 10 2 Signal TABLE CMD A0h LENGTH 85 94h 1 16 bytes ADH EEPROM Sub Address high 00 1F ADL EEPROM Sub Address low 00 FF Data Write data CS CMD LENGTH ADH ADL Data_1 Data_n Delay 20ms 10 3 Command Set...

Page 12: ... 12 LGE Internal Use Only Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes TROUBLESHOOTING GUIDE ...

Page 13: ... 13 LGE Internal Use Only Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes ...

Page 14: ... 14 LGE Internal Use Only Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes ...

Page 15: ... 15 LGE Internal Use Only Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes ...

Page 16: ... 16 LGE Internal Use Only Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes ...

Page 17: ... 17 LGE Internal Use Only Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes ...

Page 18: ... 18 LGE Internal Use Only Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes ...

Page 19: ... 19 LGE Internal Use Only Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes ...

Page 20: ... 20 LGE Internal Use Only Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes ...

Page 21: ... 21 LGE Internal Use Only Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes ...

Page 22: ... 22 LGE Internal Use Only Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes ...

Page 23: ... 23 LGE Internal Use Only Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes BLOCK DIAGRAM ...

Page 24: ... 24 LGE Internal Use Only Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes ...

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

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

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

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

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

Page 30: ... 30 LGE Internal Use Only Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes ...

Page 31: ... 31 LGE Internal Use Only Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes ...

Page 32: ... 32 LGE Internal Use Only Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes ...

Page 33: ... 33 LGE Internal Use Only Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes ...

Page 34: ...nd 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 manufacturer IMPOR...

Page 35: ...LGE Internal Use Only Copyright 2009 LG Electronics Inc All right reserved Only for training and service purposes ...

Page 36: ...LGE Internal Use Only Copyright 2009 LG Electronics Inc All right reserved Only for training and service purposes ...

Page 37: ...LGE Internal Use Only Copyright 2009 LG Electronics Inc All right reserved Only for training and service purposes ...

Page 38: ...LGE Internal Use Only Copyright 2009 LG Electronics Inc All right reserved Only for training and service purposes ...

Page 39: ...LGE Internal Use Only Copyright 2009 LG Electronics Inc All right reserved Only for training and service purposes ...

Page 40: ...LGE Internal Use Only Copyright 2009 LG Electronics Inc All right reserved Only for training and service purposes ...

Page 41: ...LGE Internal Use Only Copyright 2009 LG Electronics Inc All right reserved Only for training and service purposes ...

Page 42: ...LGE Internal Use Only Copyright 2009 LG Electronics Inc All right reserved Only for training and service purposes ...

Page 43: ...LGE Internal Use Only Copyright 2009 LG Electronics Inc All right reserved Only for training and service purposes ...

Page 44: ...LGE Internal Use Only Copyright 2009 LG Electronics Inc All right reserved Only for training and service purposes ...

Page 45: ...LGE Internal Use Only Copyright 2009 LG Electronics Inc All right reserved Only for training and service purposes MAIN TOP ...

Page 46: ...LGE Internal Use Only Copyright 2009 LG Electronics Inc All right reserved Only for training and service purposes MAIN BOTTOM ...

Page 47: ...Only Copyright 2009 LG Electronics Inc All right reserved Only for training and service purposes Right LED TOP Center LED TOP Center LED BOTTOM BLUETOOTH TOP BLUETOOTH BOTTOM Right LED BOTTOM CONTROL TOP CONTROL BOTTOM ...

Page 48: ...Feb 2009 Printed in Korea P NO MFL58921602 ...

Page 49: ...GB DSUB_H VSYNC DDC_SDA UART_TX EEPROM ISP_R TXD PC_L RIN COMP1 Side AV1 SIDE_CY_IN CVBS IN SIDE_LR IN COMP_Y Pb Pr COMP_L R IN HDMI1 HDMI2 HDMI3 HDMI4 HDMI MUX NAND flash HY27US08121B Scart 1 Scart 2 Buffer PCM_A 7 0 Audio AMP STA339 I2S LPF SPDIF SPDIF_OUT USB Speaker 10W 10W USB_DM DP RS 232 MAX3232 DBG_TX RX Serial Flash for Boot SPI_CK DI DO Bluetooth Bluetooth L RIN BT_DM DP DDR2 HYB18TC1G16...

Page 50: ..._MPLL 3 3V_HDMI_ST HDMI CEC pull up Stand by 5V Bead 120ohm 5A AZ1117H 1 8 IC803 1A 1 8V_TU AVDD_33_1 5 AVDD_AU 3 3V_ST AZ1117H 3 3 IC801 1A AZ1085S 3 3 IC804 3A 3 3V 3 3V_TU AZ1085S ADJ IC800 1A 1 8V_DDR Saturn 6 AVDD_DDR_1 11 1 8V_S_DDR A_MVREF DDR IC300 DDR IC301 VREF VDD__ VREF VDDL Pin21 VDDP_1 8 3 3V_VDDP NAND flash IC301 Serial flash IC103 Tuner TU1100 3 3V P_ 5V Bead 120ohm 5A Bead 120ohm ...

Page 51: ...025P03 Q501 PCM_5V_CTL GPIO42 PCM2_CE_N CI slot Pin 17 51 Pin4 12V scart 1 2 audio OPAMP block P_12V AZ1085S IC807 1A 5V_TU 5V_CI_ON 18V P_16V Audio AMP 5V_GENERAL MP2121ADN IC805 3A Saturn 6 1 26V_VDDC VDDC_1 27 3 3V_CI HDMI MUX CI buffers Audio AMP 3 3V P_ 5V Bead 120ohm 5A Bead 120ohm 5A Bead 120ohm 5A Bead 120ohm 5A Bead 120ohm 5A Bead 120ohm 5A Bead 120ohm 5A ...

Page 52: ...Copyright ⓒ 2009 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only HW Power On Sequence LGE3369A ...

Page 53: ...n C Sound Problem 8 No Symptom L Symptom M Page Remark 1 No Picture Sound OK 1 2 No Picture No sound 2 3 Mal discharge Noise dark picture 3 4 Picture broken Freezing 4 5 Vertical bar Horizontal Bar 5 6 B Power Problem No Power Not turn on 6 7 Turn off Instant under watching 7 9 E General function Problem Remote control Local switch checking 9 First of all Check whether there is SVC Bulletin in GCS...

Page 54: ...Y N 1 Check Y Sus Z Sus Board 2 Replace defective B D Check B Voltage on Power Board Control Board Check B 5V Y 1 Check Control Board LED on Crystal X101 1 8V 3V 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 F...

Page 55: ...operation Power LED ON Latest S W update from GCSC Firmware Management N Y OSD appear Y N Y N Close 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 Normal...

Page 56: ...ture Y Close Replace Module N Scan Type Check Picture 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 ...

Page 57: ...ave 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 Digital signal level meter By using Diagnostics menu on OSD Menu Setup Diagnostic Signal strength Normal over 50 Signal Quality Normal over 50 Normal Picture Y Contact with signal di...

Page 58: ...D 2 Replace Board Normal Picture Check Main B D Replace 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 FPC 1 Check Y Drive B D 2 Replace Board Norma...

Page 59: ...D N Check Power cord was inserted properly Check Repair Mechanical Power switch on Local control of TV 09 years new model apply mechanical power switch to reduce power consumption in stand by status If mechanical power switch off Doesn t turn on by remote control Doesn t appear LED light N Normal Close Y Check ST BY 5V on Power Board Normal Voltage N Normal Signal Y Check Power B D Replace Power B...

Page 60: ... off Turn on after pull out connector between Power B D Y 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 REMOTE_KEY Turn off Under watching Off Timer Set Off timer Function off ACDET AUTO_Off SW_DW Y N Don t appear Power Off History Move No Power problem Secti...

Page 61: ...B D SVC Bulletin Apply SVC Bulletin S W Upgrade etc N Normal 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 only DTV Case 1 Problem in external input Case 2 SCART HDMI Check whether Problem happen in same output of...

Page 62: ...se is interference from light in room Check R C Operating When turn off light in room Check Replace Battery 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 Repair Replace IR B D N Replace Main B D Y ...

Page 63: ...t block Component level check 13 USB Problem USB Problem 13 14 All Input No OSD 14 9 Digital TV HDMI 9 10 Analog TV 10 11 Component AV RGB 11 12 Optical Audio 12 Video Probelm Power Problem 8 All Input Audio Problem 8 No Symptom L Input Block Page Remark 1 Power up Boot fail 1 2 Digital TV 2 3 Analog TV 3 4 Component 4 5 RGB D SUB 5 6 AV Scart CVBS S Video 6 7 HDMI 7 ...

Page 64: ... Yes Yes Manufacture enterprise meaning of a passage No 6 Check the VSC low pressure output Yes When remove the Input connector of Y Z Sus Board Does it occur Power Board high tension output voltage drop Doesn t the 5V monitor signal come out Doesn t the VSC signal RL_ON come out Doesn t the VSC Low pressure output come out 3 Check the ST_BY 5V signal circuit 4 Check the 5V Monitor signal circuit ...

Page 65: ...o Problem Check RF Cable Check TP Clock Data Sync Maybe Tuner has problems Replace IC1104 Y N Check 3 3V and 1 8V and 1 2V Voltage on IC1103 IC1104 Chip Tuner Replace IC1103 or IC1104 Y N Y Replace Mstar IC100 has problems N Y Check Demodulator Input Clock X1102 31 875MHz Replace it X1102 N Y Check PDP Module Control board Refer to Module CAS Check P403 Clock data PIN 16 17 32 33 ...

Page 66: ...Only CVBS waveform sample Defend on the input signal Making Revision 2009 2 1 PDP TV Input Block Analog TV Video Problem Check RF Cable Check CVBS signal IC1104 16 Pin Replace Tuner IC1104 Y N Replace IC1103 or IC1104 Y N Y Replace Mstar IC100 Check 3 3V and 1 8V and 1 2V Voltage on IC1103 IC1104 Chiptuner 3 14 ...

Page 67: ...ernal Use Only Making Revision 2009 2 1 PDP TV Input Block Component Video Problem Check input signal format Is it supported Check signal on C214 C215 C216 Y Check the damage of JK701 And Replace Connector N Y Replace Mstar IC100 Y Check Component Cable Measured signals depend on the input signal 4 14 ...

Page 68: ... TV Input Block RGB D Sub Video Problem Check input signal format Is it supported Check signal Hsync Vsync R245 R246 Replace R245 R246 Check signal R218 R219 R220 Y N Check JK1001 Replace connector JK1001 Y N Y Replace R218 R219 R220 N Replace Mstar IC100 Y Check RGB Cable conductors for damage Y Measured signals depend on the input signal 5 14 ...

Page 69: ...put Block AV Video Problem Check input signal format Is it supported Check signal C210 SCART1 AV C211 SCART2 AV C217 Side AV C219 S Video Replace capacitor Check AV port of JK902 JK906 Replace or reconnect cable N Replace Mstar IC100 Check AV Cable S Video Cable for damage or open conductors Measured signals depend on the input signal Y Y Y Y N 6 14 ...

Page 70: ...roblem Check input signal format Is it supported Check JK600 JK601 JK602 JK603 for proper connection or damage Replace the Jack Check HDMI Cable for damage or open conductors Replace Mstar IC100 Check HDCP IC107 Power 8 I2C Signal 5 6 Replace IC600 601 602 603 Replace IC107 Check Mstar IC100 Y Y Y Y Y N N Check EDID EEPROM IC600 601 602 603 Power 8 I2C Signal 5 6 N N 7 14 ...

Page 71: ... Problem Make sure you can t hear any audio Check SCL SDA R1235 1236 Replace R1235 1236 Check IC701 Power 17V C721 3 3V R718 Check 17V P800 1 2 3 3V IC701 21 36 Replace IC701 Check Mstar I2S Output R231 232 233 234 Replace IC100 Check speaker for damage Check IC701 Status Reset 31 is High Check Reset R724 They must be High 3 3V Replace the Speaker Y Y Y Y Y Y N N N N N 8 14 ...

Page 72: ...Block Digital TV HDMI Audio Problem Follow procedure All source audio trouble shooting Check EDID EEPROM IC600 601 602 603 Power 8 I2C Signal 5 6 Re download EDID data or Replace IC Digital TV Check video output Follow procedure All source audio trouble shooting Follow procedure digital TV video trouble shooting Replace Mstar IC IC100 Y N N HDMI Y N 9 14 ...

Page 73: ...l Making Revision 2009 2 1 PDP TV Input Block Analog TV Audio Problem Check video output Follow procedure All source audio trouble shooting Y Follow procedure analog TV video trouble shooting N Replace Mstar IC IC100 Check R1122 R1159 for 5V Check R1122 R1159 output N Y Check SIF signal L1105 Replace IC1104 N Y Check SIF signal R1161 Check SIF line N Y Y 10 14 ...

Page 74: ...nnector or cable if found damaged Check signal R953 R954 Component R1030 R1031 RGB R906 R911 R940 R941 SCART R930 R933 AV Side Replace the Resistor Check IC100 signal C2013 C2014 Component C2015 C2016 RGB C229 C230 C2008 C2009 SCART C2011 C2012 AV Side Replace Capacitor Follow procedure All source audio trouble shooting Making Revision 2009 2 1 PDP TV Input Block Component AV RGB Audio Problem Y Y...

Page 75: ...for training and service purposes LGE Internal Use Only SPDIF waveform sample Defend on the input signal Making Revision 2009 2 1 PDP TV Input Block Optical Audio Problem N Check Signal JK904 3 Check SPDIF signal R230 Replace Mstar IC100 Replace JK904 Y Y 12 14 ...

Page 76: ...ption USB power could be disabled by inrushing current In this case remove the device and try to reboot the TV AC power off on Making Revision 2009 2 1 PDP TV Input Block USB Problem Check USB 2 0 Cable for damage or open conductors Y Check JK905 Replace JK905 Y N Replace Mstar IC100 Check IC900 6 N Replace IC900 Y 13 14 ...

Page 77: ...sion 2009 2 1 PDP TV Input Block No OSD Problem Check P403 17 CKM 16 CKP 32 CKP 33 CKM Maybe Mstar has problems Replace IC100 Check LVDS Cable damage or open connectors Check PDP Module Control board Refer to Module CAS Replace Cable Check Vs Va 5V 17V on Powwer Board Replace Power Board Check P800 Disp_EN VaVs ON 5V_MNT Check GPIO Path of IC100 Y Y Y Y N N N N 14 14 ...

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