LG L1742P Скачать руководство пользователя страница 29 | Manualshive

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JUN

. 200

8

P/NO :

MFL403497

1

1

Printed in

China

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Содержание L1742P

Страница 1: ...E SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL CHASSIS NO LM72A MODEL L1742P L1742P FT A QPN To apply the MSTAR Chip Same model for Service Website http biz LGservice com Internal Use Only L1942P L1942P FT A QPN AUTO SET VOLUME ...

Страница 2: ...Horizontal 30 83kHz Vertical 56 75Hz 4 Max Resolution D sub Analog 1280 x 1024 75Hz Digital 1280 x 1024 60Hz 5 POWER SUPPLY 5 1 Power AC 100 240V 50 60Hz 0 6A 5 2 Power Consumption 6 ENVIRONMENT 6 1 Operating Temperature 10 C 35 C 50 F 95 F Ambient 6 2 Relative Humidity 10 80 Non condensing 6 3 MTBF 50 000 HRS with 90 Confidence Lamp Life 50 000 Hours Min 7 DIMENSIONS with TILT SWIVEL L1742P Width...

Страница 3: ...s pencil or pen as this may result in damage to the panel Protect the module from the ESD as it may damage the electronic circuit C MOS Make certain that treatment person s body are grounded through wrist band Do not leave the module in high temperature and in areas of high humidity for a long time The module not be exposed to the direct sunlight Avoid contact with water as it may a short circuit ...

Страница 4: ...receiver positive lead Always remove the test receiver ground lead last 9 Use with this receiver only the test fixtures specified in this service manual CAUTION Do not connect the test fixture ground strap to any heat sink in this receiver Electrostatically Sensitive ES Devices Some semiconductor solid state devices can be damaged easily by static electricity Such components commonly are called El...

Страница 5: ...n anti static suction type solder removal device or with solder braid before removing the IC Replacement 1 Carefully insert the replacement IC in the circuit board 2 Carefully bend each IC lead against the circuit foil pad and solder it 3 Clean the soldered areas with a small wire bristle brush It is not necessary to reapply acrylic coating to the areas Small Signal Discrete Transistor Removal Rep...

Страница 6: ... and carefully crimp it around the IC pin Solder the IC connection 4 Route the jumper wire along the path of the out away copper pattern and let it overlap the previously scraped end of the good copper pattern Solder the overlapped area and clip off any excess jumper wire At Other Connections Use the following technique to repair the defective copper pattern at connections other than IC Pins This ...

Страница 7: ... 667 624 1 3 39 8 H Pixels 65 0 48 363 1344 1024 24 136 160 1024 x 768 V Lines 60 0 806 768 3 6 29 9 H Pixels 78 75 60 123 1312 1024 16 96 176 1024 x 768 V Lines 75 029 800 768 1 3 28 10 H Pixels 100 0 68 681 1456 1152 32 128 144 1152 x 870 V Lines 75 062 915 870 3 3 39 11 H Pixels 92 978 61 805 1504 1152 18 134 200 1152 x 900 V Lines 65 96 937 900 2 4 31 12 H Pixels 108 0 63 981 1688 1280 48 112 ...

Страница 8: ...poses LGE Internal Use Only 2 3 4 Soft pad on the table 1 Place the monitor face down on the cushion or soft cloth Disassemble back cove 1 Remove the 4 serews 2 Disassembly Stand 1 Pull the front cover upward 2 Then let the all latches are separated 3 Put the front face down DISASSEMBLY Set ...

Страница 9: ...tronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 1 1 1 2 2 Separate stand body form the stand base DISASSEMBL Y Stand Push the two latches on the bottom to the inside Reference the 1 2 ...

Страница 10: ...er 5V 12V 5V 3 3V 1 8V Vcc 5V 5V Scaler MCU Intel8032 Inverter 4 lamps 12V Regulator KEY 3 3V 1 8V Line Buffer OSD SSC EEPROM System Module 3 3V SDA SCL 3 3V Flash ROM 12V EEPROM EDID 10 Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Страница 11: ...ternal Use Only LAMP High Low POWER INVERTER Inverter Control IC P ch N ch Inverter Trans SMPS Lamp Current Feedback Over Voltage Protection Power Control IC Feedback Line Filter L N Drive Block 15V 13V 5V Inverter On OFF 3 3V Dimming Lamp Current Control Aux Drive Start Module Vcc Main Board Scaler DC DC converter 15V 5V ...

Страница 12: ...er Part This part consists of the one 3 3V and one 1 8V regulators to convert power which is provided 5V in Power board 12V is provided for inverter 5V is provided for LCD panel Also 5V is converted 3 3V and 1 8V by regulator Converted power is provided for IC in the main board The inverter converts from DC12V to AC 700Vrms and operates back light lamps of module 3 MICOM Part This part is include ...

Страница 13: ... Energy Transfer This part function is for transfer the primary energy to secondary through a power transformer 4 Output rectifier and filter This part function is to make a pulse width modulation control and to provide the driver signal to power switch to adjust the duty cycle during different AC input and output loading condition to achieve the dc output stabilized and also the over power protec...

Страница 14: ...rt sys file to c WINNT system32 drivers folder b Run Userport exe c Remove all default number d Add 300 3FF e Click Start button f Click Exit button 2 EDID Read Write 1 Run WinEDID exe 2 Edit Week of Manufacture Year of Manufacture Serial Number a Input User Info Data b Click Update button c Click Write button 14 Copyright 2007 LG Electronics Inc All right reserved Only for training and service pu...

Страница 15: ...WER switch with 1 second interval 3 The SVC OSD menu contains additional menus that the User OSD menu as described below a Auto Color W B balance and Automatically sets the gain and offset value b NVRAM INIT EEPROM initialize 24C08 c CLEAR ETI To initialize using time d AGING Select Aging mode on off e R G B 9300K Allows you to set the R G B 9300K value manually f R G B 6500K Allows you to set the...

Страница 16: ...01 96 Check Key Control Connector Routine Check U501 NO NO Check 3 3V Line Open Check Check 3 3V Line NO Check X TAL YES Check J703 Voltage Pin5 Pin6 5V Check U601 Pin2 Voltage 3 3V Is U201 Pin75 3 3V Voltage Check U201 Pin 96 Pulse 1 YES YES YES 16 Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Страница 17: ...HECK MICOM INV ON OFF PORT 1 CONFIRM BRIGHTNESS OSD CONTRL STATE 2 CHECK MICOM DIM ADJ PORT LIPS J703 PIN5 PIN6 5V J703 PIN9 5V J703 PIN10 5V CHECK PULSE AS CONTACTING SCOPE PROBE TO CAUTION LABEL CONTACT PROBE TO CAUTION LABEL CAN YOU SEE PULSE AT YOUR SCOPE YES YES YES YES 17 Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Страница 18: ...N U201 CHECK CONNECTION LINE FROM D SUB TO U201 U201 PIN96 97 OSCILLATE AS 14 31MHZ U201 PIN27 IS 48KHz H SYNC PIN28 IS 60Hz V SYNC IS PULSE APPEARED AT SIGNAL PINS AT MODE 12 1 2 1 2 Waveforms U201 96 97 U201 27 H SYNC 2 U201 28 V SYNC YES YES YES U201 PIN 16 75 3 3V 18 Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Страница 19: ...PC IS NOT GOING INTO DPM OFF MODE CHECK H V SYNC LINE CHECK R730 R731 CHECK U201 PIN 27 28 SYNC PULSE 3 3 Waveforms R730 H Syn 3 R731V Sync YES YES 19 Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Страница 20: ...OR OFF NO Trouble in Fuse F101 CHECK 5V 15V Line NO NO Check D104 D105 D106 D107 Check U101 Pin7 9 10V Check D102 Trouble in Q101 NO Trouble in D201 D202 D203 YES CHECK Fuse F101 OK CHECK C101 Voltage AC110V 160Vdc AC220V 304Vdc CHECK U101 Pin6 Waveform Square wave Come out Check Q101 Drain Waveform Check D201 D202 D203 Voltage YES YES YES YES NO ...

Страница 21: ...Scaler Output Main Board CHECK T301 NO NO Check Q301 Q302 Check the waveform of U301 Pin1 15 Check the waveform of U301 Pin2 3 NO If waveform is no problem Check D302 D308 Or Trouble in U303 U304 YES CHECK P201 Pin9 3 3V Check U301 Pin2 5V Check U301 Pin6 VSEN Less than 3V Check U301 Pin12 SSTCMT Less than 1V Check U303 U304 Drain waveform YES YES YES NO ...

Страница 22: ...WIRING DIAGRAM 11P 6P 30P 6631900011J EAD42157802 EAD37413101 22 Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Страница 23: ...300 320 310 420 400 920 200 330 520 510 410 930 940 910 ...

Страница 24: ...E08 TLG1 SXGA 19 0INCH 1280X1024 300CD COLOR 72 4 3 1000 1 P4 Gumi ZBD 5ms 170 H 160 V TLI T con Lusem Source GIP Gate Diffuser 1 Prism MEY42882101 MFB42881801 EBR37001507 Control button MOLD ABS HF 350 MAIN 5 Lx42 Lx42 BLACK Led Lens MOLD PC LG LENS Lx42 Lx42 Lens CONTROL T T LM72A BAIKAL 19 INCH BLUE RD 42 SERIAL Lamp shield PRESS SBHG 0 6mm L1742 SBHG L1742 Lamp shield 0 6mm Lamp shield PRESS S...

Страница 25: ...1 SCALER SCHEMATIC DIAGRAM 25 Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Страница 26: ...2 POWER WAFER 26 Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Страница 27: ...3 INVERTER 27 Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Страница 28: ...4 POWER 28 Copyright 2007 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Страница 29: ...JUN 2008 P NO MFL40349711 Printed in China ...

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