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COLOR MONITOR

SERVICE MANUAL

Website:http://biz.LGservice.com

E-mail:http://www.LGEservice.com/techsup.html

CAUTION

BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

CHASSIS NO. : LM57B

MODEL:

L1752TQ (L1752TQ-BFQ.A**DQP, A**WQP)
L1952TQ (L1952TQ-BFQ.A**XQP, A**WQP)

*To apply the MSTAR Chip.

( ) **Same model for Service

Содержание L1752TQ

Страница 1: ...com E mail http www LGEservice com techsup html CAUTION BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL CHASSIS NO LM57B MODEL L1752TQ L1752TQ BFQ A DQP A WQP L1952TQ L1952TQ BFQ A XQP A WQP To apply the MSTAR Chip Same model for Service ...

Страница 2: ...Hz 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 8A 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 L1752TQ Width 364 5 mm 14 35 Depth 180 mm 7 09...

Страница 3: ... 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 within the module If the surface of panel become dirty pl...

Страница 4: ...st receiver ground lead to the receiver chassis ground before connecting the test 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 ...

Страница 5: ...tip as the solder melts 2 Draw away the melted solder with an 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 coati...

Страница 6: ...onnection 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 technique involves the installation of a jumper wire on t...

Страница 7: ...ls 57 283 49 725 1152 832 32 64 224 832 x 624 V Lines 74 55 667 624 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 9...

Страница 8: ... 8 Monitor on the pad Pull up the stand part Separate head stand 2 3 4 2 Hold the head stand base and then Twist Stand until Click 4 1 5 Soft pad on the table 1 DISASSEMBLY Set ...

Страница 9: ... 9 Remove the screws Disassemble back cover 6 8 1 Pull the front cover upward 2 Then let the all latches are separated 3 1 3 2 3 Put the front face down 9 7 ...

Страница 10: ...LY Stand Push the four latches on the bottom to the outside and Separate Stand Body Base Reference the 1 2 After finished repair necessarily push 4ea Latches to inside for restoration 1 1 In case of Latch 4 1 2 2 3 ...

Страница 11: ...ISASSEMBLY Stand Hold the stand body Confirm two latch of right and left Push the latch to the inside Push the base to the opposite direction 1 2 3 Confirm the condition of separation 5 4 In case of Latch 2 ...

Страница 12: ...arACE LVDS Tx LVDS Analog R G B Digital D Sub DVI D LIPS Filter 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 ...

Страница 13: ...trol IC P ch N ch Inverter Trans SMPS Lamp Current Feedback Over Voltage Protection Power Control IC Feedback Line Filter L N Drive Block 12V 12V 5V Inverter On OFF 3 3V Dimming Lamp Current Control Aux Drive Start Module Vcc Main Board Scaler DC DC converter 12V 5V ...

Страница 14: ...n signal and outputs 8 bit R G B signal to transmitter 2 Power 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 b...

Страница 15: ...DC voltage through a bridge rectifier and a bulk capacitor 3 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 ach...

Страница 16: ... is available to LCD Monitor only 1 Port Setup a Copy UserPort 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 ...

Страница 17: ...display 2 Wait for about 5 seconds and press MENU POWER 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 9300...

Страница 18: ...RT POINT AS OPENING EACH POWER LINE NO PROBLEM 1 Waveforms U201 96 CHECK KEY CONTROL CONNECTOR ROUTINE CHECK U201 NO NO CHECK 3 3V LINE OPEN CHECK CHECK 3 3V LINE NO CHECK X TAL YES CHECK J403 VOLTAGE PIN5 PIN6 5V CHECK U301 PIN2 VOLTAGE 3 3V IS U201 PIN75 3 3V VOLTAGE CHECK U201 PIN 96 PULSE 1 YES YES YES ...

Страница 19: ...OARD AND FIND OUT A SHORT POINT AS OPENING EACH POWER LINE CHECK MICOM INV ON OFF PORT 1 CONFIRM BRIGHTNESS OSD CONTRL STATE 2 CHECK MICOM DIM ADJ PORT LIPS J403 PIN5 PIN6 5V J403 PIN9 5V J403 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 ...

Страница 20: ...CHECK C210 C211 SOLDERING CONDITION 2 CHECK X201 3 TROUBLE IN 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 ...

Страница 21: ...ROUBLE IN DPM TROUBLE IN DPM NO NO TROUBLE IN U201 CHECK PC PC IS NOT GOING INTO DPM OFF MODE CHECK H V SYNC LINE CHECK R442 R443 CHECK U201 PIN 27 28 SYNC PULSE 3 3 Waveforms R442 H Sync 3 R443 V Sync YES YES ...

Страница 22: ...Line NO NO Check BD101 Check U101 Pin7 9 10V Check D102 Trouble in Q101 NO Trouble in D201 D202 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 Voltage YES YES YES YES NO ...

Страница 23: ...k the waveform of U301 Pin11 12 19 20 Check the waveform of U301 Pin11 12 19 20 NO If waveform is no problem Check Q303 Q308 Or Trouble in U303 U304 YES CHECK P201 Pin9 3 3V Check U301 Pin3 5V Check U301 Pin2 OVP Less than 1 8V Check U301 Pin10 CMP Less than 2 75V Check U303 U304 Drain waveform YES YES YES NO ...

Страница 24: ... 24 WIRING DIAGRAM 11P 6P 3P 30P 6631900011H 6631T20023J 6631900109A 6631T20010E L1752TX 6631900125A L1952TX ...

Страница 25: ... 25 EXPLODED VIEW 010 020 090 100 110 120 030 190 150 160 180 170 080 130 140 040 050 070 060 ...

Страница 26: ...4 300CD COLOR or 6304FLP355A LCD Panel TFT LM190E03 TLBC 19INCH 1280X1024 300CD COLOR 72 ZBD OF LM190E03 TLB7 8ms LG PHILIPS LCD EAJ32189001 LCD Module TFT LM190E08 TLB2 DRIVER 19 0INCH 1280X1024 300CD COLOR 72 5 4 800 1 P7 FACTORY 5MS 160 160 2CH LVDS 4LAMP 6304FHS014A LCD Panel TFT HSD190ME13 A13 19INCH 1280X1024 300CD COLOR 72 TN 300NITS 8MS 700VS1 HANNSTAR DISPLAY CORPORATION 3809900177L Cover...

Страница 27: ...nF 10 16V C713 0CK104CF56A 0603B104K160CT 100nF 10 16V C714 0CC680CK41A C1608C0G1H680JT 68pF 5 50V DATE 2006 10 04 S AL LOC NO PART NO DESCRIPTION SPECIFICATION C715 0CC680CK41A C1608C0G1H680JT 68pF 5 50V C716 0CK104CF56A 0603B104K160CT 100nF 10 16V C717 0CK104CF56A 0603B104K160CT 100nF 10 16V C718 0CK104CF56A 0603B104K160CT 100nF 10 16V C719 0CK104CF56A 0603B104K160CT 100nF 10 16V C720 0CK104CF56...

Страница 28: ...5 1 10W R717 0RJ0752D677 MCR03EZPJ750 75OHM 5 1 10W R718 0RJ0682D677 MCR03EZPJ680 68OHM 5 1 10W DATE 2006 10 04 S AL LOC NO PART NO DESCRIPTION SPECIFICATION R719 0RJ0682D677 MCR03EZPJ680 68OHM 5 1 10W R720 0RJ0332D677 MCR03EZPJ330 33OHM 5 1 10W R721 0RJ0752D677 MCR03EZPJ750 75OHM 5 1 10W R722 0RJ0752D677 MCR03EZPJ750 75OHM 5 1 10W R723 0RJ0000D677 MCR03EZPJ000 0OHM 5 1 10W 1 R724 0RJ4701D677 MCR0...

Страница 29: ...D101 0DZ330009CC MTZJ3 3B TP ROHM K DO34 3 ZD301 0DZGD00128A ZMM5231B GRANDE REEL TAPING DATE 2006 10 04 S AL LOC NO PART NO DESCRIPTION SPECIFICATION Q101 0TF760000AD SSS7N60B FAIRCHILD ST TO220F Q301 0TR144009AI DTA144EK CHIP TP ROHM Q302 0TR144009AH DTC144EK CHIP TP ROHM Q303 0TRKE80046A 2N3904S KEC R TP SOT23 60V 2 Q304 0TR390609DC 2N3906S RTK KEC REEL TAPING Q305 0TFDI80001A 2N7002 DIODES R T...

Страница 30: ...E TIME LAG HBC 2153 15MXE LEAD FB101 6210TCE003G BRS3550B BO SUNG 3550MM RADI HS1 4920900021A EXTRUSION 10 20 16 LX52 HS2 4920900021A EXTRUSION 10 20 16 LX52 HS3 4920900022A PLATE 7 60 16 LX52 HS4 4920900032A PLATE 20 5 10 5 12 0 L202 61409B0009A HL 1520S JEONGSAN 7 0UH 25 LF101 6200J000154 13 0 710 23680 SAMWAH BULK L P201 6602T20008K SMW200 11 YEONHO 11P 2 0MM L P401 6630V90218A 35001WR YEONHO 2...

Страница 31: ...SCHEMATIC DIAGRAM 31 1 SCALER ...

Страница 32: ... 32 2 POWER WAFER ...

Страница 33: ... 33 3 INVERTER ...

Страница 34: ... 34 4 POWER ...

Страница 35: ...Oct 2006 P NO 38289S0041 Printed in Korea ...

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