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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. : CL-82

MODEL: L1750SQ-SN

(L1750SQ-SNN.AN**QP)

L1750SQ-BN

(L1750SQ-BNN.AN**QP)

L1750SQ-WN

(L1750SQ-WNN.AN**QP)

( ) **Same model for Service

*To apply the MSTAR Chip.

龙泉现代YDW资料收藏

Содержание Flatron L1750SQ-BN

Страница 1: ...w LGEservice com techsup html CAUTION BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL CHASSIS NO CL 82 MODEL L1750SQ SN L1750SQ SNN AN QP L1750SQ BN L1750SQ BNN AN QP L1750SQ WN L1750SQ WNN AN QP Same model for Service To apply the MSTAR Chip 龙泉现代YDW资料收藏 ...

Страница 2: ...Blank Page1 龙泉现代YDW资料收藏 ...

Страница 3: ...efer to the Timing Chart 3 1 Sync Signal Type Separate Sync SOG composite 3 2 Video Input Signal 1 Type R G B Analog 2 Voltage Level 0 0 71 V a Color 0 0 0 Vp p b Color 7 0 0 467 Vp p c Color 15 0 0 714 Vp p 3 Input Impedance 75 Ω 3 3 Operating Frequency Horizontal 30 83kHz Vertical 56 75Hz 4 Max Resolution D sub Analog 1280 x 1024 75Hz 5 POWER SUPPLY 5 1 Power AC 100 240V 50 60Hz 1 0A 5 2 Power C...

Страница 4: ...le 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 please wipe it off ...

Страница 5: ...eiver 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 can be...

Страница 6: ... 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 coating to ...

Страница 7: ...ion 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 the com...

Страница 8: ...1 4 23 6 H Pixels 49 5 46 875 1056 800 16 80 160 800 x 600 V Lines 75 0 625 600 1 3 21 7 H Pixels 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 Lin...

Страница 9: ...Pell off Al tape from panel Remove the 6 screws from each up of metal frame 2 3 4 5 6 Remove Al tape from control pcb fix Remove the 4 screws from each side of metal frame 1 Pull the front cover upward 2 Then let the all latches are separated 3 Put the front face down 7 8 龙泉现代YDW资料收藏 ...

Страница 10: ...SCALER INPUT SWITCHING TMDS MTV312 MICOM LCD Module R G B differential LIPS 5V 5V TSU16AL TR KTA1273 12V R G B H V Sync 1 8V 3 3V 1 8V 3 3V 3 3V Reg 78D33 5V 3 3V LVDS Low Voltage Differential Signaling AC Input BLOCK DIAGRAM 龙泉现代YDW资料收藏 ...

Страница 11: ... 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 12V is provided for LCD panel and 5V for micom 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 ...

Страница 12: ...ridge rectifier and a bulk capacitor 3 Energy Transfer This part function is 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 achive the dc output stablize...

Страница 13: ...ailable 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 龙泉现代YDW资料收藏 ...

Страница 14: ...y 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 9300K valu...

Страница 15: ...01 NO NO NO CHECK POWER BOARD AND FIND OUT A SHORT POINT AS OPENING EACH POWER LINE CHECK 5VS LINE OPEN CHECK CHECK 3 3V LINE NO CHECK X TAL YES YES YES YES CHECK J705 VOLTAGE PIN5 PIN6 5V CHECK U501 PIN 8 Voltage 5V IS U201 PIN90 3 3V VOLTAGE CHECK U201 PIN 96 PULSE 1 NO PROBLEM 1 Waveforms U201 96 龙泉现代YDW资料收藏 ...

Страница 16: ...D 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 YES YES YES YES J705 PIN5 PIN6 5V J705 PIN9 2 5V J705 PIN10 5V CHECK PULSE AS CONTACTING SCOPE PROBE TO CAUTION LABEL CONTACT PROBE TO CAUTION LABEL CAN YOU SEE PULSE AT YOUR SCOPE 龙泉现代YDW资料收藏 ...

Страница 17: ...15 1 CHECK PIN122 123 SOLDERING CONDITION 2 CHECK X501 3 TROUBLE IN U201 CHECK CONNECTION LINE FROM D SUB TO U501 YES YES YES U201 PIN 18 90 3 3V U201 PIN96 97 OSCILLATE AS 12MHZ U501 PIN43 IS 48KHz H SYNC PIN44 IS 60Hz V SYNC IS PULSE APPEARED AT SIGNAL PINS AT MODE 12 1 2 1 2 Waveforms U201 96 97 U501 43 H SYNC 2 U501 44 V SYNC 龙泉现代YDW资料收藏 ...

Страница 18: ...OUBLE IN DPM NO NO TROUBLE IN U501 CHECK PC PC IS NOT GOING INTO DPM OFF MODE CHECK H V SYNC LINE YES YES CHECK R216 R217 R778 R781 CHECK U501 PIN 43 44 SYNC PULSE 3 3 Waveforms R216 R778 H Sync 3 R217 R781 V Sync 龙泉现代YDW资料收藏 ...

Страница 19: ... 18 WIRING DIAGRAM Connector Ass y P N 6631T11017X Connector Ass y P N 6631T20034M or 6631T20023A Connector Ass y P N 6631T11012W or 6631T11020W 龙泉现代YDW资料收藏 ...

Страница 20: ...EXPLODED VIEW 19 010 020 070 080 090 100 030 110 040 050 060 龙泉现代YDW资料收藏 ...

Страница 21: ... ASSEMBLY L1750S TILT STAND BODY SILVER BLACK 3043TKK227E TILT SWIVEL ASSEMBLY L1750S TILT STAND BODY NT LOCAL SILVER 3043TKK227L TILT SWIVEL ASSEMBLY L1750S TILT STAND BODY JP VER WHITE 3043TKK228A TILT SWIVEL ASSEMBLY L1750S TILT STAND BASE SILVER BLACK 3043TKK228C TILT SWIVEL ASSEMBLY LX 50S TILT STAND BASE NT LOCAL SILVER 3043TKK228F TILT SWIVEL ASSEMBLY LX 50S TILT STAND BASE WHITE COLOR JP V...

Страница 22: ...5CD56A 1UF 1608 10V 10 R TP X7R D701 0DS226009AA KDS226 TP KEC 80V 4NSE DATE 2005 03 15 S AL LOC NO PART NO DESCRIPTION SPECIFICATION D702 0DS226009AA KDS226 TP KEC 80V 4NSE D706 0DS226009AA KDS226 TP KEC 80V 4NSE ZD701 0DZ560009GB BZT52C5V6S F LF DIODES R T ZD702 0DZ560009GB BZT52C5V6S F LF DIODES R T ZD703 0DZ560009GB BZT52C5V6S F LF DIODES R T ZD704 0DZ560009GB BZT52C5V6S F LF DIODES R T ZD711 ...

Страница 23: ...8 R TP R752 0RJ1000D677 100 OHM 1 10 W 5 1608 R TP R753 0RJ1000D677 100 OHM 1 10 W 5 1608 R TP R754 0RJ1000D677 100 OHM 1 10 W 5 1608 R TP R755 0RJ1000D677 100 OHM 1 10 W 5 1608 R TP R769 0RJ0000D677 0 OHM 1 10 W 5 1608 R TP R778 0RJ0682D677 68 OHM 1 10 W 5 1608 R TP R781 0RJ0682D677 68 OHM 1 10 W 5 1608 R TP R803 0RH0000D622 0 OHM 1 10 W 2012 5 00 D R804 0RJ1002D677 10K OHM 1 10 W 5 1608 R TP R80...

Страница 24: ...SCHEMATIC DIAGRAM 23 1 TSU56AL TSU16AL 1 Waveforms U201 96 97 3 R216 R778 H Sync 3 R217 R781 V Sync 1 3 龙泉现代YDW资料收藏 ...

Страница 25: ... 24 2 MICOM 2 U501 43 H SYNC 2 U501 44 V SYNC Waveforms 2 龙泉现代YDW资料收藏 ...

Страница 26: ... 25 3 POWER 龙泉现代YDW资料收藏 ...

Страница 27: ... 26 4 CONNECTOR JACKS 3 Waveforms R216 R778 H Sync 3 R217 R781 V Sync 3 龙泉现代YDW资料收藏 ...

Страница 28: ...Mar 2005 P NO 3828TSL094K Printed in Korea 龙泉现代YDW资料收藏 ...

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