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LG L1717SBN - - 17" LCD Monitor, Руководство по обслуживанию

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LG L1717SBN - - 17

- 14 -

TROUBLESHOOTING GUIDE

1. NO POWER

1

Waveforms

U201-#96

NO POWER

(POWER INDICATOR OFF)

CHECK KEY CONTROL

CONNECTOR ROUTINE

CHECK U201

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

Содержание L1717SBN - - 17" LCD Monitor

Страница 1: ...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 L1717S L1717S SNN AN EP L1717S L1717S BNN AN EP L1717S L1717S GNN AN EP To apply the MSTAR Chip Same model for Service ...

Страница 2: ...put 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 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 S...

Страница 3: ...e 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 please wipe i...

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: ...128 88 800 x 600 V Lines 60 317 628 600 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 6...

Страница 8: ...ble back cover 1 1 Pull the front cover upward 2 Then let the all latches are separated 3 Put the front face down Pull out the cable Remove the screws 2 3 4 5 6 Pull out the link cable while pushing up the main frame Disassemble Control PCB 7 ...

Страница 9: ...PUT SWITCHING TMDS MTV312 MICOM LCD Module R G B differential LIPS 5V 3 3V AC I nput TSU16AL TR KTA 1273 12V R G B H V Sync 1 8V 3 3V1 1 8V 3 3V1 3 3V Reg 78D33 5V 3 3V1 3 3V Reg 78D33 5V 3 3V LVDS Low Voltage Differential Signaling BLOCK DIAGRAM ...

Страница 10: ...puts 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 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...

Страница 11: ...h a bridge 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 sta...

Страница 12: ... 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 13: ...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 14: ...CONNECTOR ROUTINE CHECK U201 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 ...

Страница 15: ...ARD 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 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 ...

Страница 16: ... U803 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 ...

Страница 17: ...DPM 3 Waveforms R216 R778 H Sync 3 R217 R781 V Sync TROUBLE 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 ...

Страница 18: ... 18 POWER MAIN CONTROL WIRING DIAGRAM Connector Ass y P N 6631T20022G Connector Ass y P N 6631T11012W or 6631T11020W Connector Ass y P N 6631T20020Q ...

Страница 19: ... 19 EXPLODED VIEW 020 010 060 070 080 090 040 050 110 100 030 ...

Страница 20: ...PLAY LM170E01 TLA3 LG PHILPS TFT COLOR P5 645CH 250NITS 8MS LPL NJ KUMI PB FREE EGI MAGNA S D IC EGI SXGA 3809TKL123D BACK COVER ASSEMBLY L1717S L125 HF350 BK DI LOCAL For Europe Austrailia U K 3809TKL123B BACK COVER ASSEMBLY L1717S L125 HF350 BK A CKD WA LOCAL For Europe U K 3809TKL123A BACK COVER ASSEMBLY L1717S L125 HF350 BK NT LOCAL For Russia 3043TKK264E TILT SWIVEL ASSEMBLY L1717S BK W O BC ...

Страница 21: ...T112 LF ISAHAYA R LGEDI DATE 2005 06 02 S AL LOC NO PART NO DESCRIPTION SPECIFICATION D701 0DS226009AA KDS226 TP KEC 80V 4NSE LGENT LGEWA D702 0DSIH00018A ENKMC2837 T112 LF ISAHAYA R LGEDI D702 0DS226009AA KDS226 TP KEC 80V 4NSE LGENT LGEWA D706 0DSIH00018A ENKMC2837 T112 LF ISAHAYA R LGEDI D706 0DS226009AA KDS226 TP KEC 80V 4NSE LGENT LGEWA ZD701 0DZ560009GB BZT52C5V6S F LF DIODES R T ZD702 0DZ56...

Страница 22: ...77 10K OHM 1 10 W 5 1608 R TP R737 0RJ0000D677 0 OHM 1 10 W 5 1608 R TP R744 0RJ4701D677 4 7K OHM 1 10 W 5 1608 R TP R747 0RJ4701D677 4 7K OHM 1 10 W 5 1608 R TP R751 0RJ4700D677 470 OHM 1 10 W 5 1608 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...

Страница 23: ...SCHEMATIC DIAGRAM 23 1 TSU56AL TSU16AL 1 3 1 Waveforms U201 96 97 3 R216 R778 H Sync 3 R217 R781 V Sync ...

Страница 24: ... 24 2 MICOM 2 U501 43 H SYNC 2 U501 44 V SYNC Waveforms 2 ...

Страница 25: ... 25 3 POWER ...

Страница 26: ... 26 4 CONNECTOR JACKS 3 Waveforms R216 R778 H Sync 3 R217 R781 V Sync 3 ...

Страница 27: ...Jun 2005 P NO 38289S0001Z Printed in Korea ...

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