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LG FLATRON L1910S, Service Manual

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LG FLATRON L1910S Service Manual Download Page 16

- 14 -

2. NO RASTER (OSD IS NOT DISPLAYED) – LIPS

NO RASTER

(OSD IS NOT DISPLAYED)

NO

NO

NO

NO

REPLACE CCFL LAMP

IN THE LCD MODULE

CHECK POWER BOARD,
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?

Summary of Contents for FLATRON L1910S

Page 1: ...es 28 Including blank 2pages Part No 1 2 Service Guide Specification Service Guide Specification Changes 4 REV NO MM DD YY SIGNATURE CHANGE NO CHANGE CONTENTS 1 2 3 4 5 7 6 SUFFIX LEE H J 05 02 16 L1910SN LG 3828TSL093Q KIM J O 05 02 16 1 Origin Notification LGEDI Printed in Indonesia LGEWA Printed in U K LGESP Printed in Brazil LGEMX Printed in Mexico LGENT Printed in China LGEIL Printed in India...

Page 2: ... Pagination sheet P NO 3828TSL093Q Total pages 28pages Cover English 3 English 4 English 5 English English Rear Cover Front cover Inside 2 English English 23 English 24 English 25 English blank Rear cover Inside blank ...

Page 3: ...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 L1910S L1910SN AL G L1910S K L1910SN AL B Same model for Service To apply the Genesis ZAN3SL Chip ...

Page 4: ...ming Chart 3 1 Sync Signal Type Separate Sync Composite SOG Sync On Green 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...

Page 5: ...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...

Page 6: ...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 ...

Page 7: ...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...

Page 8: ...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...

Page 9: ... 5 H Pixels 40 0 37 879 1056 800 40 128 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 8...

Page 10: ...TCHING TMDS MTV312 MICOM LCD Module R G B differential LIPS 5V 12V 5V 5V AC Input ZAN3SL ZAN3SL TR KTA 1273 12V R G B H V Sync 3 3V 3 3V1 1 8V 5V 3 3V Reg 78D33 5V 3 3V 3 3V Reg 78D33 5V 3 3V1 LVDS Low Voltage Differential Signaling BLOCK DIAGRAM ...

Page 11: ...gital interpolates input to 1280 X 1024 resolution signal and outputs 8 bit R G B signal to transmitter 2 Power Part This part consists of the 3 3V regulator to convert power which is provided 12V 5V in Power board 12V is provided for LCD panel and 5V is provided for MICOM 5V is converted 3 3V by regulator and 3 3V is converted 1 8V by scaler KTA1273 Converted power is provided for IC in the main ...

Page 12: ...gh 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 st...

Page 13: ... 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 ...

Page 14: ...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...

Page 15: ... NO CHECK POWER BOARD AND FIND OUT A SHORT POINT AS OPENING EACH POWER LINE CHECK 5V LINE OPEN CHECK CHECK 3 3V LINE NO CHECK X TAL YES YES YES YES YES CHECK J705 VOLTAGE PIN5 PIN6 5V CHECK U501 PIN 8 Voltage 5V IS U201 PIN89 3 3V VOLTAGE CHECK U201 PIN 88 PULSE 1 2 3 NO PROBLEM 1 Waveforms J705 5 6 2 U501 8 3 U201 88 ...

Page 16: ...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 ...

Page 17: ...ECK U803 15 1 CHECK PIN 88 89 SOLDERING CONDITION 2 CHECK X501 3 TROUBLE IN U201 CHECK CONNECTION LINE FROM D SUB TO U501 YES YES YES U201 PIN 94 PIN 99 3 3V U201 PIN88 OSCILLATE AS 12MHZ U501 PIN43 IS 48KHz H SYNC PIN44 IS 60Hz V SYNC IS PULSE APPEARED AT SIGNAL PINS AT MODE 12 4 5 Waveforms 5 U501 43 H Sync 4 U201 94 5 U501 44 V Sync ...

Page 18: ...E IN DPM NO NO TROUBLE IN PC CHECK PC PC IS NOT GOING INTO DPM OFF MODE CHECK SIGNAL CABLE YES YES CHECK R213 R779 HYNC R214 R775 VYNC CHECK U501 PIN 19 ST DET 6 7 6 Waveforms R213 R779 H Sync 6 R214 R775 V Sync 7 U501 ST DET 19 ...

Page 19: ... 17 WIRING DIAGRAM Connector Ass y P N 6631T11012W or 6631T11020W Connector Ass y P N 6631T20020Q Connector Ass y P N 6631T20024B ...

Page 20: ...EXPLODED VIEW 18 010 020 050 080 070 060 090 110 100 030 040 ...

Page 21: ...SKD L1910S K 6871TST374A PWB PCB ASSEMBLY SUB L1710BL CONTROL TOTAL BRAND CONTROL 4951TKS126E METAL ASSEMBLY FRAME L1910SM LPL CMO FUSITSU 226E 4951TKS126L METAL ASSEMBLY FRAME L1910SM LPL CMO FUJ E C SKD 6871TPT271V PWB PCB ASSEMBLY POWER M CHASSIS 19LPL DOCKING 2PIN 78R12 450V POWER TOTAL LIEN CHANG or 6871TPT282M PWB PCB ASSEMBLY POWER M CHASSIS 19LPL DOCKING 2PIN 78R12 450V POWER TOTAL LIEN CH...

Page 22: ...16V 20 FL BULK C832 0CE107EF610 100UF KMG RD 16V 20 FL BULK C833 0CK105CD56A 1UF 1608 10V 10 R TP X7R C834 0CC102CK41A 1000PF 1608 50V 5 R TP NP0 DATE 2005 02 04 S AL LOC NO PART NO DESCRIPTION SPECIFICATION D701 0DS226009AA KDS226 TP KEC SOT 23 80V 30 D702 0DS226009AA KDS226 TP KEC SOT 23 80V 30 D706 0DS226009AA KDS226 TP KEC SOT 23 80V 30 ZD701 0DZKE00138A KDZ5 6V KEC R TP USC 0 2W 5 ZD702 0DZKE...

Page 23: ...8 OHM 1 10 W 5 1608 R TP R779 0RJ0682D677 68 OHM 1 10 W 5 1608 R TP R780 0RJ2001D677 2K OHM 1 10 W 5 1608 R TP R781 0RJ2001D677 2K OHM 1 10 W 5 1608 R TP R782 0RJ0471D677 4 7 OHM 1 10 W 5 1608 R TP R803 0RJ0000D677 0 OHM 1 10 W 5 1608 R TP R811 0RJ2202D677 22K OHM 1 10 W 5 1608 R TP R812 0RJ5600D677 560 OHM 1 10 W 5 1608 R TP R813 0RJ0472D677 47 OHM 1 10 W 5 1608 R TP R814 0RJ0472D677 47 OHM 1 10 ...

Page 24: ...SCHEMATIC DIAGRAM 22 1 ZAN3SL 3 Waveforms U201 88 4 U201 94 3 4 ...

Page 25: ... 23 2 MICOM 2 U501 8 U501 ST DET 19 Waveforms 2 5 7 7 5 R213 R779 H Sync 5 R214 R775 V Sync ...

Page 26: ... 24 3 POWER ...

Page 27: ... 25 4 CONNECTOR JACKS 1 Waveforms J705 5 6 6 R213 R779 H Sync 6 R214 R775 V Sync 6 1 ...

Page 28: ...Blank Page1 ...

Page 29: ...Blank Page2 ...

Page 30: ...Feb 2005 P NO 3828TSL093Q Printed in Korea ...

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