LG Flatron L1730B Service Manual Download Page 22 | Manualshive

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3. NO RASTER (OSD IS NOT DISPLAYED) – MST9011B

NO RASTER

(OSD IS NOT DISPLAYED)

NO

NO

NO

TROUBLE IN CABLE

OR LCD MODULE

CHECK U801

1. CHECK U201 PIN122, 123

SOLDERING CONDITION

2. CHECK X501
3. TROUBLE IN U201

CHECK CONNECTION LINE
FROM D-SUB TO U501

YES

YES

YES

U201

POWER PIN8, 114

3.3V?

U201

PIN122, 123

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

4

5

Waveforms

U201-#122, 123

U501-#43 H-SYNC

5

U501-#44 V-SYNC

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Summary of Contents for Flatron L1730B

Page 1: ...age English 7 Number of pages 32 Including blank 2pages Part No 1 2 Service Guide Specification Service Guide Specification Changes 4 REV NO MM DD YY CHANGE NO CHANGE CONTENTS 1 2 3 4 5 7 6 SUFFIX L1730BSNHM LG 3828TSL084H 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 8 Special Ins...

Page 2: ...Pagination sheet Pagination sheet Cover Front cover Inside blank English 2 English 3 English 4 English English Rear Cover English 29 Rear cover Inside blank English 27 English 28 English English 26 ...

Page 3: ...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 62 MODEL L1730B L1730BSNHM AL R Issue Date 2004 11 ...

Page 4: ... 1 ...

Page 5: ... 83kHz Digital 30 71kHz Vertical 56 75Hz 4 MAX RESOLUTION D sub Analog 1280 x 1024 75Hz DVI Digital 1280 x 1024 60Hz 5 POWER SUPPLY 5 1 Power AC 100 240V 50 60Hz 1 0A 5 2 Power Consumption 6 ENVIRONMENT 6 1 Operating Temperature 10 C 35 C 6 2 Operating Humidity 10 80 6 3 MTBF 50 000 HRS with 90 Confidence level Lamp Life 50 000 Hours Min 7 DIMENSIONS with TILT SWIVEL Width 398 mm 15 67 Depth 140mm...

Page 6: ...M D S Data1 T M D S Data1 T M D S Data1 3 Shield T M D S Data3 T M D S Data3 5V Power Ground return for 5V H Sync and V Sync Pin Signal DVI D 1 8 9 17 24 16 16 17 18 19 20 21 22 23 24 Hot Plug Detect T M D S Data0 T M D S Data0 T M D S Data0 5 Shield T M D S Data5 T M D S Data5 T M D S Clock Shield T M D S Clock T M D S Clock T M D S Transition Minimized Differential Signaling DVI D Connector Digi...

Page 7: ...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 8: ...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 9: ...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 10: ...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 11: ...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...

Page 12: ...up the cabinet corner side 5 1 Disassemble the cabinet 5 2 Hold the control PCB as shown in the figure and gently pull it out 6 Push up the back cover as shown in the figure and pull out the chassis assembly so that the latch is untied 2 Hold the set while folding the latch and take out the stand base 3 1 Push the cover upward and remove it 3 2 Unscrew the four screws 1 4 2 5 3 6 ...

Page 13: ... 10 7 9 8 7 Push the shield cap upward and disassemble it 9 Pull out the link cable while pushing up the main frame 8 Pull out the cable ...

Page 14: ...M M S T 9 1 5 1 Control Board J1 J706 J702 J707 Power Board Main Board 11 WIRING DIAGRAM Connector Ass y P N 6631T20020Q Connector Ass y P N 6631T20024C Connector Ass y P N 6631T11012W 6631T11020W ...

Page 15: ... 12 BLOCK DIAGRAM ...

Page 16: ...nput to 1024 X 768 resolution signal and outputs 6 bit R G B signal to transmitter 2 Power Part This part consists of the two 3 3V regulators and two 2 5V drop diodes to convert power which is provided 12V 5V in Power board 3 3V is Provided for LCD panel and 5V is Provided for Micom Also 5V is converted 3 3V by regulator and 3 3V is converted 2 5V by drop diode Converted power is provided for IC i...

Page 17: ...age 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 achieve th...

Page 18: ... 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 19: ...side of display 2 Wait for about 5 seconds and press MENU key Press Power key 3 Shows the service OSD menu 4 The service OSD menu contains additional menus that the User OSD menu as described below a CLEAR ETI To initialize using time b AUTO COLOR W B balance and Automatically sets the gain and offset value c AGING Select Aging mode on off d PANEL Select using panel e NVRAM INIT EEPROM initialize ...

Page 20: ... 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 PIN114 3 3V VOLTAGE CHECK U201 PIN 122 PULSE 1 1 2 1 2 Waveforms NO PROBLEM J705 5 6 U501 8 U201 122 ...

Page 21: ...LIPS CHECK MICOM INV ON OFF PORT 1 CONFIRM BRIGHTNESS OSD CONTRL STATE 2 CHECK MICOM DIM ADJ PORT REPLACE LIPS YES YES YES YES J705 PIN5 PIN6 5V J705 PIN9 MORE THAN 3V J705 PIN1 5V CHECK PULSE AS CONTACTING SCOPE PROBE TO CAUTION LABEL CONTACT PROBE TO CAUTION LABEL CAN YOU SEE PULSE AT YOUR SCOPE 3 3 3 Waveforms J705 9 J705 9 ...

Page 22: ...K U201 PIN122 123 SOLDERING CONDITION 2 CHECK X501 3 TROUBLE IN U201 CHECK CONNECTION LINE FROM D SUB TO U501 YES YES YES U201 POWER PIN8 114 3 3V U201 PIN122 123 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 4 5 Waveforms U201 122 123 U501 43 H SYNC 5 U501 44 V SYNC ...

Page 23: ... 4 TROUBLE IN DPM TROUBLE IN DPM NO NO TROUBLE IN PC CHECK PC PC IS NOT GOING INTO DPM OFF MODE TROUBLE H V SYNC LINE YES YES CHECK R756 R760 SYNC CHECK U501 PIN 19 6 6 Waveforms R756 H Sync 6 R760 V_Sync ...

Page 24: ... 21 EXPLODED VIEW 010 020 030 040 050 060 070 080 090 100 110 120 130 140 150 ...

Page 25: ...1 A5NQ LG PHILPS TFT COLOR LPL NJ BEF 3T TI D IC 250NITS SXGA LVDS For EUROPE U K or 6304FLP115A LCD LIQUID CRYSTAL DISPLAY LM170E01 A5K9 LG PHILPS TFT COLOR LVDS SXGA For EUROPE 3809TKL068J BACK COVER ASSEMBLY L1730B D WA LOCAL 3043TKK148E Base Assembly STAND BODY L1730_ PIVOT L G 3043TKK149A Base Assembly LXX30 STAND BASE H PIVOT _N 4951TKS137M METAL ASSEMBLY FRAME E CKD 4814TKK235C SHIELD INVER...

Page 26: ...2004 11 16 S AL LOC NO PART NO DESCRIPTION SPECIFICATION C723 0CK103CK51A 0 01UF 1608 50V 10 R TP B Y C724 0CK103CK51A 0 01UF 1608 50V 10 R TP B Y C725 0CK103CK51A 0 01UF 1608 50V 10 R TP B Y C726 0CK103CK51A 0 01UF 1608 50V 10 R TP B Y C727 0CK105CD56A 1UF 1608 10V 10 R TP X7R C728 0CK103CK51A 0 01UF 1608 50V 10 R TP B Y C732 0CK103CK51A 0 01UF 1608 50V 10 R TP B Y C733 0CK104CK56A 0 1UF 1608 50V...

Page 27: ...HM 1 10 W 5 1608 R TP R531 0RJ1000D677 100 OHM 1 10 W 5 1608 R TP R532 0RJ1000D677 100 OHM 1 10 W 5 1608 R TP R534 0RJ0000D677 0 OHM 1 10 W 5 1608 R TP R535 0RJ3301D677 3 3K OHM 1 10 W 5 1608 R TP R537 0RJ3301D677 3 3K OHM 1 10 W 5 1608 R TP R541 0RJ1000D677 100 OHM 1 10 W 5 1608 R TP R542 0RJ1000D677 100 OHM 1 10 W 5 1608 R TP R543 0RJ4701D677 4 7K OHM 1 10 W 5 1608 R TP R544 0RJ4701D677 4 7K OHM...

Page 28: ...HM 1 10 W 5 1608 R TP R822 0RJ0000D677 0 OHM 1 10 W 5 1608 R TP X501 6212AA2004A HC 49U TXC 12 0MHZ 30 PP LED1 0DLLT0340AA LITEON LTL 14CDJNHBP1 BK GRE SW2 140 058E SKHV10910B LGEC NON 12V 20A SW3 140 058E SKHV10910B LGEC NON 12V 20A SW6 140 058E SKHV10910B LGEC NON 12V 20A SW7 140 058E SKHV10910B LGEC NON 12V 20A SW8 140 058E SKHV10910B LGEC NON 12V 20A C1 0CK104CK56A 0 1UF 1608 50V 10 R TP X7R C...

Page 29: ... 26 SCHEMATIC DIAGRAM 1 SCALER 11 18 1 2 1 U201 33 30 28_RGB 2 U201 122 ...

Page 30: ... 27 2 MICOM 11 18 3 4 5 3 U501 17 22 4 U501 11 12 5 Q505 3 6 U502 5 6 6 ...

Page 31: ... 28 3 POWER 11 18 ...

Page 32: ... 29 4 CONNECTOR JACKS 8 7 7 J705 5V 5 6 12V 1 2 8 J703 5 8 J703 5 ...

Page 33: ...Blank Page ...

Page 34: ...Nov 2004 P NO 3828TSL084H Printed in Korea ...

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