LG FLATRON L1520B, Service Manual

Page 1: ...ail http www LGEservice com techsup html CAUTION BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL CHASSIS NO CL 66 MODEL L1520B L1520BN AL G Same model for Service Same looking with new chassis Issue Date 2004 8 To apply the Genesis ZAN3SL Chip ...

Page 2: ...1 ...

Page 3: ...ync Signal 1 Type Separate Sync Horizontal Vertical 2 Input Voltage Level Low 0 0 8V High 2 1 5 5V 3 Sync Polarity Positive or Negative 3 2 Video Input Signal 1 Type R G B Analog 2 Voltage Level 0 0 7 V a Color 0 0 0 Vp p b Color 7 0 0 35 Vp p c Color 15 0 0 7 Vp p 3 Input Impedance 75 Ω 3 3 Operating Frequency Horizontal 30 63kHz Vertical 56 75Hz 4 POWER SUPPLY 4 1 Power 100 240V 50 60Hz 0 6A 4 2...

Page 4: ...such as pencil or pen as this may result in damage to the panel 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 ci...

Page 5: ...t 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 c...

Page 6: ...ip 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 coatin...

Page 7: ...nnection 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 th...

Page 8: ...lution 640 x 350 720 x 400 640 x 480 640 x 480 640 x 480 640 x 480 800 x 600 800 x 600 800 x 600 800 x 600 832 x 624 1024 x 768 1024 x 768 1024 x 768 Total Period E 800 449 900 449 800 525 864 525 832 520 840 500 1024 625 1056 628 1040 666 1056 625 1152 667 1344 806 1328 806 1312 800 Video Active Time A 640 350 720 400 640 480 640 480 640 480 640 480 800 600 800 600 800 600 800 600 832 624 1024 76...

Page 9: ...S 5V 5V Power Inverter BRT CTL INV CTL gmZAN3SL ADC Scaling PLL OSD LVDS Transmitter Panel MCU EEPROM System LVDS Analog R G B D Sub To Key Control 3 3V VMOD 3 3 V 1 8 V Regulator 3 3 V 1 8 V Switch System 3 3V MOD ON 5V ...

Page 10: ... interpolates input to 1024 X768 resolution signal and outputs 8 bit R G B signal to transmitter 2 Power Part This part consists of the one 5V one 3 3V and one 1 8V regulators to convert power which is provided 5V in Power board 3 3V is provided for LCD panel and inverter 5V is provided for micom Also 5V is converted 3 3V and 1 8V by regulator Converted power is provided for IC in the main board 3...

Page 11: ... 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 12: ...isplay 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...

Page 13: ...INT AS OPENING EACH POWER LINE CHECK J707 VOLTAGE PIN5 PIN6 5V NO CHECK 5VR LINE OPEN CHECK CHECK Q803 PIN 3 3 3V U803 PIN 4 1 8V NO CHECK IIC LINE CONNECTION U501 U502 CHECK U201 VCC XTAL RESET IS U201 PIN88 VOLTAGE REPEATED AS PULSE SHAPE NO YES YES YES NO PROBLEM YES CHECK KEY CONTROL CONNECTOR ROUTINE 1 1 1 2 2 1 2 Waveforms J707 5 6 U801 1 U803 3 U201 88 ...

Page 14: ...TATE 2 CHECK MICOM DIM ADJ PORT U501 PIN41 J707 PIN1 5V NO LIPS CHECK PULSE AS CONTACTING SCOPE PROBE TO CAUTION LABEL CONTACT PROBE TO CAUTION LABEL CAN YOU SEE PULSE AT YOUR SCOPE NO REPLACE CCFL LAMP IN THE LCD MODULE YES YES YES YES 3 4 Waveforms J707 2 J707 2 1 3 4 Inverter Off Micom Port check J705 Inverter output Inverter On Micom Port check J705 Inverter output 1 J707 5 6 U801 1 U803 3 ...

Page 15: ...ATE AS 12MHZ CHECK CONNECTION LINE FROM U201 TO U501 TROUBLE IN CABLE OR LCD MODULE CHECK 5VR LINE U501 PIN8 5V YES YES YES YES 3 NO RASTER OSD IS NOT DISPLAYED gmZAN3SL NO RASTER OSD IS NOT DISPLAYED U501 PIN43 IS 48KHz H SYNC PIN44 IS 60Hz V SYNC IS PULSE APPEARED AT SIGNAL PINS NO NO NO 2 2 6 Waveforms U201 88 6 U501 43 44 ...

Page 16: ...OR LINE CHECK R G B INPUT U201 PIN 70 74 77 NO CHECK H SYNC LINE D SUB U501 U201 PIN95 CHECK H SYNC INPUT U201 PIN 95 NO YES YES YES CHECK V SYNC LINE D SUB U501 U201 PIN96 CHECK V SYNC INPUT U201 PIN 96 NO YES NO RASTER OSD IS DISPLAYED 4 NO RASTER OSD IS DISPLAYED gmZAN3SL TROUBLE IN LCD MODULE YES ...

Page 17: ...16 WIRING DIAGRAM J704 J706 J707 CN3 CN2 AC IN LET SOCKET P N 6620K00002C Connector Ass y P N 6631T11012R Connector Ass y P N 6631T20022G ...

Page 18: ...17 EXPLODED VIEW 010 020 050 060 070 080 090 110 120 030 040 140 130 100 ...

Page 19: ...SPRAY CKD 3550TKK395A COVER L1520 PIECE DECO 6871TST741C PWB PCB ASSEMBLY SUB L1520BN CONTROL TOTAL BRAND MX CKD 4951TKS112F METAL ASSEMBLY FRAME L1520BL LPL X08 CKD 6631T11012R CONNECTOR ASSEMBLY 20P H H 140MM UL20276 PANEL LINK CABLE LM567D 6871TPT234G PWB PCB ASSEMBLY POWER L1520SL POWER TOTAL POWERNET MODIFIED LIPS TO ANALOG DIMMING FOR LPL 3313TL5100E MAIN TOTAL ASSEMBLY L1520BN GMZAN3SL MX C...

Page 20: ...6V 20 FM2 5 T C832 0CE107EF628 100UF KMG RD 16V 20 FM2 5 T C833 0CK105CD56A 1UF 1608 10V 10 R TP X7R C834 0CC102CK41A 1000PF 1608 50V 5 R TP NP0 DATE 2004 8 24 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 0DZKE00...

Page 21: ...D677 0 OHM 1 10 W 5 1608 R TP R775 0RJ0682D677 68 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 ...

Page 22: ...SCHEMATIC DIAGRAM 21 1 SCALER L1520 L1720 ZAN3SL 1 2 5 U201 88 5 2 ...

Page 23: ... 22 2 MICOM L1520 L1720 MICOM 2 1 5K 17 6 U501 43 44 6 ...

Page 24: ... 23 3 POWER L1520 L1720 POWER 3 390 390 390 390 1 J707 5 6 U801 1 U803 3 1 1 ...

Page 25: ...4 4 CONNECTOR JACKS L1520 L1720 CONNECTOR JACKS 4 15K 4 J707 2 3 J707 2 1 J707 5 6 U801 1 U803 3 1 4 3 Inverter Off Micom Port check J705 Inverter output Inverter On Micom Port check J705 Inverter output ...

Page 26: ... 25 5 KEY ...

Page 27: ...Aug 2004 P NO 3828TSL085F Printed in Korea ...