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LG StudioWorks 570LE Service Manual

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COLOR MONITOR

SERVICE MANUAL

CHASSIS NO. : CL-06
MODEL:
StudioWorks 570LE / 570LS, LB570BZ
ID LABEL : LB570D-EA / LB570E-EA / LB570D-EN
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
Website:http://biz.LGservice.com
E-mail:http://www.LGEservice.com/techsup.html
Same looking with New Chassis
Issue Date: JULY 2000

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Summary of Contents for LG StudioWorks 570LE

  • Page 1: Color Monitor

    E-mail:http://www.LGEservice.com/techsup.html COLOR MONITOR SERVICE MANUAL CHASSIS NO. : CL-06 MODEL: StudioWorks 570LE / 570LS, LB570BZ ID LABEL : LB570D-EA / LB570E-EA / LB570D-EN CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. Same looking with New Chassis...
  • Page 2 Manufactured: Before JULY 2000 Manufactured: After JULY 2000 LG Electronics Inc. LG Electronics Inc. StudioWorks 570LE StudioWorks 570LE LG Twin Towers, 20, Yoido-Dong, LG Twin Towers, 20, Yoido-Dong, Youngdungpo-Gu, Seoul, 150-721, Korea. Youngdungpo-Gu, Seoul, 150-721, Korea. MODEL NO. : LB570BE MODEL NO.

  • Page 3: Table Of Contents

    CONTENTS SPECIFICATIONS ........... 2 DESCRIPTION OF BLOCK DIAGRAM....12, 14 PRECAUTIONS ............3 ADJUSTMENT ............15 TIMING CHART ............4 TROUBLESHOOTING GUIDE ......16 OPERATING INSTRUCTIONS ........ 5 PRINTED CIRCUIT BOARD........21 CONTROL LOCATIONS ......... 7 EXPLODED VIEW...........24 WIRING DIAGRAM ..........7 REPLACEMENT PARTS LIST .......26 DISASSEMBLY ............

  • Page 4: Precautions

    If the wires are pressed cause short and may • Do not modify original design without obtaining written burn or take fire. permission from LG or you will void the original parts and labor guarantee. CAUTION TAKE CARE DURING HANDLING THE LCD MODULE IF BRIGHTNESS OF THE LCD MODULE DARKEN, WITH BACKLIGHT UNIT.

  • Page 5: Timing Chart

    TIMING CHART VIDEO SYNC Total Video Blanking Sync Back Front Sync Frequency MODE H / V Resolution Period Active Time Duration Porch Porch Polarity Clock ( E ) Time ( A ) ( B ) ( D ) ( F ) ( C ) 25.175 31.468 KHz...

  • Page 6: Operating Instructions

    OPERATING INSTRUCTIONS FRONT VIEW REAR VIEW ID Label 15-pin D-Sub Signal Connector Front Control Panel Power ON/OFF Button Power Input Socket Power (DPMS) Indicator Front Control Panel Power ON/OFF Button OSD ON/OFF OSD Selection Brightness Power (DPMS) Indicator Button Buttons Control Buttons OSD Adjustment Auto Button...
  • Page 7 On-Screen-Display (OSD) Control Color Select To adjust an image size, position and operating To select color parameters are quick and easy with the On-Screen- temperature or set 9 3 0 0 K 6 5 0 0 K U s e r color level;...

  • Page 8: Control Locations

    CONTROL LOCATIONS Ref. No. Control Function POWER SWITCH AUTO BUTTON BRIGHTNESS MAIN PCB BRIGHTNESS OSD RIGHT OSD LEFT CONTROL PCB OSD ON/OFF WIRING DIAGRAM - 7 -...

  • Page 9: Disassembly

    DISASSEMBLY 1. TILT/SWIVEL REMOVAL 2. BACK COVER REMOVAL (1) Remove four screws (a). (1) Remove four screws (a) from the Back Cover. (2) Remove the Tilt/swivel. (2) Remove the Back Cover. Back Cover 3. TOP SHIELD & INVERTER SHIELD REMOVAL (1) Remove six screws (a).
  • Page 10 4. INVERTER, POWER, CONTROL, AND MAIN PCB ASSEMBLY REMOVAL (1) Disconnect J8, J2 and J7. (2) Remove four screws (a). (3) Remove the Main PCB Ass’y. (4) Disconnect CN2 and CN3. Front Cabinet (5) Remove two screws (b). (6) Remove the Inverter PCB Ass’y. (7) Remove two screws (c).

  • Page 11: Block Diagram

    BLOCK DIAGRAM System Block Diagram INVERTER PCB - 10 -...
  • Page 12 ector Conn +3.3VD +3.3VD2 +5VPLL +5VST sync Control - 11 -...

  • Page 13: Description Of Block Diagram

    DESCRIPTION OF BLOCK DIAGRAM FOR LB570D (570LE) 1. Video Amp & PLL & A/D Converter Circuit TDA8752 (U1) is one chip IC which it supports three function block of Video Amp, PLL and A/D converter. Video signal (0.7Vp.p) clamped through C6, 7, 16 inputs to U18’s R, G, and B pins. The signal level is 0.7Vac added 3Vdc.
  • Page 14 - 13 -...
  • Page 15 DESCRIPTION OF BLOCK DIAGRAM FOR LB570E (570LS) 1. Video Amp & PLL & A/D Converter Circuit TDA8752 (U1) is one chip IC which it supports three function block of Video Amp, PLL and A/D converter. Video signal (0.7Vp.p) clamped through C6, 7, 16 inputs to U18’s R, G, and B pins. The signal level is 0.7Vac added 3Vdc.

  • Page 16: Adjustment

    ADJUSTMENT All adjustment are thoroughly checked and corrected 2. Adjustment for White Balance when the monitor leaves the factory, but sometimes 1) Display color 0,0 pattern at Mode 13. several minor adjustment may be required. 2) Set External Bright to MAX position and Contrast to Adjustment should be following procedure and after MAX Position.

  • Page 17: Troubleshooting Guide

    TROUBLESHOOTING GUIDE 1. NO POWER NO POWER (POWER INDICATOR OFF) CHECK ADAPTER, AND FIND OUT CHECK J1’S A SHORT POINT VOLTAGE AS OPENING (24V) ? EACH POWER LINE CHECK CHECK U22, U11. U22 PIN5 VOLTAGE (5V) ? CHECK CHECK T1’S PRIMARY U17 Voltage COIL (OPEN CHECK) (5V) ?
  • Page 18 2. NO RASTER (OSD IS NOT DISPLAYED) – INVERTER NO RASTER (OSD IS NOT DISPLAYED) J4 PIN10 CHECK ADAPTER 24V? CHECK MICOM INV J4 PIN5 ON/OFF PORT. 1. CONFIRM BRIGHTNESS OSD CONTRL STATE. J4 PIN1 2. CHECK MICOM DIM-ADJ PORT CHECK PULSE AS CONTACTING SCOPE...
  • Page 19 3. NO RASTER (OSD IS NOT DISPLAYED) – MX88L284 NO RASTER (OSD IS NOT DISPLAYED) POWER PINS CHECK U2, U24 3.3V? 1. CHECK PIN34, 35 U5 PIN34, 35 SOLDERING CONDITION OSCILLATE AS 14.3M? 2. CHECK X1 3. TROUBLE IN U5 PIN2 IS 65MHz CLOCK? CHECK U5’S SOLDERING PIN4 IS 48KHz H-SYNC?
  • Page 20 4. NO RASTER (OSD IS DISPLAYED) – TDA8752BH NO RASTER (OSD IS DISPLAYED) POWER PIN CHECK U17, +5V U1 PIN3 CHECK U101 2.5V? CHECK 1. CHECK PC 2. CHECK SIGNAL CABLE R,G,B INPUT? & D-SUB CONNECTOR U1 PIN 12, 20, 28 LINE CHECK IIC PULSE ?
  • Page 21 4. NO RASTER (OSD IS DISPLAYED) – TDA8752BH / MX88L284 CHECK CHECK H-SYNC LINE OE(H-SYNC)? (D-SUB U8 MICOM U1 PIN87 U1 PIN95) CHECK CHECK SIGNAL LINE CLAMP INPUT(H-SYNC)? FROM U5 PIN11 U1 PIN89 TO U1 PIN89 CHECK CHECK SIGNAL LINE H-SYNC INPUT? FROM U2 PIN80 U5 PIN203...

  • Page 22: Printed Circuit Board

    PRINTED CIRCUIT BOARD 1. MAIN BOARD (Component Side) LB570B/C-VE C137 P/N :6870T270A12 DATE :2000.07.06 C264 CMF1 C149 CMF3 CMF4 CMF5 C158 BA10 BA18 BA19 BA17 BA16 BA15 BA13 BA11 BA20 BA21 BA14 BA12 BA22 BA23 BA24 C197 C199 C195 C144 C174 C126 C226...
  • Page 23 2. MAIN BOARD (Solder Side) TP14 - 22 -...
  • Page 24 3. CONTROL BOARD (Component Side) 4. CONTROL BOARD (Solder Side) - 23 -...
  • Page 25 - 24 -...

  • Page 26: Exploded View Parts List

    3091TKL002R CABINET ASS’Y, For StudioWorks 570LS 3091TKL002S LGC ABS HF350U CABINET ASS’Y, FOR LB570BZ (No-Brand) 3091TKL002Z LCD MODULE, TFT LCD LM151X1 15.1”, For StudioWorks 570LE 6304TLT151F LCD MODULE, TFT LCD LM151X2 15.1”, For StudioWorks 570LS 6304TLT151H MAIN FRAME 4951TKS061A INVERTER ASS’Y 6632Z-1502A MAIN PCB ASS’Y, For StudioWorks 570LE...

  • Page 27: Replacement Parts List

    REPLACEMENT PARTS LIST CAUTION: BEFORE REPLACING ANY OF THESE COMPONENTS, READ CAREFULLY THE SAFETY PRECAUTIONS IN THIS MANUAL. * NOTE SAFETY Mark AL ALTERNATIVE PARTS MODEL: StudioWorks 570LE/570LS DATE: 2000. 7. 20. LOC. NO. PART NO. DESCRIPTION / SPECIFICATION REMARK...
  • Page 28 MODEL: StudioWorks 570LE/570LS DATE: 2000. 7. 20. LOC. NO. PART NO. DESCRIPTION / SPECIFICATION REMARK 0CH6102K406 CAPACITOR, CHIP[CERAMIC LD-LESS TC], 1000PF 50V J SL 2012 R/TP 0CH6102K406 CAPACITOR, CHIP[CERAMIC LD-LESS TC], 1000PF 50V J SL 2012 R/TP 0CH8106J691 CAPACITOR, CHIP[AL. ELECTROLYTIC], 10UF 35V M 105STD (CYL) R/TP 0CH8107J611 CAPACITOR, CHIP[AL.
  • Page 29 MODEL: StudioWorks 570LE/570LS DATE: 2000. 7. 20. LOC. NO. PART NO. DESCRIPTION / SPECIFICATION REMARK C141 0CH6152K406 CAPACITOR, CHIP[CERAMIC LD-LESS TC], 1500PF 50V J SL 2012 R/TP C142 0CH3103K516 CAPACITOR, CHIP[CERAMIC LD-LESS HD], 10000PF 50V K B 2012 R/TP C143...
  • Page 30 MODEL: StudioWorks 570LE/570LS DATE: 2000. 7. 20. LOC. NO. PART NO. DESCRIPTION / SPECIFICATION REMARK C229 0CH3104K566 CAPACITOR, CHIP[CERAMIC LD-LESS HD], 0.1UF 50V K X 2012 R/TP C230 0CH6102K406 CAPACITOR, CHIP[CERAMIC LD-LESS TC], 1000PF 50V J SL 2012 R/TP C231 0CH3104K566 CAPACITOR, CHIP[CERAMIC LD-LESS HD], 0.1UF 50V K X 2012 R/TP...
  • Page 31 MODEL: StudioWorks 570LE/570LS DATE: 2000. 7. 20. LOC. NO. PART NO. DESCRIPTION / SPECIFICATION REMARK COILs & COREs 6210TCE001E CORE (CIRC), BEAD, HB-1M2012-800JT CERATEC 2012MM R/TP 6210TCE001P CORE (CIRC), BEAD, HB-1S2012-121JT CERATECH 2012MM R/TP 6210TCE001C CORE (CIRC), BEAD, HB-1T3216-500JT CERATEC 3216MM CHIP-BEAD...
  • Page 32 MODEL: StudioWorks 570LE/570LS DATE: 2000. 7. 20. LOC. NO. PART NO. DESCRIPTION / SPECIFICATION REMARK 0RH0222D622 RESISTOR, CHIP, 22 1/10W 5 D.R/TP 0RH1000D622 RESISTOR, CHIP, 100 1/10W 5 D.R/TP 0RH0222D622 RESISTOR, CHIP, 22 1/10W 5 D.R/TP 0RH0222D622 RESISTOR, CHIP, 22 1/10W 5 D.R/TP 0RH1000D622 RESISTOR, CHIP, 100 1/10W 5 D.R/TP...
  • Page 33 CAPACITOR, CHIP[CERAMIC LD-LESS HD], 0.1UF 50V K X 2012 R/TP 0IRH033200A IC, ROHM, BA033FP-E2 MOLD-3 TP REGULATOR MISCELLANEOUS 6304TLT151F LCD, “LGE TFT LCD LM151X1-C2MN 15.1” For StudioWorks 570LE 6304TLT151H LCD, “LGE TFT LCD LM151X2-C2MN 15.1” For StudioWorks 570LS P/CORD 6410TEW003C...

  • Page 34: Pin Configuration

    PIN CONFIGURATION MX88L284 Pin Configurations 104 GOUT1 103 GNDP GNDP 157 102 GOUT0 GND 158 MD15 159 101 LDTG MD14 160 100 LVSYNC MD13 161 99 LHSYNC MD12 162 98 RA0 MD11 163 97 RA1 MD10 164 96 RA2 MD9 165 95 RA3 MD8 166 94 RA4...
  • Page 35 TDA8752 Triple High Speed Analog-to-Digital Converter (ADC) Block Diagram TDA8752 - 34 -...
  • Page 36 Pin Description TDA8752 SYMBOL DESCRIPTION SYMBOL DESCRIPTION n.c. not connected scan test output DEC2 main regulator decoupling input C and 3W disable control input gain stabilizer voltage reference input select enable for 3-wire serial bus input DEC1 main regulator decoupling input C/3W serial data input n.c.
  • Page 37 Pin Description TDA8752 SYMBOL DESCRIPTION red channel ADC output bit 1 red channel ADC output bit 2 red channel ADC output bit 3 red channel ADC output bit 4 red channel ADC output bit 5 red channel ADC output bit 6 red channel ADC output bit 7 (MSB) red channel ADC output power supply CCOR...
  • Page 38 Sil100 Pin Configurations EXT_SWING SUPV PLLCK SYNC_CONT PLL_SYNC RSVD IDCK CEDGE SiI100 DEDGE 64-Pin TQFP (Top View) CTL3 CTL2 CTL1 CTL0 VSYNC HSYNC Block Diagram Swing EXT_SWING Control SUPV D[7:0] HSYNC D[23:0] TX0+ Encoder VSYNC TX0- HSYNC VSYNC D[15:8] CTL0 Data TX1+ Encoder...
  • Page 39 Pin Description Sil100 - 38 -...
  • Page 40 Pin Description Sil100 - 39 -...
  • Page 41 L4973V3-L4973V5 3.5A STEP DOWN SWITCHING REGULATOR L4973D3-L4973D5 Pin Configuration SYNC SYNC V5.1 V5.1 COMP COMP BOOT BOOT D94IN162A D94IN163A DIP18 SO20 Block Diagram V5.1 10(11) 16(18) 7(8) 8(9) CBOOT CHARGE INTERNAL ZERO CURRENT VREF 5.1V INTERNAL SUPPLY INHIBIT GOOD 5.1V REFERENCE 3.3V 17(19)
  • Page 42 L4973V3-L4973V5 L4973D3-L4973D5 PIN FUNCTIONS PIN DIP-18 PIN SO-20 NAME DESCRIPTION COMP E/A output to be used for frequency compensation A logic signal (active high) disables the device (sleep mode operation). If not used it must be connected to GND; if floating the device is disabled. BOOT A capacitor connected between this pin and the output allows to drive the internal D-MOS.
  • Page 43 TYPE PARTS TYPE PARTS Regulator Schottky Diode KA78M05R MBRS130T3 KA78M12R MBRS190T3 1. INPUT 2. GND 3. OUTPUT Transistor KSC1623 BA033FP 1. Vcc 1. BASE 2. GND 2. EMITTER 3. OUT 3. COLLECTOR - 42 -...

  • Page 44: Schematic Diagram

    SCHEMATIC DIAGRAM 1. TDA8752 (PRE-AMP/PLL/ADC) - 43 -...
  • Page 45 2. VIDEO PROCESS - 44 -...
  • Page 46 3. PANEL-LINK FOR 8 Bit - 45 -...
  • Page 47 4. MEMORY - 46 -...
  • Page 48 5. MICOM - 47 -...
  • Page 49 6. POWER GEN. - 48 -...
  • Page 50 7. CONNECTOR & JACKS - 49 -...
  • Page 51 PACKING AND ACCESSORIES Owner’s Manual Adaptor Power Cord Signal Cable Left Packing Right Packing - 50 -...
  • Page 52 Jul. 2000 P/NO : 3828TSL024H Printed in Korea...

This manual is also suitable for:

Studioworks 570lsStudioworks lb570bz

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