LG StudioWorks E700B Service Manual
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LG StudioWorks E700B Service Manual

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COLOR MONITOR
SERVICE MANUAL
CHASSIS NO. : CA-109
FACTORY MODEL: EB770G
MODEL:
StudioWorks E700B
StudioWorks E700S
*(
) ID LABEL Model No.
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
MENU
SELECT
E-mail:http://www.LGEservice.com/techsup.html
E700S
(EB770G-NA)
E700S
(EB770G-NA)
Website:http://biz.LGservice.com
(EB770G-EA)
(EB770G-NA)

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  • Page 1 Website:http://biz.LGservice.com E-mail:http://www.LGEservice.com/techsup.html COLOR MONITOR SERVICE MANUAL CHASSIS NO. : CA-109 FACTORY MODEL: EB770G MODEL: StudioWorks E700B (EB770G-EA) StudioWorks E700S (EB770G-NA) E700S (EB770G-NA) E700S (EB770G-NA) ) ID LABEL Model No. CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

  • Page 2: Table Of Contents

    CONTENTS SPECIFICATIONS ........... 2 ADJUSTMENT ............11 SAFETY PRECAUTIONS ........3 TROUBLESHOOTING GUIDE ......13 TIMING CHART ............4 EXPLODED VIEW........... 23 OPERATING INSTRUCTIONS ........ 5 EXPLODED VIEW PARTS LIST......24 WIRING DIAGRAM ..........6 REPLACEMENT PARTS LIST ....... 25 DISASSEMBLY ............

  • Page 3: Safety Precautions

    SAFETY PRECAUTIONS SAFETY-RELATED COMPONENT WARNING! X-RADIATION There are special components used in this color monitor The only potential source of X-radiation is the picture tube. which are important for safety. These parts are marked However, when the high voltage circuitry is operating on the schematic diagram and the replacement properly there is no possibility of an X-radiation problem.

  • Page 4: Timing Chart

    TIMING CHART VIDEO SYNC << Dot Clock (MHz), Horizontal Frequency (kHz), Vertical Frequency (Hz), Horizontal etc... (µs), Vertical etc... (ms) >> Sync Total Period Video Active Sync Duration Front Porch Blanking Time Back Porch Mode Resolution Frequency Time (A) Polarity Sort –...

  • Page 5: Operating Instructions

    OPERATING INSTRUCTIONS FRONT VIEW REAR VIEW ID Label MENU SELECT Power ON/OFF Button AC Power Socket See Front Control Panel Signal Connector Front Control Panel MENU Button SELECT Button Power (DPMS) Indicator MENU SELECT Power Button Buttons Button 1. Power ON/OFF Button Use these buttons to choose or adjust items in the on Use this button to turn the monitor ON or OFF.

  • Page 6: Wiring Diagram

    WIRING DIAGRAM P201 P402 P405 P501 P702 P701 Socket P902 Signal Cable P302 P301 - 6 -...

  • Page 7: Disassembly

    DISASSEMBLY 1. TILT/SWIVEL & BACK COVER REMOVAL 1) Set the monitor face downward. 2) Pull the latch (a), carefully remove the Tilt/Swivel by pulling it upward. 3) Pressing the latch (b), Back cover by pushing it upward. 4) Release the latch (c). 5) Slide the Back Cover away from the Front Cabinet of the monitor.

  • Page 8: Block Diagram

    BLOCK DIAGRAM Dynamic Focus Static Focus Screen(G2) - 8 -...

  • Page 9: Description Of Block Diagram

    DESCRIPTION OF BLOCK DIAGRAM 1. Line Filter & Associated Circuit. 6. Horizontal and Vertical Oscillation. This is used for suppressing noise of power input line This circuit generates the horizontal pulse and the vertical flowing into the monitor and/or some noise generated in pulse by taking the H and V sync signal.
  • Page 10 14. H & V Blanking and Brightness Control. 16. Video Pre-Amp Circuit. Blanking circuit eliminates retrace line by supplying This circuit amplifies the analog video signal from 0-0.7V negative pulse to the G1 of the CRT. And Brightness to 0-4V. It is operated by taking the clamp, R, G, B drive circuit is used for control of the screen brightness by and contrast signal from the Micom(IC401).

  • Page 11: Adjustment

    ADJUSTMENT GENERAL INFORMATION 7) Adjust tilt as arrow keys to be the best condition. All adjustment are thoroughly checked and corrected 8) DIST. ADJ. → BALANCE command. when the monitor leaves the factory, but sometimes several adjustments may be required. 9) Adjust parallelogram as arrow keys to be the best Adjustment should be following procedure and after condition.
  • Page 12 14) Set Brightness and Contrast to Max position. 5. Input EDID Data. 1) Display color 15,0 cross hatch pattern at Mode 4. 15) Set SUB-CONTRAST Max 127(7F) (decimal) position. 2) EEPROM → Write EDID command and confirm 16) Set B-DRIVE to 100(64) at DRIVE of the alignment “EDID Write OK!!”...

  • Page 13: Troubleshooting Guide

    TROUBLESHOOTING GUIDE 1. NO POWER NO POWER (POWER INDICATOR OFF) CHECK TROUBLE IN FUSE FUSE OK? (F901) (F901) CHECK C908 VOLTAGE? TROUBLE IN D900 (AC120V: 160VDC, AC220V: 304VDC) CHECK IC901 PIN 6 TROUBLE IN WAVEFORM (SQUARE WAVE IC901 COMES OUT?) CHECK TROUBLE IN D941, D942, D951,...
  • Page 14 2. NO CHARACTER NO CHARACTER CHECK TROUBLE IN IC302 P302 5V LINE PIN 9 (5V) ? TROUBLE IN CHECK PC SIGNAL, IC302 PIN 5, 6, 7 ? P301 SIGNAL CABLE CHECK TROUBLE IN IC302 PIN 18, 19, 20 ? IC302 CHECK TROUBLE IN IC303 PIN 4 (80V)
  • Page 15 3. NO RASTER NO VIDEO (POWER INDICATOR ON) CHECK ORANGE DPM MODE POWER INDICATOR (NO H and/or V SYNC) GREEN or ORANGE? GREEN CHECK TROUBLE IN D712 ANODE D712 (-157V)? CHECK TROUBLE IN G1 VOLTAGE? Q799 (-55 ~ -15V) CHECK TROUBLE IN CDT HEAT D941, Q942, Q941...
  • Page 16 4. NO HORIZONTAL DEFLECTION NO H-DEFLECTION (ONE VERTICAL LINE) CHECK TROUBLE IN Q706? Q706 CHECK TROUBLE IN B + VOLTAGE 50V LINE (50V)? CHECK T701(FBT) PIN 2 TROUBLE IN (31KHZ, 60V Q719, Q720, D710 69KHZ, 140V ? CHECK TROUBLE IN Q701 COLLECTOR Q701 WAVEFORM?
  • Page 17 5. TROUBLE IN H-LINEARITY UNBALANCED OF H-LIN. CHECK TROUBLE IN IC401 IC401 (MICOM) PIN 5, 6, 7 ? CHECK TROUBLE IN Q711~Q716? Q711 ~ Q716 CHECK TROUBLE IN L703? L703 Cs SIGNAL TABLE HORIZONTAL FREQUENCY(fH) TROUBLE IN 30K ~ 33.9K C722, C723, C726, C729 34K ~ 38.9K 39K ~ 44.9K...
  • Page 18 6. NO VERTICAL DEFLECTION NO V-DEFLECTION (ONE HORIZONTAL LINE) CHECK TROUBLE IN IC601 PIN 3 R603 15V LINE (15V)? TROUBLE IN CHECK HIGH-VOLTAGE OUT IC601 PIN 7 CIRCUIT(FBT), (40V)? D721, R606 CHECK TROUBLE IN IC701 PIN 12, 13? IC701 TROUBLE IN IC601, V-CIRCUIT - 18 -...
  • Page 19 7. TROUBLE IN OSD (ENTER BUTTON MUST BE PRESSED.) NO OSD CHECK TROUBLE IN IC301 B + ? 5V LINE DC 5V CHECK TROUBLE IN IC301 PIN 5, 10 IC601 PIN8 (V-FBP), WAVEFORM? T701 40V LINE (H-FBP) Pin 10 Pin 5 CHECK TROUBLE IN IC301 PIN 12...
  • Page 20 8. TROUBLE IN DPM (NO OFF MODE.) OFF MODE FAILURE CHECK CHECK PC, IC401 (MICOM) INPUT H/V SYNC SIGNAL (PC IS NOT GOING INTO PIN 31, 32 (H/V INPUT) DPM OFF MODE) SIGNAL? H/V SYNC CHECK TROUBLE IN IC401 PIN 13 X401 WAVEFORM? 24MHz...
  • Page 21 9. NO DEGAUSSING NO DEGAUSSING (DEGAUSS ON THE OSD MENU MUST BE PRESSED.) CHECK TROUBLE IN IC401 PIN 19 IC401 (MICOM) (0V)? CHECK TROUBLE IN Q953 COLLECTOR Q953 VOLTAGE? DC 15V CHECK TROUBLE IN P902 ? P902 CHECK TROUBLE IN RL901? RL901 TROUBLE IN...
  • Page 22 10. NO TILT (NO ROTATION ) NO TILT (NO ROTATION) CHECK TROUBLE IN IC401 PIN 21 IC401 ( MI COM) WAVE FORM ? CHECK TROUBLE IN 15V LINE 15V LINE, 6.3V LINE AND 6.3V LINE ? CHECK TROUBLE IN Q503 EMITTER Q501~Q503 VOLTAGE ? TROUBLE IN...

  • Page 23: Exploded View

    - 23 -...

  • Page 24: Exploded View Parts List

    EXPLODED VIEW PARTS LIST Ref. No. Part No. Description 3091TKC067A CABINET ASSEMBLY, EB770F(LG CDT) BRAND C062 PC+ABS,85964, S/WE700B (EB770G-EA) 3091TKC067M CABINET ASSEMBLY, EB770F BRAND C062 AF320T,85964, S/WE700S (EB770G-NA) 3091TKC067P CABINET ASSEMBLY, EB770F BRAND C062 320T,85964, E700S (EB770G-NA) 3091TKC067L CABINET ASSEMBLY, EB770F BRAND C062 320T, FLATRON E700S (EB770G-NA) 2423GC4E95A CDT(CIRC), M41QEE903X 01NLGD FOR NORTHERN HEMISPHERE (EB770G-EA), (EB770G-NA ;...

  • Page 25: 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: (EB770G-EA), (EB770G-NA) DATE: 2002. 1. 10. MODEL: (EB770G-EA), (EB770G-NA) DATE: 2002. 1. 10. *S *AL LOC. NO. PART NO.
  • Page 26 MODEL: (EB770G-EA), (EB770G-NA) DATE: 2002. 1. 10. MODEL: (EB770G-EA), (EB770G-NA) DATE: 2002. 1. 10. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C740 0CE227EL630 220UF KMG 63V M FM5 BULK D307 0DS124409AA 1SS244 TP ROHM KOREA...
  • Page 27 MODEL: (EB770G-EA), (EB770G-NA) DATE: 2002. 1. 10. MODEL: (EB770G-EA), (EB770G-NA) DATE: 2002. 1. 10. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION ZD301 0DZ560009AG GDZJ5.6B TP GRANDE DO-34 500MW FB705 6210TCE003L BAS3580T BO SUNG 3580MM AXIAL5 FB901...
  • Page 28 MODEL: (EB770G-EA), (EB770G-NA) DATE: 2002. 1. 10. MODEL: (EB770G-EA), (EB770G-NA) DATE: 2002. 1. 10. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R314 0RD1000Q609 100 1/4W(3 5% TA52 R432 0RD1000Q609 100 1/4W(3 5% TA52 R315 0RD1000Q609...
  • Page 29 1.50K 1/4W(3 5% TA52 SW207 140-058D SKHV10911A LGEC NON 12 20 HORI R798 0RD2001Q609 2K 1/4W(3 5% TA52 T701 6174T11003E “1054A,CB777G LG-PHILIPS 17””” R799 0RD1502Q609 15K 1/4W(3 5% TA52 T702 6170TCZ006A EE2218 2.3 MH D/FOCUS(CB775C), R801 0RD1802Q609 18K 1/4W(3 5% TA52...

  • Page 30: Pin Configuration

    PIN CONFIGURATION S3P863A P0.0/INT0 P3.7 P0.1/INT1 P3.6 P0.2/INT2 P3.5 P0.3 P3.4 P0.4/TM0CAP P3.3/AD3 P0.5 P3.2/AD2 P0.6 P3.1/AD1 P0.7 P3.0/AD0 P1.0/SDA1 S3C8639 P1.1/SCL1 P2.7/Csync-I (SOG) /C863A Hsync-I (42-SDIP) Vsync-I Vsync-O TEST (GND) Hsync-O SDA0 Clamp-O SCL0 P2.6/PWM6 RESET P2.5/PWM5 P1.2 P2.4/PWM4 P2.0/PWM0 P2.3/PWM3 P2.1/PWM1...
  • Page 31 LM1269 110 MHz I C RGB Video Amplifier System with OSD & DACs Block and Connection Diagram To Other Video Channels R OSD H Blank H Flyback Analog/ Digital Contrast Clamp DC G OSD Clamp Restore Amp B OSD Select Hi Z Input R Video R Out...
  • Page 32 M24C08 Serial I C BUS EEPROM SYMBOL DESCRIPTION PSDIP8 (BN) 0.25mm Frame E0-E2 Chip Enable Input Serial Data Address Input/Output Serial Clock Write Control SO8 (MN) 150mil Width Supply Voltage Logic Dirgram TSSOP8 (DW) Ground 169mil Width TDA4866J Current Driven Vertical Deflection Booster SYMBOL OUTB TDA4866J...
  • Page 33 TDA4857 Autosync Deflection Controller HFLB FOCUS XRAY HSMOD HPLL2 BSENS HCAP HREF BDRV HBUF PGND HPLL1 HDRV SGND TDA4857 XSEL VCAP VREF EWDRV VAGC VOUT2 VSMOD VOUT1 VSYNC HSYNC CLBL HUNLOCK Pin Configuration SYMBOL DESCRIPTION SYMBOL DESCRIPTION Horizontal Flyback Input H-Synchronization Unlock/Protection/V-Blanking Output HFLB HUNLOCK...
  • Page 34 BLOCK DIAGRAM FOR TDA4853/4857 - 34 -...
  • Page 35 TYPE PARTS TYPE PARTS 2N3904 KTA1275 KTC3206 KTD1413 IRFS630A KTA1270 DTC114E KTC200-Y KTC3198 KTC3202 1: GND 2: OUT 3: IN KSC5803 KSD882Y 1: EMITTER 1: BASE 2: COLLECTOR 2: COLLECTOR 3: BASE 3: EMITTER KSP44 KSP92 1: EMITTER 2: BASE 1 2 3 1: EMITTER 3: COLLECTOR...

  • Page 36: Schematic Diagram

    IIC-SDA IIC-SCL DDC-SDA DDC-SCL...

  • Page 37: Printed Circuit Board

    PRINTED CIRCUIT BOARD 1. CONTROL BOARD (Component Side) 2. CONTROL BOARD (Solder Side) 3. MAIN BOARD (Component Side) 4. MAIN BOARD (Solder Side) - 38 - - 39 -...
  • Page 38 Jan. 2002 P/NO : 3828TSL078A Printed in Korea...

This manual is also suitable for:

Studioworks e700sFlatron e700sE700sEb770g-eaEb-770g-na

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