LG Flatron E701S Service Manual
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LG Flatron E701S Service Manual

LG Flatron E701S Service Manual

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COLOR MONITOR

SERVICE MANUAL

CHASSIS NO. :
CL-119
MODEL:
(
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
E701S
) **Same model for Service
(ES774H-AL**M)
*Same looking with new chassis.

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  • Page 1: Color Monitor

    COLOR MONITOR SERVICE MANUAL CHASSIS NO. : CL-119 MODEL: E701S (ES774H-AL**M) ) **Same model for Service CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. *Same looking with new chassis.

  • 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 Power ON/OFF Button AC Power Socket See Front Control Panel Signal Connector Front Control Panel 5. SELECT (or SET) Button 1. Power Button Use this button to enter a selection in the on Use this button to turn the monitor ON or OFF.
  • Page 6 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 7: Wiring Diagram

    WIRING DIAGRAM P201 P402 P405 P501 P701 P702 Socket P902 Signal Cable P302 P301 - 7 -...

  • Page 8: Block Diagram

    105V OSD CONTROL Heater ( 6.3V ) Signal BRIGHTNESS H-Sync Sig Cable VIDEO CONTRAST VIDEO V-Sync Sig H/V POSITION PRE-AMP MAIN AMP H/V SIZE C DATA(SDA) (IC302) (IC303) SPCC STV9211 C CLOCK(SCL) TRAPEZOID STV9556 PIN BALANCE PARALLELOGRAM OSD IC MICOM ROTATION (IC301) SCL / SDA...

  • 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 15. Image Rotation (Tilt) Circuit. 17. Video Output Amp Circuit. This circuit corrects the tilt of the screen by supplying the This circuit amplifies the video signal which comes from image rotation signal to the tilt coil which is attached near the video pre-amp circuit and amplified it to applied the the deflection yoke of the CRT.

  • Page 11: Adjustment

    ADJUSTMENT GENERAL INFORMATION All adjustment are thoroughly checked and corrected 10) Adjust balance of pin-balance as arrow keys to be when the monitor leaves the factory, but sometimes the best condition. several adjustments may be required. 11) DIST. ADJ. FOS. ADJ command. Adjustment should be following procedure and after 12) Adjust V-SIZE as arrow keys to 230 ±...
  • Page 12 17-1) Adjust R-DRIVE and G-DRIVE command to white 4. Input EDID Data. 1) Display color 15,0 cross hatch pattern at Mode 4. balance x=0.283 ± 0.003 and y=0.298 ± 0.003 on the 2) EEPROM Write EDID command and confirm White Balance Meter with PC arrow keys. “EDID Write OK!!”...

  • Page 13: Troubleshooting Guide

    TROUBLESHOOTING GUIDE 1. NO POWER NO POWER (POWER INDICATOR OFF) CHECK TROUBLE IN FUSE FUSE OK? (F901) CHECK C908 VOLTAGE? TROUBLE IN (AC120V: 160VDC, D900 AC220V: 304VDC) CHECK Q901 PIN 6 TROUBLE IN WAVEFORM (SQUARE WAVE Q901 COMES OUT?) CHECK TROUBLE IN D941, D942, D951, D941, D942,...
  • Page 14 2. NO CHARACTER NO CHARACTER CHECK TROUBLE IN IC302 P302 5V LINE PIN 7(5V) ? TROUBLE IN CHECK PC SIGNAL, IC302 PIN 1, 3, 5? P301 SIGNAL CABLE CHECK TROUBLE IN IC302 PIN 14, 16, 18 ? IC302 CHECK TROUBLE IN IC303 PIN 7 (105V) P303 12V LINE/ PIN 3 (13V) ?
  • Page 15 3. NO RASTER NO VIDEO (POWER INDICATOR ON) CHECK AMBER DPM MODE POWER INDICATOR (NO H and/or V SYNC) GREEN or AMBER? GREEN CHECK TROUBLE IN D712 ANODE D712 (-160V)? CHECK TROUBLE IN G1 VOLTAGE? Q799 (-55V~ -15V) CHECK TROUBLE IN CDT HEAT D941, Q942, Q941 VOLTAGE? (6.3V)

  • Page 16: No Horizontal Deflection

    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, Q703, D704, D710 69KHZ 140V) ? CHECK TROUBLE IN Q705 COLLECTOR Q705 WAVEFORM?

  • Page 17: Trouble In H-Linearity

    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) 30K ~ 33.9K TROUBLE IN 34K ~ 38.9K C722, C723, C726, C729 39K ~ 43.9K...
  • Page 18 6. NO VERTICAL DEFLECTION NO V-DEFLECTION (ONE HORIZONTAL LINE) CHECK TROUBLE IN IC601 PIN 2 D610 13V+ LINE (13V+)? CHECK TROUBLE IN IC701 PIN 23? IC701 TROUBLE IN IC601, V-CIRCUIT...
  • Page 19 7. TROUBLE IN OSD (ENTER BUTTON MUST BE PRESSED.) NO OSD CHECK TROUBLE IN IC301 B + 5V LINE (5V) ? DC 5V CHECK TROUBLE IN IC301 PIN 5, 10 IC601 PIN1 (V-FBP), WAVEFORM? T701 40V LINE (H-FBP) Pin 10 Pin 5 CHECK TROUBLE IN...
  • 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 30, 31 (H/V INPUT) DPM OFF MODE) SIGNAL? H/V SYNC CHECK TROUBLE IN IC401 PIN 13 X401 WAVEFORM? 24MHz...

  • Page 21: No Degaussing

    9. NO DEGAUSSING (DEGAUSS ON THE OSD MENU MUST BE PRESSED.) NO DEGAUSSING CHECK TROUBLE IN IC401 PIN 1 IC401 (MICOM) (0V)? CHECK TROUBLE IN Q953 COLLECTOR Q953 (15V) 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 PIN21 IC401 ( MI COM) WAVE FORM ? CHECK TROUBLE IN 13V LINE 15V LINE, 6.3V LINE AND 6.3V LINE ? CHECK TROUBLE IN Q503 EMITTER Q501~Q503 VOLTAGE ? TROUBLE IN...

  • Page 23: Exploded View

    EXPLODED VIEW...

  • Page 24: Exploded View Parts List

    Ref. No. Part No. Description 3091TKC079A CABINET ASSEMBLY, ES774G BRAND C069 MPR-2 6318L17012C CDT(CIRC), M41QEE903X 01Q6UD LG-PHILIPS 85KHZ 29.1MM FLAT TCO 3809TKC035K BACK COVER ASSEMBLY, EB770F C035 AF320T,85964,LG CORE 3043TKK081D TILT SWIVEL ASSEMBLY, EB770F T057/B046 60HR,85964,IOMG 339-002J SCREW ASSY, PHP+5*25 (FZMW1)+GW18 6140TC3004B COIL,DEGAUSSING, 75D-437 GET 0.4MM,120T,19 OHM,EB770F,WITH EARTH...

  • 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 DATE: 2003. 5. 7. DATE: 2003. 5. 7. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC.
  • Page 26 DATE: 2003. 5. 7. DATE: 2003. 5. 7. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C802 0CE106CK638 10UF SHL,SD 50V M FM5 TP 5 D710 0DR400409AC UF4004 GULF TP DO41 400V 1A C805 0CE106CK638 10UF SHL,SD 50V M FM5 TP 5...
  • Page 27 DATE: 2003. 5. 7. DATE: 2003. 5. 7. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION RESISTORs FB306 6210TCE003A BRD3510B BO SUNG 3510MM RADI FB314 6210TCZ001J BAS3550T0(125-022J) BO SUNG J302 0RD0471Q609 4.70 1/4W(3 5% TA52 FB315...
  • Page 28 DATE: 2003. 5. 7. DATE: 2003. 5. 7. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R408 0RD1300Q609 130 1/4W(3 5% TA52 R722 0RD1001Q609 1K 1/4W(3 5% TA52 R409 0RD1000Q609 100 1/4W(3 5% TA52 R723 0RD1001Q609...
  • Page 29 DATE: 2003. 5. 7. DATE: 2003. 5. 7. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R802 0RD1502Q609 15K 1/4W(3 5% TA52 SW206 140-058D SKHV10911A LGEC NON 12 20 HO R803 0RD2001Q609 2K 1/4W(3 5% TA52...

  • Page 30: Pin Configuration

    PIN CONFIGURATION LOW-COST I 2 C CONTROLLED DEFLECTION PROCESSOR FOR MULTISYNC MONITORS STV6888 - 30 -...
  • Page 31 Horizontal position Pin cushion asymm. Parallelogram Hor. duty cycle H-moirØ am plitude Control voltage level B+ ref. Functions controlled via I C Bus VDyCor amplitude H size Pin cushion Keystone Vertical size Top corners Vertical position S-correction Vertical moirØ Bottom corners C-correction...
  • Page 32 STV9211 Pin Configuration Pin Description...
  • Page 34 STV9556 Pin Configuration OUT1 OUT2 OUT3 GNDP GNDS GNDA BLOCK DIAGRAM 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...

  • Page 35: Schematic Diagram

    DDC-SDA IIC-SDA DDC-SCL IIC-SCL 1050V...
  • Page 36 1. CONTROL BOARD (Component Side) 2. CONTROL BOARD (Solder Side) 3. MAIN BOARD (Component Side) 4. MAIN BOARD (Solder Side)

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Flatron e701s (es774h-al**m)

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