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LG StudioWorks 500E Service Manual

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COLOR MONITOR

SERVICE MANUAL

CHASSIS NO. : CA-133
FACTORY MODEL: 500EJ
MODEL: StudioWorks 500E
StudioWorks 500G
(
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
MENU
SELECT
E-mail:http://www.LGEservice.com/techsup.html
**
)
Same model for Service
Website:http://biz.LGservice.com
(500EJ-AL**M)
(500EJ-AL**A)
*Same looking with new chassis.
Issue Date; 2003. 5.

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  Summary of Contents for LG StudioWorks 500E

  • Page 1: Color Monitor

    Website:http://biz.LGservice.com E-mail:http://www.LGEservice.com/techsup.html COLOR MONITOR SERVICE MANUAL CHASSIS NO. : CA-133 FACTORY MODEL: 500EJ MODEL: StudioWorks 500E (500EJ-AL**M) StudioWorks 500G (500EJ-AL**A) Same model for Service CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. MENU SELECT *Same looking with new chassis.
  • Page 2: Table Of Contents

    CONTENTS SPECIFICATIONS ........... 2 ADJUSTMENT ............9 SAFETY PRECAUTIONS ........3 TROUBLESHOOTING GUIDE ......11 TIMING CHART ............4 EXPLODED VIEW........... 21 OPERATING INSTRUCTIONS ........ 5 REPLACEMENT PARTS LIST ....... 23 WIRING DIAGRAM ..........6 PIN CONFIGURATION........... 28 BLOCK DIAGRAM ........... 7 SCHEMATIC DIAGRAM .........
  • 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 Video Active Sync Duration Front Porch Total Period Blanking Time Back Porch Mode Resolution Frequency Time (A) Sort Polarity –...
  • Page 5: Operating Instructions

    OPERATING INSTRUCTIONS FRONT VIEW REAR VIEW ID Label MENU SELECT See Front Control Panel Power ON/OFF Button AC Power Socket Signal Connector Front Control Panel MENU SELECT 4. SET 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 P501(option) P701 P702 S + S P402 Socket P902 Signal Cable P302 P301 - 6 -...
  • Page 7: Block Diagram

    BLOCK DIAGRAM Dynamic Focus Static Focus Screen - 7 -...
  • Page 8: Description Of Block Diagram

    DESCRIPTION OF BLOCK DIAGRAM 1. Line Filter & Associated Circuit 7. D/D(DC to DC) Converter This is used for suppressing noise of power input line This circuit supplies DC voltage to the horizontal flowing into the monitor and/or some noise generated in deflection output circuit by increasing DC 50V which is the monitor flowing out through the power input line.
  • Page 9: Adjustment

    ADJUSTMENT 7) DIST. ADJ. → BALANCE command. GENERAL INFORMATION 8) Adjust parallelogram as arrow keys to be the best All adjustment are thoroughly checked and corrected condition. when the monitor leaves the factory, but sometimes 9) Adjust balance of pin-balance as arrow keys to be several adjustments may be required.
  • Page 10 5. Input EDID Data. 17-1) Adjust R-DRIVE and B-DRIVE command to white 1) Display color 15,0 cross hatch pattern at Mode 4. ± 0.003 and y=0.298 ± 0.003 on the balance x=0.283 2) EEPROM → Write EDID command and confirm White Balance Meter with PC arrow keys.
  • Page 11: 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 TROUBLE IN IC901 PIN 6 Q901 WAVEFORM CHECK TROUBLE IN D941, D942, D941, D942, D951, D951, D961, D971 D961, D971...
  • Page 12 2. NO CHARACTER NO CHARACTER CHECK TROUBLE IN IC302 P302 5V LINE PIN 18(5V) ? TROUBLE IN CHECK PC SIGNAL, IC302 PIN 5, 6, 7? P301 SIGNAL CABLE CHECK TROUBLE IN IC302 PIN 19, 20, 21 ? IC302 CHECK TROUBLE IN IC303 PIN 4 (80V) P303 12V LINE/ PIN 8 (12V) ?
  • Page 13 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 14: 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, Q720, D710 69KHZ 140V) ? CHECK TROUBLE IN Q705 COLLECTOR Q705 WAVEFORM?
  • Page 15 5. TROUBLE IN H-LINEARITY UNBALANCED OF H-LIN. CHECK TROUBLE IN IC401 IC401 (MICOM) PIN 6, 7, 8 ? 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 16 6. NO VERTICAL DEFLECTION NO V-DEFLECTION (ONE HORIZONTAL LINE) CHECK TROUBLE IN IC601 PIN 3 D951 15V LINE (15V+)? CHECK TROUBLE IN IC701 PIN 12, 13? IC701 12Pin 13Pin TROUBLE IN IC601, V-CIRCUIT - 16 -...
  • Page 17 7. TROUBLE IN OSD NO OSD (ENTER BUTTON MUST BE PRESSED.) CHECK TROUBLE IN IC302 B + 5V LINE (5V) ? DC 5V CHECK TROUBLE IN IC302 PIN 1, 24 IC401 PIN29 (V-FBP), WAVEFORM? IC701 PIN 1 LINE (H-FBP) Pin 1 Pin 24 TROUBLE IN OSD PERIPHERAL...
  • Page 18 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 19 9. NO DEGAUSSING NO DEGAUSSING (DEGAUSS ON THE OSD MENU MUST BE PRESSED.) CHECK TROUBLE IN IC401 PIN 5 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 20 10. NO TILT (NO ROTATION ) NO TILT (NO ROTATION) CHECK TROUBLE IN IC401 PIN21 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 21 - 21 -...
  • Page 22: Exploded View

    CABINET ASSEMBLY, CB553H BRAND B031 MPR-II - For Europe, India(500E) 3091TKB036V CABINET ASSEMBLY, CB553H BRAND B031 NON-MPR-II LG LOGO RED - For Chile, Mexico, Brazil, Panama(500G) 3091TKB036Z CABINET ASSEMBLY, CB553H BRAND B031 NON-MPR-II - For Australia, Indonesia, Southeast Asia, India, Europe(500G)
  • Page 23: 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. 05. 24. DATE: 2003. 05. 24. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC.
  • Page 24 DATE: 2003. 05. 24. DATE: 2003. 05. 24. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C907 0CKZTBU003C SC E 472M 14.0BW7 250V BK7.5 D722 0DSGF00019A 1N4148 GULF TP DO35 100V 0.1 C908 181-296K 150UF SMH,HC(25.4*30) 400V M...
  • Page 25 DATE: 2003. 05. 24. DATE: 2003. 05. 24. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION FB905 6210TCE003P BRS2550B BO SUNG 2550MM RADI R336 0RD3303Q609 330K 1/4W(3 5% TA52 FB906 6210TCE003P BRS2550B BO SUNG 2550MM RADI R337...
  • Page 26 DATE: 2003. 05. 24. DATE: 2003. 05. 24. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R606 0RD1000A609 100 OHM 1/2 W (7.0) 5% TA52 R766 0RD1501Q609 1.50K 1/4W(3 5% TA52 R607 0RN4701F409 4.70K 1/6W 1% TA52...
  • Page 27 DATE: 2003. 05. 24. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION SC901 6620TKB002A BAE EUN AC UNIVERSAL 3PIN BL SG305 6918TRT005A SSG-102-A0,1KV SMART RADIAL 140-058B EVQ PB2 05K MATUSHITA NON 12 140-058B EVQ PB2 05K MATUSHITA NON 12 140-058B EVQ PB2 05K MATUSHITA NON 12 140-058B...
  • Page 28: Pin Configuration

    PIN CONFIGURATION 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 SO8 (MN) Write Control 150mil Width Supply Voltage TSSOP8 (DW) 169mil Width Logic Dirgram Ground TDA4867J PHILIPS 32P, SDIP SYMBOL DESCRIPTION...
  • Page 29 TDA4841PS PHLIPS 32P HFLB FOCUS XRAY HSMOD HPLL2 BSENS HCAP HREF BDRV HBUF PGND HPLL1 HDRV SGND TDA4841PS XSEL VCAP VREF EWDRV VAGC VOUT2 VSMOD VOUT1 ASCOR VSYNC HSYBC CLBL HUNLOCK Pin Configuration EHT compensaton Block Diagram via vertical size EHT compensation via horizontal size 1.2V...
  • Page 30: Schematic Diagram

    SCHEMATIC DIAGRAM DDC-SDA IIC-SDA DDC-SCL IIC-SCL - 30 - - 31 -...
  • Page 31: Printed Circuit Board

    PRINTED CIRCUIT BOARD 1. MAIN BOARD (Component Side) 2. MAIN BOARD (Solder Side) - 32 - - 33 -...
  • Page 32 May. 2003 P/NO : 3828TSL092B Printed in Korea...

This manual is also suitable for:

Studioworks 500g