Gateway EV730 Service Manual
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Gateway EV730 Service Manual

Gateway EV730 Service Manual

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COLOR MONITOR

SERVICE MANUAL

CHASSIS NO. : CA-119
FACTORY MODEL: CG773H
MODEL: EV730
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
Gateway
MENU
SELECT
EV730

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Summary of Contents for Gateway EV730

  • Page 1: Color Monitor

    COLOR MONITOR SERVICE MANUAL CHASSIS NO. : CA-119 FACTORY MODEL: CG773H MODEL: EV730 CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. EV730 Gateway MENU SELECT...

  • Page 2: Table Of Contents

    CONTENTS SPECIFICATIONS ........... 2 ADJUSTMENT ............10 SAFETY PRECAUTIONS ........3 TROUBLESHOOTING GUIDE ......12 TIMING CHART ............4 EXPLODED VIEW........... 22 OPERATING INSTRUCTIONS ........ 5 REPLACEMENT PARTS LIST ....... 24 WIRING DIAGRAM ..........6 PIN CONFIGURATION........... 29 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 FACTORY PRESET MODE MODE MARK MODE 1 MODE 2 MODE 3 MODE 4 MODE 5 MODE 6 MODE 7 MODE 8 — — — — Sync Polarity Frequency 31.469 37.500 31.470 37.879 46.875 48.363 60.023 63.981 15.630 Total Period 31.778...

  • Page 5: Operating Instructions

    OPERATING INSTRUCTIONS FRONT VIEW REAR VIEW ID Label EV730 Gateway MENU SELECT Power ON/OFF Button See Front Control Panel AC Power Socket Signal Connector Front Control Panel EV730 Gateway 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 P402 P501 P701 S + S P702 Socket P902 Signal Cable P302 P301 - 6 -...

  • Page 7: Block Diagram

    BLOCK DIAGRAM Dynamic Focus Static Focus Screen(G2) - 7 -...

  • Page 8: 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 9 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 10: 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 11 18) COLOR ADJ. → LUMINANCE → ABL command. 13) Set Contrast and SUB-Contrast to 200(C8) position. ± 1FL of the luminance. 14) Set B-DRIVE to 150(96) at DRIVE of the alignment 19) Adjust ABL to 35 program. 20) Exit from the program. 15) Adjust R-DRIVE and G-DRIVE command to white 5.

  • Page 12: 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, D941, D942, D951,...
  • Page 13 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/...
  • Page 14 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 15 4. NO HORIZONTAL DEFLECTION NO H-DEFLECTION (ONE VERTICAL LINE) TROUBLE IN CHECK Q706? Q706 CHECK TROUBLE IN B + VOLTAGE 50V LINE (50V)? CHECK T701(FBT) PIN 2 TROUBLE IN (31KHZ 60V, Q719, Q703, Q704,D710 69KHZ 140V) ? CHECK TROUBLE IN Q705 COLLECTOR Q705 WAVEFORM?
  • Page 16 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 17 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 - 17 -...
  • Page 18 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 19 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 SIGNAL CHECK TROUBLE IN IC401 PIN 13 X401 WAVEFORM? 24MHz...
  • Page 20 9. NO DEGAUSSING NO DEGAUSSING (DEGAUSS ON THE OSD MENU MUST BE PRESSED.) CHECK TROUBLE IN IC401 PIN 1 IC401 (MICOM) (0V)? CHECK TROUBLE IN Q953 COLLECTOR Q953 VOLTAGE(15V)? CHECK TROUBLE IN P902 ? P902 CHECK TROUBLE IN RL901? RL901 TROUBLE IN TH901, DEGAUSSING COIL...
  • Page 21 10. NO TILT (NO ROTATION ) NO TILT (NO ROTATION) CHECK TROUBLE IN IC401PIN 21 IC401 ( MI COM) WAVE FORM ? CHECK 13V LINE TROUBLE IN 15V LINE, 6.3V LINE AND 6.3V LINE ? CHECK TROUBLE IN Q503 EMITTER Q501~Q503 VOLTAGE ? TROUBLE IN...

  • Page 22: Exploded View

    EXPLODED VIEW 14-2 14-1 10-2 10-1...

  • Page 23: Exploded View Parts List

    SCREW ASSEMBLY, TAPTITE P TYPE D5.0 L25.0 MSWR/FZMY . 6140TC3004A COIL, DEGAUSSING, 1090MM 16.5OHM 0.4MM 110T 17" WITH EARTH 6174T11004A FBT (FLY BACK TRANSFORMER), 1055A, CB777H LG-PHILIPS 17"/70KHZ FST 6620TKB002A SOCKET(CIRC), POWER, BAE EUN AC UNIVERSAL 3PIN BLACK 4950TKS155Q METAL, SHIELD BOTTOM "N"CKD CG773H...

  • Page 24: 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: 2002. 09. 13. DATE: 2002. 09. 13. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC.
  • Page 25 DATE: 2002. 09. 13. DATE: 2002. 09. 13. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C907 0CKZTTA003C SC E 472M 14.0FF7 250V TP7.5 D721 0DS141489AB 1N4148 TP GRANDE DO-34 500MW C908 0CEZTBU002D 180UF 25.4*35 SMH/HC 400V M V...
  • Page 26 DATE: 2002. 09. 13. DATE: 2002. 09. 13. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION FB904 125-155K BFS3550A0FG SAMWHA 3.5*5.0MM R319 0RD1000Q609 100 1/4W(3 5% TA52 FB905 125-155P BFS2550R2FG SAMWHA 2.5*5.0MM R320 0RD1000Q609 100 1/4W(3 5% TA52...
  • Page 27 DATE: 2002. 09. 13. DATE: 2002. 09. 13. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R494 0RD1001Q609 1K 1/4W(3 5% TA52 R749 0RD2201Q609 2.20K 1/4W(3 5% TA52 R495 0RD1001Q609 1K 1/4W(3 5% TA52 R750 0RD3001Q609...
  • Page 28 140-058B EVQ PB2 05K MATUSHITA NON 12 140-058B EVQ PB2 05K MATUSHITA NON 12 140-058B EVQ PB2 05K MATUSHITA NON 12 T701 6174T11004A “1055A, CB777H LG-PHILIPS 17””/” T702 6170TCZ006A EE2218 2.3 MH D/FOCUS(CB775C) T703 6170TCZ001D EI2218 4.0MH H-DRIVE,EB770G T901 6170TMZ138A...

  • Page 29: Pin Configuration

    PIN CONFIGURATION STV9211 Pin Configuration Pin Description - 29 -...

  • Page 31: Schematic Diagram

    DDC-SDA IIC-SDA IIC-SCL DDC-SCL NOTICE Since this is a basic schematic diagram. The value of components and some partial connection are sucject to be changed for improvement without notice.
  • Page 32 1. MAIN BOARD (Component Side) 2. MAIN BOARD (Solder Side)

  • Page 33: Printed Circuit Board

    STV9556 Pin Configuration OUT1 OUT2 OUT3 GNDP GNDS GNDA BLOCK DIAGRAM...

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