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IBM E50 LG CB553H Service Manual
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IBM E50 LG CB553H Service Manual

IBM E50 LG CB553H Service Manual

Color monitor
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IBM E50 LG CB553H

COLOR MONITOR

SERVICE MANUAL

CHASSIS NO. : CA-120
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS
IN THIS MANUAL.
MENU
SELECT

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Summary of Contents for IBM E50 LG CB553H

  • Page 1: Color Monitor

    IBM E50 LG CB553H COLOR MONITOR SERVICE MANUAL CHASSIS NO. : CA-120 CAUTION BEFORE SERVICING THE UNIT, MENU SELECT READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

  • 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........... 27 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 7: Block Diagram

    105V <OSD DISPLAY> Heater ( 6.3V ) Signal H-Sync Sig CONTRAST Cable VIDEO V-Sync Sig VIDEO BRIGHTNESS PRE-AMP H / V POSITION MAIN AMP C DATA(SDA) H / V SIZE (IC302) (IC303) C CLOCK(SCL) UP/BOTTOM-CORNER OSD TIME PINCUSHION MICOM TRAPEZOID OSD IC SCL / SDA PIN BALANCE...

  • 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

    - Install the cable for adjustment such as Figure 1and run 4) Set Brightness and Contrast to Max position. the alignment program on the DOS for IBM compatible PC. 5) Display color 0,0 pattern at Mode 6. - Set external Brightness and Contrast volume to max position.
  • 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 6. ± 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) (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, D951,...
  • Page 12 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)
  • Page 13 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 (-75 ~ -15V) CHECK TROUBLE IN CDT HEAT D941, Q942, Q941...

  • 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, 65V Q719, Q720, D710 54KHZ, 120V ? CHECK TROUBLE IN Q701 COLLECTOR Q701 WAVEFORM?

  • Page 15: Trouble In H-Linearity

    5. TROUBLE IN H-LINEARITY UNBALANCED OF H-LIN. CHECK TROUBLE IN IC401 IC401 (MICOM) PIN 5, 6? CHECK TROUBLE IN Q712, Q713 Q712, Q713, Q715, Q716 Q715, Q716? CHECK TROUBLE IN L703? L703 Cs SIGNAL TABLE TROUBLE IN HORIZONTAL C722, C726, C729 FREQUENCY(fH) 30K ~ 33.9K 34K ~ 38.9K...

  • Page 16: No Vertical Deflection

    6. NO VERTICAL DEFLECTION NO V-DEFLECTION (ONE HORIZONTAL LINE) CHECK TROUBLE IN IC601 PIN 2 13V LINE (13V)? CHECK TROUBLE IN IC601 PIN 4 -10V LINE (-10V)? CHECK TROUBLE IN IC701 PIN 5, 23? IC701 TROUBLE IN IC601, V-CIRCUIT - 16 -...
  • Page 17 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 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? NO H/V SYNC CHECK TROUBLE IN IC401 PIN 13 X401 WAVEFORM? 6MHz...

  • Page 19: No Degaussing

    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? DC 13V 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 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 21: Exploded View

    EXPLODED VIEW 11-2 11-1...

  • Page 22: Exploded View Parts List

    EXPLODED VIEW PARTS LIST Part No. Ref. No. Description 3091TKB048E CABINET ASSEMBLY, CB553H BRAND B031 IBM E50 9930 320T SP LOCAL 6318G15001A CDT(CIRC), M36QAW351X 122 SAMSUNG 61KHZ 29.1MM FST MPR or 2423GB0A8AX CDT(CIRC), M36LBL803X 31RLLA LG-PHILIPS DISPLAYS 54KHZ 29.1 MM...

  • 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. 03. 28. DATE: 2003. 03. 28. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC.
  • Page 24 DATE: 2003. 03. 28. DATE: 2003. 03. 28. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C915 0CK6810K515 680P 50V K B TS D905 0DRGF00109A GUF10M GULF TP DO41 1000V 1A C917 0CK1020K515 1000PF 50V K B TR...
  • Page 25 DATE: 2003. 03. 28. DATE: 2003. 03. 28. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION L903 6200J00003A RH3.5*5.0 BOSUNG TP R344 0RD1000Q609 100 1/4W(3 5% TA52 R351 0RD2200A609 220 OHM 1/2 W (7.0) 5% TA52 TRANSISTOR R352 0RD2200A609...
  • Page 26 DATE: 2003. 03. 28. DATE: 2003. 03. 28. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R708 0RD1102Q609 11K 1/4W(3 5% TA52 R809 0RX0101K665 1 OHM 2 W 5% SF R709 0RN1002F409 10K 1/6W 1 TA52...

  • Page 27: Pin Configuration

    PIN CONFIGURATION S1D2519X01 DEFLECTION PROCESSOR FOR MULTISYNC MONITORS BLOCK DIAGRAM...
  • Page 28 STV9211 Pin Configuration Pin Description...
  • Page 31 1. MAIN BOARD (Component Side) 2. MAIN BOARD (Solder Side)

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