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COLOR MONITOR
SERVICE MANUAL
CHASSIS NO. : CA-111
FACTORY MODEL: T910BG
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
MENU
SELECT
Brightview
T910BU
(T910BG-UL)
T910B
(T910BG-EL)

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   Summary of Contents for LG T910BU

  • Page 1: Color Monitor

    COLOR MONITOR SERVICE MANUAL CHASSIS NO. : CA-111 FACTORY MODEL: T910BG T910BU (T910BG-UL) T910B (T910BG-EL) CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. MENU SELECT Brightview...

  • Page 2: Table Of Contents

    CONTENTS SPECIFICATIONS ........... 2 DESCRIPTION OF BLOCK DIAGRAM....10 SAFETY PRECAUTIONS ........3 ADJUSTMENT ............12 TIMING CHART ............4 TROUBLESHOOTING GUIDE ......14 OPERATING INSTRUCTIONS ........ 5 EXPLODED VIEW..........21 CONTROL LOCATIONS ......... 6 REPLACEMENT PARTS LIST ......23 WIRING 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 VESA Sync Polarity – Frequency 43.269 53.674 68.677 91.146 93.750 µs Total Period 23.112 18.631 14.561 10.971 10.666 µs Video Active Time 17.778 14.222 10.836...

  • Page 5: Operating Instructions

    FRONT VIEW REAR VIEW ID Label MENU SELECT Brightview 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 Brightview Buttons Brightiew Button Power Button 1. Power ON/OFF Button <Shortcut Keys>...

  • Page 6: Control Locations

    VR801 : High Voltage Adjustment (27kV) VR901: B Adjustment (190V Line)

  • Page 7: Wiring Diagram

    Anode Cap DY-Pin DY Assembly Screw P701 v ie P901 P201- P702 (Control PCB) P401 P451 P402...

  • Page 8: 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) Remove two screws (b) . 4) Release the latch (c). 5) Slide the Back Cover away from the Front Cabinet of the monitor. Tip Spec.

  • Page 9: Block Diagram

    SIGNAL VIDEO INPUT BRIGHTWINDOW (IC371)

  • Page 10: Description Of Block Diagram

    DESCRIPTION OF BLOCK DIAGRAM 1. Line Filter & Associated Circuit. 5. X-ray Protection. This is used for suppressing noise of power input line This circuit detects the rectified DC voltage comes flowing into the monitor and/or some noise generated from the FBT pin 4. If the high voltage of the FBT in this monitor flowing out through the power input reaches up to about 30kV (abnormal state), H.V control (IC802) detects.

  • Page 11

    11. D/D Drive & Convert Circuit. 19. Image Rotation (Tilt) Circuit. This circuit is used for supplying B + voltage to This circuit corrects the tilt of the screen by supplying horizontal deflection output transistor (Q801). This the image rotation signal to the tilt coil which is circuit makes to add side-pincushion correcting signal attached to the CDT near the deflection.

  • Page 12: Adjustment

    ADJUSTMENT GENERAL INFORMATION 3) EEPROM → ALL CLEAR → Y(Yes) command. All adjustment are thoroughly checked and corrected <Caution> Do not run this procedure unless the when the monitor leaves the factory, but sometimes EEPROM is changed. All data in EEPROM (mode several adjustments may be required.

  • Page 13

    ± 0.05FL of 5. Input EDID Data. 11) Adjust SUB-Brightness command to 0.4 1) Display color 15,0 cross hatch pattern at Mode 4. the raster luminance. 2) EEPROM → Write EDID command and confirm 12) Display color 15,0 Full White pattern(70x70mm) at mode 4.

  • Page 14: Troubleshooting Guide

    TROUBLESHOOTING GUIDE 1. NO POWER NO POWER (POWER INDICATOR OFF) CHECK TROUBLE IN FUSE OK? FUSE (F901) CHECK TROUBLE IN D901 BRIDGE DIODE BRIDGE DIODE? (D901) CHECK C905(+) VOLTAGE TROUBLE IN 145VDC at 110V input IC901 310VDC at 220V input CHECK TROUBLE IN D924, D926, D923,...

  • Page 15

    2. NO CHARACTER NO CHARACTER TROUBLE IN CHECK P301, SIGNAL CABLE, IC371 PIN 1, 2, 3 ? PC SIGNAL CHECK TROUBLE IN IC371 PIN 19, 20, 21 ? IC371, P302 PIN 10, 18(5V) ? CHECK TROUBLE IN IC302 PIN 18, 19, 20, IC302, P302 PIN 9 (5V) ? CHECK...

  • Page 16

    3. NO RASTER NO VIDEO (POWER INDICATOR GREEN or AMBER) CHECK AMBER POWER INDICATOR TROUBLE IN GREEN or AMBER ? P302 SIGNAL CABLE GREEN MIN. ROTATE SCREEN CHECK (Counter-clockwise) CONTROL KNOB TO SCREEN CONTROL CLOCKWISE KNOB OF FBT CHECK VOLTAGE AT D924/D926 CATHODE (190V) TROUBLE IN PRIMARY D923 CATHODE (80V)

  • Page 17: No Vertical Deflection

    4. NO VERTICAL DEFLECTION NO V-DEFLECTION (ONE HORIZONTAL LINE) CHECK TROUBLE IN IC601 Pin 2 T901 PIN 15 (15V) ? CHECK TROUBLE IN IC601 PIN 7 T701 PIN 4, D704 (40V)? CHECK TROUBLE IN IC801 PIN 13 IC801 (SAWTOOTH WAVE)? TROUBLE IN IC601, V-CIRCUIT - 17 -...

  • Page 18

    5. TROUBLE IN DPM STAND-BY/SUSPEND/ OFF MODE FAILURE CHECK CHECK PC, IC401 (MICOM) NO H / V SYNC SIGNAL (PC IS NOT GOING INTO PIN 40, 41 (H/V INPUT) DPM MODE) SIGNAL? INPUT H/V SYNC CHECK TROUBLE IN IC401 PIN 9, 8 X401, IC401 WAVEFORM? CHECK...

  • Page 19

    6. NO DEGAUSSING NO DEGAUSSING CHECK TROUBLE IN IC401 PIN 6 IC401 (MICOM) (5V)? CHECK TROUBLE IN Q920 COLLECTOR D925 VOLTAGE (0.5V)? CHECK TROUBLE IN P901? P901 CHECK TROUBLE IN RL901? RL901 TROUBLE IN TH901, DEGAUSSING COIL - 19 -...

  • Page 20

    7. TROUBLE IN OSD NO OSD CHECK TROUBLE IN IC301 PIN 4 P302 (5V) ? CHECK IC301 PIN 5 TROUBLE IN (NEGATIVE H-PULSE P302 COMES IN ?) CHECK IC301 PIN 10 TROUBLE IN (V-PULSE COMES IN?) P302 CHECK IC301 PIN 13, 14, 15 TROUBLE IN (IS THERE ANY SIGNAL IC301, IC401...

  • Page 21: Exploded View

    EXPLODED VIEW vi ew...

  • Page 22

    CABINET ASSEMBLY, E910BG BRAND C080 ER04 A-CORE SPRAY -(T910BG-UL) 3091TKC088B CABINET ASSEMBLY, T910BG BRAND TKC080 ACORE NO SPRAY -(T910BG-EL) 6318L19006A CDT(CIRC), M46QEF903X 13NHLD LG-PHILIPS 95KHZ 29.1MM FCDT TCO -(T910BG-UL) 6318L19001B CDT(CIRC), M46QEF903X 03N6LD LG-PHILIPS 95KHZ 29.1MM FLAT-(T910BG-EL) 3809TKC049A BACK COVER ASSEMBLY, E910B C047 EQ54(8C358) A-CORE PFC -For Europe(T910BG-UL), Europe, U.K(T910BG-EL)

  • 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. 1. 14. DATE: 2003. 1. 14. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC.

  • Page 24

    DATE: 2003. 1. 14. DATE: 2003. 1. 14. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C804 181-288D MKT 100V 473JTR PHS26473 C922 0CE227EN630 220UF KMG 100V M FM5 BULK C805 181-475E 222J 11.5*10.0*6.0*5.0 100V...

  • Page 25

    DATE: 2003. 1. 14. DATE: 2003. 1. 14. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION D802 0DS141489AB 1N4148 TP GRANDE DO-34 500MW IC302 0IPRPNS008A LM1267NA NATIONAL SEMICONDUC D803 0DS141489AB 1N4148 TP GRANDE DO-34 500MW IC303 0IPRPNS007A...

  • Page 26

    100 1/4W(3 5% TA52 Q771 0TR920009AB KSP92 TP SAMSUNG TO92 HIGH V R321 0RD1002Q609 10K 1/4W(3 5% TA52 Q801 0TR558900BA 2SC5589(LG,W/M) BK TOSHIBA TO3 R322 0RD1501Q609 1.50K 1/4W(3 5% TA52 Q802 0TR471009AA KSD471AC-Y TP SAMSUNG TO92 R323 0RD1102Q609 11K 1/4W(3 5% TA52...

  • Page 27

    DATE: 2003. 1. 14. DATE: 2003. 1. 14. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R423 0RD1000Q609 100 1/4W(3 5% TA52 R739 0RD3300Q609 330 1/4W(3 5% TA52 R424 0RN4701F409 4.70K 1/6W 1% TA52 R740 0RN1503G409...

  • Page 28

    DATE: 2003. 1. 14. DATE: 2003. 1. 14. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R871 0RX1800K607 180 OHM 2 W 5% TA62 SG303 6918TAT005E MTAS-201M GIGA AXIAL TAPING R872 0RD2401Q609 2.40K 1/4W(3 5% TA52...

  • Page 29: Pin Configuration

    PIN CONFIGURATION TDA4866J Current Driven Vertical Deflection Booster SYMBOL OUTB TDA4866J OUTB OUTA V FB GUARD OUTA FEEDB GUARD FEEDB M62501P /FP Teerminal Number and The facillty PIN CONFIGURATION(TOP VIEW) PIN NO. Symbol Functional Description PWM output terminal PWM OUT Power supply terminal Trigger Input terminal PWM OUT...

  • Page 30: Schematic Diagram

    DDC-SDA DDC-SCL...

  • Page 31

    1. CONTROL BOARD (Component Side) 2. CONTROL BOARD (Solder Side) 3. MAIN BOARD (Component Side) 4. MAIN BOARD (Solder Side)

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