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LG Flatron T530B Service Manual

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COLOR MONITOR

SERVICE MANUAL

CHASSIS NO. : CA-138
MODEL:
(
) **Same model for Service
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
Website:http://biz.LGservice.com
E-mail:http://www.LGEservice.com/techsup.html
T530B
(T530BL-AL****)
(T530SL-AL****)
T530S
*Same looking with new chassis.
Issue Date; 2004. 9.

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Summary of Contents for LG Flatron T530B

  • Page 1: Color Monitor

    Website:http://biz.LGservice.com E-mail:http://www.LGEservice.com/techsup.html COLOR MONITOR SERVICE MANUAL CHASSIS NO. : CA-138 MODEL: T530B (T530BL-AL****) (T530SL-AL****) T530S ) **Same model for Service CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. *Same looking with new chassis. Issue Date; 2004. 9.

  • Page 2: Table Of Contents

    CONTENTS SPECIFICATIONS ........... 2 DESCRIPTION OF BLOCK DIAGRAM....11 SAFETY PRECAUTIONS ........3 ADJUSTMENT ............13 SERVICE PRECAUTION.......... 4 TROUBLESHOOTING GUIDE ......19 TIMING CHART ............7 EXPLODED VIEW........... 34 DISASSEMBLY ............8 REPLACEMENT PARTS LIST ....... 36 WIRING DIAGRAM ..........9 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: Service Precaution

    SERVICING PRECAUTIONS CAUTION: Before servicing receivers covered by this 9. Use with this receiver only the test fixtures specified in service manual and its supplements and addenda, read this service manual. and follow the SAFETY PRECAUTIONS on page 3 of this CAUTION: Do not connect the test fixture ground strap publication.
  • Page 5 General Soldering Guidelines Replacement 1. Use a grounded-tip, low-wattage soldering iron and 1. Carefully insert the replacement IC in the circuit board. appropriate tip size and shape that will maintain tip 2. Carefully bend each IC lead against the circuit foil pad and solder it.
  • Page 6 Circuit Board Foil Repair At Other Connections Excessive heat applied to the copper foil of any printed Use the following technique to repair the defective copper circuit board will weaken the adhesive that bonds the foil pattern at connections other than IC Pins. This technique to the circuit board causing the foil to separate from or involves the installation of a jumper wire on the "lift-off"...

  • Page 7: Timing Chart

    TIMING CHART VIDEO SYNC << Dot Clock (MHz), Horizontal Frequency (kHz), Vertical Frequency (Hz), Horizontal etc... (µs), Vertical etc... (ms) >> MODE VESA Polarity H-Frequency 31.470 37.500 48.363 53.680 H-Active (A) 31.780 26.670 20.677 18.630 H-Video(B) 25.420 20.320 15.754 14.220 H-blanking(C) 6.360 6.350...

  • Page 8: Disassembly

    DIS A S S E MB LY 1. T IL T /S WIV E L & B A C K C OV E R R E MOV A L 1) S et the monitor face downward. 2) C arefully remove the T ilt/S wivel by pulling it upward. 3) Remove the screw (b), B ack cover by pus hing it upward.

  • Page 9: Wiring Diagram

    WIR ING DIA G R A M P 203 P 201 P 202 P 405 P 501 P 701 P 702 S + S P 402 S ocket P 902 S ignal C able P 302 P 301 - 9 -...

  • Page 10: Block Diagram

    BLOCK DIAGRAM Dynamic Foc us Static Focus Screen - 10 -...

  • Page 11: Description Of Block Diagram

    DESCRIPTION OF BLOCK DIAGRAM 1. SMPS(Switching Mode Power Supply) 6. X-RAY Protection Circuit When you turn on the power switch, the operating When the high Voltage reaches to 29kV in an abnormal case, fprocedure is as follows: the high voltage detector circuit, R818,D721,C739-1 R416, C409 start operation to shut down high voltage circuit.
  • Page 12 15. Video Pre-Amp Circuit. 16. Video Output Amp Circuit. This circuit amplifies the analog video signal from 0~0.7 V This circuit amplifies the video signal which comes from the to 0~4 V. It is operated by taking the clamp, R,G,B drive video pre-amp circuit and amplified it to applied the CDT and contrast signal from the MICOM (IC401) cathode...

  • Page 13: Adjustment

    ADJUSTMENT 1. Preparation for Service Adjustment 2. Adjustment by Service Hot key How to enter SVC HOT KEY GENERAL INFORMATION 1. Press Menu and OSD window will appear. 2. While OSD window is displayed, is seen on the All adjustment are thoroughly checked and corrected left bottom of OSD window.
  • Page 14 4. Distortion 10. Parallelogram Scanning frequency : All Mode (Mode 1~4) Display image : Crosshatch pattern Horizontal : 10 Row Vertical : 8 Row 11. Adjustment of white balance (Adjustment of chromaticity diagram) *(Adjustment of white balance must be made after entering Hot Key Mode and DEGAUSS.) 2.0mm, 2.0mm...
  • Page 15 11-2. Adjustment of White Balance PROCEDURE After finishing adjustment of cut off (back raster), For trained and experienced service technicians only. approve "Color(15.0) Full white pattern". Use the following procedure to correct minor color Adjust BDRV Data = 85(55) purity problems: SCON=127.
  • Page 16 3. Adjustment Using Service software Program 2. Adjustment for White Balance and Luminance. (Adjustment Program) 1) Set the White Balance Meter. 2) Press the DEGAUSSING on the OSD menu for 1. Adjustment for Factory Mode (Preset Mode). demagnetization of the CDT. 3) Display color 0,0 pattern at Mode 4.
  • Page 17 4. EDID Data Edit Using Service software Program 4.1 Read and Modify EDID Data 1) Connector the monitor and adjust device as Figure1 2) Display color 15,0 cross hatch pattern at Mode 4. 3) Use EDIT – MODEL SEL. command to select the right model info file. 4) Use EDIT –...
  • Page 18 Figure 1. Cable Connection Figure 1. Cable Connection VIDEO Compatible PC SIGNAL GENERATOR - 18 - PARALLEL PORT Power inlet (required) Power Select Switch 4.7K (110V/220V) 4.7K Power LED 74LS06 4.7K 74LS06 ST Switch V-Sync On/Off Switch (Switch must be ON.) - 18 -...

  • Page 19: Troubleshooting Guide

    TROUBLESHOOTING GUIDE 1. NO POWER NO POWER (POWER INDICATOR OFF) TROUBLE CHECK IN FUSE (F901) FUSE OK?(F901) SMPS Switch (ON, OFF) CHECK TROUBLE IN D900 BRIDGE DIODE? BRIDGE DIODE (D900) CHECK C908(+) VOLTAGE TROUBLE IN 145VDC at 110V input IC901, Q901 310VDC at 220V input IC901, Q901 CHECK...
  • Page 20 2. NO CHARACTER NO CHARACTER TROUBLE IN CHECK P301, SIGNAL CABLE, IC302 PIN 5,6,7 PC SIGNAL CHECK TROUBLE IN IC302 PIN 1, 24, 23, 19, 20, 21 IC302, P301 PIN 18 (5V) ? CHECK IC303 PIN 1, 2, 3 TROUBLE IN PIN8 (8V), IC303 PIN 4 (80V) ?
  • Page 21 3. NO RASTER NO VIDEO (POWER INDICATOR GREEN or FLASH) CHECK FLASH TROUBLE IN POWER INDICATOR P302 SIGNAL CABLE GREEN or FLASH ? GREEN CHECK ROTATE SCREEN CONTROL SCREEN CONTROL KNOB TO CLOCKWISE KNOB OF FBT or COUNTER CLOCKWIES CHECK VOLTAGE AT D961 CATHODE (50V) TROUBLE IN PRIMARY...

  • Page 22: No Vertical Deflection

    4. NO VERTICAL DEFLECTION NO V-DEFLECTION (ONE HORIZONTAL LINE) CHECK TROUBLE IN IC601 Pin 3 (13V) ? T90113V Line CHECK TROUBLE IN IC601 PIN 7 (45V)? T701 40V line CHECK TROUBLE IN IC401 PIN 33, 34 IC401 (SAWTOOTH WAVE)? TROUBLE IN IC601, V-CIRCUIT Waveforms IC401, #33...
  • Page 23 5. TROUBLE IN DPM Stand-by/SUSPEND/ DPMS OFF MODE FAILURE CHECK CHECK PC, INPUT H/V SYNC SIGNAL IC401 (MICOM) (PC IS NOT GOING INTO DPM PIN 52, 53 (H/V INPUT) MODE) SIGNAL? NO H/V SYNC SIGNAL CHECK TROUBLE IN IC401 PIN 45, 46 X401, IC401 WAVEFORM? CHECK...

  • Page 24: No Degaussing

    6. NO DEGAUSSING NO DEGAUSSING CHECK TROUBLE IN IC401 PIN 4 (5V)? IC401 (MICOM) CHECK TROUBLE IN Q953 COLLECTOR D953 VOLTAGE (0.5V)? CHECK TROUBLE IN P902? P902 TROUBLE IN CHECK RL901 RL901? TROUBLE IN TH901, DEGAUSSING COIL - 24 -...
  • Page 25 7. H_Deflection Failure 1. Check IC401 Pins 39,40,41 IC401 Pin 18 waveform is right? 2. Replace IC401. Q719 drain Check Q720,50V LINE waveform is right? D710 Q705 drain Check Q704 waveform is right? Check 13V Line. Check and replace T703 Q706 base, collector and Q706.Check DY connector waveforms are right?
  • Page 26 9. TROUBLE IN H-LINEARITY UNBALANCED OF H-LIN. CHECK TROUBLE IN IC401 IC401 (MICOM) PIN 11, 12 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, C726, C729 39K ~ 43.9K 44K ~ 48.9K...
  • Page 27 10. Abnormal H_Size The Voltage Repeat the troubleshooting waveform Q706 Collector Guide of H_deflection failure. is right? T701 pin 2 voltage Check D/D converter circuit is change with H frequency? Check IC401 B+ control circuit. 11. Side Pin or Trap Failure Check if AC Voltage of IC401 Pin 35 Check and replace IC401.
  • Page 28 13. Tilt Failure(optional) Check tilt connector connection IC401 Pin 26 output duty varies with Check and replace IC401. different DAC values? Q501 Emitter output varies Check Q503,Q501,Q502. with different DAC values? Check and replace CRT. 14. V Size or Pos. Variation Failure IC401 Pin 33, 34 Check some parts around IC401.

  • Page 29: High Voltage Failure

    15. High Voltage Failure Q719 drain Check Q719,Q720 waveform is right? Check 50V line Repeat the troubleshooting Q706 collecter waveform Guide of H_deflection failure. is right? Replace T701 Waveforms Q719, Drain Q706,Collector 16. ABL Failure Input full white pattern to monitor. IC302 Pin22 Check and replace IC302 input exists and varies...

  • Page 30: Micom Failure

    17. Micom Failure IC401 Pin 16 input is over Check Q903,D908,ZD902 4.2V? IC401 Pin 45 and 46 Check X401 inputs are right? Check and replace IC401 Pin 23 input is R451,C408 High Active? All in/output values are Replace IC401. right? Done.

  • Page 31: Missing Color

    19. User Control Failure Check connector Ass’y. IC401 Pins 27 and 28 Check and replace function key. inputs are right at each function? Check and replace IC401. Done. 20. Missing Color Proper Video levels are Check signal generator and on P301 Pin 1, 3 and 5. signal cable.

  • Page 32: Purity Failure

    21. Visible Retrace Check white balance adjustment. G2 voltage is right? Check G2 control volume and FBT. Blank pedestal is on Check IC302 Pin 19, 20 and 21 of IC302 and related components. Check Q799 Is V_FLB and DC_bias on and related components.

  • Page 33: Poor Focus

    23. Misconvergence Degauss the CDT Adjust Pole4,Pole6 Done to improve the misconvergence Change CRT and readjust convergence. Done. 24. Poor Focus Adjust focus VR. Aging monitor and Improved focus? check for focus change. Check focus leads from FBT to CRT Socket. Check the CRT Socket.
  • Page 34 - 34 -...

  • Page 35: Exploded View Parts List

    CABINET ASSEMBLY, T530 BRAND TKB043A(FOR NT) 3091TKB055A CABINET ASSEMBLY, T530 BRAND 043A(FOR SP) 3091TKB055E CDT(CIRC), M36QFP503X01 QDDD LG-PHILIPS DISPLAY 54KHZ 29.1MM FCDT EQUATOR NON-MPR WITHOUT TILT 6318L15022C CDT(CIRC), M36QFP803X01 NDDD LG-PHILIPS DISPLAY 54KHZ 29.1MM FCDT MPR WITHOUT TILT 6318L15022A BACK COVER ASSEMBLY, T530 B032 320T 8C358...

  • Page 36: Replacement Parts List

    REPLACEMENT PARTS LIST CAUTION: BEFORE REPLACING ANY OF THESE COMPONENTS, READ CAREFULLY THE SAFETY PRECAUTIONS IN THIS MANUAL. * NOTE : S SAFETY Mark AL ALTERNATIVE PARTS MODEL :T530BL/T530SL DATE:2005.03.11 MODEL :T530BL/T530SL DATE:2005.03.11 PART NO. DESCRIPTION/SPECIFICATON LOC NO LOC NO PART NO.
  • Page 37 MODEL :T530BL/T530SL DATE:2005.03.11 MODEL :T530BL/T530SL DATE:2005.03.11 LOC NO PART NO. DESCRIPTION/SPECIFICATON LOC NO PART NO. DESCRIPTION/SPECIFICATON C 9 4 3 6 8 7 1 T M A A 0 4 C 560P 1KV K B TS 1A 30A 2USSEC 5.0UA C 9 5 1 6 8 7 1 T M H A 7 2 C 1000UF SHL 16V M FM5 BULK...
  • Page 38 MODEL :T530BL/T530SL DATE:2005.03.11 MODEL :T530BL/T530SL DATE:2005.03.11 PART NO. DESCRIPTION/SPECIFICATON PART NO. DESCRIPTION/SPECIFICATON LOC NO LOC NO F B 3 1 3 6 8 7 1 T M A A 0 4 C BAS2550T BO SUNG 2550MM AXIAL52MM R 3 0 1 6 8 7 1 T M A A 0 4 C 75 1/4W(3 5% TA52 F B 7 0 1...
  • Page 39 MODEL :T530BL/T530SL DATE:2005.03.11 MODEL :T530BL/T530SL DATE:2005.03.11 PART NO. DESCRIPTION/SPECIFICATON PART NO. DESCRIPTION/SPECIFICATON LOC NO LOC NO R 4 4 4 6 8 7 1 T M A A 0 4 C 470 OHM 1/4 W (3.4) 5% TA52 R 9 0 7 6 8 7 1 T M A A 0 4 C 39K 1/4W(3 5% TA52 R 4 4 5...

  • Page 40: Schematic Diagram

    SCHEMA TIC DIAGRAM 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. Q901, Drain IC901, #6 IC401, #45 IC401, #46 IC401, #18 IC401, #35 IC401, #33 IC401, #34 IC401, #52...

  • Page 41: Printed Circuit Board

    PRINTED CIRCUIT BOARD 2. CONTROL BOARD (Solder Side) 1. CONTROL BOARD (Component Side) 3. MAIN BOARD (Component Side) 4. MAIN BOARD (Solder Side) - 42 - - 43 -...
  • Page 42 Mar. 2005 P/NO : 3828TSL109Q Printed in China...

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Flatron t530s

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