LG StudioWorks N2200P Service Manual
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LG StudioWorks N2200P Service Manual

LG StudioWorks N2200P Service Manual

Color monitor
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COLOR MONITOR

SERVICE MANUAL

CHASSIS NO. : CA-94
FACTORY MODEL: NB230A
MODEL: StudioWorks N2200P
*(
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
E-mail:http://www.LGEservice.com/techsup.html
) ID LABEL Model No.
Website:http://biz.LGservice.com
(NB230A-UA)

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  • Page 1: Color Monitor

    Website:http://biz.LGservice.com E-mail:http://www.LGEservice.com/techsup.html COLOR MONITOR SERVICE MANUAL CHASSIS NO. : CA-94 FACTORY MODEL: NB230A MODEL: StudioWorks N2200P (NB230A-UA) ) ID LABEL Model No. CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

  • Page 2: Table Of Contents

    CONTENTS SPECIFICATIONS ........... 2 DESCRIPTION OF BLOCK DIAGRAM....14 ADJUSTMENT ............16 SAFETY PRECAUTIONS ........3 TROUBLESHOOTING GUIDE ......17 TIMING CHART ............4 EXPLODED VIEW..........25 OPERATING INSTRUCTIONS ........ 5 REPLACEMENT PARTS LIST ......27 CONTROL LOCATIONS ........11 PIN CONFIGURATION ...........38 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 parts properly there is no possibility of an X-radiation problem.

  • Page 4: Timing Chart

    TIMING CHART VIDEO SYNC VESA MODE MARK MODE 1 MODE 2 MODE 3 MODE 4 MODE 5 MODE 6 MODE 7 MODE 8 MODE 9 Sync Polarity — — Frequency 53.674 31.469 60.023 68.677 79.976 91.146 93.750 106.250 121.950 µs Total Period 18.631 31.778...

  • Page 5: Operating Instructions

    OPERATING INSTRUCTIONS FRONT VIEW REAR VIEW AC IN D-SUB D-Sub Power ON/OFF Signal Connector Button Front Control Panel AC Power Socket Power Indicator BNC Connector Front Control Panel 1. Power ON/OFF Button Buttons This button is used to turn the monitor ON and OFF. Use these buttons to choose or adjust items in the on screen display.
  • Page 6 5. Select (or SET) Button 7. INPUT Button Use this button to enter a selection in the on screen Use this button to make Dsub or BNC connector display. active. This feature is used when two computers are connected to the display. The default setting is Dsub. 6.
  • Page 7 SIZE SHAPE Vertical Size H. Linearity To adjust the image height. To adjust the horizontal width of edge of the image. Horizontal Size V. Linearity To adjust the vertical width of edge of the image. To adjust the image width. Recall SHAPE You can use this function to reload the modified parameters for...
  • Page 8 SETUP SPECIAL DEGAUSS NATURAL COLOR AUTO SIZING SHARPNESS VIDEO LEVEL This item is used to select the monitor's MOIRE input signal level. The normal level used for PURITY most PCs is 0.7V. CONVERGENCE If the screen becomes suddenly washed- out or blurred, please select 1.0V and try again.

  • Page 9: Usb Connection

    Making use of USB (Universal Serial Bus)* USB (Universal Serial Bus) is an innovation in connecting your different desktop peripherals conveniently to your computer. By using the USB, you will be able to connect your mouse, keyboard, and other to your monitor instead of having to connect them to your computer.
  • Page 10 Using the BNC connector with other types of video cards Using the BNC connectors with other types of video cards. Follow the example that fits your needs. 1. In case of using a composite sync on green video signal(Sync On Green): Connect each R,G and B video signals to BNC receptacles on the back of the monitor.

  • Page 11: Control Locations

    CONTROL LOCATIONS VR501: High Voltage Adjustment VR711: RASTER CENTERING VR951: B Adjustment (195V) - 11 -...

  • Page 12: Wiring Diagram

    WIRING DIAGRAM Anode Cap to P611 to P601 P305 P303 P306 to P631 P201 to P651 P207 P202 Degaussing P203 to P661 Coil P904 P703 P901 P702 P701 P903 P704 P601 P611 P952 P951 P101 P820 P661 P651 P631 P102 P103 P104 - 12 -...

  • Page 13: Block Diagram

    BLOCK DIAGRAM EBRT UMUTE Degaussing Coil - 13 -...

  • Page 14: Description Of Block Diagram

    DESCRIPTION OF BLOCK DIAGRAM 1. Line Filter & Associated Circuit 6. Micom (Microprocessor) Circuit. This is used for suppressing noise of power input line The operating procedure of Micom (Microprocessor) flowing into the monitor and/or some noise generated and its associated circuit is as follows: in this monitor flowing out through the power input 1) H and V Sync signal is supplied from the D-sub to the line.
  • Page 15 14. H-Linearity Correction Circuit. 20. Moiré Reduction Circuit. This circuit corrects the horizontal linearity for each This circuit reduce interference between the periodical horizontal sync frequency. display pattern and the CRT’s slot (or dot). The positions of every other one dot video signal beams 15.

  • Page 16: Adjustment

    ADJUSTMENT GENERAL INFORMATION ± All adjustment are thoroughly checked and corrected 8) Adjust H-SIZE as arrow keys to 390 2mm. when the monitor leaves the factory, but sometimes 9) Adjust H-POSITION as arrow keys to center of the several adjustments may be required. screen.

  • Page 17: Troubleshooting Guide

    TROUBLESHOOTING GUIDE 1. NO POWER NO POWER (POWER INDICATOR OFF) CHECK TROUBLE IN FUSE OK? FUSE (F901) CHECK C905 (+) VOLTAGE? TROUBLE IN (400VDC AT INPUT D901 VOLTAGE 220VAC) CHECK Q901 DRAIN WAVEFORM (SQUARE WAVE COMES OUT?) TROUBLE IN IC902 - 17 -...
  • Page 18 2. NO CHARACTER NO CHARACTER CHECK TROUBLE IN IC301 PIN 30 (12V), P301, PIN 2 (5V)? 5V, 12V LINE TROUBLE IN CHECK PC SIGNAL, IC301 PIN 1, 3, 6 ? SIGNAL CABLE, IC2231 CHECK TROUBLE IN IC301 PIN 25, 27, 29 ? IC301 CHECK TROUBLE IN...
  • Page 19 3. NO RASTER NO VIDEO (POWER INDICATOR GREEN or ORANGE) CHECK TROUBLE IN ORANGE POWER INDICATOR D-SUB & 5-BNC GREEN or ORANGE ? SIGNAL CABLE GREEN MIN. ROTATE SCREEN CHECK (Counter-clockwise) CONTROL KNOB TO SCREEN CONTROL CLOCKWISE KNOB OF FBT CHECK VOLTAGE AT D960 CATHODE (90V)
  • Page 20 4. NO VERTICAL DEFLECTION NO V-DEFLECTION (ONE HORIZONTAL LINE) CHECK TROUBLE IN IC601 PIN 2 (15V) ? T901 PIN 18 CHECK TROUBLE IN IC601 PIN 4 T901 PIN 17 (-12V)? CHECK TROUBLE IN IC201 PIN 12 IC201 (SAWTOOTH WAVE)? TROUBLE IN IC601, VERTICAL OUTPUT CIRCUIT - 20 -...
  • Page 21 5. TROUBLE IN DPM STAND-BY/SUSPEND/ OFF MODE FAILURE CHECK CHECK PC, IC271 (MICOM) NO H / V SYNC SIGNAL (PC IS NOT GOING INTO PIN 42, 1 (H/V INPUT) DPM MODE) SIGNAL? INPUT H/V SYNC CHECK TROUBLE IN IC271 PIN 6, 7 X201, IC271 WAVEFORM? CHECK...

  • Page 22: No Degaussing

    6. NO DEGAUSSING BUTTON MUST BE PRESSED.) NO DEGAUSSING CHECK TROUBLE IN IC271 PIN 17 IC271 (MICOM) (5V)? CHECK TROUBLE IN Q902 COLLECTOR Q271 VOLTAGE (0.5V)? CHECK TROUBLE IN P901? P901 CHECK TROUBLE IN RL901? RL901 TROUBLE IN TH901, DEGAUSSING COIL - 22 -...
  • Page 23 7. NO TILT (ROTATION ) NO TILT (ROTATION) CHECK TROUBLE IN IC651 PIN 8 VOLTAGE D958 (15V) ? CHECK TROUBLE IN IC651 PIN 4 D959 (-15V) ? TROUBLE IN CHECK IC271 (MICOM), IC691 IC651 PIN 3 ? IC651 TROUBLE IN P661, TILT COIL CONNECTOR, TILT COIL - 23 -...
  • Page 24 8. TROUBLE IN OSD NO OSD CHECK TROUBLE IN IC302 PIN 4, 13 P303, D909 (5V) ? CHECK IC302 PIN 5 TROUBLE IN (NEGATIVE H-PULSE Q301, P303 COMES IN ?) CHECK IC302 PIN 14 TROUBLE IN (NEGATIVE V-PULSE Q384, P303 COMES IN?) CHECK IC302 PIN 17, 18, 19...
  • Page 25 - 25 -...

  • Page 26: Exploded View

    COIL,DEGAUSSING, LX31GETPURITY,0.22*130TS,1600MM,NB230A 6140TC2013B COIL,DEGAUSSING, LX31 GET PURITY,61.5 OHM,760MM,NB230A 6140TC2016A COIL,DEGAUSSING, LX31 GET 0.65*60TS,NB230A 6174T11003B FBT (FLY BACK TRANSFORMER), 1054A,NB230A LG-PHILIPS 21" 6200TJB004A FILTER(CIRC), EMI, 03ME3G(3) DELTA FB915B 3550TKK180B COVER, NB230A BACK ABS 8C358 6871TST259A PWB(PCB) ASSEMBLY, SUB, NB230A LED & P/SW TOTAL BRAND CA-94...

  • Page 27: 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. 03. 25 DATE: 2002. 03. 25. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC.
  • Page 28 DATE: 2002. 03. 25. DATE: 2002. 03. 25. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C704 0CK2220W515 2200P 500V K B C976 0CK1010K515 100PF 50V K B TR C705 0CZZTFB002A MEPP KE/SH/SW 3KV 2200PF 5% C977...
  • Page 29 DATE: 2002. 03. 25. DATE: 2002. 03. 25. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION DZ521 0DZ300009BB MTZJ30B TP ROHM-K DO34 0.5W Q408 0TR114009AB DTC114ES TP ROHM-K SPT NPN DZ522 0DZ180009AG MTZJ18B TP ROHM-K DO34 500M...
  • Page 30 DATE: 2002. 03. 25. DATE: 2002. 03. 25. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R419 0RN8202F409 82K 1/6W 1% TA52 R612 0RD4302Q609 43K 1/4W(3 5% TA52 R420 0RN1003F409 100K 1/6W 1 TA52 R613 0RN3302F409...
  • Page 31 MKT 100V 474JTR PHS 26474 SG501 165-004A AG20PT 152F-L3N/S-23 HANDOK C372 0CH6330K416 33PF 50V J NP0 2012 R/TP T501 6174T11003B “1042C,NB230A LG-PHILIPS 21””” C374 181-288B MKT 100V 104JTR PHS26104 T701 6170TCZ008B EI2218 1.13MH NB230A C375 181-288E MKT 100V 474JTR PHS 26474...
  • Page 32 DATE: 2002. 03. 25. DATE: 2002. 03. 25. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C395 0CH3104K566 0.1UF 50V K X 2012 R/TP Q324 0TR320509AB KTC3205-Y(KTC2236A) TP KEC T C397 0CH3104K566 0.1UF 50V K X 2012 R/TP...
  • Page 33 DATE: 2002. 03. 25. DATE: 2002. 03. 25. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R374 6210TCE001R HB-1S2012-400JT CERATECH 201 C274 0CE4764H638 47U SRA 25V M FM5 TP(5) R375 6210TCE001R HB-1S2012-400JT CERATECH 201 C275...
  • Page 34 DATE: 2002. 03. 25. DATE: 2002. 03. 25. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION DZ2236 0DZ560009DA UDZ S 5.6B TP ROHM-K SOD323 R221 0RH1000D622 100 1/10W 5 D.R/TP DZ2237 0DZ560009DA UDZ S 5.6B TP ROHM-K SOD323...
  • Page 35 DATE: 2002. 03. 25. DATE: 2002. 03. 25. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R289 0RH4702D622 47K 1/10W 5 D.R/TP C907 0CC4710K405 470P 50V J SL TP R290 0RH4702D622 47K 1/10W 5 D.R/TP C908...
  • Page 36 DATE: 2002. 03. 25. DATE: 2002. 03. 25. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R101 0RD1001Q609 1K 1/4W(3 5% TA52 SW137 140-058D SKHV10911A LGEC NON 12 20 HO R102 0RN6200F409 620 1/6W 1% TA52...
  • Page 37 DATE: 2002. 03. 25. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R523 0RH1502D622 15K 1/10W 5 D.R/TP R525 0RH1501D622 1.5K OHM 1 / 10 W 2012 5.00% R527 0RH1502D622 15K 1/10W 5 D.R/TP R528 0RH0222D622 22 1/10W 5 D.R/TP R529 0RH1002D622 10K OHM 1 / 10 W 2012 5.00%...

  • Page 38: Pin Configuration

    PIN CONFIGURATION TDA4856 SDIP32 H/V SYNC HFLB FOCUS XRAY HSMOD HPLL2 BSENS HCAP HREF BDRV HBUF PGND HPLL1 SGND HDRY TDA4856 VCAP XSEL VREF EWDRV VAGC VOUT2 VSMOD VOUT1 ASCOR VSYNC HSYNC CLBL HUNLOCK Pin Configuration Block Diagram EHT compensation via vertical size EHT compensation 1.2V...
  • Page 39 TDA8177 HEPTAWATT BK VER NON-INVERTING INPUT OUTPUT STAGE SUPPLY OUTPUT GROUND FLYBACK GENERATOR SUPPLY VOLTAGE INVERTING INPUT HEPTAWATT Tab connected to Pin 4 (Plastic Package) ORDER CODE : TDA8177 Pin Conection Block Diagram OUTPUT SUPPLY STAGE FLYBACK VOLTAGE SUPPLY GENERATOR FLYBACK GENERATOR INVERTING INPUT...

  • Page 40: Schematic Diagram

    SCHEMATIC DIAGRAM IIC-SDA IIC-SCL DDC-SDA DDC-SCL WF10 WF12 WF11 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. - 40 - - 41 -...
  • Page 41 SCHEMATIC DIAGRAM IIC-SDA IIC-SCL DDC-SDA 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. - 42 - - 43 -...

  • Page 42: Printed Circuit Board

    PRINTED CIRCUIT BOARD 1. MAIN BOARD (Component Side) 2. MAIN BOARD(Solder Side) 3. VIDEO BOARD (Component Side) 4. VIDEO BOARD (Solder Side) - 44 - - 45 -...
  • Page 43 PRINTED CIRCUIT BOARD 5. POWER & CONTROL BOARD (Component Side) 6. POWER & CONTROL BOARD (Solder Side) 7. INTERFACE BOARD (Component Side) 8. INTERFACE BOARD (Solder Side) 9. USB BOARD (Component Side) 10. USB BOARD (Solder Side) 11. SWITCH BOARD (Component Side) 12.
  • Page 44 Apr. 2002 P/NO : 3828TSL084A Printed in Korea...

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