LG CS990D-EP Service Manual Download Page 46

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Summary of Contents for CS990D-EP

Page 1: ...COLOR MONITOR SERVICE MANUAL CAUTION BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL MODEL CS990D EP CHASSIS NO CA 84 ID LABEL Model No FACTORY MODEL CS990D ...

Page 2: ...x 274 3mm 13 78 x 10 31 4 2 Display Color Full Colors 4 3 Display Resolution 1600 x 1200 75Hz Non Interlace 4 4 Video Bandwidth 203 MHz 5 ENVIRONMENT 5 1 Operating Temperature 0 C 40 C Ambient 5 2 Relative Humidity 8 80 Non condensing 5 3 Altitude 5 000m 6 DIMENSIONS with TILT SWIVEL Width 458 0 mm 18 03 inch Depth 479 0 mm 18 86 inch Height 468 0 mm 18 43 inch 7 WEIGHT with TILT SWIVEL Net Weight...

Page 3: ... Soldering must be inspected for the cold solder joints frayed leads damaged insulation solder splashes or the sharp points Be sure to remove all foreign materials IMPLOSION PROTECTION All used display tubes are equipped with an integral implosion protection system but care should be taken to avoid damage and scratching during installation Use only same type display tubes X RADIATION The only pote...

Page 4: ... 015 0 044 0 523 1024 X 768 85Hz Yes MODE 4 91 146 10 971 8 127 2 844 0 406 1 016 1 422 85 024 11 762 11 235 0 527 0 011 0 033 0 483 1280 X 1024 85Hz Yes MODE 5 93 750 10 666 7 901 2 765 0 316 0 948 1 501 75 000 13 333 12 800 0 533 0 011 0 032 0 490 1600 X 1200 75Hz Yes MARK A B C D E F A B C D E F VESA MODE FACTORY PRESET MODE Resolution Recall H O R I Z O N T A L V E R T I C A L Sync Polarity Fr...

Page 5: ...monitor ON and OFF 2 Power Indicator This Indicator lights up green when the monitor operates normally If the monitor is in DPM Energy Saving mode stand by suspend off this indicator color changes to amber 3 Button Use this button to enter or exit the on screen display 4 Contrast Control To adjust the display to the contrast desired 5 Brightness Control To adjust the brightness of the screen 6 OSD...

Page 6: ...To acces a control use the or Buttons When the icon you want becomes highlighted press the Button 3 Use the Buttons to adjust the item to the desired level 4 Accept the changes by pressing the Button 5 Exit the OSD by Pressing the Button Listed below are icons icon names and icon descriptions of the OSD menu H POSITION To move picture image left and right H SIZE To adjust image width 4 3 2 k H z 8...

Page 7: ...NVERGENCE This item allows you to adjust the horizontal convergence The horizontal convergence control adjust the alignment of the red and blue horizontal fields 4 3 2 k H z 8 5 H z V M O I R E 0 U 4 3 2 k H z 8 5 H z H C O N V E R G E N C E 5 0 U COLOR 9300 To appear the display s color temperature Slightly bluish white 6500 To appear the display s color temperature Slightly reddish white Tempera...

Page 8: ...guage in which the control names are displayed OSD Menus are available in 8 languages English German French Spanish Italian Svenska Suomi and Português VIDEO LEVEL This item is used to select the monitor s input signal level The normal level used for most PC s is 0 7V When the screen suddenly gets brightened or blurry please select 1 0V and try again DEGAUSS To manually demagnetize the screen whic...

Page 9: ... Ref No SW201 VR202 VR201 SW205 SW204 Ref No SW202 SW203 VR901 VR701 Control Function POWER BUTTON CONTRAST ADJUSTMENT BRIGHTNESS ADJUSTMENT OSD SELECT ADJUSTMENT RIGHT OSD SELECT ADJUSTMENT LEFT Control Function OSD BUTTON OSD EXIT BUTTON B ADJUSTMENT HIGH VOLTAGE ADJUSTMENT ...

Page 10: ...WIRING DIAGRAM 10 P701 P901 WG1 P303 P308 P302 P301 P305 P304 P402 P201 P902 P801 P702 P401 Degaussing Coil CDT Earth DY Pin DY Assembly Screw Anode Cap P702 1 P202 P203 ...

Page 11: ...L 1 Remove two screw caps a 2 Remove four screws b 3 Slide the Back Cover away from the Front Cabinet of the monitor a b 1 TILT SWIVEL REMOVAL 1 Set the monitor face downward 2 Remove two screws a 3 Pressing the latch b carefully remove the Tilt Swivel by pulling it upward a a a a a a a a ...

Page 12: ... P304 from the Video PCB 3 Disconnect Pin c from the DY Assembly screw 4 Carefully separate the CDT Board Assembly from the CDT neck 5 Discharge the remaining static electricity by shorting between the Anode Cap and the CDT ground 6 Disconnect the Anode Cap from the CDT 7 Remove four screws a 8 Remove two screws b 9 Remove the Front Cabinet and the CDT set from the Main Total Assembly 10 Disconnec...

Page 13: ...REMOVAL 1 Remove three screws a 2 Remove the Control PCB Assembly from the Front Cabinet a 6 BOTTOM BRACKET REMOVAL 1 Remove two screws a 2 Remove two screws b 3 Remove screw c and Metal Fix 4 Remove the Bottom Bracket a a c b b ...

Page 14: ...2 C DATA SDA I 2 C CLOCK SCL VIDEO PRE AMP IC302 Signal Cable R G B VIDEO MAIN AMP IC303 12V 5V CUT OFF CONTROL 125V 80V 5V H V Sync Processor IC701 TDA4856 V OUT IC601 TDA8172 H OUT Q708 H Linearity Correction DC DC Converter X RAY Protection Circuit FBT T701 Dynamic Focus Circuit Auto Beam Limit Vertical Blanking Brightness Control 120V 30V 700V H V CONTROL DUMMY TRANS 12V 25V MICOM IC401 SCL SD...

Page 15: ...d Q907 becomes stand by and suspend mode It s power consumption is below 8W When no horizontal and vertical sync signal input it s power consumption is below 3W 5 X ray Protection This circuit detects the rectified DC voltage comes from the FBT pin 4 If the high voltage of the FBT reaches up to about 30kV abnormal state Micom IC401 detects It stops B voltage supplied to the FBT T701 and high volta...

Page 16: ...king and Brightness Control This circuit eliminates the retrace line by supplying a negative pulse to the G1 of the CDT The brightness control circuit is used to control of the screen brightness by changing the DC level of G1 19 Image Rotation Tilt Circuit This circuit corrects the tilt of the screen by supplying the image rotation signal to the tilt coil which is attached to the CDT near the defl...

Page 17: ...N as arrow keys to center of the screen 7 Adjust H SIZE as arrow keys to 350 2mm 8 Adjust V POSITION as arrow keys to center of the screen 9 Adjust V SIZE as arrow keys to 262 2mm 10 Adjust SIDE PIN Side Pincushion as arrow keys to be the best condition 11 Adjust TRAPEZOID as arrow keys to be the best condition 12 Adjust TILT as arrow keys to be the best condition 13 Display cross hatch pattern at...

Page 18: ... C 15 10 5 5 6 9 1 1 1 14 13 25 6 5V 5V 5V 4 7K 4 7K 4 7K 74LS06 74LS06 OFF ON OFF ON 11 16 Adjust SUB CONTRAST command to 47 1FL of the color 15 0 window pattern 70x70mm luminance at Mode 4 17 Display color 15 0 full white patten at Mode 4 18 Set the Brightness and Contrast to max 19 COLOR ADJ LUMINANCE ABL command 20 Adjust ABL to 32 1FL of the luminance 21 Exit from the program 6 Adjustment for...

Page 19: ...UBLESHOOTING GUIDE 1 NO POWER NO POWER POWER INDICATOR OFF TROUBLE IN IC901 TROUBLE IN FUSE F901 TROUBLE IN D902 D903 D904 CHECK FUSE OK CHECK C907 VOLTAGE 310VDC NO YES YES NO NO CHECK D902 D903 D904 VOLTAGE ...

Page 20: ...V PIN 17 5V CHECK IC302 PIN 2 6 11 CHECK IC302 PIN 29 32 35 TROUBLE IN P302 5V 12V LINE TROUBLE IN PC SIGNAL SIGNAL CABLE TROUBLE IN IC302 TROUBLE IN CDT SOCKET NO YES NO NO YES YES CHECK R G B CATHODE VOLTAGE TROUBLE IN IC303 NO YES NO CHARACTER ...

Page 21: ...AGE AT D912 CATHODE 190V D909 CATHODE 80V IC904 OUT 12V D906 CATHODE 6 3V CHECK IC401 MICOM PIN 5 5V HIGH IC701 PIN 10 12V HIGH ROTATE SCREEN CONTROL KNOB TO CLOCKWISE TROUBLE IN IC401 MICOM IC701 TROUBLE IN CDT SOCKET BOARD TROUBLE IN PRIMARY CIRCUIT OF T901 TROUBLE IN P402 SIGNAL CABLE ORANGE MIN Counter clockwise GREEN OK YES NO YES NO ...

Page 22: ...ION NO V DEFLECTION ONE HORIZONTAL LINE CHECK IC601 Pin 2 15V CHECK IC601 PIN 4 12V TROUBLE IN T901 PIN 15 TROUBLE IN T901 PIN 17 TROUBLE IN IC601 V CIRCUIT NO NO YES YES CHECK IC701 PIN 12 SAWTOOTH WAVE TROUBLE IN IC701 NO YES ...

Page 23: ...M MODE TROUBLE IN X401 IC401 TROUBLE IN IC401 TROUBLE IN IC401 TROUBLE IN T901 or PC NO H V SYNC SIGNAL INPUT H V SYNC NO NO NO DPMS TABLE Mode Item NORMAL STAND BY SUSPEND OFF H V SYNC ON ON OFF ON ON OFF OFF OFF LED GREEN ORANGE ORANGE ORANGE VIDEO NORMAL OFF 0V OFF 0V OFF 0V YES YES CHECK B LINE 12V 15V 80V 5V TROUBLE IN Q930 Q907 NO YES STAND BY SUSPEND OFF MODE FAILURE ...

Page 24: ...IN 14 5V CHECK Q908 COLLECTOR VOLTAGE 0 5V CHECK P901 CHECK RL901 TROUBLE IN IC401 MICOM TROUBLE IN D914 TROUBLE IN P901 TROUBLE IN RL901 TROUBLE IN TH901 DEGAUSSING COIL NO DEGAUSSING BUTTON MUST BE PRESSED NO NO NO NO YES YES YES YES ...

Page 25: ... 7 NO TILT ROTATION TROUBLE IN P303 TILT COIL CONNECTOR TILT COIL NO TILT ROTATION TROUBLE IN D913 TROUBLE IN Q315 CHECK C335 VOLTAGE 12V NO YES YES CHECK Q315 NO TROUBLE IN IC301 OSD IC YES CHECK IC301 NO ...

Page 26: ... CHECK IC301 PIN 18 NEGATIVE V PULSE COMES IN CHECK IC301 PIN 13 14 15 IS THERE ANY SIGNAL WHEN OPERATING FRONT CONTROL NO OSD TROUBLE IN IC302 TROUBLE IN P302 TROUBLE IN P302 TROUBLE IN IC301 IC401 YES YES YES NO NO NO CHECK IC301 PIN 4 17 5V TROUBLE IN P302 NO YES ...

Page 27: ...EXPLODED VIEW 27 C A B 6 8 10 10 10 10 11 15 14 14 16 9 1 5 1 9 7 12 17 2 3 4 5 13 1 8 1 ...

Page 28: ...FZMY GW18 NEW TYPE METAL ASS Y FRAME CG991C COIL DEGAUSSING FRAME SIDE CG991 FBT FLY BACK TRANSFORMER Y268069 HFL1127RD HITACHI 19 FILTER CIRC EMI BNS 02AA2LR 3 BAE EUN CB995C SHIELD REAR BRACKET CS991C SIGNAL CABLE UL 2990 9C AT 550MM COOL GRAY 3C CG991C FEMALE DM METAL ASS Y SHIELD CS991D CS990D BRACKET CB995D MAIN BRAND SCREW PTP 4 8 MSWR FZMY METAL ASS Y SHIELD CS991C PWB PCB ASS Y SUB CS990D ...

Page 29: ...ITOR POLYESTER MKT 100V 474JTR PHS 26474 C327 0CE2266N618 CAPACITOR AL ELECTROLYTIC 22M SMS 100V M FM5 TP5 C328 181 288E CAPACITOR POLYESTER MKT 100V 474JTR PHS 26474 C329 181 288E CAPACITOR POLYESTER MKT 100V 474JTR PHS 26474 C330 181 288E CAPACITOR POLYESTER MKT 100V 474JTR PHS 26474 C331 0CE226CP630 CAPACITOR AL ELECTROLYTIC 22U SHL 160V M FM5 C332 0CK3320W515 CAPACITOR CERAMIC HIGH DIELECTRIC ...

Page 30: ... TR C406 0CC1200K415 CAPACITOR FIXED CERAMIC Temp compensate 12PF D 50V 5 NP0 TR C407 0CC1200K415 CAPACITOR FIXED CERAMIC Temp compensate 12PF D 50V 5 NP0 TR C409 0CN2710K519 CAPACITOR TUBULAR HIGH DIELEC 270P 50V K B TA52 C411 0CN2210K519 CAPACITOR TUBULAR HIGH DIELEC 220P 50V K B TA52 C412 0CN2710K519 CAPACITOR TUBULAR HIGH DIELEC 270P 50V K B TA52 C413 0CN1040K949 CAPACITOR TUBULAR HIGH DIELEC ...

Page 31: ...V M FM5 BULK C755 0CE105CK638 CAPACITOR AL ELECTROLYTIC 1UF SHL SD 50V M FM5 TP 5 C756 0CN1040K949 CAPACITOR TUBULAR HIGH DIELEC 0 1M 50V Z F TA52 C757 0CE2266K618 CAPACITOR AL ELECTROLYTIC 22M SMS 50V M FM5 TP 5 C758 0CK10302945 CAPACITOR CERAMIC HIGH DIELECTRIC 0 01UF 2KV Z F TR C761 0CE4766K618 CAPACITOR AL ELECTROLYTIC 47M SMS 50V M FM5 TP 5 C762 0CE1066F618 CAPACITOR AL ELECTROLYTIC 10UF SMS ...

Page 32: ...6A 4 0NSEC D307 0DS124409AA DIODE SWITCHING 1SS244 TP ROHM KOREA D308 0DS124409AA DIODE SWITCHING 1SS244 TP ROHM KOREA D309 0DS124409AA DIODE SWITCHING 1SS244 TP ROHM KOREA D310 0DS124409AA DIODE SWITCHING 1SS244 TP ROHM KOREA D311 0DS124409AA DIODE SWITCHING 1SS244 TP ROHM KOREA D312 0DS124409AA DIODE SWITCHING 1SS244 TP ROHM KOREA D313 0DS124409AA DIODE SWITCHING 1SS244 TP ROHM KOREA D314 0DS124...

Page 33: ...A 30A 50NS 50UA D907 0DR200009AC DIODE RECTIFIER UG2D TP G I DO 204AC 200V 2A 80A 25NSEC 5UA D908 0DD400509BB DIODE RECTIFIER UF4005 52MM TP G I DO41 600V 1A 30A 75NS 10UA D909 0DD200009AH DIODE RECTIFIER RU2AMV 1 TP SANKEN R TMD 600V 1 1A 20A 4US 10U D910 0DR260400AA DIODE RECTIFIER S2L60 4004P15 BK SHINDENGEN NON 600V 1 5A 50A D911 0DR260400AA DIODE RECTIFIER S2L60 4004P15 BK SHINDENGEN NON 600V...

Page 34: ...50A0FG SAMWHA 2 5 5 0MM AXIAL52MM FB322 6210TCE001L CORE CIRC BEAD HB 1T2012 102JT CERATECH 2012MM R TP FB323 6210TCE001L CORE CIRC BEAD HB 1T2012 102JT CERATECH 2012MM R TP FB324 6210TCE001L CORE CIRC BEAD HB 1T2012 102JT CERATECH 2012MM R TP FB325 6210TCE001L CORE CIRC BEAD HB 1T2012 102JT CERATECH 2012MM R TP FB326 125 155F CORE CIRC BEAD BFD3580R2FG SAMWHA 3 5 8 0MM RADIAL FB401 125 155J CORE ...

Page 35: ...TRANSISTOR 2N3906 TP SAMSUNG TO92 NPN Q750 0TF283509AA FET 2SK2835 TP TP TOSHIBA 200V 5A NON Q751 0TR102009AB TRANSISTOR KRC102M TP KRC1202 KEC Q752 0TR102009AB TRANSISTOR KRC102M TP KRC1202 KEC Q753 0TR102009AB TRANSISTOR KRC102M TP KRC1202 KEC Q754 0TR102009AB TRANSISTOR KRC102M TP KRC1202 KEC Q760 0TR319809AA TRANSISTOR KTC3198 Y KTC1815 TP KEC TO92 NPN Q761 0TR319809AA TRANSISTOR KTC3198 Y KTC...

Page 36: ...OR METAL GLAZED CHIP 24K OHM 1 10 W 2012 5 00 D R348 0RD2402Q609 RESISTOR FIXED CARBON FILM 24K 1 4W 3 5 TA52 R349 0RD2402Q609 RESISTOR FIXED CARBON FILM 24K 1 4W 3 5 TA52 R350 0RD1000Q609 RESISTOR FIXED CARBON FILM 100 1 4W 3 5 TA52 R351 0RD1000Q609 RESISTOR FIXED CARBON FILM 100 1 4W 3 5 TA52 R352 0RD1000Q609 RESISTOR FIXED CARBON FILM 100 1 4W 3 5 TA52 R354 0RD0471A609 RESISTOR FIXED CARBON FIL...

Page 37: ...FIXED CARBON FILM 47 1 4W 3 5 TA52 R437 0RD1000Q609 RESISTOR FIXED CARBON FILM 100 1 4W 3 5 TA52 R438 0RD1000Q609 RESISTOR FIXED CARBON FILM 100 1 4W 3 5 TA52 R439 0RD1000Q609 RESISTOR FIXED CARBON FILM 100 1 4W 3 5 TA52 R440 0RD1000Q609 RESISTOR FIXED CARBON FILM 100 1 4W 3 5 TA52 R443 0RD0102Q609 RESISTOR FIXED CARBON FILM 10 1 4W 3 5 TA52 R444 0RD4701Q609 RESISTOR FIXED CARBON FILM 4 70K 1 4W 3...

Page 38: ... RESISTOR FIXED CARBON FILM 5 60K 1 4W 3 5 TA52 R764 0RX0221K607 RESISTOR SMALL FIX METAL FILM OXIDE 2 2 OHM 2 W 5 TA62 R765 0RX0221K607 RESISTOR SMALL FIX METAL FILM OXIDE 2 2 OHM 2 W 5 TA62 R766 0RD0332A609 RESISTOR FIXED CARBON FILM 33 OHM 1 2 W 7 0 5 TA52 R767 0RD3000A609 RESISTOR FIXED CARBON FILM 300 OHM 1 2 W 7 0 5 TA52 R768 0RX0472K607 RESISTOR SMALL FIX METAL FILM OXIDE 47 OHM 2 W 5 TA62 ...

Page 39: ...BON FILM 1K 1 4W 3 5 TA52 R915 0RN1801F409 RESISTOR FIXED METAL FILM 1 80K 1 6W 1 TA52 R916 0RD3901A609 RESISTOR FIXED CARBON FILM 3 9K OHM 1 2 W 7 0 5 TA52 R917 0RD1002Q609 RESISTOR FIXED CARBON FILM 10K 1 4W 3 5 TA52 R918 0RD2402A609 RESISTOR FIXED CARBON FILM 24K OHM 1 2 W 7 0 5 TA52 R919 0RD1004Q609 RESISTOR FIXED CARBON FILM 1M OHM 1 4 W 3 4 5 TA52 R920 0RD1003Q609 RESISTOR FIXED CARBON FILM ...

Page 40: ...FORMER Y268069 HFL1127RD HITACHI 19 T702 151 515A TRANSFORMER HORIZONTAL DRIVER EI 2519 4 5MH CF201 T703 6140TDZ004B COIL DUMMY EER2834 1 5MH CB995C T901 6170TMZ102A TRANSFORMER SMPS EER4445S 180 UH V 18PIN CB995D CS SI T902 151 414E TRANSFORMER PULSE UU1116 8 8MH PLUSE T904 6140TBZ032A COIL CHOKE EE42SI PFC 49MH 42MM 230 10T 44MH MIN TH901 6322TB070AA THERMISTOR PTC J503P63D070M290S JA HWA 20 220...

Page 41: ...utput 1 Descending Sawtooth Vertical Synchronization Input Horizontal Composite Synchronization Input Video Clamping Pulse V Blanking Output PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 SYMBOL HUNLOCK SCL SDA ASCOR VSMOD VAGC VREF VCAP SGND HPLL1 HBUF HREF HCAP HPLL 2 HSMOD FOCUS DESCRIPTION H Synchronization Unlock Protection V Blanking Output I2C Bus Clock Input I2C Bus Data Input Output for Asymm...

Page 42: ...IN INPUT R Vcc1 R Vcc1 G Vcc2 OUTPUT R EXT FEED BACK R EXT FEED BACK G EXT FEED BACK B RETRACE BLK IN D A OUT 1 D A OUT 2 D A OUT 3 D A OUT 4 GND 5V SDA SCL CLAMP PULSE IN MAIN BRIGHTNESS GND2 OUTPUT G OUTPUT B Vcc1 B Vcc 5V OSD IN R OSD IN G OSD IN B GND 1 R GND 1 G GND 1 B INPUT G INPUT B INPUT SOG ABL IN NC SOG SEP OUT Outline 36P4E PIN CONFIGURATION TOP VIEW NC NO CONNECTION ...

Page 43: ... 43 KA358 Dual Operational Amplifier KA431 A BLOCK DIAGRAM AT24C08 8D EEPROM AT24C08 1 2 3 4 8 7 6 5 Vcc Wp SCL SDA A0 A1 A2 GND Pin Configuration 1 8 1 8 ...

Page 44: ...THERMAL PROTECTION CURRENT GENERATOR REFERENCE VOLTAGE STARTING CIRCUIT ERROR AMPLIFIER 1 Input 2 GND 3 Output 1 2 3 BLOCK DIAGRAM TDA8172 Vertical Deflection Output Circuit 1 7 7 6 5 4 3 2 1 NON INVERTING INPUT OUTPUT STAGE SUPPLY OUYPUT GROUND FLYBACK GENERATOR SUPPLY VOLTAGE INVERTING INPUT Pin Configuration ...

Page 45: ... 45 PARTS TYPE PARTS TYPE KSA1013 KSB564AC E B C E C B KTA1275 KTC3206 KTC3207 KTA1270 KTC3198 KTC3202 KTC200 Y E B C E B C 2N3904 E C B IRFS640A IRFS630A G D S 2SC4633 C4633 B E C ...

Page 46: ... 46 47 ...

Page 47: ...3 VIDEO BOARD Component Side 4 VIDEO BOARD Solder Side 1 MAIN BOARD Component Side 2 MAIN BOARD Solder Side 5 CONTROL BOARD Component Side 6 CONTROL BOARD Solder Side PRINTED CIRCUIT BOARD ...

Page 48: ...PACKING AND ACCESSORIES 50 Signal Cable Owner s Manual Power Cord Top Packing Bottom Packing Front Side R ight S ide ...

Page 49: ...Jan 2001 P NO 3828TSL038M Printed in Korea ...

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