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Dell E773c Series Service Manual

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SERVICE MANUAL

COLOR MONITOR

DELL E773c Series
THESE DOCUMENTS ARE FOR REPAIR SERVICE INFORMATION ONLY.
EVERY REASONABLE EFFORT HAS BEEN MADE TO ENSURE THE ACCURACY OF
THIS MANUAL; WE CANNOT GUARANTEE THE ACCURACY OF THIS INFORMATION
AFTER THE DATE OF PUBLICATION AND DISCLAIMS LIABILITY FOR CHANGES,
ERRORS OR OMISSIONS.
MANUFACTURE DATE : MAY.2005
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  • Page 1: Service Manual

    SERVICE MANUAL COLOR MONITOR DELL E773c Series THESE DOCUMENTS ARE FOR REPAIR SERVICE INFORMATION ONLY. EVERY REASONABLE EFFORT HAS BEEN MADE TO ENSURE THE ACCURACY OF THIS MANUAL; WE CANNOT GUARANTEE THE ACCURACY OF THIS INFORMATION AFTER THE DATE OF PUBLICATION AND DISCLAIMS LIABILITY FOR CHANGES, ERRORS OR OMISSIONS.
  • Page 2: Table Of Contents

    TABLE OF CONTENTS 1. SPECIFICATIONS ..................2. PRECAUTION AND NOTICES ..............SAFETY PRECAUTIONS ..............PRODUCT SAFETY NOTICE ............. SERVICE NOTES ................HIGH VOLTAGE WARNING ............... 3. OPERATING INSTRUCTIONS ..............4. ADJUSTMENT ....................ADJUSTMENT CONDITIONS AND PRECAUTIONS ......MAIN ADJUSTMENTS ................ ADJUSTMENT METHOD ..............
  • Page 3: Specifications

    1. SPECIFICATIONS FOR HP7550 SERIES COLOR MONITOR CRT : 43.2CM(17") 90 Deflection, 29mm Neck, 0.27mm Dot Pitch, Non-Glare Screen Viewable image Size: 40.6CM (16") diagonal Display Color: Unlimited Colors External Controls: Power On/Off, Power led, Function knob: Contrast, Brightness, H-Center, H-Size, V-Center, V-Size, Rotation, Pincushion, Trapezoid, Pin-Balance, Parallelogram, Color Temperature, Degaussing, Recall, Moire, Input Video Signal...
  • Page 4 14. Main dimensions / weight: Packed Monitor Monitor Width: 410mm 515mm Height: 402mm 464mm Depth: 420mm 570mm Weight: 15.5kg 17.5kg 15. Press the “MENU”funtion and don’t release it,then press power swith on,the monitor will enter the burn-in mode if it is no signal input. 16.
  • Page 5: Precautions And Notices

    2. PRECAUTIONS AND NOTICES SAFETY PRECAUTIONS Observe all caution and safety related notes located inside the display cabinet. Operation of the display with the cover removed, may cause a serious shock hazard from the display power supply. Work on the display should not be attempted by anyone who is not thoroughly familiar with precautions necessary when working on high voltage equipment.
  • Page 6: Product Safety Notice

    PRODUCT SAFETY NOTICE Many electrical and mechanical parts in this chassis have special safety visual inspections and the protection afforded by them cannot necessarily be obtained by using replacement components rated for higher voltage, wattage, etc. Before replacing any of these components read the parts list in this manual carefully.
  • Page 7: Operating Instructions

    3. OPERATING INSTRUCTIONS This procedure gives you instructions for installing and using the Color display. Position the display on the desired operation and plug the power cord into a convenient AC outlet. Three-wire power cord must be shielded and is provided as a safety precaution as it connects the chassis and cabinet to the electrical conduit ground.
  • Page 8: Adjustment

    4. ADJUSTMENT ADJUSTMENT CONDITIONS AND PRECAUTIONS Approximately 30 minutes should be allowed for warm up before proceeding. Adjustments should be undertaken only on those necessary elements since most of them have been carefully preset at the factory. 4-2 MAIN ADJUSTMENTS FUNCTION LOCATION DESIGNATION...
  • Page 9 H-SIZE V-MOIRE REDUCE H-CENTER H-MOIRE REDUCE V-SIZE MOIRE DISABLE V-CENTER H-REGULATION PINCUSHION V-REGULATION PARALLELOGRAM H-LINEAR PIN-BALANCE V-LINEARITY TRAPEZOID V-LINEARITY ROTATION TOP CORNER NO USE BOT CORNER NO USE CONTRAST MAX-HSIZE MODIFY BRIGHTNESS MAX-VSIZE MODIFY R-BIAS MAX-TRAPEZOID MODIFY G-BIAS BURN IN R-BIAS DEGAUSS R-GAIN...
  • Page 10: Specifications

    3. White Balance adjustment: A. Choose key of OSD and press it for above 10s,then enter into factory setting area for modulation. B. Brightness & contrast ratio MAX, fix to G-BIAS,fix to 40. C. Raster Max modulation: Raster Pattern, adjust R or B bias and G2, make x=271±10, y=301±10, Y=1.50±0.2 cd/m D.
  • Page 11: Edid Contents

    RELATIVE PLACEMENT OF TYPICAL COMPONENTS Purity Magnets 6-pole Convergence Magnets 4-pole Convergence Magnets Deflection Yoke 6. Convergence adjustment A. Produce a magenta crosshatch on the display. B. Adjust the focus for the best overall focus on the display. Also adjust the brightness to the desired condition. C.
  • Page 12: Circuit Description

    5. CIRCUIT DESCRIPTION 5-1 MICRO CONTROLLER CIRCUIT MICRO Controller The IC101 contains a 6502/8051 8-bit CPU core, 512 bytes of RAM, 16K bytes of ROM,14 channel 8 bit PWM D/A converters, 2 channel A/D converters for key detection, one 8 bit pre-loadable base timer, internal H-sync and V-sync signals processor providing mode detection, watch- dog timer preventing system from abnormal operation, and an I²C bus interface.
  • Page 13: Transistor & Diode Circuit

    5-3 TRANSISTOR & DIODE CIRCUIT LOCATION CIRCUIT FUNCTION DESCRIPTION D901~D904 Bridge Rectifier for AC Source D910 Clamp Diode for snub CKT D919 Rectifier for Output Voltage D922 Rectifier for Output Voltage D923 Rectifier for Output Voltage D925 Rectifier for B+ Supply D929 B+ Feed Back Rectifier from F.B.T Pulse IC901...
  • Page 14: Trouble Shooting Chart

    6.TROUBLE SHOOTING CHART 6-1 NO RASTER, CRT RELATIVE CIRCUIT PROBLEMS CHECK MAIN PCB POWER SUPPLY 55V, 12V, 80V,-12.5V CHECK POWER SAVING CIRCUIT, H-SYNC, V-SYNC SIGNAL Q909, Q910 CHECK THE HIGE VOLTAGE OF CRT REFER ITEM S.M.P.S ABOUT 24 ~ 26KV CHECK FAILSAFE CKT IC401 PIN 25 RELATIVE CKT CHECK THE VOLTAGE OF CRT...
  • Page 15 2.ABNORMAL VIDEO LEVEL ON SCREEN 3. ABNORMAL DDC (PLUG & PLAY) CHECK IC101 PIN 5 VOLTAGE ABOUT 5V CHECK ZD901 GOOD OR FAIL CHECK SIGNAL CABLE OR P803 HS,VS DATA OUTPUT...
  • Page 16 6-2 ABNORMAL DISPLAY 1.NO SIGNAL ON SCREEN...
  • Page 17 6-3 NO BLANKING CHECK THE RELATIVE CIRCUIT OF BLANKING CHECK THE RELATIVE CIRCUIT OF Q705 CHECK R879,D706,D863,C873 ON VIDEO PCB,CHECK G1 RELATIVE CIRCUIT FBT PIN 4 ON MAIN PCB 6-4 HOR./OSC/DEF/HV CIRCUIT FAULT 1. NO RASTER (DISCONNECT WITH SIGNAL CABLE) CHECK IC401 PIN 29 ABOUT 12 VDC CHECK IC401 PIN 29 RELATIVE CIRCUIT...
  • Page 18 6-5 ABNORMAL HORIZONTAL DEFLECTION 1. ABNORMAL HORIZONTAL WIDTH OF VIDEO READJUST H-WIDTH FUNCTION CHECK THE RELATIVE CIRCUIT OF Q404, Q405, & Q406 CHECK FBT B+ VOLTAGE ABOUT 62V AT FH=31KHz CHECK THE RELATIVE CIRCUIT OF SMPS. CHECK THE HV OF CRT ABOUT 24.5KV 2.
  • Page 19: Abnormal Vertical Scanning

    6-6 ABNORMAL VERTICAL SCANNING 1. ABNORMAL VERTICAL SIZE READJUST V-SIZE FUNCTION VALUE CHECK THE IC601 PIN 2 ABOUT 11.8V PIN 4 ABOUT -12V CHECK D601, C605 RELATIVE CIRCUIT READJUST V-SIZE FUNCTION VALUE AND CHECK IC601 PIN1,7 CHECK IC401 PIN19,20,21,22,23 RELATIVE CIRCUIT CHECK IC601 PIN5 OUTPUT CHECK IC601 OUTPUT AND CRT RELATIVE CIRCUIT OR DY...
  • Page 20: Power Supply Trouble Shooting Chart

    6-9 POWER SUPPLY TROUBLE SHOOTING CHART BEFORE CHECK SW.REG. PLEASE REFER TO THE POWER SUPPLY BLOCK DIAGRAM POWER SUPPLY OUTPUT: (A) VARIABLE OUTPUT : 58V - 145V (DEPENDING EPENDING UPON H.SYNC FREQUENCY) CONSTANT OUTPUT : 6.3V, 14V, -12V, 78V BEAD SET ABNORMAL VARIABLE OUTPUT MAKE SURE THAT THE VARIABLE...
  • Page 21: Mechanical Of Cabinet Front Dis-Assembly

    7. MECHANICAL OF CABINET FRONT DIS-ASSEMBLY...
  • Page 22: Bom List

    8. BOM LIST LOCATION PART NO. SPECIFICATION NUMBER UNIT CMS774B2NDLP CHASSIS FOR S774B-2DLP 1C 503 5T 476175 SCREW FOR CRT 11C 112500 6065 WIRE MOUNT 11C 115500 6065 FBT CLIP 11C6033 1 6065 PCB SUPPORT 19C 403 7 STEEL 26C 800700 4A6444 BARCODE 33C4238 B0 H6339 POWER KNOB...
  • Page 23 95C2070558 WIRE B1C1035 10 476175 SCREW 3.5X10 D1C1140 7128 SCREW 4X7(FOR AC) M1C1130 8128 SCREW 3.0X8 Q1C 340 16 476175 SCREW 750A1697504JRG6257 .05*110TS 95C205T 3006A Wire Harness AMS774B2NDLP MAIN BOARD FOR S774B-2D CRS774B2NDLP CRT BOARD FOR S774B-2DL 15C5640 1 A B GND LUG 15C5659501 1 REAL BRACKET...
  • Page 24 C427 63C210J2042CC 0.2UF 250V BY CAMEL C432 67C 21547011J 47UF +-20% 200V JAMICON C451 65C 1K102 5T6921 1NF/1KV Y5P+-10% C482 67C 21547011J 47UF +-20% 200V JAMICON C713 67C 305100 12 10UF +-20% 250V C900 63C107K105 US 1.0UF 300VAC C907 67C 3015115X 150UF 450V C911 65C 1K101 5T6921...
  • Page 25 L906 73C 253 88 HB CHOCK LED2 81C 11500 GP P402 33C3192 4A 36176 4P PLUG P803 33C3278 7D WAFER*PLUG PR901 61C 52459 2G6167 PTCR 4.5 OHM +-20% Q907 57C2015 1A 2SB772-P Q909 57C2015 1A 2SB772-P R401 61C152M109 64 MOFR 1 OHM +-5% 2W R407 61C152M158 64 0.15 OHM +-5% 2W...
  • Page 26 C104 67C 309101 3T 100UF +-20% 16V C105 65C 444101 5T 100 PF 10% 50V Y5P C106 65C 444101 5T 100 PF 10% 50V Y5P C107 65C 44222013T 22PF +-5% NPO 50V C108 65C 44222013T 22PF +-5% NPO 50V C109 65C 450104 7T 0.1UF +80-20% 50V Y5V C111...
  • Page 27 C449 64C178J473 1T 0.047UF C460 64C176J473 1T 0.047UF 100V C463 64C 44J1031AT .01UF +-5% 100V C470 64C178J104 1T C121X 0.1UF 100V +-5% C480 65C 1K470 5T6921 47P/1KV C481 65C 1K102 5T6921 1NF/1KV Y5P+-10% C483 67C 305221 3T 220UF +-20% 16V C488 65C 2K820 5T6921 82PF/2KV Y5P+-10%...
  • Page 28 C945 64C178J104 0T CL21X0.1UF 63V +-5% C946 63C212J1042AT MPE 0.1UF/250V +-5% C947 67C 309470 7T 47UF +-20% 50V D100 93C 64 1152T IN4148 D101 93C1002 1W52T 1N5817 D102 93C 64 1152T IN4148 D103 93C1002 1W52T 1N5817 D104 93C 64 1152T IN4148 D105 93C 64 1152T...
  • Page 29 J001 71C 55 29 FERRITE BEAD J002 71C 55 29 FERRITE BEAD J018 95C 90 23 JUMPER J035 61C 21022352T MFR 22K OHM +- 1% 1/6W J065 61C175L10052T CFR 10 OHM +-5% 1/2W J080 61C 21036352T 36KOHM 1/6W NR601 61C 58251 UT NTCR350OHM+-15%3000K UP Q402 57C 530503 T...
  • Page 30 R127 61C 60227352T CFR 27K OHM+-5% 1/6W R128 61C 60216352T CFR 16K OHM +-5% 1/6W R129 61C 60247152T CFR 470 OHM +-5% 1/6W R130 61C 60210352T CFR 10K OHM+-5% 1/6W R131 61C 60247252T CFR 4.7K OHM+-5% 1/6W R132 61C 60210152T CFR 100 OHM+-5% 1/6W R133 61C 60247252T...
  • Page 31 R434 61C 17239252T CFR 3.9K OHM +-5% 1/4W R436 61C 21022252T MFR 2.2K OHM +- 1% 1/6W R439 61C 17247252T CFR 4.7K OHM +-5% 1/4W R440 61C 20033252T MFR 3.3KOHM+-1% 1/4W R441 61C175L82352T CFR 82K OHM +-5% 1/2W R450 61C 17247352T CFR 47K OHM +-5% 1/4W R453 61C 17222452T...
  • Page 32 R901 61C175L10552T CFR 1M OHM +-5% 1/2W R902 61C 60239252T CFR 3.9K OHM+-5% 1/6W R904 61C 17212252T CFR 1.2K OHM +-5% 1/4W R905 61C 60251252T CFR 5.1K OHM+-5% 1/6W R906 61C 17210052T CFR 10OHM+-5% 1/4W R908 61C175L75952T CFR 7.5 OHM +-5% 1/2W R909 61C 17210152T CFR 100OHM+-5% 1/4W...
  • Page 33 ARS774B2NDLP CRT BOARD FOR S774B-2DL 40C 45762412B LABEL 87C3504 DL CRT COCKET(QQ FOCUS) 90C6113 5 HEAT SINK FOR IC801 705C774BR5601D IC802 ASS'Y C825 65C 1M103 3A6921 0.01UF 1K Z5U C828 65C 2M103 3A6921 10000PF 2KV C829 67C 305470 9 47UF +-20% 100V C843 65C 1K101 5T6921 100PF/1KV Y5P+-10%...
  • Page 34 C832 67C 309109 9T 1UF +-20% 100V C833 65C 450104 7T6921 0.1UF +80-20% 50V Y5V C834 65C251K104 2T 0.1UF 250V C835 65C 444152 5T 1500PF 10% Y5P 50V C836 65C 44212013T 12PF J NPO 50V C837 65C 44212013T 12PF J NPO 50V C838 65C 44212013T 12PF J NPO 50V...
  • Page 35 FB850 71C 55 19 T FERRITE BEAD 9X3.5X0.8 FB852 71C 55 19 T FERRITE BEAD 9X3.5X0.8 L801 61C 17247052T CFR 47 OHM +-5% 1/4W L802 61C 17247052T CFR 47 OHM +-5% 1/4W L803 61C 17247052T CFR 47 OHM +-5% 1/4W L804 71C 55 19 T FERRITE BEAD 9X3.5X0.8...
  • Page 36 C115 67C 309330 3T 33UF +-20% 16V IC101 56C1125569 X 62P4-KC421WT-000 IC102 56C1133 13 24LC08B/PG 95C 90 23 JUMPER 95C 90 23 JUMPER 95C 90 23 JUMPER 95C 90 23 JUMPER 95C 90 23 JUMPER C102 67C 309470 3T 47UF +-20% 16V IC101 56C1125107 X NT68F65UG/G...
  • Page 37 750C58522AV CPT 17" CV TCO A CRT C425 63C210J2743CC 0.27UF +-5% 400V C428 63C210J6442CC 0.64U 250V CAMEL C450 65C 1K151 5T6921 150PF 1KV Y5P +-10% R607 61C 208109 64 MOFR 1 OHM +-5% 1W R751 61C 60256152T 560OHM 1/6W TP404 95C2070557 WIRE 750C58522AV...
  • Page 38: Block Diagram

    BLOCK DIAGRAM IC801 NT6812K...
  • Page 39 BLOCK DIAGRAM (SMPS)
  • Page 40: Ic Block Diagrams

    IC BLOCK DIAGRAM IC101 NT6865 IC101 V-I/P WT62P4/NT6865 MUTE B+ H-I/P Reset H-LIN OSCO G-LED OSCI H-out ISDA V-out ISCL VSDA Stand by VSCL R-LED KEY1 KEY2 WABL DSCL DSDA Mute G1 VEHT H-sub HEHT NABL...
  • Page 42 IC801 NT6812KG...
  • Page 44 OCP/FB IC901 STR-G5643D...
  • Page 45: Pcb Layout

    11. PCB LAYOUT...
  • Page 47: Schematic Diagram

    12 .CHEMATIC DIAGRA - 47 -...