Iiyama Vision Master 1451 Service Manual
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Iiyama Vision Master 1451 Service Manual

Iiyama Vision Master 1451 Service Manual

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SERVICE MANUAL

LS902U/UT
IIYAMA CORPORATION
Copyright
710-1 KITAOWARIBE, Nagano-shi 381-0014 JAPAN

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Summary of Contents for Iiyama Vision Master 1451

  • Page 1: Service Manual

    SERVICE MANUAL LS902U/UT IIYAMA CORPORATION Copyright 710-1 KITAOWARIBE, Nagano-shi 381-0014 JAPAN...

  • Page 2: Color Monitor

    SERVICE MANUAL COLOR MONITOR (LS902U/UT) F/N : S991V-01-A Date : Oct-22-01 Version : A00...
  • Page 3 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: OCTOBER.

  • Page 4: Table Of Contents

    TABLE OF CONTENTS PAGE 1. SPECIFICATIONS ..................... 2. PRECAUTION AND NOTICES ................2-1 SAFETY PRECAUTIONS ................2-2 PRODUCT SAFETY NOTICE ............... 2-3 SERVICE NOTES ................... 2-4 HIGH VOLTAGE WARNING ............... 3. OPERATING INSTRUCTIONS ................4. ADJUSTMENT ......................4-1 ADJUSTMENT CONDITIONS AND PRECAUTIONS ....... 4-2 MAIN ADJUSTMENTS .................

  • Page 5: Specifications

    1. SPECIFICATIONS FOR 9Klr SERIES COLOR MONITOR CRT : 48.3CM(19") 90 Deflection, 29mm Neck, Pure flat 0.25mm Dot Pitch, Non-Glare Screen Viewable image Size: 45.7CM (18") diagonal Display Color: Unlimited Colors External Controls: Power On/Off, OSD key, Function knob: Contrast, Brightness, H-Size, H-Center, V-Size, V-Center, ZOOM, Pincushion, Trapezoid, Pin-Balance, Parallelogram, Rotation, Moire Reduce, Recall, Degaussing, Color Temperature, Volume (Option).
  • Page 6 11. Power Source: Switching Mode Power Supply AC 100 ~240V, 50/60Hz Universal Type 12. Operating Temperature: 0°C to 40°C Ambient 13. Humidity : 10% to 85% Relative, Non-Condensing Weight: 20.0 Kg(Net), 23.8Kg(Gross) • Dimensions Monitor: Carton: 574(W) × 594(H) × 537(D) mm Monitor: 460(W) ×...

  • Page 7: Precaution And Notices

    2. PRECAUTIONS AND NOTICES SAFETY PRECAUTIONS 1. 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 8: High Voltage Warning

    HIGH VOLTAGE WARNING Operation of monitor outside of cabinet or with back removed may cause a serious shock hazard. Work on this model should only be performed by those who are thoroughly familiar with precautions necessary when working on high voltage equipment. Exercise care when servicing this chassis with power applied.

  • Page 9: Operating Instructions

    3. OPERATING INSTRUCTIONS This procedure gives you instructions for installing and using the 9K 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 10: Adjustment

    4. ADJUSTMENT 4-1ADJUSTMENT 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 11 FACTORY PRESET H: 36.51kHz H: 68.7KHz V: 85.0Hz V: 51.34Hz 6500 9300 CONTRAST H-MOIRE REDUCE BRIGHTNESS V-MOIRE REDUCE H-CENTER R-GAIN H-SIZE G-GAIN V-CENTER B-GAIN V-SIZE R-BIAS TOP CORNRT G-BIAS BOTTOM CORNER R-BIAS 9300 PINCUSHION COLOR TEMPERATURE 6500 TRAPEZOID COLOR TEMPERATURE PIN-BALANCE DEGAUSS PARALLELOGRAM...
  • Page 12 MENU Key to Quit the OSD window. Mean while the new setting data will be saved in the memory. E. To switches the input signal to the other Timing Mode. Please follow step C ~ D to get the optimum picture. F.
  • Page 13 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 14: Circuit Description

    5. CIRCUIT DESCRIPTION 5-1 MICRO CONTROLLER CIRCUIT MICRO Controller The IC101 contains a 6502 8-bit CPU core, 256 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 15 X-ray Protection The X-ray protection input pin2 provides a voltage detector with a precise threshold. If the voltage exceeds this threshold for a certain time, an internal latch switches the whole IC into protection mode. In this mode several pins are forced into defined states: Pin7 (HDRV) is floating Pin6 (BDRV) is floating...
  • Page 16 5-3 TRANSISTOR & DIODE CIRCUIT LOCATION FUNCTION AL DESCRIPTION D101 For C102 Discharge Q101 For LED Indicator Control D418 Protection Diode for Snubber Clip Diode ZD401 D431 Protection Diode for B+ Control D405, D424 Speed up for Q403 D406, D407 Supply a bias for D408 D408 Damping Diode and Modulation Diode...
  • Page 17 LOCATION FUNCTION AL DESCRIPTION D706,D708 Rectifier for -200V Supply Q707 Picture Mute Control AMP Q703, Q706 Brightness Control CKT Q708 Vertical Dynamic Focus Control AMP D901 ~ D904 Bridge Rectifier for AC Source D909 Rectifier for Start Power Supply D910 Clip Diode for Snubber CKT D911 IC901 VCC Supply...

  • Page 18: Trouble Shooting Chart

    6.TROUBLE SHOOTING CHART 6-1 NO RASTER, CRT RELATIVE CIRCUIT PROBLEMS CHECK MAIN PCB POWER CHECK MAIN PCB POWER SUPPLY SUPPLY 47.0V,13.5V,80V 60.5V, 14.5V, 80V CHECK POWER SAVING CIRCUIT, H-SYNC, V-SYNC SIGNAL CHECK THE HIGE VOLTAGE REFER ITEM S.M.P.S. OF CRT ABOUT 25.5 ~ 26.5KV CHECK FAILSAFE CKT IC401 PIN 2 RELATIVE CKT.
  • Page 19 2.ABNORMAL VIDEO LEVEL ON SCREEN CHECK THE VOLTAGE OF IC801 CHECK THE VOLTAGE OF IC801 PIN7,15,18,21 ABOUT 12V PIN 6, 9, 22 ABOUT 12V CHECK 12V RELATIVE CIRCUIT CHECK THE SIGNAL INPUT OF R.G.B. ABOUT 0.7Vpp CHECK SIGNAL CABLE OR INTERFACE CARD.

  • Page 20: Abnormal Display

    6-2 ABNORMAL DISPLAY 1.NO SIGNAL ON SCREEN CHECK VIDEO IC801 VCC ABOUT 12V CHECK THE 12V PIN OF P802 CONNECTOR CHECK THE OUTPUT VOLTAGE CHECK THE OUTPUT VOLTAGE OF IC801 PIN 16,19,22 OF IC801 PIN 18, 20, 23 ABOUT 3Vpp CHECK THE RELATIVE CIRCUIT OF IC801 CHECK THE B+ VOLTAGE OF...

  • Page 21: No Blanking

    6-3 NO BLANKING CHECK THE RELATIVE CIRCUIT OF BLANKING CHECK THE RELATIVE CIRCUIT OF C433, D410, R635, R636, IC105 ON MAIN PCB CHECK IC801 PIN 16 ON VIDEO PCB, CHECK G1 RELATIVE CIRCUIT Q705, R718, C707 ON MAIN PCB 6-4 HOR./OSC/DEF/HV CIRCUIT FAULT 1.

  • Page 22: Abnormal Horizontal Deflection

    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 CHECK FBT B+ VOLTAGE 62.5V AT FH=31KHz ABOUT 60.5V AT FH=31KHz CHECK THE RELATIVE CIRCUIT OF SMPS.

  • Page 23: Abnormal Vertical Scanning

    6-6 ABNORMAL VERTICAL SCANNING 1. ABNORMAL VERTICAL SIZE READJUST V-SIZE FUNCTION VALUE CHECK THE IC601 PIN 7 ABOUT 40V CHECK ZD601, ZD602 R626 & SMPS RELATIVE CIRCUIT CHECK VERT. OSC CIRCUIT CHECK IC401 PIN 22, 23, 24 CHECK IC601 PIN 6 OUTPUT ABOUT CHECK IC401 PIN 12, 13 38Vpp RELATIVE CIRCUIT...

  • Page 24: 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 : 60.5V - 145V (DEPENDING EPENDING UPON H.SYNC FREQUENCY) CONSTANT OUTPUT : 6.3V, 14.5V, 55V, 80V BEAD SET ABNORMAL VARIABLE OUTPUT MAKE SURE THAT CHECK AC LINE...

  • Page 25: Mechanical Of Cabinet Front Dis-Assembly

    7. MECHANICAL OF CABINET FRONT DIS-ASSEMBLY...

  • Page 26: Parts List Of Cabinet

    8.PARTS LIST OF CABINET LOCATION S991VZIWYMNWL SPECIFICATION REMARK CKS991VNYM KEY BOARD CMS991VNYML CHASSIS S991V-1L IIYAMA 1A6003- 21-128 CRT SCREW 5A6009- 1 CRT WASHER 7A 1- 12 11A 112- 1 WIRE MOUNTS 11A 112-500 WIRE MOUNT 11A 115- 1 FBT CLIP...
  • Page 27 750A1697- 75- I 0.5*80TS DEG.COIL 750A5455-1AV LG 19"0.26 ART COATING CKS991VNYM KEY BOARD 715A 856- 2 KEPC H105 95A8013- 5- 15 HARNESS 5P-2P 230MM J001 95A 90- 23 TIN COATED R101 61A 602-562-52T CFR 5.6KOHM+-5% 1/6W R103 61A 602-682-52T CFR 6.8K OHM+-5% 1/6W R105 61A 602-272-52T CFR 2.7K OHM+-5% 1/6W...
  • Page 28 C719 64A178J-824- 1A .82UF 100V C900 65A305M-472-2B2 4700PF +-20% 400VAC PY17 C902 63A 107-224- HS INTERFERENCE SUPPRESSORS C903 65A305M-332-2B2 3300PF 250VAC/400VAC C904 65A305M-332-2B2 3300PF 250VAC/400VAC C907 67A 30-151-15K 150UF+-20% 450V C907C 65A305M-472-2B2 4700PF +-20% 400VAC PY17 C909 63A108K-334- CS X1.0.33uF 300VAC +-10% C913 63A213J-684-4FC .68UF/630V...
  • Page 29 P105 33A3278- 5 5 PIN FOR PIN2 PIN6 P402 33A3192- 4 4P PLUG P701 33A3803- 3 WAFER EH-E P903 33A8009- 3 3 PIN PLUG PR901 61A 52- 27- 4G PTCR 9OHM+-20% 220V GAOL Q412 57A 610-501 IRF640A BY FAIRCHILD Q417 57A 610-501 IRF640A BY FAIRCHILD Q418...
  • Page 30 C403 64A 45G-103-1AT .01UF +-2% 100V C404 64A176J-472- 1T 0.0047UF +-5% 100V C405 67A 60-109- 7T 1UF +-20% 50V C406 95A 90- 23 TIN COATED C408 63A212J-473-2AT 0.047 250V +-5% C409 67A 309-100- 7T 10UF +-20% 50V C410 65A 442-101-13T 100PF +-5% NPO 50V C412 65A 444-101- 5T...
  • Page 31 C922 65A517M-103- 3T 10NF/500V Z5U +-20% C923 65A 1K-221- 2T 220PF/1KV Z5P+-10% C924 64A700J-332-0AT 3.3nF/50V +-5% C926 67A 305-470- 7T 47UF +-20% 50V C930 67A 305-470- 7T 47UF +-20% 50V C932 65A 442-101-13T 100PF +-5% NPO 50V C935 67A 305-470- 7T 47UF +-20% 50V C937 67A 309-101- 3T...
  • Page 32 D927 93A 60-38T-52T FR103 D939 93A 64- 11-52T DIODE 1N4148 FB401 71A 55- 19- T FERRITE BEAD 9X3.5X0.8 FB902 71A 55- 19- T FERRITE BEAD 9X3.5X0.8 FB903 95A 90- 23 TIN COATED FB904 71A 55- 19- T FERRITE BEAD 9X3.5X0.8 J001 95A 90- 23 TIN COATED...
  • Page 33 J065 95A 90- 23 TIN COATED J066 95A 90- 23 TIN COATED J067 95A 90- 23 TIN COATED J068 95A 90- 23 TIN COATED J069 95A 90- 23 TIN COATED J070 95A 90- 23 TIN COATED J071 95A 90- 23 TIN COATED J072 95A 90- 23...
  • Page 34 Q404 57A 420- P- T TRAN 2SA733P/NEC TAPING Q406 57A 420- P- T TRAN 2SA733P/NEC TAPING Q407 57A 446- 1- T TRAN.2SC1213AC/HITACHI Q408 57A 721- 1- T DTC114ESA Q410 57A 419- SG- T KSC945C-G TA FAIRCHILD Q411 57A 419- SG- T KSC945C-G TA FAIRCHILD Q413 57A 419- SG- T...
  • Page 35 R152 61A 172-103-52T CFR 10KOHM +-5% 1/4W R161 61A 172-473-52T CFR 47K OHM +-5% 1/4W R162 61A 172-473-52T CFR 47K OHM +-5% 1/4W R163 61A 172-181-52T CFR 180 OHM +-5% 1/4W R164 61A 602-100-52T CFR 10 OHM +-5% 1/6W R165 61A 602-103-52T CFR 10K OHM+-5% 1/6W R167...
  • Page 36 R465 61A 602-222-52T CFR 2.2K OHM +-5% 1/6W R466 61A 172-104-52T CFR100K OHM +-5% 1/4W R467 61A175L-681-52T CFR 680 OHM +-5% 1/2W R468 61A 400- 47-52T MFR 2.87KOHM +-1% 1/4W R470 61A 602-222-52T CFR 2.2K OHM +-5% 1/6W R471 61A 602-152-52T CFR 1.5K OHM +-5% 1/6W R472 61A175L-154-52T...
  • Page 37 R737 93A 64- 11-52T DIODE 1N4148 R738 61A 172-102-52T CFR 1KOHM +-5% 1/4W R739 61A175L-333-52T CFR 33K OHM +-5% 1/2W R740 61A175L-274-52T CFR 270K OHM +-5% 1/2W R741 61A 602-562-52T CFR 5.6KOHM+-5% 1/6W R742 61A175L-154-52T CFR 150KOHM+-5% 1/2W 10MOHM +-5% 1/2W S R900 61A212Y-106-52T R902...
  • Page 38 ZD407 93A 39-536-52T HITACHI HZ11C3 ZD408 93A 39- 52-52T HZ5C2 5.1V 5% 0.5W/HITAC ZD409 93A 39-515-52T TZX3V0C ZD410 93A 39-515-52T TZX3V0C ZD702 93A 39-532-52T TZX24B TFK ZD704 93A 39-528-52T ZENER DIODE HZ9A2 ZD901 93A 39-522-52T TZX20B ZD902 93A 39-549-52T HZ16-1/HITACHI ZD903 93A 39-502-52T HZ18-1...
  • Page 39 C828 65A 442-100-13T 10PF +-5% NPO 50V C840 67A 309-109- 9T 1UF +-20% 100V C848 65A517K-102- 5T 1000PF 500V +-10% Y5P C851 67A 309-470- 7T 47UF +-20% 50V C853 67A 70-109- 9T 1UF +-20% 100V C854 67A 70-109- 9T 1UF +-20% 100V C855 67A 70-109- 9T 1UF +-20% 100V...
  • Page 40 J812 95A 90- 23 TIN COATED J813 95A 90- 23 TIN COATED J814 95A 90- 23 TIN COATED J815 95A 90- 23 TIN COATED J816 95A 90- 23 TIN COATED J817 95A 90- 23 TIN COATED J818 95A 90- 23 TIN COATED J819 95A 90- 23...
  • Page 41 R864 61A 172-681-52T CFR 680 OHM +-5% 1/4W R865 61A 172-681-52T CFR 680 OHM +-5% 1/4W R866 61A 602-103-52T CFR 10K OHM+-5% 1/6W R867 61A 602-103-52T CFR 10K OHM+-5% 1/6W R868 61A 602-103-52T CFR 10K OHM+-5% 1/6W R873 61A175L-101-52T CFR 100 OHM +-5% 1/2W R874 61A175L-101-52T CFR 100 OHM +-5% 1/2W...
  • Page 42 IC917 56A 133- 12-STM L7812CV/MOROCCO 705A991VC57 02 Q420 ASS'Y 90A 360- 2 HEAT SINK M1A1730- 6-128 SCREW M3x6 Q420 57A 610-501 IRF640A BY FAIRCHILD 705A991VC5702S Q425 ASS'Y 32A3028-502 MICA 90A 360- 2 HEAT SINK M1A1730- 8-128 SCREW M3x8 Q425 57A 728- 3 HSB772P/HSB772E HI-SINCE 705A991VC93 01 D921 ASS'Y...

  • Page 43: Block Diagram (Deflection)

    9. BLOCK DIAGRAM...

  • Page 44: Ic Block Diagrams

    10. IC BLOCK DIAGRAM f`QMPLf`QMQ f`NMN ij POQ rj SUSN a^`O spvk`NLfkqs lrqmrq=N lrqmrq=Q fksboqfkd fksboqfkd a^`N epvk`N fkmrq=N fkmrq=Q klkJfksboqfkd klkJfksboqfkd a^`M a^`P fkmrq=N fkmrq=Q obpbq| a^`Q klkJfksboqfkd klkJfksboqfkd a^`R fkmrq=O fkmrq=P fksboqfkd fksboqfkd a^`S fkmrq=O fkmrq=P lp`M a^`T lrqmrq=O lrqmrq=P lp`N...
  • Page 45 IC401 TDA4856/41 IC401 TDA4856 EW-OUTPUT V-SYNC INPUT VERTICAL EHT COMPENSATION V-OUTPUT V-SYNC H-PINCUSHION AND POLARITY OSCILLATOR INTEGRATOR H-SIZE AND V-SIZE H-CORNER CORRECTION AND AGC V-LINEARITY H-TRAPEZIUM V-LINEARITY BALANCE H-SIZE VIDEO V-POSITION CLAMPING V-SIZE,VOVSCN AND V-BLANK HUNLOCK OUTPUT PROTECTION OUTPUT ASYMMETRIC AND SOFT START EW-CORRECTION I C-BUS...
  • Page 46 IC601 TDA4866 GUARD GUARD FLYBACK CIRCUIT GENERATOR AMPLIFIER A OUTA PROTECTION INPUT STAGE REEDB AMPLIFIER B OUTB IC904 LM7812 SERIES PASS INPUT OUTPUT ELEMENT CURRENT GENERATOR PROTECTION STARTING REFERENCE ERROR CIRCUIT VOLTAGE AMPLIFIER THERMAL PROTECTION IC901 3842 SET/ Vref Vref RESET U.V.L.O.
  • Page 47 IC103 MTV016/MTV018 8 DATA DATA CCS0 DISPLAY & ROW CCS1 SERIAL DATA DAEN CONTROL BLINK INTERFACE 2 RAEN CAEN REGISTERS CRADDR VDDA LUMA VSSA CHARACTER ROM BORDER 5 RCADDR ARWDB ADDRESS BUS HDREN 9 DADDR LUMINANCE & VDREN BORDGER ADMINISTRATOR VCLKS 5 WADDR NROW...

  • Page 48: Pcb Layout

    11 PCB LAYOUT 11-1 MAIN PCB LAYOUT...
  • Page 49 11-2 CRT BOARD LAYOUT...

  • Page 50: Schematic Diagram

    12 SCHEMATIC DIAGRAM CRPC-S769R IC801 P801 C840 R817 R819 TDA4886 C808 C877 R860 S991V FOR SNI JUMPPER R881 0.001 100V 120K D803 FB802 (NC) 500V 1/4W 715A802-* C802 1/4W 1N4148 R807 R818 C809 Q850 D856 J810 OSD-R F/R1 Q801 C856 BF422 FB803 R805...

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