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Iiyama Vision Master 1451, Service Manual

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Iiyama Vision Master 1451 Service Manual Download Page 3

1

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. 2001

Summary of Contents for Vision Master 1451

Page 1: ...SERVICE MANUAL LS902U UT Copyright IIYAMA CORPORATION 710 1 KITAOWARIBE Nagano shi 381 0014 JAPAN...

Page 2: ...SERVICE MANUAL COLOR MONITOR LS902U UT F N S991V 01 A Date Oct 22 01 Version A00...

Page 3: ...N 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 CHANGE...

Page 4: ...CUIT DESCRIPTION 11 15 6 TROUBLE SHOOTING CHART 16 6 1 NO RASTER CRT RELATIVE CIRCUIT PROBLEMS 16 6 2 ABNORMAL DISPLAY 17 6 3 NO BLANKING 18 6 4 HOR OSC DEF HV CIRCUIT FAULT 19 6 5 ABNORMAL HORIZONTAL...

Page 5: ...TTL Level TTL Level TTL Level TTL Level Positive Negative Negative Positive Horizontal 720 H 640 H 648 H 800 H Vertical 400 V 480 V 480 V 600 V Fh kHz 31 327 31 469 43 269 53 750 Fv Hz 69 616 59 9 85...

Page 6: ...to 85 Relative Non Condensing 14 Weight 20 0 Kg Net 23 8Kg Gross 15 Dimensions Monitor Carton 574 W 594 H 537 D mm Monitor 460 W 470 H 466 D mm 16 External Connection 15 Pin D type Connector AC Power...

Page 7: ...afety test must be performed to verify that the display is safe to operate without danger or shock Always perform an AC leakage current check on the exposed metallic parts of the cabinet such as screw...

Page 8: ...pply It is important to maintain specified values of all components in the horizontal and high voltage circuits and anywhere else in the monitor that could cause a rise in high voltage or operating su...

Page 9: ...ws on the connector to ensure firm grounding The connector information is as follow 15 Pin Color Display Signal Cable PIN NO DESCRIPTION PIN NO DESCRIPTION 1 RED 9 NC 2 GREEN 10 GND 3 BLUE 11 SYNC GND...

Page 10: ...valent set mode 1 VGA 640X480 pattern 1 0 B Connect a DC Volt meter between TP901 or D922 cathode and ground then adjust VR901 to be 62 5VDC C Connect a DC Volt meter with HV probe 1000 1 between CRT...

Page 11: ...H SIZE G GAIN V CENTER B GAIN V SIZE R BIAS TC TOP CORNRT G BIAS BC BOTTOM CORNER R BIAS PINCUSHION 9300 COLOR TEMPERATURE TRAPEZOID 6500 COLOR TEMPERATURE PIN BALANCE DEGAUSS PARALLELOGRAM OSD EXIT R...

Page 12: ...5 y 297 5 Y 120 210cd m2 Then save to 9300K color temperature F Little white pattern adjust R or G or B gain to make x 313 5 y 329 5 Y 120 210cd m2 Then save to 6500K color temperature G All white pat...

Page 13: ...ue lines are converged by varying the angle between the two tabs of the 4 pole magnets on the PCM assembly See above diagrams D Horizontal red and blue lines are converged by varying the two tabs toge...

Page 14: ...the external data transfer through this pin to internal display registers and control registers Pin8 the clock input pin is used to synchronize the data transfer Pin10 is input the vertical flyback pu...

Page 15: ...otection mode In this mode several pins are forced into defined states Pin7 HDRV is floating Pin6 BDRV is floating Pin12 13 VOUT 1 2 are floating Pin16 CLBL provides a continuous blanking signal Verti...

Page 16: ...n Diode Q416 B MUTE D414 D417 D419 Buffer Diode for IC403 D421 D423 Detected for Q406 Q401 B Mute Control Q402 Horizontal Driver Q403 Horizontal Out Put Q404 Q406 A differential Amp for Drive Q405 Q40...

Page 17: ...Diode for Trigger CKT D925 Rectifier for B Supply D926 D927 Raster Position Control D939 Clip Diode for Snuffer Pulse ZD901 Protection Diode ZD902 Protection Diode ZD903 Protection Diode Q901 MOS FET...

Page 18: ...6 3V CHECK VOLTAGE OF THE CRT CHECK BRIGHTNESS CIRCUIT OK CHECK POWER SAVING CIRCUIT ABNORMAL DISPLAY H SYNC V SYNC SIGNAL REFER ITEM 8 2 CATHODE ABOUT 60V TO 70V CHECK SCREEN VOLTAGE ABOUT 400V TO 7...

Page 19: ...CHECK IC801 PIN 13 ABOUT 4V PIN 6 9 22 ABOUT 12V CHECK IC801 PIN 15 CLAMP PULSE PIN 18 20 23 ABOUT 4Vpp CHECK THE IC105 RELATIVE CIRCUIT PIN 16 BLANK PULSE PIN 26 27 28 ABOUT 4V OR CHECK Q801 AND RELA...

Page 20: ...CHECK THE VOLTAGE OF FBT SCREEN CHECK THE RELATIVE CIRCUIT CHECK THE 12V PIN OF SMPS ON MAIN PCB RELATIVE CIRCUIT OF P802 CONNECTOR ABOUT 400V TO 700V EXCEED 700V OF IC801 CHECK FBT CRT RELATIVE CIRC...

Page 21: ...OSC DEF HV CIRCUIT FAULT 1 NO RASTER DISCONNECT WITH SIGNAL CABLE NG OK OK OK NG NG NG CHECK THE COLLECTOR VOLTAGE CHECK THE COLLECTOR VOLTAGE RELATIVE CIRCUIT RELATIVE CIRCUIT CHECK IC401 PIN 26 31 C...

Page 22: ...Q912 Q914 Q915 IC401 PIN 4 5 6 VR 902 ABOUT 60 5V AT FH 31KHz CRT ABOUT 26KV 2 ABNORMAL HORIZONTAL RASTER CENTER P403 AND JUMPER CHECK T903 D926 D927 R964 R968 3 ABNORMAL HORIZONTAL VIDEO CENTER CHEC...

Page 23: ...BOUT 40V CHECK IC601 PIN 6 OUTPUT ABOUT 38Vpp CHECK ZD601 ZD602 R626 SMPS CHECK IC401 PIN 22 23 24 CHECK IC401 PIN 12 13 2 VERTICAL CENTER NG READJUST V CENTER CHECK IC101 PIN 9 10 IC401 PIN 18 19 6 7...

Page 24: ...OK OK NG OK NG YES NO CHECK BRIDGE RECTIFIED CIRCUIT 6 3V CIRCUIT CHECK START C K T CHECK POWER SAVING C K T OFF MODE CHECK IC401 CHECK D919 CHECK Q911 Q911 FAILURE CHECK Q901 CHECK IC901 CHECK AC LI...

Page 25: ...23 7 MECHANICAL OF CABINET FRONT DIS ASSEMBLY...

Page 26: ...EL 40A 581 26 704 LABEL FOR CARTON PALLET 40A 581 624 10A H V LABEL 40A 581 695 1A SERIAL LABEL 40A 581 695 6A EUROPE LABEL 40A 581 695 14A FRONT LABEL LS902UT 40A2042 695 2A ID LABEL 41A 68 508 A MAN...

Page 27: ...NE END D1A1140 7 128 SCREW 4X7 FOR AC M1A1140 6 128 SCREW MTG SIGNAL CABLE Q1A1040 14 128 SCREW 705A791S C79 01 SAMPO FBT ASS Y 705A991S C56 01 IC601 ASS Y 705A991S C57 01C Q901 ASS Y 705A991S C57 01Y...

Page 28: ...DF901 71A 55 2 FERRITE BEAD 6 5 5 1 7 COVER D901 DOUBLE END DF902 71A 55 2 FERRITE BEAD 6 5 5 1 7 COVER D902 DOUBLE END DF903 71A 55 2 FERRITE BEAD 6 5 5 1 7 COVER D903 DOUBLE END DF904 71A 55 2 FERR...

Page 29: ...1A152M 150 64 MOFR 15 OHM 5 2W R968 61A152M 150 64 MOFR 15 OHM 5 2W R979 61A152M 471 64 MOFR 470 OHM 5 2W RY401 77A 260 5 3 RELAY RY901 77A 260 5 2W RELAY OSA SS 212DM5 SG401 62A 10 16 J SPARK GAP 1KV...

Page 30: ...P 50V C454 65A 450 104 7T 0 1UF 80 20 50V Y5V C455 67A 309 109 7T 1 0UF 20 50V C456 65A 450 104 7T 0 1UF 80 20 50V Y5V C459 65A 442 101 13T 100PF 5 NPO 50V C460 65A 442 101 13T 100PF 5 NPO 50V C461 67...

Page 31: ...21 D411 93A 64 11 52T DIODE 1N4148 D412 93A 64 11 52T DIODE 1N4148 D413 93A 64 11 52T DIODE 1N4148 D414 93A 60 21P 52T PS156R D415 93A 60 21P 52T PS156R D417 93A 60 21P 52T PS156R D418 93A 64 11 52T D...

Page 32: ...TED J027 95A 90 23 TIN COATED J028 95A 90 23 TIN COATED J029 95A 90 23 TIN COATED J030 95A 90 23 TIN COATED J031 95A 90 23 TIN COATED J032 95A 90 23 TIN COATED J033 95A 90 23 TIN COATED J034 95A 90 23...

Page 33: ...90 23 TIN COATED J098 95A 90 23 TIN COATED J099 95A 90 23 TIN COATED J100 95A 90 23 TIN COATED J101 95A 90 23 TIN COATED Q904 J102 61A 172 102 52T CFR 1KOHM 5 1 4W J103 95A 90 23 TIN COATED J104 95A 9...

Page 34: ...C TAPING Q710 57A 420 P T TRAN 2SA733P NEC TAPING Q906 57A 594 504 T KSP44TA Q907 57A 419 P T TRAN 2SC945P NEC TAPING Q910 57A 419 P T TRAN 2SC945P NEC TAPING Q912 57A 446 1 T TRAN 2SC1213AC HITACHI Q...

Page 35: ...150KOHM 5 1 2W R423 61A 602 563 52T CFR 56K OHM 5 1 6W R424 61A 602 100 52T CFR 10 OHM 5 1 6W R425 61A 172 220 52T CFR 22OHM 5 1 4W R427 61A175L 220 52T CFR 22 OHM 5 1 2W R430 61A 602 472 52T CFR 4 7K...

Page 36: ...2 222 52T CFR 2 2K OHM 5 1 6W R631 61A 602 471 52T CFR 470 OHM 5 1 6W R634 61A 602 471 52T CFR 470 OHM 5 1 6W R635 61A175L 479 52T CFR 4 7 OHM 5 1 2W R636 95A 90 23 TIN COATED R701 61A 602 103 52T CFR...

Page 37: ...HM 5 1 4W R940 61A 171 183 52T CFR 18K OHM 2 1 4W R941 61A 172 181 52T CFR 180 OHM 5 1 4W R942 61A 172 101 52T CFR 100OHM 5 1 4W R954 61A175L 203 52T CFR 20K OHM 5 1 2W R955 95A 90 23 TIN COATED R956...

Page 38: ...XHA R820 61A 208 390 64 MOFR 39 OHM 5 1W R835 71A 55 19 T FERRITE BEAD 9X3 5X0 8 R872 61A175L 101 52T CFR 100 OHM 5 1 2W R878 61A 208 129 64 MOFR 1 2OHM 5 1W SG801 62A 10 2K SPARK GAP 200V 20 KUB SG80...

Page 39: ...02 93A 64 11 52T DIODE 1N4148 D803 93A 64 11 52T DIODE 1N4148 D804 93A 64 11 52T DIODE 1N4148 D805 93A 64 11 52T DIODE 1N4148 D806 93A 64 11 52T DIODE 1N4148 D850 93A 64 501 52T SWITCHING DIODE BAV21...

Page 40: ...602 100 52T CFR 10 OHM 5 1 6W R816 61A 602 102 52T CFR 1K OHM 5 1 6W R817 61A 172 333 52T CFR 33KOHM 5 1 4W R818 61A 602 203 52T CFR 20K OHM 5 1 6W R819 95A 90 23 TIN COATED R821 61A 172 151 52T CFR...

Page 41: ...128 SCREW M3x6 M1A1730 8 128 SCREW M3x8 IC803 56A 551 501 LM2437T 705A791SC79 01 SAMPO FBT ASS Y J127 61A 602 153 52T CFR 15K OHM 5 1 6W R408 61A 172 562 52T CFR 5 6K OHM 5 1 4W R439 61A 172 822 52T...

Page 42: ...25 57A 728 3 HSB772P HSB772E HI SINCE 705A991VC93 01 D921 ASS Y D921 93A3020 12 RL 3 SANKEN 750A54551AV9VC 19 LG TCO95 99 ASS Y 52A6007 7 42CM 52A6007 8 47CM 750A5455 1AV LG 19 0 26 ART COATING C C449...

Page 43: ...L901 L902 FILTER LINE D901 D904 CIRCUIT RETIFIER IC601 V OUTPUT Q802 Q807 O P AMP VIDEO Q817 Q819 H F B X RAY B VR902 B CONTROL H V PROCESSOR OFF CS0 CS6 V SYNC O H SYNC O B B G B R B B D G D R D SUS...

Page 44: ...fkqb mNML aM mNNL aN mNOLe iceM mNPLe iceN x bzmNQ mNR lp N lp M saa a M a N a O lrqmrq P lrqmrq O s lrqmrq Q s lrqmrq N NQ N NP NO NN NM V U O P Q R S T H J H J PM NR NQ NP NO NN PN PO PP PQ PR PS NM...

Page 45: ...ATOR V SYNC CORRECTION AND POLARITY H C SYNC INPUT REFERENCE AND SUPPLY 2 RECEIVER I C BUS OUTPUT HUNLOCK AND V BLANK CLAMPING VIDEO CORRECTION AND POLARITY V SYNC INPUT R DRIVE ADJ G DRIVE ADJ B DRIV...

Page 46: ...E GENERATOR CURRENT IC901 3842 VCC GND O P Ct Rt Is COMP F B Vref 8 2 1 3 4 6 5 7 U V L O 36V 1V 1 2 Vref OSCILLATOR LATCH PWM S R COMP C S 1 3 AMP ERR LOGLC RESET SET Vref 5V BIAS INTERNAL IC601 TDA4...

Page 47: ...OL CONTROL DISPLAY 15 14 13 12 11 WB WG WR VCLKX BLINK 7 CH 8 HORD 8 VERTD VSP HSP OSDENB SHADOW BSEN CONTROL FRAME WINDOWS LPN 9 DADDR 5 RCADDR VCLKS CWS BORDER LUMA GENERATOR BORDGER LUMINANCE CHARA...

Page 48: ...46 11 PCB LAYOUT 11 1 MAIN PCB LAYOUT...

Page 49: ...47 11 2 CRT BOARD LAYOUT...

Page 50: ...J 73A253 C450 R439 8K2 Q404 2SA733 Q413 2SC945 4K7 R117 BYV26C D706 1500 C451 C431 250V 2 2UF 82K R434 1 4W 7K5 R435 C405 1UF R443 F 120K R436 R433 2K TIP122 Q405 2SA733 Q406 C423 2K2 R432 2K2 R465 C9...

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