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Fujitsu SERVICE MANUAL
COLOR MONITOR
MCM1514V D556Q 154V/C551
41A50-108-01

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Troubleshooting

   Summary of Contents for Fujitsu MCM1514V

  • Page 1: Color Monitor

    Fujitsu SERVICE MANUAL COLOR MONITOR MCM1514V D556Q 154V/C551 41A50-108-01...

  • Page 2

    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 3: 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 4: Specifications

    1. SPECIFICATIONS FOR 154V/C551 COLOR MONITOR CRT : 38.1CM(15V) 90 Deflection, 29mm Neck, 0.28mm Dot Pitch, Non-Glare Screen Viewable image Size: 35.0CM (13.8") diagonal Display Color: Unlimited Colors External Controls: Power On/Off, UP/Down key, Function key: Contrast, Brightness, H-Size, H-center, V-Size, V-Center, Pincushion, Trapezoid. Input Video Signal Mode 1 Mode 2...

  • Page 5: Precaution 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: 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 7: Operating Instructions

    3. OPERATING INSTRUCTIONS This procedure gives you instructions for installing and using the 154V/C551 Series 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. If the AC outlet in your location does not have provisions for the grounded type plug, the installer should attach the proper adapter to ensure a safe ground potential.

  • 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

    4. Focus adjustment: × A. Set mode 2 ( 640 480 Fh: 31.5KHz ) with character full page. B. Adjust external brightness to raster cutoff and external contrast to max. , then adjust focus VR to make the display be focused very well.

  • Page 10: Circuit Description

    5. CIRCUIT DESCRIPTION 5-1 MICRO CIRCUIT IC101 is CPU, This CPU has the following functions. 1. Detect timing mode by sensing the horizontal frequency, vertical frequency, the polarity of Hor. Sync and Ver. Sync. 2. Key board scan control. 3. Cs capacitor switch control. 4.

  • Page 11: Transistor & Diode Circuit

    5-5 TRANSISTOR & DIODE CIRCUIT LOCATION CIRCUIT FUNCTION DESCRIPTION D901 ~ D904 Bridge Rectifier for AC Source D909 Half-Wave Rectifier for Start CKT D910 Clamp Diode for Snubber CKT D919 Rectifier for Output Voltage D922 Rectifier for Output Voltage D923 Rectifier for Output Voltage D925 Rectifier for Output Voltage...

  • Page 12: Trouble Shooting Chart

    6.TROUBLE SHOOTING CHART 6-1 NO RASTER, CRT RELATIVE CIRCUIT PROBLEMS 1.ABNORMAL POWER SUPPLY 90V,12V CHECK MAIN PC BOARD CHECK POWER SAVING CIRCUIT Q909,Q910 CHECK THE HIGE VOLTAGE OF CRT ABOUT 23.5 ~ 25.5KV CHECK FAILSAFE CKT Q402,Q403 RELATIVE CKT. CHECK THE VOLTAGE OF CRT HEATER ABOUT 6.3V CHECK CRT’S HEATER RELATIVE CIRCUIT Q907,Q908...

  • Page 13

    2.ABNORMAL VIDEO LEVEL ON SCREEN CHECK THE VOLTAGE OF IC801 PIN 2,16 ABOUT 8V CHECK 8V RELATIVE CIRCUIT CHECK THE SIGNAL INPUT OF R.G.B. ABOUT 0.7Vpp CHECK SIGNAL CABLE OR INTERFACE CARD. CHECK IC801 PIN 11 ABOUT 10Vpp CHECK THE RELATIVE CIRCUIT OF Q813,Q814 OR CLAMP.

  • Page 14: Abnormal Display

    6-2 ABNORMAL DISPLAY NO SIGNAL ON SCREEN CHECK VIDEO IC VCC ABOUT 8V CHECK THE 12V PIN OF P802 CONNECTOR CHECK THE OUTPUT VOLTAGE OF IC801 PIN 13,15,18 ABOUT 3Vpp CHECK THE RELATIVE CIRCUIT OF Q813,Q814 & IC801 CHECK THE B+ VOLTAGE OF VIDEO PCB ABOUT 75V CHECK THE 80V RELATIVE CIRCUIT OF SMPS ON MAIN PCB...

  • Page 15

    FBT PIN 5 ON MAIN PCB...

  • Page 16: Hor./osc/def/hv Circuit Fault

    6-4 HOR./OSC/DEF/HV CIRCUIT FAULT NO RASTER (DISCONNECT WITH SIGNAL CABLE) CHECK IC401 PIN 29 ABOUT 11.5VDC CHECK IC401 PIN 29 RELATIVE CIRCUIT CHECK IC401 PIN 26 WAVE FROM ABOUT 3Vpp CHECK IC401 PIN 4 ~ 7, PIN 13 RELATIVE CIRCUIT CHECK THE COLLECTOR VOLTAGE OF Q402 ABOUT 30Vpp FROM ABOUT 3Vpp...

  • Page 17: Abnormal Vertical Scanning

    3. ABNORMAL HORIZONTAL VIDEO CENTER SET H-CENTER TO CENTER CHECK IC401 PIN 4,7 RELATIVE CIRCUIT 4. ABNORMAL HORIZONTAL LINEARITY CHECK L401,Q408,Q410,C427 & DY IC101 PIN 29 (CS1) 6-6 ABNORMAL VERTICAL SCANNING 1. ABNORMAL VERTICAL SIZE READJUAT V-SIZE FUNCTION VALUE CHECK THE IC601 ABOUT 11.8V PIN 6 CHECK D601,C606 RELATIVE CIRCUIT CHECK VERT.

  • Page 18: Side-pin Cushion Distortion

    6-7 SIDE-PIN CUSHION DISTORTION READJUST SIDEPIN FUNCTION VALUE CHEC RELA 6-8 POOR FOCUS READJUST FOCUS CONTROL CHEC LEAD...

  • Page 19: 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 : 90V - 160V (DEPENDING UPON H.SYNC FREQUENCY) (B) CONSTANT OUTPUT : 6.3V, 15V, -12V, 75V BEAD SET ABNORMAL VARIABLE OUTPUT CHECK AC LINE MAKE SURE THAT...

  • Page 21: Parts List Of Cabinet

    PARTS LIST OF CABINET LOCATION 154V/C551 SPECIFICATION (LOW RADIATION 220V) CMC556DQJ2 CHAS ASS'Y 503- SCREW RUBBER WASHER TERMINAL LUG 112- WIRE MOUNTS 112- WIRE MOUNT 115- FBT CLIP 6015 CRT SUPPORT 403- BUMPER STEEL SPRING 3598- ABS PLASTIC 3710- FUNC LED LENS 3735- KEY PAD 643-...

  • Page 22

    PARTS LIST OF CHAS LOCATION 154V/C551 SPECIFICATION CMP556DQJAI MAIN PC BOARD ASS'Y CRPC556DQJ2 CRT BOARD ASS'Y 421- SCREW LOCK WASHER 121- PC SUPPORT 5640- AL GND LUG 5643- REAR BRACKET 3662- LED HOLDER 581- 26 - CHASSIS LABEL 500- CABLE TIE FERRITE BEAD 100- FERRITE CORE...

  • Page 23

    C939 305- 102 - 1000uF +-20% 16V C942 309- 102 - 1000uF +-20% 25V C951 305- 470 - 47uF +-20% 200V C963 65A 305M- 472 - 4700PF +-20% 400VAC C964 65A 305M- 472 - 4700PF +-20% 400VAC F901 FUSE CN902 3074- 2P PLUG...

  • Page 24

    LOCATION D901 55P - DIODE IN5408 PEC D902 55P - DIODE IN5408 PEC D903 55P - DIODE IN5408 PEC D904 55P - DIODE IN5408 PEC D919 DIODE GUF30G D922 3020- STPR320 D923 3020- RG-4Z-LF-L1 H802 8013- HARNESS 9P-9P H803 8013- WIRE HARNESS 95A 205B- 30 -...

  • Page 25

    T402 T901 356T X'FMR TP901 211- TP902 211- VR701 335- 47K OHM +-30% VR702 75A 335M- 200K OHM METAL VR VR901 335- 100 OHM +-30% VR902 335- 22K OHM +-30% X101 8.0000 MHZ...

  • Page 26

    PARTS LIST OF MAIN PC BOARD LOCATION 154V/C551 SPECIFICATION BRASS 715A 684- MAIN BOARD C103 450- 104 - 0.1uF +80-20% Y5V 50V C104 309- 101 - 100uF +-20% 25V C105 450- 104 - 0.1uF +80-20% Y5V 50V C106 309- 330 - 33uF +-20% 50V C109 229 -...

  • Page 27

    C611 450- 104 - 0.1uF +80-20% Y5V 50V C612 309- 470 - 47uF +-20% 16V C613 176J- 104 - 0.1UF +-5% 63V C614 444- 101 - 100 PF 10% 50V Z5P C615 44J- 103 - 0.01UF 100V C623 176J- 104 - 0.1UF +-5% 63V...

  • Page 28

    LOCATION 154V/C551 SPECIFICATION C705 309- 220 - 22uF +-20% 50V C707 176J- 223 - 0.022uF +-5% 250V C709 561 - 560PF +-10% Y5P 1KV C710 176J- 224 - 0.22uF +-5% 100V C712 229 - 2.2uF 50V C914 305- 479 - 4.7uF +-20% 50V C916 305-...

  • Page 29

    D701 11F - DIODE IN4148 D702 11F - DIODE IN4148 D704 47P - IN4004 D706 21P - PS156R D710 TIN COATED...

  • Page 30

    LOCATION 154V/C551 SPECIFICATION D721 TIN COATED D909 1T - 1A 600V IN4005 D910 21P - PS156R D911 31T - S.W DIODE BAV20 D912 31T - S.W DIODE BAV20 D913 11F - DIODE IN4148 D914 11F - DIODE IN4148 D925 3020- STPR320 D926 11F -...

  • Page 31

    J041 TIN COATED J042 TIN COATED J043 TIN COATED J044 TIN COATED J045 TIN COATED J046 TIN COATED...

  • Page 32

    LOCATION 154V/C551 SPECIFICATION J049 TIN COATED J050 TIN COATED J051 TIN COATED J052 TIN COATED J053 TIN COATED J054 TIN COATED J057 TIN COATED J058 TIN COATED J061 TIN COATED J063 TIN COATED J064 TIN COATED J065 TIN COATED J066 TIN COATED J067 TIN COATED...

  • Page 33

    J120 TIN COATED J121 TIN COATED J123 TIN COATED J125 TIN COATED...

  • Page 34

    LOCATION 154V/C551 SPECIFICATION J130 TIN COATED J132 TIN COATED J133 TIN COATED J134 TIN COATED J914 TIN COATED L101 339 - 3.3UH +-10% L402 TIN COATED L403 TIN COATED L406 TIN COATED L907 TIN COATED Q101 446- 2SC1213AC Q401 419- 2SC945P Q404 420-...

  • Page 35

    R165 602- 222 - 2.2K OHM +-5% 1/6W R166 602- 102 - 1K OHM +-5% 1/6W R170 TIN COATED R172 602- 101 - 100 OHM +-5% 1/6W R180 602- 362 - 3.6K OHM +-5% 1/6W...

  • Page 36

    LOCATION 154V/C551 SPECIFICATION R185 602- 102 - 1K OHM +-5% 1/6W R402 172- 222 - 2.2K OHM +-5% 1/4W R403 602- 101 - 100 OHM +-5% 1/6W R404 602- 101 - 100 OHM +-5% 1/6W R405 602- 102 - 1K OHM +-5% 1/6W R406 602- 101 -...

  • Page 37

    R709 602- 103 - 10K OHM +-5% 1/6W R710 602- 103 - 10K OHM +-5% 1/6W R711 602- 103 - 10K OHM +-5% 1/6W R712 602- 273 - 27K OHM +-5% 1/6W...

  • Page 38

    LOCATION 154V/C551 SPECIFICATION R713 602- 562 - 5.6K OHM +-5% 1/6W R715 602- 103 - 1K OHM +-5% 1/6W R720 172- 104 - 100K OHM +-5% 1/4W R721 175L- 102 - 1K OHM +-5% 1/2W R722 602- 332 - 3.3K OHM +-5% 1/6W R724 172- 105 -...

  • Page 39

    ZD420 522 - TZX20B ZD701 518 - TZX8V2A ZD902 55T - 0.5W ZD BZX55C30 ZD903 124 - ZD 18-2 ZD702 515 - TZX3V0C...

  • Page 40

    PARTS LIST OF CRT PC BOARD LOCATION CRPC556DQJ2 SPECIFICATION 581- 26 - LABEL 3503- CRT SOCKET 705A 556P R56 - IC802 ASS’Y C812 305- 102 - 1000UF +-20% 16V C835 103 - 0.01UF +80% -20% 2K Z5V C837 305- 470 - 47UF 160V IC801 539-...

  • Page 41

    D802 11F - DIODE IN4148 D803 11F - DIODE IN4148 D804 11F - DIODE IN4148 D805 11F - DIODE IN4148...

  • Page 42

    LOCATION CRP556DQJAI SPECIFICATION D806 11F - DIODE IN4148 D807 11F - DIODE IN4148 D808 19G - FAST RECOVERY DIODE D809 19G - FAST RECOVERY DIODE D810 19G - FAST RECOVERY DIODE D811 19G - FAST RECOVERY DIODE D812 19G - FAST RECOVERY DIODE D813 19G -...

  • Page 43

    R841 172- 102 - 1K OHM +-5% 1/4W R842 172- 102 - 1K OHM +-5% 1/4W R846 602- 393 - 39K OHM +-5% 1/6W R847 602- 393 - 39K OHM +-5% 1/6W R848 602- 393 - 39K OHM +-5% 1/6W R849 172- 105 -...

  • Page 44

    LOCATION CRP556DQJAI SPECIFICATION R850 172- 105 - 1MEG OHM +-5% 1/4W R851 172- 105 - 1MEG OHM +-5% 1/4W R855 175L- 560 - 56 OHM +-5% 1/2W R856 175L- 560 - 56 OHM +-5% 1/2W R857 175L- 560 - 56 OHM +-5% 1/2W R858 TIN COATED R860...

  • Page 45

    PARTS LIST OF Q403/Q406/D408 ASS'Y LOCATION PARTS No. SPECIFICATION NYLON WASHER 3028- MICA 354- HEAT SINK 1730- SCREW 1730- 10 - SCREW D408 220- FMP-2FUR 1500/600V 5A Q403 689- 2SC5297 Q406 415- TIP122 PARTS LIST OF AC LINET ASS'Y LOCATION PARTS No.

  • Page 46

    PARTS LIST OF CRT ALTERNATION LOCATION PARTS No. SPECIFICATION 750A 5910- 15“ CHUNGHWA CRT C418 210J- 432 - 0.0043uF +-5% 2000V C425 210J- 334 - 0.33 uF +-5% 400V C430 21 - FRD 1.5A 500V FR155 P404 8009- 3P PLUG R409 172- 204 -...

  • Page 47

    LOCATION PARTS No. SPECIFICATION 750A 5910- 3PS - CHUNGHWA CRT C418 210J- 472 - 0.0047uF +-5% 2000V C425 210J- 334 - 0.33uF +-5% 400V C430 21 - FRD 1.5A 500V FR155 P404 8009- 3P PLUG R409 172- 204 - 200K OHM 5% 1/4W R456 61A 153M- 271 -...

  • Page 50: Ic Block Diagrams

    10. IC BLOCK DIAGRAMS IC101 UM6862/WT6018 DEGAUSS V-I/P BRIGHT H-I/P CONTRAST RESET_ OSC0 OFF MODE IC802 LM2438T OSC1 H-OUT Vin 1 V-OUT Vin 2 Vin 3 WRITE PROTECT MUTE Vout 3 STAND BY/SUSPEND Vout 2 H.W DDC Vout 1 SENSE AUDIO KEY SELECT LED DETECT...

  • Page 51

    IC102 24C04 HV GENERATOR MEMORY EEPROM ARRAY CONTROL CONTROL (128X8) LOGIC LOGIC XDEC PAGE LATCHES YDEC SENSE AMP R.W CONTROL IC601 TDA9302H FLYBACK GENERATOR POWER AMPLITIER THERMAL PROTECTION IC901 3842 SET/ Vref Vref RESET U.V.L.O. INTERNAL LOGLC BIAS 1/2 Vref C.S.

  • Page 53

    IC801 LM1279N RED OSD IN GREEN OSD IN BLUE OSD IN CONTRAST 12dB DRIVE ATTENUATOR ATTENUATOR RED VIDEO IN RED OUT R CLAMP CAP RED DRIVE 1.35V CONTRAST 12dB DRIVE Vref ATTENUATOR ATTENUATOR VCC2 GREEN VIDEO IN GROUND GREEN OUT G CLAMP CAP GREEN DRIVE CONTRAST...

  • Page 56

    IC101 PIN40 P801 D814 C821 C820 93A64-19-52T CMPC-D556Q 715A684-XX 22UF 1SS83 5.04V H802 FB801 IC801 100V CRPC-D556Q R801 C810 R821 100V C811 C812 47UF 56A539-2 C813 R-BIAS 715A694-XX 1000UF R849 1/4W LM1279 0.22 VR803 FB802 1/4W R802 R111 IC101 PIN39 R-OSD G-OSD C841...

  • Page 57

    IC101 PIN40 CMPC-D556Q 715A684-XX 5.04V H802 R111 IC101 PIN39 R110 C163 4.8V C160 100P 100P 10us IC101 PIN33 R160 SENSE 4.98 CONT C103 4.4V R161 R119 C104 Q101 5.62 100UF 2SC1213 10us ZD11 R118 IC101 IC101 PIN32 C110 5.6V 56A1125-33-X NT68P61A R132 5.44V...

  • Page 58

    P801 FB803 SENSE 4.98 4.95 R421 R127 D411 Q101 1SS82 5.62 1/4W 2SC1213 R126 ZD110 R430 1/4W P802 5.6V 150K 1/4W R132 C162 240K R968 1000 1/4W C609 R610 R972 100V 120K VR902 R966 1/4W R967 R172 C961 0.68 1/4W R614 R609 0.01...

  • Page 59

    P801 C821 C820 22UF FB801 IC801 100V R801 C810 R821 100V C812 C811 47UF 56A539-2 C813 1000UF 1/4W LM1279 0.22 FB802 R802 R-OSD G-OSD IC802 7.79 LM2439 VCC1 B-OSD FB803 72.57 R803 R804 D801 C801 1N4148 2.43 10UF 2.98 SENSE C814 R818 R815...

  • Page 60

    D814 C821 C820 93A64-19-52T 22UF 1SS83 CRPC-D556Q IC801 100V 100V C812 56A539-2 R-BIAS 715A694-XX C813 R849 1000UF LM1279 0.22 VR803 1/4W C841 R-OSD G-OSD IC802 1000P C831 7.79 LM2439 500V R846 VCC1 B-OSD 72.57 100V 2.43 R852 2.98 R855 C814 R818 R815 11.75...

This manual also for:

C551, D556q, 154v

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