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HP MV7540

SERVICE MANUAL

17'' CDT MONITOR
MV7540
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.
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Table of Contents

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  • Page 1: Service Manual

    HP MV7540 SERVICE MANUAL 17’’ CDT MONITOR MV7540 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...
  • Page 2: Table Of Contents

    HP MV7540 Table of Content Revision List. ……………………………………………………………………………………..…………… 1. Monitor Specifications..............………..…….……….. ……… Precaution And Notices..............…...……..…………….……….. Safety Precautions ..............……………………..….….…… Product Safety Notice ............…………………………..….. Service Notes ................………………………….……. High Voltage Warning .............…………………...……….…. Operating Instructions ...............……………...…………………….. Adjustment ...................……………….……………. Adjustment Conditions And Precautions......………………………………………… Main Adjustments ..............………………………………..
  • Page 3: Revision List

    HP MV7540 Revision List Version Date Revision History TPV Model Name Nov-06-2005 Initial Release S774BMAKCMO2 Feb-13-2006 Update BOM S774BMCLCPO2P Mar-06-2006 Update BOM S774BMCCCSO2...
  • Page 4: Monitor Specifications

    HP MV7540 1. Monitor Specifications CRT : 43.2CM(17") 90 Deflection, 29mm Neck, 0.27mm Dot Pitch, Pure Flat, 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, Moiré,...
  • Page 5 HP MV7540 11. Humidity: 20% to 80% Relative, Non-Condensing 12. External Connection: 15 Pin D-type Connector AC Power Cord 13. The rotation can’t be recall in user mode. 14. 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.
  • Page 6: Precaution And Notices

    HP MV7540 2. Precautions And Notices 2-1 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 7: High Voltage Warning

    HP MV7540 2-4 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.
  • Page 8: Operating Instructions

    HP MV7540 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 9: Adjustment

    HP MV7540 4. Adjustment 4-1 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.
  • Page 10 HP MV7540 H-SIZE H-MOIRE REDUCE H-CENTER V-MOIRE REDUCE V-SIZE MOIRE DISABLE V-CENTER NO USE PINCUSHION NO USE PARALLELOGRAM NO USE PIN-BALANCE V-LINEARITY TRAPEZOID V-LINEARITY ROTATION TOP CORNER NO USE BOT CORNER ABL ADJUST FREQUENCY SELECT CONTRAST MAX-HSIZE MODIFY BRIGHTNESS MAX-VSIZE MODIFY...
  • Page 11 HP MV7540 (d) Put the probe in the middle of screen, Brightness set to maximum. Contrast set to max. change to Raster pattern(No video)1024×768 @85Hz, set G-Bias 45,then adjust B-Bias , R-Bias and FBT screen VR, to make the color temperature x= 260 ±10, y= 290 ±...
  • Page 12 HP MV7540 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. Vertical red and blue lines are converged by varying the angle between the two tabs of the 4 pole magnets on the PCM assembly.
  • Page 13: Circuit Description

    HP MV7540 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...
  • Page 14: Transistor &diode Circuit

    HP MV7540 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...
  • Page 15: Trouble Shooting Chart

    HP MV7540 6.Trouble Shooting Chart 6-1 No Power Check the load first because it may be No raster, the indicator is caused by load short. not on. Check the load components as: IC901, Q911, Check the voltage across C907 is Q403, D922, D925, D919,D923.
  • Page 16: No Raster, No High Voltage, Indicator Is Orange

    HP MV7540 6-2. No Raster, No High Voltage, Indicator Is Orange (2)No signal is normal but it is orange when there is (1)Indicator is orange when there is signal input. no signal Abnormal Cut pin5 of IC101, then check if it is normal.
  • Page 17: No Raster, Indicator Is Green

    HP MV7540 6-3. No Raster, Indicator Is Green If the indicator of functional key is normal when there’s no signal. Check CPU control circuit 1. 5v power supply circuit 2. Rest circuit 3. oscillator C bus circuit. Connect with signal and check the voltage of G1 is between -25 and -65V.
  • Page 18 HP MV7540 Section1 Enter into factory mode to adjust brightness, contrast and look if the picture is normal. If it can be adjusted to normal picture and stored. Check if the voltage of filament is normal. Replace IC102 Check the voltage of G2 is Check power-saving circuit and 6.3Vpower supply...
  • Page 19 HP MV7540 Section2 Check if the voltage at base of Q403 is 0v Check if the voltage at pin29 of IC401 is 11.5V Check the voltage at pin26 of Cut pin29 and check if IC401 is normal when the voltage of circuit is H-frequency is 31KHZ.
  • Page 20: H-size Fails To Be Adjusted

    HP MV7540 6-4 H-Size Fails To Be Adjusted The picture is too large and H-size can’t be adjusted The picture is too small and H-size can’t be adjusted Cut the collector of Q406 and look if the picture becomes Check if the voltage of H-size control smaller, then check the voltage of circuit is half of B+.
  • Page 21: Mechanical Of Cabinet Front Dis-assembly

    HP MV7540 7.Mechanical Of Cabinet Front Dis-Assembly...
  • Page 22: Bom List

    HP MV7540 8.Parts List S774BMCCCSO2 Location Part Number Description Quantity Unit 001C 503504 47 SCREW FOR CRT 4.000 005C600604075S CRT WASHER 4.000 007C 7 7112 Compound Pallet 1.000 007C 7 7113 Compound Pallet 1.000 007C 7 7114 Compound Pallet 1.000...
  • Page 23 HP MV7540 0Q1C 340 16 47 SCREW 4.000 0Q1C1030 10128 SCRIW 1.000 705A 78A HP UN SPEAK ASS'Y 1.000 750A1697504JAG DEGAUSSING COIL 1.000 CMS774B2NHP CHASSIS FOR S774B-2HP 1.000 Q33C6183 A5 A 27 POWER KNOB 1.000 040C 58162435A MANUAL P/N LABEL 1.000...
  • Page 24 HP MV7540 C422 064C100J225 59 2.2UF +-5% 100V 1.000 C911 065C 1K101 5T6921 100PF/1KV Y5P+-10% 1.000 C919 065C 2M103 3B6921 0.01UF 2KV 20% Z5U 1.000 C964 065C305M1032BH 10NF,400VAC, Y2, M 1.000 C960 065C305M3322B2 3.3NF,400VAC, Y2, M 1.000 C961 065C305M3322BH Y2 3300PF +-20% 250VAC/400VAC 1.000...
  • Page 25 HP MV7540 D925 093C30408AT RG-4S 1.000 D922 093C30408AT RG-4S 1.000 A3-A4 095C 201 69032 WIRE 1.000 095C2070548 WIRE 1.000 095C2070586 WIVE HARNESS 1.000 H802 095C8013 14616 WIRE HARNESS 1.000 0B1C1040 12128 SCREW 1.000 0D1C1140 7128 SCREW 4X7(FOR AC) 2.000 0M1C1140 6128 SCREW 1.000...
  • Page 26 HP MV7540 084C 33 10 FUSE CLIP 2.000 087A 501 6 6425 RECEPTACLES 1.000 CN901 095C 800 2 2 WIRE 1.000 DF919 071C 55 2 A FERRITE BEAD 3*5*1.5 1.000 090C6118 1 HEAT SINK 1.000 D919 093C 6073A F R D 3A/400V 31DF4/I.R 1.000...
  • Page 27 HP MV7540 095C 90 23 JUMPER 1.000 095C 90 23 JUMPER 1.000 095C 90 23 JUMPER 1.000 095C 90 23 JUMPER 1.000 R417 095C 90 23 JUMPER 1.000 R444 095C 90 23 JUMPER 1.000 R448 095C 90 23 JUMPER 1.000...
  • Page 28 HP MV7540 J040 095C 90 23 JUMPER 1.000 J037 095C 90 23 JUMPER 1.000 J025 095C 90 23 JUMPER 1.000 J026 095C 90 23 JUMPER 1.000 J027 095C 90 23 JUMPER 1.000 J028 095C 90 23 JUMPER 1.000 J029 095C 90 23 JUMPER 1.000...
  • Page 29 HP MV7540 R434 061C 17239252T CFR 3.9K OHM +-5% 1/4W 1.000 R962 061C 17247052T CFR 47 OHM +-5% 1/4W 1.000 R951 061C 17247152T CFR 470OHM +-5% 1/4W 1.000 R486 061C 17247252T CFR 4.7K OHM +-5% 1/4W 1.000 R473 061C 17247252T CFR 4.7K OHM +-5% 1/4W...
  • Page 30 HP MV7540 R959 061C 60210352T CFR 10K OHM+-5% 1/6W 1.000 R953 061C 60210352T CFR 10K OHM+-5% 1/6W 1.000 R952 061C 60210352T CFR 10K OHM+-5% 1/6W 1.000 R933 061C 60210352T CFR 10K OHM+-5% 1/6W 1.000 R921 061C 60210352T CFR 10K OHM+-5% 1/6W 1.000...
  • Page 31 HP MV7540 R981 061C175L10152T CFR 100 OHM +-5% 1/2W 1.000 R721 061C175L10252T CFR 1K OHM +-5% 1/2W 1.000 R901 061C175L10552T CFR 1M OHM +-5% 1/2W 1.000 R606 061C175L12152T CFR 120 OHM +-5% 1/2W 1.000 R741 061C175L12452T CFR 120K OHM +-5% 1/2W 1.000...
  • Page 32 HP MV7540 D102 093C 64 1152T IN4148 1.000 D100 093C 64 1152T IN4148 1.000 FB401 093C1002 1F52T 1N5817 1.000 D405 093C1002 1F52T 1N5817 1.000 D103 093C1002 1W52T 1N5817 1.000 D101 093C1002 1W52T 1N5817 1.000 D740 093C1040 252T UF4004 1.000 D403...
  • Page 33 HP MV7540 C410 064C178J154 1T C121X 0.15UF 100V +-5% 1.000 C417 064C178J224 1T C121X 0.22UF 100V +-5% 1.000 C703 064C178J472 1T 4700PF 100V 1.000 C449 064C178J473 1T 0.047UF 1.000 C710 064C178J473 2T C121X 0.047UF 250V +-5% 1.000 C611 064C178J474 0T CL21X.
  • Page 34 HP MV7540 C743 067C 309100 7T 10UF +-20% 50V 1.000 C113 067C 309101 3T 100UF +-20% 16V 1.000 C104 067C 309101 3T 100UF +-20% 16V 1.000 C436 067C 309220 7T 22UF +-20% 50V 1.000 C115 067C 309330 3T 33UF +-20% 16V 1.000...
  • Page 35 HP MV7540 0M1C1730 7128 SCREW 1.000 006C 31 4 BRASS 3.000 715C 992 4HPQ 1.000 J802 095C 90 23 JUMPER 1.000 J803 095C 90 23 JUMPER 1.000 J804 095C 90 23 JUMPER 1.000 J807 095C 90 23 JUMPER 1.000 J810...
  • Page 36 HP MV7540 R801 061C 60275052T CFR 75 OHM+-5% 1/6W 1.000 R802 061C 60275052T CFR 75 OHM+-5% 1/6W 1.000 R803 061C 60275052T CFR 75 OHM+-5% 1/6W 1.000 R874 061C175L56052T CFR 56 OHM +-5% 1/2W 1.000 R872 061C175L56052T CFR 56 OHM +-5% 1/2W 1.000...
  • Page 37 HP MV7540 C824 065C 450104 3T 0.1UF 50V Y5V 1.000 C875 065C 4501047TV 0.1UF +80-20% 50V 1.000 C833 065C 4501047TV 0.1UF +80-20% 50V 1.000 C860 065C251K104 2T 0.1UF 250V 1.000 C858 065C251K104 2T 0.1UF 250V 1.000 C857 065C251K104 2T 0.1UF 250V 1.000...
  • Page 38: Block Diagram

    HP MV7540 9. Block Diagram...
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  • Page 40: Ic Block Diagrams

    HP MV7540 10. IC Block Diagram...
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  • Page 44: Pcb Layout

    HP MV7540 11. PCB Layout...
  • Page 45 HP MV7540...
  • Page 46: Schematic Diagram

    HP MV7540 12. SCHEMATIC DIAGRA...
  • Page 47 HP MV7540...
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