service manual - Linfotech.co.uk
Contents
1. OPVOC tar v Al DABIS DCVOL RI nm KM fir mo Lat Om oF OUT DM roview Electronics Taiwan LTD GF NO 1 Pau Sheng Rd Yung Ho City Taipei County Taiwan ROC Tet 8952223156750 Fax B8522222 4013 300 100 SH 770 Pe 1717 770 717 Update 2002 03 09 ow RIN CEST ATEJ Pi 200 100 SH770 22 06 3 Dana t hang Re Cha 2220 6700 0622212 4313 Ll E re 7 veo Casa hee aru 301 2 um 101250 roview Electronics Taiwan Co LTD EF 1 Pae Ssesg Rd Vengo Taipe County Taiwan R O C Tel 395 2 2231 8780 Fax MVP2IPOWERI 200 100 SH770 w SU BE Memu2. 875KHz 49 107KHz 31 778us 28 590us 26 413us 26 667us 31 777us 28 444us 21 333us 20 364us 25 422us 20 42lus 20 317us 20 317us 25 422us 22 222us 20 000us 16 000us 16 162us 15 127us C Sync width 3 813us 2 042us 1 270us 2 032us 3 813us 2 000us 3 200u 2 400us 1 616us D Back 1 589us 3 063us 3 810us 3 810us 1 907us 3 556us 1 280u 3 232us Porch E Front 0 9545 3 064us 1 016us 0 508us 0 635us 0 666us Porch 59 941Hz 66 625Hz 72 810Hz 75 000Hz 70 087Hz 56 250Hz 60 317Hz 72 188Hz 75 000Hz 75 087Hz 16 683ms 15 009ms 13 734ms 13 333ms 14 268ms 17 778ms 16 579ms 13 853ms 15 253ms 13 723ms 12 678ms 12 800ms 12 711 17 067ms 15 840ms 12 480ms C Sync width 0 064ms 0 086ms 0 079ms 0 080ms 0 064ms 0 057ms 0 106ms 0 125ms D Back 0 794ms 1 115ms 0 528ms 0 427ms 1 112ms 0 626ms 0 607ms 0 478ms Porch E Front 0 57205 0 085ms 0 449ms 0 026 0 38125 0 028 0 0265 0 77ms 0 021ms 0 122ms H V SYNC 2 182us 1 745us 1 1208 0 32305 1 3105 13 3335 13 318 12 800ms 12 70705 0 064ms 0 061ms 0 448ms 0 428ms Preset VESA VESA Modes oe 1024 768 1024X768 Rate as 000MHz 7 gt OH 78 750MHz 108 00162 135 00MHz FH z 60 023KHz 63 98KHz 79 976KHz 20 677us 17 70Tus 16 660us 15 630us 12 504us 15 754us 13 653us 13 003us 11 852us 9 481us C Sync width 2 092u
3. Pattern 1 Move the OSD to the LANGUAGE mode generator 2 You can choose one of the eight language you need G TROUBLE SHOOTING HINTS No Display Black Change adapter Push the power ON OFF switch LED Color change To Step 2 YES YES p Check main Check the CN1 Pin1 board U2 Pin2 of Inverter High Voltage Hi Lo under Make sure the push power connection of sw Inverter is fine Check F1 Fuse of inverter YES Check the connection of CN8 cable YES Change the main board Hi Lo under push power sw Change the main board Change the Inverter NO To Step 2 Step 2 Check the main NO Check F1 D5 board 12V YES NO Check U10 U11 TR1 YES Check the main 5 board 07 Pin 5 Check U7 YES H V input PS Change Signal 09 Check H V Signal NO Change Signal Cable YES No display White Check the main Check board 5 2 U10 U11 TR1 YES 08 013 YES Check the main Check board U9 Pin3 3 3V Circuit YES YES Change H V Input U9 Signal NO Check H V Signal NO Change Signal Cable YES H BLOCK DIAGRAM HI VOLTA
4. 0x480 PC or Pattern generator Crosshatch Pattern 31 5KHz 640x480 Saving Wattmeter Operation Plug power cable into the adapter check adapter power indicator light up green Make sure the voltage of the power plug 7 on the main PCB to the value shown at right Unplug the signal cable into the monitor Turn the power switch of the monitor ON Check monitor power indicator light up orange Make sure the wattmeter value shown at right OSD will be display NO SIGNAL Picture 1 Hold lt key then turn the power switch of the generator monitor OFF Crosshatch Pattern 2 Hold gt key then turn the power switch of the 31 5KHz 640x480 monitor ON 3 You can into factory adjustment mode PC or Pattern 1 Press and relese the MENU knob to activate the generator OSD menu Crosshatch Pattern 2 Move the OSD to the AUTO function press MENU 1024x768 60Hz key auto adjuat display mode to its utmost performance according to VGA setting 3 In the event of the display image needs further adjustment White PC or Pattern 1 Move the OSD to the COLOR mode AUTO COLOR Balance generator 2 set color is 9300 K using the OSD Check the value Adjust 0 White Pattern shown at right 1024x768 60Hz Y 22040 1FL 0 283 0 01 0 297 0 01 3 set color is 6500 K using the OSD Check the value shown at right 22040 1FL x 0 313 0 01 y 0 329 0 01 PC or
5. GE VSYNC HSYNC LCD PANEL LVDS VGA IN ADC SCARE 10 EVEN 12PIN 8 RO R7 ER O i 3 R G B 8 7 DDC SDA T DDC SC 8 BO B7 D DE D D C 24C21 pane CRYSTAL 10 ODD Se AM 2ac16 12M HZ EEPROM MCU INVERTER POWER SDA BLK ON OFF SCL Y BRIGHTNESS SWITCH POWER 8PIN 127 SUPPLY AND 3 AS lin REGULATOR 5v N N 12V N OEE 12M HZ ADAPTER 12V Te BLOCK DIAGRAM Document Number ORION ate Tuesday October 23 2001 Bheet of 1 SCHEMATIC DIAGRA e FCM 1603 309705 oom oom 4 oom earned vara vo VOA TSPIN DISHELL gt gt 2 und 741014 0227 Proview Electronics Taiwan LTD OF NO 1 Pau Sheng Rd Yung Ho Cry Taipei County Taiwan R O C Tel 886 2 2231 6789 Fax 586 2 2232 4513 MVP2 VGA 20010oshzrzo sx 1 7 to 7 E 0 mu AA RGRZRAp 27 5 me awer 4 5 a 3 SIE E 5 HA q E an Co L EF NO 1 Pau Ra Yung Ha Cy Courtty Tawan 888 2 2231 8780 38522224603 200 1005 4 En
6. MA782 Service Manual TABLE OF CONTENTS SERVICE 1 A IMPORTANT SAFETY INSTRUCTION 1 B SPECIELCATTONS 24 4220 wae SA 2 C TIMING CHART 2401 a A SAA ARA 3 CONTROL 5 CONDUCTION 6 F ADJUSTMENT 11 G TROUBLE SHOOTING HINTIS sss 12 H BLOCK 16 I SCHEMATIC DIAGRAM sss 17 WARNING To prevent from fire or shock hazard do not expose monitor to any rain or any form of water High voltage is inside the monitor so please do not remove the back cover of the cabinet if you are not a qualified monitor engineer Contact the local dealer or the nearest Proview branch office if you need help A IMPORTANT SAFETY INSTRUCTION Prior to using this service manual please ensure that you have carefully followed all the procedures outlined in the user s manual for this product 1 Read all of these instructions 2 Save these instructions 3 Follow all warnings and instructions a marked on the product 4 Unplug this product from the wall outlet before cleaning Do not use liquid cleaners or aerosol cleaners use a damp cloth for cleaning Do not use this product near water 6 not place this product on an unstable cart stand or tablle The product may f
7. all causing serious damage to the product 7 Slots and openings in the cabinet and the back or bottom are provided for ventilation to ensure reliable operation of the product and to protect it from overheating those openings must not be blocked or covered The openings should never be blocked by placing the product on bed sofa rug or other similar surface This product should not be placed in a built in installation less proper ventilation is provided 8 This products should be operated from the type of power source indicated on the marketin label If you are not sure of the type of power available consult your dealer or local power company 9 This product is equipped with a 3 wire grounding type plug a plug having a third grounding pin This plug will only fit into a grounding type power outlet This is a safety feature if you unable to insert the plug into the outlet contact your electrician to replace your obsolete outlet Do not defeat the purpose of the grounding type plug 10 Do not allow anything to rest on the power cord Do not locate this product where persons will walk on the cord 11 If an extension cord is used with this product make sure that the total of the ampere ratings on the product plugged into the extension cord to the waplugged into outlet does not exceed 15 ampere 12 Never push objects of any kind into this product through cabinet slots as they may touch dangerous voltage points or short out parts that could r
8. esult in a risk of fire or electric shock Never spill liquid of any kind on the product 13 Do not attempt to service this product yourself as opening or removing covers may expose you to dangerous voltage points or other risks Refer all servicing to service personnel 14 Unplug this product from the wall outlet and refer servicing to qualified service personnel under the following conditions a When the power cord or plug is damaged or frayed b If liquid has been spilled into the product c If the product has been exposed to rain or water d If the product does not operate normally when the operating instructions are followed Adjust only those controls that are covered by the operating instructions since improper adjustment of other controls may result in damage and will often require extension work by a qualified technician to restore the product to normal operation e If the product has been dropped or the cabinet has been damaged f If the product exhibits a distinct change in performance indicating a need for service B SPECIFICATIONS 1 Maximum Resolution Recommend Resolution 3 Synchronization Range Horizontal Vertical 4 Active Display Area 5 Dot Pitch 6 Support display colors 7 Contrast Ratio Typical 8 Luminance of White 9 Bandwidth 10 User Control 11 OSD Function N 12 View Angle CR 5 Horizontal Vertical 13 Power Source 14 Power Consumption 15 Connection Type 16 Input Signal Vide
9. o Sync 17 Color Temperature 18 Dimension WxHxD 19 Monitor Weight 20 Base Operation Tilt 21 Power Saving ON STAND BY OFF 22 Signal Connector Pin Assignment Pin No 23 Audio signal 1280 1024 75Hz 1280 1024 60Hz 30 81 KHz 56 75 Hz 337 9mm H x 270 3mm V 0 264 H x 0 264 V mm 16 7M color 450 1 260cd m 135MHz 4 Key Switch Brightness Conrast H Pos V Pos H Size Phase Color Select Auto Reset Language OSD Adjust Exit 70 Degrees 70 Degrees 90 264 Vac 60 50 Hz 48W 15 Pin D Type Analog R G B 0 7Vp p 75 Ohms TTL level positive or negative polarity Cool Warm 452mm x 465mm x 142mm 4 8Kg 0 15 degree lt 50W lt SW lt SW 1 Red 9 from PC for DDC 2 Green 10 Sync Ground 3 Blue 11 Ground 4 Ground 12 SDA For DDC 5 Self Test 13 Horizontal Sync 6 Red Ground 14 Vertical Sync 7 Green Ground 15 SCL For DDC 8 Blue Ground 3 5 stereo phone jack Input Sensitivity 200mV 2 5 2 5W 80 Speaker C TIMING CHART Period B Active C Sync Width Back Porch E Front porch Preset VGA VESA VESA Modes 6405480 640X480 nate 640X480 a a 800X600 200x600 200x600 Dorkas Rate Dot Rate 25 110 175MHz 340MHz 31 31 500MHz 28 322MHz 36 000 40 000 000MHz son 500MHz 000MHz 31 469KHz 34 978KHz 37 861KHz 37 500KHz 31 469KHz 35 156KHz 37 879KHz 48 077KHz 46
10. s 1 813us 1 219us 1 037us 1 067us 2 462us 1 920us 2 235us 2 296us 1 837us Porch E bront 0 369us 0 321us 0 203us 0 444us 0 119us Porch 60 004Hz 70 069Hz 75 029Hz 60 020Hz 75 025Hz 16 666ms 14 272ms 13 328ms 16 661ms 13 329ms 15 880ms 13 599ms 12 795ms 16 005ms 12 804ms 0 106ms 0 050ms 0 047ms 0 038ms D Back 0 600ms 0 513ms 0 466ms 0 594ms 0 475ms Porch 0 062ms 0 054ms 0 017ms 0 016ms 0 013ms H V SYNC D CONTROL LOCATION Font control panel HEHE Un E Power Button 2 LED Power Display Menu Button Select Button Auto Button E CONDUCTION VIEW MAIN BOARD 1440 0000 400 Com po nent Side MAIN BOARD Component Side MAIN BOARD Solid Side J 3X DE S 022 5 00 002 656 u Aiie F re I rn ma 84 aap u 7 lt 2 E HT eu T L De lt riar 3 d d mm mm 11 To a CHT P ES 5 440 6008 1440 u TE maus 2296 br ue ay Tan F ADJUSTMENT PROCEDURE Test Meter x Test Point Program Menu 0 B 2 Digital Voltmeter Check x Crosshatch Pattern 31 5KHz 64
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