Tovis MTG-2907TN Service And Operation Manual Download Page 1

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MTG-2907TN Publication A. Issue 1

SERVICE AND OPERATION MANUAL

MTG-2907TN : 29INCH, FST

Information in this publication current as of Jun, 2003.

Information subject to change as display technology advance.

This publication produced by TOVIS Engineering Division.

This monitor has been designed and manufactured to deliver high performance video. For continued peak Performance
use safe operation, only high quality TOVIS replacement parts or their exact specified Equivalent When servicing.

MTG- 2907TN

OPEN FRAME VGA COLOR MONITORS

Summary of Contents for MTG-2907TN

Page 1: ...to change as display technology advance This publication produced by TOVIS Engineering Division This monitor has been designed and manufactured to deliver high performance video For continued peak Performance use safe operation only high quality TOVIS replacement parts or their exact specified Equivalent When servicing MTG 2907TN OPEN FRAME VGA COLOR MONITORS ...

Page 2: ...mission NEVER attempt to modify these circuits 2 Periodically check the high voltage with a reliably calibrated meter for values not in excess of Manufacturer s recommendations See high voltage Shut down Circuit page 4 for further details CRT Warning All picture tubes used in TOVIS monitors are equipped with an integral implosion protection system The picture Tube is however a highly evacuated com...

Page 3: ...ng lugs 9 Magnetic Shielding Internal 10 X Radiation 0 50mR hr Maximum 11 Mis convergence Center 0 40mm Maximum Corners 2 0mm Maximum 12 Non Linearity Using a vertical and horizontal symmetrical cross hatch pattern to equation for non linearity will be Non linearity largest grid minus the smallest grid Divided by largest grid plus the smallest grid times 100 10 maximum 13 Temperature Operating 0 4...

Page 4: ...tation Sub Bright H V Adjustment Focus and Screen OSD Controls User s control A BRIGHTNESS ADJUSTMENT 1 Press the MODE key then Main Menu OSD come out as below Figure 2 Search CONTRAST sub menu using UP DOWN key on the Main Menu OSD 3 Select the CONTRAST by pressing SEL key Then the CONTRAST Sub Menu OSD comes out as below figure 4 Adjust Contrast as much as you want using UP DOWN key 5 After fini...

Page 5: ... first stage without any user s adjustment The monitor set upped by factory adjustment value Factory control On Screen Display This monitor has two adjustment mode One is for user s own adjust and other is for factory adjustment only But sometimes it needs to adjust at factory adjustment mode for repair or development person Adjustment at the factory adjustment mode needs more careful compare to u...

Page 6: ...or BIAS Select CB by pressing SEL key and then adjusts as same way as item 4 5 6 7 and 8 11 If you want to adjust other mode CGA EGA Don t adjust CB Have to adjust CONTRAST and BRIGHTNESS 12 If you want to finish factory adjustment Select RECALL as item B Exit and save GAIN MODE BIAS MODE high beam low beam fixed SB fixed CB OSD MODE Fixed HIGH VOLTAGE SHUT DOWN CIRCUIT The chassis of this monitor...

Page 7: ...920 S Corection H V Pro KB2147 Ver Out TDA8172 FBT SMPS KA3842 2SK2676 170V 32V 15V 15V 6 3V 5V Doubler STR83145 AC Input Video Output Video Pre AMP KA2500 OSD KS2508 BIAS Video In G1 G2 G4 Deflection B Control B MCU KS88P6116 EEPROM 24C04 Sync In Control H V Out 2SC4770 High Voltage G4 G2 B Hor BLK ABL ...

Page 8: ...ECK Q802 D WAVEFORM YES NO CHECK REPLACEMENT BD801 IC801 NO CHECK REPLACEMENT IC802 CHECK SIGNAL CABLE CHECK REPLACEMENT SIGNAL CABLE NO YES NO VIDEO CHECK IC201 21 24 26 PULSE CHECK IC201 23 DC LEVEL 18 19 PULSE NO NO CHECK REPLACEMENT IC101 Q103 YES CHECK C206 C210 C217 PULSE CHECK REPLACEMENT Q201 Q214 NO CHECK REPLACEMENT CRT SOCKET AND G1 CIRCUIT YES CHECK REPLACEMENT IC201 YES ...

Page 9: ...G201 204 VOLTAGE CONTRAST CHECK IC201 12 VOLTAGE CHECK REPLACEMENT IC201 R903 ZD901 NO NO CHECK REPLACEMENT IC101 CHECK IC201 18 WAVEFORM YES CHECK REPLACEMENT IC101 YES NO RASTER YES CHECK REPLACEMENT Q425 Q407 CHECK H V G2 CHECK Q425 WAVEFORM CHECK G1 DC 170V CHECK BD404 DC 170V CHECK REPLACEMENT BD404 R854 CHECK REPLACEMENT G1 CIRCUIT NO YES NO NO NO CHECK REPLACEMENT FBT CRT YES YES ...

Page 10: ...10 SERVICE NOTICS ...

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