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Tovis MTG-2907TN, Руководство по эксплуатации и обслуживанию

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Tovis MTG-2907TN Скачать руководство пользователя страница 9

9 

 

 

 

TROUBLE SHOOTING CHART

 

 

NO RASTER

 

 

CONTRAST

 

 

BRIGHTNESS

 

 

 

BRIGHTNESS 

CHECK 

G1 VOLTAGE 

CHECK &   

REPLACEMENT 

Q411, D414

 

NO 

NO

 

CHECK &   

REPLACEMENT 

R126, IC101

CHECK C115 

VOLTAGE 

YES 

CHECK &   

REPLACEMENT 

SG201~204 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

Содержание MTG-2907TN

Страница 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 ...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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 ...

Страница 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 ...

Страница 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 ...

Страница 10: ...10 SERVICE NOTICS ...

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