Microvitec Series 3 Colour Displays Monitors Service Manual

MICROVITECSERVICE MANUALSERIES—3COLOUR DISPLAY MONITORSGP0019AA2 

MICROVITEC SERVICE MANUALINTRODUCTIONThe contents of this manual are divided into several sections.W e will now look in some detail at the sections and explain how they are to be used to their best advantage.Factory Pre-set Adjustments:Some of these adjustments are very critical, not only from  an operational point but also from  a safety point. Themanufacturer recommends that you read and understand the section fully before making any adjustm ents.All pre-set adjustments are included in this section....

Fault Isolation and Repair Procedure:Configured in a boxed flow chart format, it represents repetitive faults encountered by our own Service Technicians.Each fault is accompanied by a series of boxes which will ask you to check a particular part of the equipment. After youhave carried out the check a question is asked (refer to Fig. 1).From the result of the question you can then answer YES or NO.If the answer is NO (as in this case) you must move onto the next box and carry out the next check.If the...

TECHNICAL SPECIFICATIONSMODELS - 1431/14321 : 625 lines, 50 fields interlacedor 31 2/313 lines, 50 fields non interlacedSYSTEM2 ; 525 lines, 60 fields interlacedor 262, 263 lines. 60 fields non-interlacedother non-standard systems may be suitableconsult MICROVITEC PLC.SUPPLYNominal 180 - 265V, 40 to 64HzTIMEBASE (LINE)Pull-in range 15 to 16KHzFRAME FREQUENCY50Hz - Pull-in range 45 to 65HzPOSITIONAL ERROR+ or -3%CONVERGENCE ERROR0.6m m screen center1.6m m screen edgeEHT24KV approximatelyEHT REGULATION+ or...

MODEL 2030NOTE: As models 1431 and 1432, with the following exceptions:CONVERGENCE ERROR (MAX)0.4m m screen center1.8m m screen edgeRESOLUTION505(H)x585(V) elements, 80 characters on 6 dot, wide matrixDOT PITCH0.8mmCRTRectangular 480mm  (screen diagonal) 90 deg deflectionprecision in-line gun vertical stripe screen high voltage focus4.POW ER CONSUMPTION80 Watts approximatelyMODEL 2040NOTE: As models 1431 and 1432. with the following exceptions:RESOLUTION940(H)x705(V)DOT PITCH0.47mmPOSITIONAL ERROR+ or...

ELECTRICAL SUPPLYW arningTHIS APPARATUS MUST BE EARTHED.ImportantThe wires in the mains lead are coloured in accordance with the following code:GREEN AND YELLOW EARTHBLUENEUTRALBROW NLIVEAs the colours of the wires in the mains lead may not correspond with the coloured markings identifying theterminals in your plug, proceed as follows:1.      EarthThe wire coloured GREEN and YELLOW must be connected to the term inal marked E or by the safety earthsymbol or coloured GREEN, or GREEN and YELLOW .2....

OPERATING SAFETYW e recommend — after effecting any Service and/or replacement of any part of the monitor, or after any repair work— that the SAFETY CHECKS listed following are carried out.NoteEnsure on re-assembly that ALL earth connections are replaced SECURELY; in particular safety earths andthe P band and dag earth CRT earth connections.Important!Failure to observe the points noted could affect your own safety, the products safety and ultimately, that theuser.SAFETY CHECKSEarth Continuity Checka)...

SAFETY STANDARDSSAFETY AND ISOLATIONUNDER NO CIRCUMSTANCES SHOULD ANY FORM OF REPAIR OR MAINTENANCE BE ATTEMPTED BYANY PERSON OTHER THAN A QUALIFIED ENGINEER.Switched Mode Power SupplyAlthough the outputs from  the power  supply are isolated from  the incoming mains supply, the bridge rectifier andthe ontrol and regulation circuit ARE NOT isolated. Therefore, when servicing the power supply section of thechassis assembly, the SMPSU should be supplied by a MAINS ISOLATION TRANSFORMER OF AT LEAST300VA...

______________PRESET CONTROL ADJUSTMENT______________GENERALPreset controls are initially set up at the factory and normally do not require adjustment unless a change is required inthe input configuration — for example, typically to install a different graphics adaptor card in the associated hostsystem. Details of the preset controls with their use and adjustment is described following:PRESET ADJUSTMENTSTO PROTECT AGAINST ELECTRICAL SHOCK HAZARD AND TO PROTECT THE MONITOR AGAINST SHORTCIRCUIT AND DAMAGE...

PRESETWRONG   XRIGHT /LINE FREQUENCYFIELD FREQUENCYHEIGHTWIDTHLINE PHASE*FIELD LINEARITY*(VERTICALLINEARITY)EAST/WEST*CORRECTIONFIELD SHIFTTABLE OF PRESET ADJUSTMENTS