Microvitec Series 3 Colour Displays Monitors Service Manual

							_________LIST OF COMPONENTS - PROM INTERFACE PANEL____________GENERAL1.       Components used in the Prom Interface Panel Assemblies, together with possible component variationsare listed following;2.        Details of possible circuit variations, used with different versions of the panel, are shown in theaccompanying Prom  Interface Circuit  Diagram.RESISTORS1.      Most of the resistors employed in the construction are standardcarbon film types of 0.25 watt rating.±5% tolerance.LIST OF COMPONENTS - PROM INTERFACEComponent ReferencePart No.Component  DescriptionRESISTORSR1RF683DJORESISTOR C/F 6K8 0.25W  5%R2RF391GJORESISTOR C/F 39R 0.5WR3,6,11,14,20,21,22,23,24,25,26R4,7,10,12RF222DJO RF472DJORESISTOR C/F 220R 0.25W  5% RESISTOR C/F 470R0.25W  5%R15,18RF103DJORESISTOR C/F 470R 0.25W  5%R5,8,13RF103DJORESISTOR C/F 1K0 0.25W  5%R16RF683DJORESISTOR C/F 1K0 0.25W  5%R9,17RF102DJORESISTOR C/F 100R 0.25W  5%R19RESISTOR C/F 2K2 0.25W  5%NOTE FOR APPLE MONITORS ONLY; - RESISTOR C/F R9,R17 BECOMES 220R 0.25W 5%CAPACITORSC1CA2268M6CAPACITOR ALUM/ELEC 2.2UF 63VC2,3CM105ML6CAPACITOR MET/P 0.1 UF 160VC4,5,6CK151JKOCAPACITOR CER/T 15PF 50VDIODES, TRANSISTORS, INTEGRATED CIRCUITSTR1QS0337UTOTRANSISTOR BC337-5IC1IV7805LXOCIRCUIT INT. 78L05IC2IR18030AX2PROM TBP 18SA030N (PROGRAMMED INDIVIDUALLYFOR SPECIFIC MODEL)D1,2-5DS4148UTODIODE IN4148 THOMPSONCONNECTORSPL1,3KP0026A10PLUG 10 PIN 20/3450 PRESPL2KP0025A05PLUG 5 W AY 20/3445INDUCTORSL1,2,3LW 104SK2CHOKE 10 UH 
						

							6.      Sync Signals(1)    Sync signals are not required by the PROM circuitry and are passed directly through the interfacepanel.7.       R.F.I. Filtering(1)      On models requiring R.F.I. filtering, L/C networks formed by L1/C4, L2/C5 and L3/C6 are fitted onR. G & B outputs. 
						

							AMENDMENTSAFFECTSAll  metal  cabinet  monitors.DESCRIPTIONModifications to bring cabinet back vvire routing, dressing and securing in line with current production practice.IMPLEMENTATIONThesemodifications only apply whenever a monitor is returned for service.MODIFICATIONSW ith the cabinet top removed check the following:Signal Wires On Cabinet Back Components(DIN sockets. BNC sockets, mode switches, brightness/contrast controls etc).a)       It is now the practice to fit a tyrap fastener onto the signal wires on each component. (See diagrams).A tyrap should be fitted to any component which is found not to have one.Note: The signal wires are already mechanically twisted onto each pin and then soldered : thismodification provides  additional  wire attachment.b)       If it is possible to move any of these signal wires away from its normal position to touch the smallexposed section of the terminals on the main switch then sufficient tyraps should be fitted to thesewires to hold them  in position.Note: This does not apply to wires which are already contained within a secondary sleeve. SingleInsulated Mains W ires On Mains SwitchThis  only applies to the short sections of mains cable from  which the outer sheath has been removed to allow theindividual wires to be attached and soldered to the mains switch.If it is possible to move any of these short sections of wire away from its norm al position to touch a pin on one of thecabinet back components then sufficient tyraps should be fitted to the mains wires to hold them in position. (Seediagram).