Bang & Olufsen BEOLAB 150, TYPE 1721 System Manual

Bang & Olufsen BEOLAB 150, TYPE 1721 System Manual Manual pdf 1 page image

BatU&0uberlBEOLAE150, TWE L721"L722, L723,1724,1725II{DHOLDDiagrammer ...:... . 4-48Halvlederoversigt. .. 4-50ElektriskstyHiste .. 4-52MekaniskstyHiste .. 4-54Justeringer ... 4-57Tekniskespecifikationer.. .. ...... 4-57Servicetips ... 4-58Isolationstest..... .. 4-614-48CONIENTSCircuit diagramsSemi-conductorsi....List of electricalparts .List of mechanicalparts .AdjustnentsTechnicalspecifications....Servicetips .. ....... 4-58Insulationtest .. .... 4-614-484-504-524-544-574-57DIAGMIT{FORTU$INGPi diagrammeter der angivettypenumrepi transi-storer og IC'er i de tilfelde hvor typenummereterentydrgtfor komponentersplaceringi kredslobet-f,eks.TR20/BC5578Hvis positionsnummereter efterfulgtaf en stjerneskal reservedelsnummeretbenyttes,da dennekomponenter specieltudvalgt- f.eks.TR1021KoordinatsptemDe stsrsteprintpladerer forsynetmed et koordinat-system.Komponenternepl disseprintpladerer pAdiagrammetforslmetmed en koordinatbetegnelse,som forteller i hvilket felt pi printpladende erplaceret(mindreskrifftype end positionsnummeret-f.eks.B3).kdningsfoftindels€rLedningsforbindelserpi diagrammeter samleti"bundter*.De enkelteledningerer forsynetmedkoder,der fortaller hvortil de gtr.INTERNFORBINDELSEPA EN DTAGMMSIDEE)(PIITNATION OF DIAGRAMType numbers of transistors and IC's have beenindicated on the diagram in those caseswhere thetype number is unambiguousfor the position of thecomponentin a circuitry - e.g.TR20/BC 5578.If the position number is followed by an asterisk thespare part number must be used becausethiscomponenthas been expecially"selected- e.g.TR102*.System of Co-ordinatesThe largest PC-boardshave been provided with a co-ordinate system. The components on these PC-boardsare provided with a grid reference on the diagramindicating in what gnd they are positioned on the PGboard (smaller typing than position numbers - e.g.B3).Wiring C.onnectionsThe wiring connections on the diagram areassembledin "bundles". The individual wires arecoded to indicate to where they are leading.INTERNALCONNECTIONON ONEDIAGMM PAGEInternal connections on a diagram page areindicated by a number. The bend of the wire indicatesin which direction the other end of the wire mav befound.l l r l1 2 2 0 n 1 n\ \ / /Interne forbindelser pi en diagramside angives medet tal. Knakket pl ledningen viser i hvilken retningden andenende af ledningenfindes.