Bang & Olufsen BEOLAB 150, TYPE 1721 System Manual

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BEOLAE 150, TWE L721" L722, L723,1724,1725
II{DHOLD
Diagrammer ...:... . 4-48
Halvlederoversigt . .. 4-50
Elektrisk styHiste
.. 4-52
Mekanisk styHiste .. 4-54
Justeringer
... 4-57
Tekniske specifikationer .. .. ...... 4-57
Servicetips
... 4-58
Isolationstest ..... .. 4-61
4-48
CONIENTS
Circuit diagrams
Semi-conductorsi
....
List of electrical parts .
List of mechanical parts .
Adjustnents
Technical specifications ....
Service tips .. ....... 4-58
Insulation test ..
.... 4-61
4-48
4-50
4-52
4-54
4-57
4-57
DIAGMIT{FORTU$ING
Pi diagrammet er der angivet typenumre pi transi-
storer og IC'er i de tilfelde hvor typenummeret er
entydrgt for komponenters placering i kredslobet -
f,eks. TR20/BC 5578
Hvis positionsnummeret er efterfulgt af en stjerne
skal reservedelsnummeret benyttes, da denne
komponent er specielt udvalgt - f.eks. TR1021
Koordinatsptem
De stsrste printplader er forsynet med et koordinat-
system. Komponenterne pl disse printplader er pA
diagrammet forslmet med en koordinatbetegnelse,
som forteller i hvilket felt pi printpladen de er
placeret (mindre skrifftype end positionsnummeret -
f.eks. B3).
kdningsfoftindels€r
Ledningsforbindelser pi diagrammet er samlet i
"bundter*. De enkelte ledninger er forsynet med
koder, der fortaller hvortil de gtr.
INTERN FORBINDELSE
PA EN DTAGMMSIDE
E)(PIITNATION OF DIAGRAM
Type numbers of transistors and IC's have been
indicated on the diagram in those cases where the
type number is unambiguous for the position of the
component in a circuitry - e.g. TR20/BC 5578.
If the position number is followed by an asterisk the
spare part number must be used because this
component has been expecially"selected - e.g.
TR102*.
System of Co-ordinates
The largest PC-boards have been provided with a co-
ordinate system. The components on these PC-boards
are provided with a grid reference on the diagram
indicating in what gnd they are positioned on the PG
board (smaller typing than position numbers - e.g.
B3).
Wiring C.onnections
The wiring connections on the diagram are
assembled in "bundles". The individual wires are
coded to indicate to where they are leading.
INTERNAL CONNECTION
ON ONE DIAGMM PAGE
Internal connections on a diagram page are
indicated by a number. The bend of the wire indicates
in which direction the other end of the wire mav be
found.
l l r l
1 2 2 0 n 1 n
\ \ / /
Interne forbindelser pi en diagramside angives med
et tal. Knakket pl ledningen viser i hvilken retning
den anden ende af ledningen findes.