Bang Olufsen Beomaster 4500 Service Manual

Page 2

Bang &Olufsen 1 -1

F Modules 1 AM (LW/MW) ................................................. diagglzl
page -
1 AM (MW) ...................................................... diagr.
page 2-1
2 FM .......................................................... diagr. A
page 2-2
3 Amplifier& Power Supply .................................... diagr. B, C
page 2-3, 2-4
4 Microcomputer ............................................... diagr. D
page 2-5
5 IR Receiver .................................................. diagr. D
page 2-5
F 6 Operation panel .............................................. diagr. D
page 2-6
7 Socket Panel ................................................. dlagr. B
page 2-3
8 Riaa Amplifier ................................................ diagr. B
page 2-3
9 Transformer PCB ............................................. diagr. c
page 2-4
17 Tuner .......................................................... diagr.
page 2-1
,R

Page 9

1-8

STELSYMBOLER

Der anvendes 3 forskellige stelsymboler i apparatet.

J- : Stel

l = Signalstel

L7 = Chassis

MALEBETINGELSER

Alle DC-spzendinger er malt i forhold til stel med et
voltmeter med en indgangsmodstand p35 10 Mohm.

DC-spaendingerne er opgivet i volt (V), f.eks. 0.7 V.

SYMBOL FOR SIKKERHEDSKOMPONENTER

A

Ved udskiftning af komponenter med dette symbol
ska] der anvendes komponenter med samme reser-
vedelsnummer. Den nye komponent skal monteres
pa samme made som den udskiftede.

Bang &Olufsen

GROUND SYMBOLS
Three different ground symbols are used in the set.

.l. = Ground

l 2 Signal ground
in = Chassis
MEASURING CONDITIONS

All DC voltages have been measured in relation to
ground with a voltmeter with an input resistance of
10 Mohms.

The DC voltages are stated in volts (V), e.g. 0.7V.

SYMBOL OF SAFETY COMPONENTS

A J
When replacing components with this symbol,
components with identical part numbers must be

used. The new component must be mounted in the
same way as the one replaced.

LITHIUMBATTERl - EKSPLOSIONSFARE
UDSKIFYNING MA KUN Fonzuess AF EN sacxvumc.
06 50M azsxnzvgv 4 SEfiVICE MANUAL

WARNING'V

LITHIUM BAT IERY A RISK OF EXPLOSION
10 BE nepuczn av gunmen ssavmsmm oNLv _J
AND AS nzscmaso m m: sznvxcs MANUAL

ADVARSEL

Kortslutning 0g overopladning af visse typer
lithium-batterier kan medfare en voldsom eksplo-
sion,

Ved udskiftning af lithium-batteriet i dette apparat
skal falgende iagttages:

Der ska] anvendes batteri at samme fabrikat og
type som angivet i denne service manual
(se side 3-5).

Batteriet skal monteres nojagtigt som det originale
batteri.

WARNING

Short-circuit and overcharging of some types of
lithium batteries may result in a violent explosion.

When replacing the lithium battery in this set note
the following:

Use only batteries of the same make and type as
mentioned in this service manual (see page 3-5),

Place the battery exactly like the old one.