Bang & Olufsen BeoSound Century User manual

rt.
Bang&Olufsen
BeoSound
Century
Typ€2651, 2652,2654, 265/l
SERVICEMANUAL
CircuitDescription
3540178Danish
3540179
English
3540180German
3540181Fi€nch
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2
2-1
2-2
Adjusffnents
..................
Tuner..........
Tape............
cD
...............
Loudspeaker
Replacement
of PCB2Amplifier
Replacement
of PCB 3or31C4
Replacement
ofa
speakerunit..............
Repair
tips.............
Lubrication
Replacement
ofCDdrivemechanism
TapeWowfrequencies
Test
functions...................
Testmode...
Displayoftunervariant
Gearbox
test...........,..
Keyboardtest..............
LEDtest
Display
ofsoftwareversion
Presetting
of EEPROM
Continuousoperation
oftaperecorder
Speaker
sound
level
adjustment
[ffi;;;;;;;;;il;il::::::::
:::::::::::::::::::::::::::::::::::r::::::::::::::::
GB
5-1
5-1
5-1
5-3
5-4
5-4
5-5
5-5
DF
5-10 5-22
5-10 5-22
5-10 5-22
5-13 5-25
5-14 5-25
5-14 5-25
5-15 5-27
5-15 5-27
5-17 5-29
5-17 5-29
5-17 5-29
5-17 5-29
5-17 5-29
5-18 5-30
5-18 5-30
5-18 5-30
s-18 5-30
5-18 5-30
5-18 5-30
5-19 5-31
5-19 s-31
5-19 5-31
5-19 5-31
5-20 5-32
5-6
5-5
5-5
5-6
5-5
5-7
5-7
5-7
5-7
5-7
5-7
5-8
5-8
5-8
5-8
5-9
Disassembly
Glass
door... ...................;. 5-1
Front
fabrict,"r"..........:::::::::::::::::::::::::::::::::::::::::::::::.::::::.:::.::::::::::::::...........
6-l
Handle/PCB21Activeantenna 5-1
Rear
panel 6-2
CDfrontframe/PCB20
Doorsensor 5-3
Tape/Keyboard
frontframe.......... .. 5-4
Gearbox/PCB9Gearsensor 54
Sf
idingbracket
for
glass
door............ 6-4
Transformer 64
PCB1
-PCB
22 .........6-5
-6-7
Tape
mechanism.............. 5-8
Bang
&Olufsen
CONTENTS Surveyof modules 1-1
Specification
Guidelinesforservice
use............... 1-2
Wiring
oftransformer.......,......... .. 1-3
Brief
operation
guide 1-5
Diagrams etc. Explanation
ofdiagram
Wiring
diagram
Block
diagrams.................. 2-3
-2-8
Diagrams 2-9
-2-24
Listof electrical
parts ..........
List of mechanical parts
Adjustments and repair tips
Insulation test
-
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s
IBang
&Olufsen 1-1
SURVEYOFMODULES
IFM/AM decoder .....diagr. A
page 2-10
Amplifier Sound processing .......
diagr. I
page 2-19
Output Amplifier, left .............. ..diagr. J
page 2-20
Output Amplifier, right ............ .diagr. K
page 2-21
2 Door sensortransmit.... diagr. L
page 2-22
2 Amplifier power supply diagr. M
page 2-23
3 Microcomputer........... ;$:rr1;;
4 oisptay
&Keyboard ;"rJ:rrl;l
5 Power Supply & Motor Control diagr, M
page 2-23
6 rRReceiver................... ;.T:rr1;l
7 rape
dieital ;#:rr:;?
7 tape
analos ;#?:;;
7 Resetconverter ;$:T-r?
I
.f
Seenfrom thefront
r
I
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1-1
SURVEYOF
MODULES 1-1
8 cD servo diagr. E
page2-15
8 CDDecoder
.................... .............diagr.
F
page2-16
9 Gear-sensor
................... diagr. G
page 2-17
1oMains ;:i'1tl-ii
11 Re_deckelectronic ;$:T1?
12 Oscillator
................... diagr.
D
page 2-14
17 FM Frontend .
diagr. A
page 2-10
Seen
from theback
2O ooor Sensorreceive......... ..,...,,.,diagr, L
page 2-22
21 active FM Antenna diagr. I
page 2-19
22 Crossover
network, left ...,,.,,.,,.,, diagr. J
page 2-20
22 Crossover
network, right ......,..... diagr. K
page 2-21
1/17 8
Z
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1-2 1-2
SPECIFICATION
GUIDELINES
SPECIFICATION
GUIDELINESFOR
SERVICEUSE
BeoSound Century
rV ranfe Type2651
EU
FM-MW-LW
range Type
2652
cB, 2653 USA/CAN,2654JAp
Operation Direct,
easy-touch
pushbuttons
Optional
extra Beolink
1000,one-way
Cabinetfinish Black
Front
cover Grey-Red-Blue-Green,
type
6037
Acoustic system:
Active
speakers
Output
amplifier
SoundPressureLevel
Frequency
response
Cabinet
principle
Croosover
frequency
Active
crossovernetwork
Woofer
Tweeter
Net
volume
Tuner:
Tape recorder:
Compact
casette
PretuneJradio
programs 30FM
orAM
FMsection:
FMrange 87.5
-'t08.0
MHz
EU/GB
76.0
-
90.0MHz
JAP
FMaerialimpedance 75O
Sensitivity < 1,4;rV26dB
S/Nmono
Qulgtingsensitivity < 45prV
50dBS/Nstereo
Signal-to-noiseratio >66dBmono
> 63dBstereo
TotaiHarmonic
Distortion < 0,8%omono
< 1,0%o
stereo
Freqency
response 40
- I
5,000Hz +1.5
dB
Channel
separation >33dB lkHz
lmagerejection > 75dB
lFrejection >80dB
AM section:
AM range LW
150
-279kHzGB
MW
522
-
1610kHzGB
MW s20 tttOiiz USA/CAN
Antenna Loop
18.1prH
Sensitivity <4mV/m26dB
S/N156kHz
< 1.8mv/m26
dBS/N558kHz
Signal-to-noiseratio >47dB50mV/r gOitHt
TotalHarmonic
Distortion < 3% 50mV/mnoise
96ikHz
Selectivity59 >42dB 1494kHz
lmage
rejection >40dB270kHz
> 30dB 1494KHz
lFrejection >65dB270kHz
> 50dB558kHz
2x2outputamplifier
ClassG
95dBIECnoise/3m/stereo/room
75
-20,000
Hz+4
-8
dB
BassReflex
3500Hz
24dB/octaveLinkwitz/Ri
ley
10cm-4"
1.8
cm
-3/q"
1.'llitres
c46 - C120
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-2
INES 1-2
SPECIFICATION
GUIDELINES Bang
&Olufsen
fape transport Auto reverse
Tape
recording
system
Record
level
Noise
reduction
rape
swttcn
fape fread
Wow andflutter
Speeddeviation
Fast
forward
Frequency
range
sig;atto-noiseratio
Distortion
Channel
separation
Channel
unbalance
Erasure
Erasurefreqency
CDplayer:
Drsc
type:
Converter
system
Frequency
range
Signal-to-noise
ratio
Harmonic
distortion
Connections:
nuOio
Aux
Power
supply
Power
consumption
fotaiOimensionrW"|{*O
Weight
HXPRO
Auto Record
Level
NR
Auto ferro/chrome
oynattoy
iHarO
permalloy)
<
0.15%DtN
< +2o/o
< 120
sec.
C60
50
- 14,000
Hz
+3
dBchrome
> 53dBferro
t 62;B ferro
with noise
reduction
> 56
dBchrome
> 64dBchrome
with noisereduction
< 3ohD31315
Hz
>35dB1kHz
<2dB
>70dB
80kHz
12cm
(5")
and
8cm
(3")
Bitstrea
m
20
-20,000kHz
+0.5
dB/2 dB
>94dB
A-weighted
<O.025o/o
at 0dB/1kHz
Pint l.t.C.
Pin
2
Signal
ground
Pin
3
AF
in left
0.25-2VRM5
47kO
Pin4N.C.
Pin
5AFinright
O.25-2V
RMS
47kO
Pin
6N.C.
Pin7N.C.
230VAC
2651EU
240V
AC2652
GB
12OVAC
2653USA/CAN
toovnc 2654
JAP
Max.50watts
t wati in
stand-by
75x37
x17
cm
75
x33.5x 11
cmon
wallbracket
Optional accessories:
Beolink'1000
Carryinghandle/active
FM
antenna
nfVloop
antenna
Wallbracket
Subj-ct to change without notice
12kg
Type
1501,1502
ltaly
Type
2036
8720043
Type
2OaS
r--
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Bang
&0lufsen wtRtNG
or
r*o*rrJ*tf,
WIRINGOFTRANSFORMER
Type2551
EU230V-
PCB10,Mains
ffifr
ffiX
ffiil
ffiX
ffiil
ffiil
ffiil
.1 \
Qve,rN
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1-3
WIRINGOF
TRANSFORMER 1-3
ffim
ffiil
ffiil
ffiX
reil
Jl 1
II
Type 2552
GB24OV-
PCB
10,Mains
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1-4 1-4
WIRING
OFTRANSFORMER
Type
2553
cDN,
USA120V-
PCB10,Mains
ffiil
ffiil
-/_.-
"'I
g 3\
,\
l
QvnrNS
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Bang
&Olufsen 1-5
BRIEF
OPERATION
GUIDE 1-! BRIEF
BRIEF
OPERATIONGUIDE
BeoSound
Centuryis
primarily
designedfor closeupoperation.
Onlythe
relevant
buttonslightup.UseBeolink'l000for remote
control
(see
User's
guide).
RADIO:
Turnon
the radio
Changedisplayindication
(display
=frequency)
TuneintoandstoreallFM
radio
stationsin
thearea
Searches
up/down
the
frequencies
for anaccep-
tablesignal
Key
infrequency
(ex.
87.5MHz)
Storethestationon avacant
program
number
(0-30)
Storethestation
to a pro-
gram
number
(0-30)
Erase
thestationfrom pro-
gram
no.
Switching
betweenFM/AM
(not
alltypes)
Browse
throughprogram
numbers
Keyinexact
program
number
Select
anothersource
Switch
to stand-by
N EE.E
Z"nffiflNe
2sec. EE.E
EE.E
E
1.5
P]D
EE.E
1
]D
COMPACTDISC:
Raise
theCD-clamp
Lower
the CD-clamp
Start
playing
theCD
(Display
=trackno.)
Browse
throughtracks
Selecttracknumber
(ex.
5)
Pause
theCD
player
Resume
playing
afterstop,
orchange
displayindication
(display=tracktime)
Changedisplayindication
(display
=remaining
time)
Random
play
status
(display
indication
is
blinking)
Random
play
on/off
(display
indicationrotates
whenrandom
play
is
on)
Select
anothersource
Switchto stand-by
.,{,
1-''il'l'0
$ltu ' DrspLAy:
\'//' \ p
\F
E
P
P
AUXITLARY
SOURCE:
Openauxilayinput
(start
nowauxilarysource)
Switch
to stand-by
ACTIVE
ANTENNA
OPTION:
Selectactiveantenna
option
Cutout activeantennaoption D
SOUNDADJUSTMENTS:
Raises/lovers
the levels
Volumelevel
Storeallsoundlevels
Loudspeaker
balance
Basslevel
Treblelevel
Loudness
REMOTE
CONTROL:
(No
lightinbuttons)
Disable
the remote
control
function
Regain
the remotecontrolfunction D
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t-5
GUIDE 1-5
BRIEFOPERATIONGUIDE
DISPLAY: TAPERECORDER:
Start
playing
thetape
Playthe otherside
(turn)
Playfrom
thebeginning
Browsethroughtracks
Pause
thetaperecorder
Fastforwards/rewinds
thetape
Erasetape(no source)
Resume
playing
afterstop
Noisereduction
status
Noisereductionon/off
(display
indicationblinks
when noisereductionis
off)
Selectanothersource
Recording
pause
mode
(display
blinksalternately)
Auto reversestatus
Auto reverseonlofl
(display
indicationblinks
when auto reverseis
off)
Start
recording
track
4 (ex.)
onCD
(only
if CD is
selected
assource)
Stoprecording
pause
mode
Startrecording
Pausethe recording
Stoprecordingcompletely
Returnto approx.recor-
dingstart
Resumerecording
after
pause
Selectanothersource
Switch
to stand-by
DISPLAY:
Dnn
-
nnn
NDD
I
I
nPl
DEE
DEE
DJl
nr-
NT
rEt
--l
--l
\
rPr
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f
I
tl
t.\1
IE
lE
tl
ll
.,9
cNU
a
1n
1D
EE
D
D
Lnud
rPr
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Bang
&Olufsen 2-2
WIRING
DIAGRAM 2-2
WIRIN(
WIRING
DIAGRAM
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9lt/2
3 ricttttit\,tP
7 DISPTAY
+ (EVBI]ARI
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2-2
IAGRAM 2-2
WIRINGDIAGRAM 2-2
(J
CD
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IVEi-
3,tct?o:rir4PJlfrr
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2-3 2-3
BLOCKDIAGRAM 2-i BLOC
BLOCKDIAGRAM FORPOWERSUPPLY
TR3
Z
TX7888
F
JBj?- , , ;-!
rP32 r-t5vA
5VA
P2-2
230V!
I/A] NS
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2-3
)CKDIAGRAM 2-3
BLOCKDIAGRAM Bang
&Olufse
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Bang
&0lufsen 2-4
BLOCKDIAGRAM 2-
BLO
BLOCKDIAGRAM FOR
SYSTEMCONTROL
RAq<
TRFBI F
TDtrRI tr
toon
opEt,rcrosto
CD ON,/OFF
rurrR 0N/lII
IAPE ON,/OFF
SYS. ON/OFF
TAPEoSC. &5/8.41
MOTORON/OFF
DOOR
CLOSE
CLAMPER
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OPEN,/CLOSt
TAPE ON/OFF Cu^'lZOf
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SCL
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DATA
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COI,JNTER
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STOPSIG.
KEYBOARDDATA
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LEDCLOCK
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-4
RAM 2-4 BLOCKDIAGRAM 2-4
4--> srs. onzorr
[-JJ TAPE oSC
. 8. 5/8 .47
MOTOR
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DOORCLOSE
CLAI.4PERON,/OFF
OPEN/ CLOSE
TAPE ON/OFF
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tr DIAGRAI'4 X BLOCKDIAGRAM FORTUNER
FM TUN
VOLTAGF
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705
LC128
TUN]NGCONTROL
(PLL)
LOOP FILTER
[ = oracnau
x
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2-5 2-5
BLOCK
DIAGRAM 2-
BLO(
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p.
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BLOCKDIAGRAM FOR
TAPEANALOG
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2-5
DIAGRAM 2-5
BLOCK
DIAGRAM Bang
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REC,/P,
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iang
&0lufsen 2-6
BLOCKDIAGRAM 2-6
BLOCK
DIAGR
LOCKDIAGRAM FORTAPEDIGITAL
I]OWER
DO14N
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SF
REG
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