STUDER REVOX C279 Serviceanleitung Seite 98

sr[-rrotER
REvox
c279 E
311
3.
FUt{CTIONAL DESCRIPTION
CoNTENTS
Page
3.
FUNCTIONAL
DESCRIPTION
E 3/1
3.1
POh'ER SUPPLY
1.775.300
E
3/1
3.?
DISPLAY
UNIT
1.775.310
E 3/2
3.3
INPUT
UNIT
1.775.330
E
3/3
3.4
MASTER
UNIT
1.775.340
E
311
3.5
MONIrORUNIT1.775.350
E3l5
+
l5v
0v
-l5v
3.1
PoLlER SUPPLY
1.775.300
Pnimary
cjrcuits:
Secondary
circuits:
one
poLe
of the
mains
voltage
is
connected
directLy to
The foLlowing vottages ane avaiLab[e:
the mains
transformer
[1].
The
other is
taken
via the
t15 V Amplifier
supply
mains
su,'itch
izl
(on
M0NIToR
UNIT) and
via the pnimary
+11
V
LED
supply
of the
DISPLAY UNIT
fuse F1 t3l to the tine
vottage
seLecton
[4] and the
+48
V
Microphone phantom
suppLy
tnans{onmen.
The
JolLouing
line
voltages
can
be
setected:
The anpti{jep supply
(+15
V) is stabiLized $ith
tHo
100
v,
120
V,
140
V,
200
v,
?2A
V,
and 2tO
U
tlo%,
senies-connected
reguLators
[5, 6].
The
output
vo[tage
oJ
50
to
60
Hz.
these
neguLatons
is
adjusted
ujth the trimmen potentio-
meters
RA1
(-'15
V)
and
RAZ
(+15 V).
The senies
pass
tnansiston
ol the
phantom suppLy
(+
48
V)
stabiLizes not
onLy
the vottage
but
aLso
sriitches
it
on
and off. The output
vottage
can be
adjusted uith
the
trimmen
potentiometer
RA3.
The poler of the indicator
LEDs
(+11V)
js {iLtened
onLy
by
an
electrotytic capacitor
and
is not
neguLated.