Studer J37 - Page 36

a-
The
followlng fuse holders wlth bullt-ln lndlcator lamps are
mounted
on lts front
panel:
S 10
=
0.4 Amp,
black Transformer T 867-I
(
primary
slde
)
S 1l
=
0.2 Amp, black
Rectlfier B 390 C 80
(AC
stde
)
S 12
=
1.25
Amp,
whtte Rectlfler B 30 C 1000
(AC
side)
(
heater
sync-playback amplifier
)
All
fuses
are
of the
"slo-blo"
type
and
have the dlmenslons
5
x
20
mm.
When replacing fuses
attentlon
must be
pa{d
on the fuse
holder
and
associated
cap:
Indicate colour before
removing,
HT-voltage
ls
provlded
by
a stabllizer
circult conslstlng of rectifier
B 390 C
80
and the tubes V
I,
V2
ard
V3
(
see
schematlc
7.837.618
).
Uslng
potentlometer
P lrthe HT-voltage may
be altered.
It has to be callbrated to a value of
+250
V.
DC-heatlng is
provided
for the tubes
V
I to
V8
(
rectifer
B 30 C 1000
).
The heater of the re-
malning tubes V9
to
V 12 are connected dlrectly to the transformer T 867-I.
Cautlon
!
In
recorders wlth
serial
nos.
5001 to 5030 the connectlor,
@
ts led to the
240
V tap of the
transformer T 870a
(
see schematic 7.837.001
).
This transformer
is situated ln the
power
supply
unit of the tape transport mechanlsm.
In
thls recorders
the
transformer
of the sync-playback
am-
pllfler
ls marked T 867 instead of T 867-I.