Marantz SUPERSCOPE CD-320 - 5 B-8 Recording Current Adjustment (Temporal); 5 B-9 Recording Bias Current Adjustment (Temporal)

cD-320
v
r'
5B-8 Recordins
Currênr Adiustmcnr
(Tsmpoi.t)
SET UP
.
50/60 Hz AC volrâgÊ
rared
tor
the unrr
ro oe
used in
â market
country.
.
DC6V
2.
Inpur signal:
I kHz,
60dBsignal
3.
TAPE selector
swrlch
posrt,ons.
NORMA_
4.
Loadi Nlearufing
instrument
input imp€dance
PBOCEDURES
1. Stop
lhe .€cording
bias
current
osci ation
by
drsconnecring
the biâs circuit
+B
resistor
{R314).
2. Disconnecr
the recording
head shietding
,eaos
(sroùnding
leads)
âr J302
{L
channet)
ând
J302
(R
€hânnel). Insen
â 10
O resistor
berwe€n
the
rerpective
leads
and rerminak.
Connect
â VTVM
âcrors
each resistor.
Set the
CD-320 in
the recording
mode
of operarion.
Adiun
the semiJixed
.esastors
R146
(L
channel)
and R245
{R
chânnel)
untit
the
VTVM reads
0.45 mV eâch
chônnet.
3. P.oceed
both for the righr
and tefr
chânnek
in rhe
4.
Afrer
adiustmenr, r€tease
rhe reco.ding
biâs current.
(é_4ff.*.-,
Larâî
llfn
,e'a-.a.
*€T
"."
ffi"^.iëi
.:ô?i'..
5Bg R.cording
Bi.t
Curr.nt
Adju.r|nânr
lT.meord)
SET UP
1- Power
voltage:
Only wh€n
the
6 V DC
pow€r
voltagE
is
primary
for
fie unit
ônd this
pow€r
voltage
as unavailable,
use
AC
power
suppty.
2. TAPE
selecror
switchr
NORMAL
PBOGEDURES
1. Dkconnect
the recording
h€ad
,hiêtding
reao,
(groundins
l€ads)
at J302
{L
ch.nnet)
and J3O2
{R
ch.nnel}.
Inser
âr lO
O .etistor
bêtw€en
ùs
respective
reâds
and rerminah.
Connecr
a VTVM
âc.ors
eâch resisror.
Ser the
CD,320 in
the reco.ding
mode
of
op€.ation. Adjun
the semijixed
resirtors
R166
(L
chânnel)
and
R266
{R
chânne
untit
the
VTVM reads
3.2 mV
in
eôch channet.
2. For
rhe
CO-320 êquipped
with
thê
TAPE
setector
rwrtch,
make
cerrâin
thar thê VTVM
reads
âoorox,
imately
4.2
mV with
ir set
to rhê
CrO,
position.
trlr..,,*..
*r.6J
n"*3i_â
â,
nrriasrÀ/â..
iô],."
*iâ
"%à
!y
l0