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HITACHI
HGE-21OO
ADJUSTMENTS
.
EINSTELLVERFAHREN
.
a
BBD
Output Clock Canceller
Adjustment
Set
the
range of the
A.C.
voltmeter
to
1OO
mV
(Max),
Connect
to
point
A,
and
set
Time/cm
on
the oscilloscope
to
0.5
msec.
Ob-
serve
the waveform
on
the
oscilloscope,
and adjust R585
such
that
the
BBD
output clock
elements are eliminated (adjust to
give
the central
waveform
in
Fig
2)
O
BBD-Einstellung
des
Ausgangsuhrunterbrechers
Das
Wechselstrom-Voltmeter
auf
1OO
mV
(max)
stellen,
an
Punkt
A
anschlieBen und
Zeitlcm
auf
dem
Oszilloskop
auf 0,5
mSek.
stellen.
Die
Wellenform auf dem
Oszilloskop beobachten
und den R585 so
justieren,
daB daB
die
BBD-Ausgangs-
uhrelemente
eliminiert werden (so
einstellen, daB
die
in
Abb.
2
gezeigte
Mittenwellenfrom
entsteht)
O
Réglage
d'annulation
horaire de
soÉie
BBD
Régler
la
gamme
du
voltmètre
de
courant secteur
à
1OO
mV
(maximum),
raccorder
en
A et
régler
le
temps/cm sur
l'oscillos-
cope
à
0,5 msec. Tout
en observant
la
forme de
l'onde
sur
I'os-
cilloscope, ajuster R5B5 de sorte
que
les caractéristiques
hor-
aires
de
la
sortie
BBD
soient
annulées (ajuster
de
manière
à
ob-
tenir
une
onde centrale du type de celle de la
Fig.
2).
BLOCK DIAG
.
BLOCKSCHEMA
.
SCHEMA
Fig.2
Abb.2
Fig.3
Abb.3
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MIXING
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REVERB
R586
tok
REVERA
LEVEL
ADJ
-
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2oV
6OHz
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SELECTOR
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(to. Asia
&
Latin
American
countries, elc
ì
Check
that
exposed
parts
are
acceptably
insulated
from the supply
circuit
before returning
the
instru-
ment repaired to
the
customer.
O
Checking method
-
Power
switch
is
set
lo
ON
-
Next, measure
the
resistance value
between
the
both
poles
of
attachement
cup
(Power
supply
plug) and
the
input terminal
(outside)
of
rear
plate and check
that the
resistance value is
500
kohms or more.
lnsulation tester
-4-
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