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
BALANCE
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REVERB
R586
tok
REVERA LEVEL ADJ
-
I 2oV 6OHz
-220V
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-
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52
St
ffisE
SELECTOR
sw
PToOI
sw POVIER
I
rilNs
(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-
^\