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Replacementof
PARTS Periodically"
"
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"
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The
parts
shown
below,
it
is
need
to exchange
periodically.
Parts
Exchanqe
Standard
1.
Magnetron
4,000
hours
2.
Motor
10.000
hours
3. LCD 50.000
hours
4.
Fan
Motor 20.000
hours
5.
Lithium
battery 3
years
Replacement
of Magnetron
(V1A/201
)
Remove
the shield
cover of
the modulator
and
check
lhat
no charge
remains
in
the
high-voltage modulator
circuit. Then,
remove
the
socket
of
the
magnetron.
Removing the screws
fixing it can demount
the
magnetron.
When mounting a
new
magnetron,
do not touch the magnet
with a
screwdriver
or
put
it on an
iron
place.
After
replacement, connect the lead
wire correctly.
Handlinq of
Maqnetron under Lonq-Time
Storaqe
The magnetron
that
has
been kept in storage for a
long lime may cause
sparks
and
operate
unstably
when its
operalion
is started.
Perform
the
aging in the following
orocedures:
(1)
Warm
up
the
cathode
for
a
longer
time
than usually.
(20
to 30
minutes
in
the
STBY state.)
(2)
Start the operation
from
the
short
pulse
range
and shift
is
gradually
to the
longer
pulse
ranges.
lf the
operation
becomes
unstable
during
this
process,
return
it to
the standby
mode
immediately.
Keep
the
state
for 5 to 10 minutes until the
operation is restarted.
(3)
Afier transmission is made for about
15
minutes, conduct the
tuning adjustment.
(4)
Adjust RV1
within
the
receiver
so
that
the
bar
graph
of
the
tuning indicator on the
display
reaches
the reading
10 without
saturation.
8-26
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