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COMPONENT
CHECKOUTPROCEDURE
RESULT
Measure
the resistance:
Across two terminals
Normal
reading:
with an ohm-meter
on highest scale.
Momentarily
indicates
several
ohms,
and
gradually
returns to 10 meg-ohms.
Abnormal
reading:
HIGH-VOLTAGE
Indicates
continuity
or 10 meg-ohms
from
CAPACITOR
Wm
the beginning.
including
BLEEDER
ohm-meter
a
RESISTOR
Figure
7
Measure
the resistance.
Across two terminals
Normal
reading:
with an ohm-meter
on R x 10,000
scale.
Indicates
about
the middle
position
in one
direction
(forward
direction)
and
infinite
ohms
in the
reverse direction,
using meter
H
which
is provided
with
a 9-volt
battery.
ohm-meter
NOTE
HIGH-VOLTAGE
'L
–
Some
digital
meter
may show over even
DIODE
~e"
0
in a forward
direction
because low measur-
ing
voltage
of
meter
does
not
allow
the
meter
current
to
pass through
the
high
voltage diode.
Figure
8
Abnormal
reading:
Indicates
continuity
or infinite
ohms in both
directions.
Measure
the resistance:
Across two
terminals
Normal
reading:
with an ohmmeter
on highest scale.
Indicates
infinite
ohms
in both directions.
'ad
Abnormal
reading:
Ohm-meter
Indicates
continuity
in both
directions
or
FUSE
DIODE
continuity
in
one
direction
and
infinite
,<
/-
—-,
ohms
in
reversed
direction.
/
',-.//
Am
/
/
Figure 9
Measure
the
voltage:
Between
test
points
TP-1,
TP-2
or TP-3
and ground
or between
7
TP-4
and TP-5. (See control
circuit
board on
Test
TP- 1
TP-2
TP-3
TP-41
Point
TP-5
page 19)
CONTROL
-5V
-12V
–30V
2.OV
CIRCUIT
BOARD
NOTE
Voltage
DC
Dc
Dc
AC
i
Proceed
with
the check of the step-down
transformer,
to see if any one of the measur-
ed
values
is different
from
the
specified
values.
–5–
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