Sanyo EM-D993 Service Manual page 7

COMPONENT
1) Measure the resistance :
With an ohmeter on Rx1 scale.
a. Primary Winding ;
b. Filament Winding ;
c. Secondary Winding ;
2) Measure the resistance :
With an ohm-meter on highest scale.
a. Primary winding to ground ;
b. Filament winding to ground ;
HIGH
VOLTAGE
TRANSFORMER
1) Measure the resistance : Across two terminals with an
ohm-meter on highest scale
HIGH VOLTAGE
CAPACITOR
including
BLEEDER
RESISTOR
Measure the resistance : Across two terminals with an
ohm-meter on its highest scale.
HIGH
VOLTAGE
DIODE
CHECKOUT PROCEDURE
Figure 7
Figure 8
Figure 9
-6-
RESULTS
Normal readings :
Approximately 1.7 ohms.
Less than 1 ohm.
Approximately 92 ohms.
Normal readings :
Infinite ohms
Infinite ohms
Note : Remove varnish of
measured point.
Normal reading :
Momentarily indicates several
ohms, and gradually returns
to 10 Meg-ohm.
Abnormal reading :
Indicates continuity or 10MΩ
from the beginning.
Normal reading :
Indicates over 10MΩ in one
direction (forward direction)
and infinite ohms in the
reverse direction, using meter
which is provided with a 9-volt
battery.
NOTE
Some digital meters may
show over even in a forward
direction because low
measuring voltage of meter
does not allow the meter
current to pass through
the high voltage diode.
Abnormal reading:
Indicates continuity or infinite
ohms in both directions.