High-Voltage Capacitor; High-Voltage Diode - Sanyo EM-842WS Service Manual Supplement

COMPONENT COMPONENT
COMPONENT COMPONENT COMPONENT
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 R x 10,000 scale.
HIGH-VOLTAGE
DIODE
Measure the voltage : Between test point TP-1,
TP-2, TP-3 or TP-4 and Ground between TP-5
and TP-6 (See Control Circuit Board on
page 19).
CONTROL
CIRCUIT
BOARD
- Proceed with the check of the Step-Down
Transformer, to see if any one of the measured
values is different from the specified values.
CHECKOUT PROCEDURE CHECKOUT PROCEDURE
CHECKOUT PROCEDURE CHECKOUT PROCEDURE CHECKOUT PROCEDURE
Ohm-Meter Ohm-Meter
Ohm-Meter Ohm-Meter Ohm-Meter
Ohm-Meter Ohm-Meter Ohm-Meter Ohm-Meter Ohm-Meter
NOTE NOTE NOTE
NOTE NOTE
Normal reading :
Momentarily indicates several Ohms,
and gradually returns to 10 Meg-Ohms.
Abnormal reading :
Indicates continuity or 10 Meg-Ohms
from the beginning.
Figure 7 Figure 7 Figure 7
Figure 7 Figure 7
Normal reading :
Indicates about the middle position in
one direction (forward direction) and
infinite Ohms in the reverse direction,
using meter which is provided with a
9 volt battery.
- Some digital meter 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.
Figure 8 Figure 8 Figure 8 Figure 8 Figure 8
Test
Point
Voltage
- 5 -
RESUL RESULT T T T T RESUL
RESUL RESUL
NOTE NOTE
NOTE NOTE NOTE
TP-1 TP-2 TP-3 TP-4
-5V -15V -25V -36V 2.0V
DC DC DC DC
TP-5 /
TP-6
AC