Sanyo EM-P472WS, Service Manual

Page: 7 / 24

A. A. A. A. A. TEST PROCEDURES TEST PROCEDURES TEST PROCEDURES TEST PROCEDURES TEST PROCEDURES
COMPONENT COMPONENT
COMPONENT COMPONENT COMPONENT
CHECKOUT PROCEDURE CHECKOUT PROCEDURE
CHECKOUT PROCEDURE CHECKOUT PROCEDURE CHECKOUT PROCEDURE
RESUL RESUL
RESUL RESUL RESULTTTTT
1) Check for resistance : Across the filament Normal reading :
terminals of the Magnetron with an Ohm-Meter Less than 1 Ohm.
on R x 1 scale.
2) Check for resistance : Between each filament Normal reading :
terminal of the Magnetron and the chassis Infinite Ohms.
ground with an Ohm-Meter on highest scale.
1) Measure the resistance : Normal readings :
With an Ohm-Meter on R x 1 scale.
a.
Primary winding : Approximately 0.31 Ohms.
b. Filament winding : Less than 1 Ohm.
c. Secondary winding : Approximately 67.5 Ohms.
2) Measure the resistance : Normal readings :
With an Ohm-Meter on highest scale.
a.
Primary winding to ground. Infinite Ohms.
b Filament winding to ground. Infinite Ohms.
Note Note Note Note Note : Remove varnish of
measured point.
Filament Windings
Primary
Windings
Secondary
Windings
6. TEST PROCEDURES AND TROUBLESHOOTING 6. TEST PROCEDURES AND TROUBLESHOOTING
6. TEST PROCEDURES AND TROUBLESHOOTING 6. TEST PROCEDURES AND TROUBLESHOOTING
6. TEST PROCEDURES AND TROUBLESHOOTING
CAUTION CAUTION CAUTION CAUTION CAUTION
- DISCONNECT THE POWER SUPPL - DISCONNECT THE POWER SUPPL - DISCONNECT THE POWER SUPPL - DISCONNECT THE POWER SUPPL - DISCONNECT THE POWER SUPPLY CORD FROM Y CORD FROM Y CORD FROM Y CORD FROM Y CORD FROM
THE W THE W THE W THE W THE WALL OUTLET WHENEVER REMOVING THE ALL OUTLET WHENEVER REMOVING THE ALL OUTLET WHENEVER REMOVING THE ALL OUTLET WHENEVER REMOVING THE ALL OUTLET WHENEVER REMOVING THE
CABINET FROM THE UNIT CABINET FROM THE UNIT CABINET FROM THE UNIT CABINET FROM THE UNIT CABINET FROM THE UNIT, PROCEED WITH THE , PROCEED WITH THE , PROCEED WITH THE , PROCEED WITH THE , PROCEED WITH THE
TESTS ONL TESTS ONL TESTS ONL TESTS ONL TESTS ONLY AFTER DISCHARGING THE HIGH Y AFTER DISCHARGING THE HIGH Y AFTER DISCHARGING THE HIGH Y AFTER DISCHARGING THE HIGH Y AFTER DISCHARGING THE HIGH
VOL VOL
VOL VOL VOLTTTTTAGE CAP
AGE CAP
AGE CAP AGE CAP AGE CAPACITOR AND REMOVING THE LEAD
ACITOR AND REMOVING THE LEAD
ACITOR AND REMOVING THE LEAD ACITOR AND REMOVING THE LEAD ACITOR AND REMOVING THE LEAD
WIRES FROM THE PRIMAR WIRES FROM THE PRIMAR
WIRES FROM THE PRIMAR WIRES FROM THE PRIMAR
WIRES FROM THE PRIMARY WINDING OF THE Y WINDING OF THE
Y WINDING OF THE Y WINDING OF THE
Y WINDING OF THE
HIGH VOL HIGH VOL HIGH VOL HIGH VOL HIGH VOLTTTTTAGE TRANSFORMER. (SEE FIGURE 3) AGE TRANSFORMER. (SEE FIGURE 3) AGE TRANSFORMER. (SEE FIGURE 3) AGE TRANSFORMER. (SEE FIGURE 3) AGE TRANSFORMER. (SEE FIGURE 3)
Figure 3 Figure 3 Figure 3 Figure 3 Figure 3
Figure 4 Figure 4
Figure 4 Figure 4
Figure 4
Figure 5 Figure 5 Figure 5 Figure 5 Figure 5
Figure 6 Figure 6 Figure 6 Figure 6 Figure 6
Ohm-Meter Ohm-Meter Ohm-Meter Ohm-Meter Ohm-Meter
Ohm-Meter Ohm-Meter Ohm-Meter Ohm-Meter Ohm-Meter
Ohm-meter Ohm-meter Ohm-meter Ohm-meter Ohm-meter
- 4 -
HIGH-VOLTAGE
TRANSFORMER
MAGNETRON