Test Procedures And Troubleshooting - Sanyo EM-V5405SW Supplement Of Service Manual

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
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, PROCEED WITH THE CABINET FROM THE UNIT CABINET FROM THE UNIT
TESTS ONL TESTS ONLY AFTER DISCHARGING THE HIGH TESTS ONL Y AFTER DISCHARGING THE HIGH Y AFTER DISCHARGING THE HIGH Y AFTER DISCHARGING THE HIGH
TESTS ONL TESTS ONL Y AFTER DISCHARGING THE HIGH
VOL VOL VOLT T T T T AGE CAP AGE CAP AGE CAP ACITOR AND REMOVING THE LEAD ACITOR AND REMOVING THE LEAD
VOL VOL AGE CAP AGE CAPACITOR 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 PRIMARY WINDING OF THE WIRES FROM THE PRIMAR
HIGH VOL HIGH VOL HIGH VOL HIGH VOL HIGH VOLT T T T T AGE TRANSFORMER. (SEE FIGURE 3) AGE TRANSFORMER. (SEE FIGURE 3) AGE TRANSFORMER. (SEE FIGURE 3) AGE TRANSFORMER. (SEE FIGURE 3) AGE TRANSFORMER. (SEE FIGURE 3)
A. A. A. A. TEST PROCEDURES A. TEST PROCEDURES TEST PROCEDURES TEST PROCEDURES TEST PROCEDURES
COMPONENT COMPONENT COMPONENT COMPONENT COMPONENT
1) Check for resistance : Across the filament
MAGNETRON
2) Check for resistance : Between each filament
1) Measure the resistance :
2) Measure the resistance :
HIGH-VOLTAGE
TRANSFORMER
Note Note Note : Remove varnish of
Note Note
Y CORD FROM Y CORD FROM
Y CORD FROM Y CORD FROM
, PROCEED WITH THE , PROCEED WITH THE , PROCEED WITH THE , PROCEED WITH THE
Y WINDING OF THE Y WINDING OF THE Y WINDING OF THE Y WINDING OF THE
CHECKOUT PROCEDURE CHECKOUT PROCEDURE CHECKOUT PROCEDURE CHECKOUT PROCEDURE CHECKOUT PROCEDURE
terminals of the Magnetron with an Ohm-Meter
on R x 1 scale.
Ohm-Meter Ohm-Meter Ohm-Meter Ohm-Meter Ohm-Meter
terminal of the Magnetron and the chassis
ground with an Ohm-Meter on highest scale.
Ohm-Meter Ohm-Meter Ohm-Meter Ohm-Meter Ohm-Meter
With an Ohm-Meter on R x 1 scale.
a. Primary winding :
b. Filament winding :
c. Secondary winding :
With an Ohm-Meter on highest scale.
a. Primary winding to ground.
b Filament winding to ground.
Ohm-Meter Ohm-Meter Ohm-Meter
Ohm-Meter Ohm-Meter
measured point.
Secondary
Windings
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
- 4 -
Filament Windings
Primary
Windings
Figure 3 Figure 3 Figure 3 Figure 3 Figure 3
RESUL RESUL RESULT T T T T RESUL RESUL
Normal reading :
Less than 1 Ohm.
Normal reading :
Infinite Ohms.
Normal readings :
Approximately 0.38 Ohms.
Less than 1 Ohm.
Approximately 82.0 Ohms.
Normal readings :
Infinite Ohms.
Infinite Ohms.