Magnetron Assembly Test - Wolf MWD24-2 Service Manual

Drawer Microwave
PROCEDURE LETTER
F
(Cont.)
G
(Models MWD24-2 / MWD30-2)
10. Disconnect the power supply cord, and then remove covers.
11. Open the drawer and block it open.
12. Discharge high voltage capacitor.
13. Disconnect the dummy resistor circuit from the sensor connector of control
panel.
14. Carry out necessary repair.
15. Reconnect all leads removed from components during testing and repairing.
16. Re-install the covers.
17. Reconnect the power supply cord after the outer case is installed. Run the
oven and check all functions.
18. Carry out "Water load cooking test" again and ensure that the oven works
properly.
R1, R2 : 22 Ω ± 1% 1/2W
R3 : 4.3k Ω ± 5% 1/4W
R4 : 1M Ω ± 5% 1/4W
To connector (F)
on Control Unit.
F-1
F-2
F-3
CONNECTOR
Refer to the Disassembly instructions found on page 16.

MAGNETRON ASSEMBLY TEST:

1. Disconnect the power supply cord.
2. Open the drawer and keep it open.
3. To discharge high voltage capacitor, wait for 60 seconds.
4. To test for an open filament, isolate the magnetron from the high voltage cir-
cuit. A continuity check across the magnetron filament leads should indicate
less than 1 ohm.
5. To test for a shorted magnetron, connect the ohmmeter leads between the
magnetron filament leads and chassis ground. This test should indicate an
infinite resistance. If there is little or no resistance the magnetron is grounded
and must be replaced.
6. Reconnect all leads removed from components during testing.
7. Reassemble the unit.
8. Reconnect the power supply cord.
9. Run the oven and check all functions.
5-11
COMPONENT TEST
1
2
R1
3
R3 R4
R2
(This Section continues on the next page)
#813632 - Revision B - December, 2009
Troubleshooting Guide
Plunger
NC
NO
COM
NO
COM
NC