Sharp MMD24S 用户手册

8

.  Disconnect the power supply cord.
2.  Open the drawer and block it open.
3.  Discharge high voltage capacitor.
4.  Disconnect  the  primary  input  terminals  and  measure  the  resistance  of  the  transformer  with  an 

ohmmeter. Check for continuity of the coils with an ohmmeter. On the R x  scale, the resistance 
of the primary coil should be less than  ohm and the resistance of the high voltage coil should be 
approximately 90 ohms; the resistance of the filament coil should be less than  ohm.

5.  Reconnect all leads removed from components during testing.
6. 

Reassemble the unit.

7.  Reconnect the power supply cord.
8.  Run the oven and check all functions.

(HIGH VOLTAGES ARE PRESENT AT THE HIGH VOLTAGE TERMINAL, SO DO NOT ATTEMPT TO 
MEASURE THE FILAMENT AND HIGH VOLTAGE.)

2.  Open the drawer and block it open.
3.  To discharge high voltage capacitor, wait for 60 seconds.
4.  If the monitor fuse is blown when the drawer is opened, check the primary interlock switch, secondary 

interlock switch and monitor switch according to the "TEST PROCEDURE" for those switches before 
replacing the blown monitor fuse.

CAUTION:  BEFORE REPLACING A BLOWN MONITOR FUSE, TEST THE SECONDARY INTERLOCK 

SWITCH, STOP SWITCH AND MONITOR SWITCH FOR PROPER OPERATION. 

 

If the monitor fuse  is blown by improper switch operation, the monitor fuse and monitor switch must 
be replaced with "monitor fuse and monitor switch assembly" part number FFS-BA08/KIT, even if 
the monitor switch operates normally. The monitor fuse and monitor switch assembly is comprised 
of a 20 ampere fuse and switch.

5.  Reconnect all leads removed from components during testing.
6. 

Reassemble the unit.

7.  Reconnect the power supply cord.
8.  Run the oven and check all functions.

                               .  Disconnect the power supply cord.