Sharp SMO1854DS Service Manual

17
TROUBLESHOOTING GUIDE
(TROUBLE 1) Oven does not operate at all ; any inputs can not be accepted.
Following the procedures below to check if the oven is defective or not.
1. Check grounding before trouble checking.
2. Be careful of the high voltage circuit.
3. Discharge the high voltage capacitor.
4. When checking the continuity of the switches, fuse or high voltage transformer, disconnect one lead wire from these parts
and check continuity with the AC plug removed. To do otherwise may result in a false reading or damage to your meter.
NOTE : When electric parts are checked, be sure the power cord is not inserted the wall outlet.
Check wire harness, wiring and connections of the terminals and power cord before checking the parts
listed below.
CONDITION CHECK
Check continuity of interlock
monitor switch with door closed
Check continuity of of primary
interlock switch contact with door
partially open until interlock
monitor switch contact close
Malfunction of
interlock
monitor switch
Shorted
contacts of
primary
interlock switch.
RESULT
Continuity
No Continuity
No Continuity
Replace fuse
CAUSE REMEDY
Replace
(NOTE 1)
Fuse blows.
Replace
(NOTE 1)
Defective low
voltage
transformer
0Ω or infinite
Approx.
207~306
(normal)
Replace
Check continuity of primary
winding of low voltage
transformer
Defective high
voltage
capacitor
Normal
Replace
Disconnect one side of the lead
wire connected form high
voltage transformer to the high
voltage capacitor and operate
the unit
Continuity
Defective high
voltage
transformer
Fuse again
blows
Replace

Sharp SMO1854DS Specifications

General

Style	over the range
Color	stainless steel
Total Capacity	1.8 cu. ft.
Convection	no
Power Levels	10
Fan Speeds	3
Venting Type	non ducted
Sensor Cooking	yes
Quick Start	yes (1-6 minutes)
Control Type	touch control
Child Lock	yes
Timer	yes
Interior Light	led; yes
Microwave Power	1, 100 watts

Weight and Dimensions

Depth	15 9/10 inch
Height	16 3/10 inch
Width	29 9/10 inch