Sharp R-350Y User Manual

7 – 1
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CHAPTER 7. TROUBLESHOOTING GUIDE
When troubleshooting the microwave oven, it is helpful to follow the
Sequence of Operation in performing the checks. Many of the possible
causes of trouble will require that a specific test be performed. These
tests are given a procedure letter which will be found in the “Test Pro-
cedure”section.
IMPORTANT:
If the oven becomes inoperative because of a blown fuse F10A in the
1st. latch switch - 2nd. interlock relay - monitor switch circuit, check the
1st. latch switch, 2nd.interlock relay and monitor switch before replac-
ing the fuse F10A.
MAGNETRON INVERTER UNIT
1ST. LATCH SWITCH 2ND. INTERLOCK RELAY CONTROL
SWITCH
MONITOR SWITCH TEMPERATURE FUSE (OVEN)
FAN MOTOR
TURNTABLE MOTOR
FUSE F10A TOUCH CONTROL PANEL
KEY UNIT
FUSE F1 ON P.W.B.
POWER SUPPLY CORD
SHORTED WIRE HARNESS OPENED WIRE HARNESS
OVEN LAMP
WALL OUTLET
MISADJUSTMENT SWITCH
HOME FUSE OR BREAKER
BLOCKED COOLING FAN BLOCKED VENTILATION NOISE FILTER HUMIDITY SENSOR
TEST PROCEDURE
CK = Check / RE = Replace
RE CK CK RE CK CK CK CK CK
CONDITION
PROBLEM
POSSIBLE CAUSE
AND
DEFECTIVE PARTS
ON
SENSOR
COOKING
CONDITION
CONDITION
OFF
CONDITION
Home fuse blows when power
supply cord is plugged into wall
outlet.
FUSE F10A blows when power
supply cord is plugged into wall
outlet.
Display does not show anything
when power supply cord is plug-
ged into wall outlet.
Display does not operate proper-
ly when STOP/CLEAR pad is
touched.
Oven lamp does not light at door
opened. (Display appears.)
Oven lamp does not light (Dis-
play appears.)
Fan motor does not operate.
(Display appears.)
Turntable motor does not oper-
ate. (Display appears.)
Oven does not start when the
START pad is touched. (Dis-
play appears)
Oven or any electrical parts does
not stop when cooking time is 0
or STOP/CLEAR pad is touched.
Oven goes into cook cycle but
shuts down before end of cook-
ing cycle.
Oven stops at 16 sec. after starting.
Humidity sensor does not end dur-
ing Sensor cooking condition.
(Oven doesnot shut off after a cup
of water is boiling by sensor cook-
ing.)
Oven seems to be operating but
little or no heat is produced in
oven load. (Microwave power lev-
el is set at 100%)
Oven does not seems to
be oper-
ating properly when 90% 10%
is set.
(Oven operates properly at 100%
and then the STOP/CLEAR pad
is touched the oven stops.)
A BBBCDDE GHI
JF
Page 9-1
R-350Y(S)

Sharp R-350Y Specifications

General

Brand	Sharp
Model	R-350Y
Category	Microwave Oven
Language	English