R-96 (serv.man3). R96ST Supplement refers to this - Sharp Home Appliance Service Manual (repair manual). Page 13

R-953/963M - 11

Fuse F8A blows when the door is opened.
Home fuse blows when power cord is plugged into wall outlet.
Fuse 20A blows when power cord is plugged into wall outlet.
Nothing appears in display when power cord is plugged into wall outlet 
and the door is opened and closed.
Display does not operate properly when STOP/CLEAR key is touched.
Oven lamp does not light when door is opened. (Display operates.)
Oven does not start when the START key is touched. (Display operates.)
Oven lamp does not light  and turntable motor does not operate.
Fan motor does not operate. (Oven lamp lights.)
Convection fan motor does not operate. (Fan motor operates.)
Turntable motor does not operate. (Oven lamp lights.)
Oven or any electrical parts (except fan motor) does not stop when 
cooking time is 0 or STOP/CLEAR key is touched.
Oven stops after 4 minutes and 15 seconds since START key is 
touched. (Except Microwave mode and Dual cook mode)
Display operates properly but all electrical parts do not operate.
Oven goes into cook cycle but shuts down before end of cooking cycle.
After cooking, the temperature of oven cavity is higher than 120ßC but 
fan motor does not operate.
The oven stops 1 minute after starting.
Oven seems to be operating but little or no heat is produced in oven 
load. (Microwave power control is set at 100%)
Oven does not seem to be operating properly during variable cooking 
condition except 100% cooking condition.
Oven goes into cook cycle but shuts down before end of cooking cycle.
Convection cooking mode does not heat.
Oven seems to be operating but the temperature in the oven cavity is 
lower or higher than preset one. 

Grill heating element does not operate.

Oven goes into cook cycle but shuts down before end of cooking cycle.
Oven seems to be operating but little or no heat is produced in oven 
load. (Microwave power does not seem to be generated properly)
Oven seems to be operating but the temperature in the oven cavity is 
lower or higher than preset one. 
Convection heating elements do not heat.

Grill heating element does not heat.

Oven is in sensor cooking condition but AH sensor doesnot stop cooking 
cycle, or oven stop soon and display shows "ERROR".

OFF

CONDITION

COOKING

CONDITION

(COMMON MODE)

MICROWAVE

COOKING

CONDITION

GRILL COOKING

CONDITION

CONVECTION

COOKING

CONDITION

DUAL COOKING

CONDITION

(COMMON MODE)

DUAL COOKING

CONDITION

(MICRO./CONV.)

DUAL COOKING

CONDITION

(MICRO./GRILL)

SENSOR

 COOKING

CONDITION

CONDITION

PROBLEM

BLOCKED 

COOLING FAN

BLOCKED 

CONVECTION FAN

NO POWER AT WALL OUTLET

HOME FUSE OR BREAKER

MIS-ADJUSTMENT OF SWITCHES

BLOCKED VENTILATION OPENINGS

OPENED WIRE HARNESS

SHORTED WIRE HARNESS

OVEN LAMP OR SOCKET

POWER SUPPLY CORD

AH SENSOR

FOIL PATTERN ON P.W.B.

RELAY RY8

RELAY RY7

RELAY RY6

RELAY RY5

RELAY RY4

RELAY RY3

RELAY RY2

RELAY RY1

KEY UNIT

TOUCH CONTROL PANEL

TC TRANSFORMER

CONVECTION HEATING ELEMENT

GRILL HEATING ELEMENT

FUSE F8A

FUSE 20A

NOISE FILTER

DAMPER MOTOR

CONVECTION FAN MOTOR

FAN MOTOR

TURNTABLE MOTOR

THERMAL CUT-OUT 170

ß

C (CONV.)

THERMAL CUT-OUT 170

ß

C (GRILL)

THERMAL CUT-OUT 125

ß

C 

THERMISTOR

DAMPER SWITCH

MONITOR SWITCH

STOP SWITCH

MONITORED LATCH SWITCH SW1

HIGH VOLTAGE CAPACITOR

H.V. HARNESS

H.V. RECTIFIER ASSEMBLY

HIGH VOLTAGE  TRANSFORMER

MAGNETRON

A B C

D E E E E F G G G H H H H

TEST PROCEDURE

POSSIBLE CAUSE

AND

DEFECTIVE PARTS

I

J K L L

M N O O O O O O O O P Q