Read Sharp R-4G75M (serv.man7) Service Manual online
8
R-4G75(W)M
R-4G75(B)M
R-4G75(B)M
Fuse 13A blows when power cord is
plugged into wall outlet.
plugged into wall outlet.
Fuse M8A blows when the door is
opened.
opened.
Oven lamp does not light when
door is opened. (Display
appears.)
door is opened. (Display
appears.)
Home fuse blows when power
cord is plugged into wall outlet.
cord is plugged into wall outlet.
“88:88” does not appear in display
when power cord is plugged into
wall outlet.
when power cord is plugged into
wall outlet.
Display does not operate properly
when STOP pad is touched.
when STOP pad is touched.
Oven does not start when START
pad is touched. (Display appears.)
pad is touched. (Display appears.)
Oven lamp does not light.
(Turntable motor operates.)
(Turntable motor operates.)
Fan motor does not operate.
(Oven lamp light.)
(Oven lamp light.)
Turntable motor assembly does
not operate. (Oven lamp light.)
not operate. (Oven lamp light.)
Oven or electrical parts do not
stop when cooking time is 0 or
STOP pad is touched.
stop when cooking time is 0 or
STOP pad is touched.
Oven goes into cook cycle but
shuts down before end of cooking
cycle.
shuts down before end of cooking
cycle.
Oven stops as soon as the
START pad is touched. (Except
for Grill Cooking)
START pad is touched. (Except
for Grill Cooking)
Oven seems to be operating but
little or no heat is produced in
oven load. (Microwave power
level is set at ”HIGH”)
little or no heat is produced in
oven load. (Microwave power
level is set at ”HIGH”)
Oven does not operate properly
during the variable cooking
condition except ”HIGH” cooking
condition. (Oven operates
properly at HIGH)
during the variable cooking
condition except ”HIGH” cooking
condition. (Oven operates
properly at HIGH)
Oven goes into cook cycle but
shuts down before end of cooking
cycle.
Oven stops as soon as start pad
is touched.
shuts down before end of cooking
cycle.
Oven stops as soon as start pad
is touched.
Grill Heating element does not
operate.
operate.
Oven seems to be operating but
little or no heat is produced in
oven load. (Microwave power
does not seem to be generated
properly)
little or no heat is produced in
oven load. (Microwave power
does not seem to be generated
properly)
Grill Heating element does not
operate.
operate.
AH. sensor does not end during
Sensor cooking condition. (Oven
does not shut off when a cup of
water is boiling by Sensor
Cooking.)
Sensor cooking condition. (Oven
does not shut off when a cup of
water is boiling by Sensor
Cooking.)
Oven stops at 16 sec. after
starting
starting
TEST PROCEDURE
POSSIBLE CAUSE
AND
DEFECTIVE PARTS
PROBLEM
A B C D E E E E F F F G H
I J K K L
M O O O N P Q
CONDITION
MAGNETRON
POWER TRANSFORMER
H.V. RECTIFIER ASSEMBLY
H.V. CAPACITOR
PRIMARY LATCH SWITCH
2ND. LATCH SWITCH
MONITOR SWITCH
STOP SWITCH
THERMAL CUT-OUT 125˚C
THERMAL CUT-OUT 150˚C
THERMAL CUT-OUT 160˚C
FUSE 13A
FUSE M8A
NOISE FILTER
MONITOR RESISTOR
FAN MOTOR
TURNTABLE MOTOR
GRILL HEATING ELEMENTS
POWER SUPPLY CORD
OVEN LAMP OR SOCKET
SHORTED WIRE HARNESS
OPENED WIRE HARNESS
MISADJUSTMENT SWITCHES
TOUCH CONTROL PANEL
RELAY RY-1
RELAY RY-2
RELAY RY-3
KEY UNIT
FOIL PATTERN ON PWB.
AH. SENSOR ASSEMBLY
GRILL
COOKING
CONDITION
COOKING
CONDITION
DUAL
COOKING
CONDITION
COOKING
CONDITION
SENSOR
COOKING
CONDITION
COOKING
CONDITION
MICROWAVE
COOKING
CONDITION
COOKING
CONDITION
COOKING
CONDITION
(COMMON)
CONDITION
(COMMON)
OFF
CONDITION
CONDITION
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