Sharp R-7H55, Service Manual

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10
R-7H55
OFF
CONDITION
PROBLEM
CONDITION
CK = Check / RE = Replace
COOKING
CONDITION
(COMMON)
COOKING
CONDITION
(MICROWAVE)
COOKING
CONDITION
(CONVECTION)
POSSIBLE CAUSE
AND
DEFECTIVE PARTS
TEST PROCEDURE
SENSOR
COOKING
CONDITION
Home fuse blows when power supply cord
is plugged into wall outlet.
Fuse M8A blows when the door is opened.
FUSE M8A blows when power supply cord
is plugged into wall outlet.
"88:88" does not appear in display when
power supply cord is first plugged into wall
outlet.
Display does not operate properly when
STOP/CLEAR pad is touched. (The time of
day should be appear on the display with
beep sound during normal condition.)
Oven lamp does not light at door opened.
Oven lamp does not light at all.
Turntable motor does not operate. (Oven
lamp light.)
Cooling fan motor does not operate.
The oven stops after 1 minute.
Oven does not go into cook cycle, when
START pad is touched.
Low or no power is produced during micro-
wave cooking (The food is heated incom-
pletely or not heated at all)
Extremely uneven heating is produced in
oven load (food).
Function of variable cooking does not oper-
ate properly except HIGH power.
CONV indicator lights, but heating element
does not heat.
Temperature in the oven cavity is lower or
higher than preset.
When preheating, the oven does not stop.
Convection cycle runs 4 minutes and 15
seconds then the oven shuts down.
AH sensor does not end during 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
MAGNETRON POWER TRANSFORMER H.V. RECTIFIER ASSEMBLY HIGH VOLTAGE CAPACITOR 1ST. LATCH SWITCH 2ND. LATCH SWITCH STOP SWITCH MONITOR SWITCH FUSE M8A THERMAL CUT-OUT 145˚C (MG.) THERMAL CUT-OUT 95˚C (FAN) THERMAL CUT-OUT 150˚C (CONV.) FAN MOTOR TURNTABLE MOTOR CONVECTION MOTOR CONVECTION HEATER THERMISTOR
A B C D E E E E F G G G H H H I J