Sharp R-4A56, Service Manual

Page: 9 / 40

R-4A56
7
MAGNETRON POWER TRANSFORMER H.V. RECTIFIER ASSEMBLY HIGH VOLTAGE CAPACITOR UPPER LATCH SWITCH LOWER LATCH SWITCH STOP SWITCH MONITOR SWITCH NOISE FILTER (FOR N.Z.) MONITOR RESISTOR TEMPERATURE FUSE THERMAL CUT-OUT FAN MOTOR TURNTABLE MOTOR FUSE M8A TOUCH CONTROL PANEL RELAY (RY-1, RY-2) FOIL PATERN ON P.W.B. POWER SUPPLY CORD OVEN LAMP OR SOCKET HIGH OLTAGE WIRE SHORTED WIRE HARNESS OPENED WIRE HARNESS WALL OUTLET HOME FUSE OR BREAKER WRONG OPERATION MISADJUSTMENT SWITCH BLOCKED COOLING FAN BLOCKED VENTILATION OPENING
Home fuse blows when power
supply cord is plugged into wall
outlet.
FUSE M8A blows when power
supply cord is plugged into wall
outlet.
"88:88" does not appear in dis-
play but power supply cord is
plugged into wall outlet.
Display does not operate prop-
erly when STOP/CLEAR pad
is touched.
Oven lamp does not light at
door opened. (Display ap-
pears.)
Oven does not start when the
START pad is touched. (Dis-
play appears)
Oven lamp does not light (Dis-
play appears.)
Fan motor does not operate.
(Display appears.)
Turntable motor assembly does
not operate. (Display appears.)
Oven or any electrical parts
does not stop when cooking
time is 0 or STOP/CLEAR pad
is touched.
Oven seems to be operating
but little or no heat is produced
in oven load. (Microwave power
level is set at HIGH)
Oven does not seems to be
operating properly when ME-
DIUM HIGH, MEDIUM, ME-
DIUM LOW or LOW is set.
(Oven operates properly at
HIGH and then the STOP/
CLEAR pad is touched the oven
stops.)
Oven goes into cook cycle but
shuts down before end of cook-
ing cycle.
Oven stops as soon as when
the START pad is touched.
OFF
CONDITION
PROBLEM
CONDITION
POSSIBLE CAUSE
AND
DEFECTIVE PARTS
TEST PROCEDURE
ON
CONDITION
CK = Check / RE = Replace
A B C D E E E E F G H H I I J K M N
RE RE CK CKCKCK CKCKCK CKCK