Sharp R-290H, Service Manual

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R-290H(S)
7
CK = Check / RE = Replace
MAGNETRON POWER TRANSFORMER H.V. RECTIFIER ASSEMBLY HIGH VOLTAGE WIRE HIGH VOLTAGE CAPACITOR 1ST. LATCH SWITCH 2ND. INTERLOCK RELAY CONTROL SWITCH MONITOR SWITCH TEMPERATURE FUSE (OVEN) FAN MOTOR TURNTABLE MOTOR FUSE T6.3A TOUCH CONTROL PANEL RELAY (RY-1, RY-2) FOIL PATERN 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 KEY UNIT H.V. FUSE
Home fuse blows when power
supply cord is plugged into wall
outlet.
FUSE T6.3A 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 does not oper-
ate. (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 100%)
Oven does not seems to be
operating properly when 70%,
50%, 30% or 10% is set. (Oven
operates properly at 100% 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.
OFF
CONDITION
PROBLEM
CONDITION
POSSIBLE CAUSE
AND
DEFECTIVE PARTS
TEST PROCEDURE
ON
CONDITION
A B C
CK
D E E E F G G H K M N
RECKCKRE CKCKCKCKCK
I L J