Read Sharp R-246 (serv.man2) Service Manual online
6
R-246(G)
R-246(SL)
R-246(W)
R-246(SL)
R-246(W)
When troubleshooting the microwave oven, it is helpful to
follow the Sequence of Operation in performing the
checks. Many of the possible causes of trouble will require
that a specific test be performed. These tests are given a
procedure letter which will be found in the "Test Procedure
"section.
follow the Sequence of Operation in performing the
checks. Many of the possible causes of trouble will require
that a specific test be performed. These tests are given a
procedure letter which will be found in the "Test Procedure
"section.
IMPORTANT: If the oven becomes inoperative because
of a blown fuse T6.3A in the monitored
latch switch - monitor switch circuit, check
the monitored latch switch and monitor
switch before replacing the fuse T6.3A.
latch switch - monitor switch circuit, check
the monitored latch switch and monitor
switch before replacing the fuse T6.3A.
TROUBLESHOOTING GUIDE
CK = Check / RE = Replace
MAGNETRON
HIGH VOLTAGE TRANSFORMER
H.V. RECTIFIER ASSEMBLY
HIGH VOLTAGE WIRE
HIGH VOLTAGE CAPACITOR
MONITORED. LATCH SWITCH
2ND. INTERLOCK RELAY CONTROL
SWITCH
MONITOR SWITCH
THERMAL CUT-OUT 125˚C (OVEN)
THERMAL CUT-OUT 95˚C (MG)
FAN MOTOR
TURNTABLE MOTOR
FUSE T6.3A
TOUCH CONTROL PANEL
RELAY (RY-1)
RELAY (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.
supply cord is plugged into
wall outlet.
FUSE T6.3A blows when
power supply cord is plugged
into wall outlet.
power supply cord is plugged
into wall outlet.
"88:88" does not appear in
display but power supply cord
is plugged into wall outlet.
display but power supply cord
is plugged into wall outlet.
Display does not operate
properly when STOP/CLEAR
pad is touched.
properly when STOP/CLEAR
pad is touched.
Oven does not start when the
START pad is touched.
(Display appears)
START pad is touched.
(Display appears)
Oven lamp does not light
(Display appears.)
(Display appears.)
Fan motor does not operate.
(Display appears.)
(Display appears.)
Turntable motor does not
operate. (Display appears.)
operate. (Display appears.)
Oven or any electrical parts
does not stop when cooking
time is 0 or STOP/CLEAR pad
is touched.
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)
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 70%,
50%, 30% or 10% is set. (Oven
operates properly at 100%
when the STOP/CLEAR pad
is touched the oven stops.)
operating properly when 70%,
50%, 30% or 10% is set. (Oven
operates properly at 100%
when the STOP/CLEAR pad
is touched the oven stops.)
Oven goes into cook cycle but
shuts down before end of
cooking cycle.
shuts down before end of
cooking cycle.
OFF
CONDITION
CONDITION
PROBLEM
CONDITION
POSSIBLE CAUSE
AND
DEFECTIVE PARTS
TEST PROCEDURE
ON
CONDITION
CONDITION
A B C
CK
D E
E E F F G G H K M M N
RECKCKRE CKCKCKCKCK
I L J
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