Sanyo EM-V5404SW - Full Size Microwave Oven, Service Manual

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NOTE: ALL DISASSEMBLY AND REPLACE-
MENT OF PARTS BEGINS WITH THE CABI-
NET REMOVED.
CAUTION: UNPLUG THE OVEN AND DIS-
CHARGE THE CAPACITOR BEFORE
REMOVING ANY OF THE COMPONENTS.
IMPORTANT: DO NOT OPERATE THE OVEN IF:
- THE DOOR DOES NOT FIT PROPERLY.
- THE WAVEGUIDE AND OVEN ARE NOT
INTACT.
- THE R-F GASKET IS MISSING. (THE R-F
GASKET IS LOCATED AROUND THE DOME
OF THE MAGNETRON TUBE TO PREVENT
ANY LEAKAGE BETWEEN THE MAG-
NETRON TUBE AND THE WAVEGUIDE.)
HIGH VOLTAGE DIODE REMOVAL
1 . Discharge the capacitor by shorting across
each terminal.
2. Remove one lead from capacitor.
3. Remove screw which holds other lead with
offset screwdriver.
4. Replace wire for wire, if replacement is
used. (Observe proper diode polarity.) The
arrow on diode should point to the capaci-
tor bracket.
5. To reinstall, reverse above procedure.
FAN ASSEMBLY REMOVAL
1 . Disconnect the two lead wires from the fan
motor.
2. Remove fan shroud by removing shroud
mounting screws.
3. Remove the two motor assembly mounting
screws secured to the back cabinet.
4. The entire fan assembly can then be
removed.
5. Remove the fan blade by pulling the fan
blade from the motor shaft.
6. To reassemble and install, reverse the
above procedure. Be sure to glue the fan
blade onto the motor shaft.
CAPACITOR REMOVAL
1. Discharge the capacitor.
2. Remove the screw(s) from capacitor
mounting bracket and swing it out of the
way.
3. If replacement capacitor is used, replace
wire for wire.
4. To reassemble, reverse the above proce-
dure. It is important for high voltage clear-
ance that the capacitor be firmly seated.
For proper capacitor testing procedure, see
Component Test Procedures.
POWER TRANSFORMER REMOVAL
1. Unplug the power cord, remove the outer
case and discharge the capacitor.
2. Disconnect all the leads to the transformer,
primary, secondary and filament. Remove
the support bracket at the top of the trans-
former.
3. Remove mounting screws from the under-
side of the chassis that fastens the trans-
former and lift the transformer out.
4. To reinstall, reverse the above procedure. It
is important that screws be tight since they
are the ground return for the high voltage
winding.
REMOVAL OF THE OVEN LIGHT
SOCKET/ LIGHT BULB
1. Unplug the power cord. Remove the outer
cabinet and discharge the capacitor.
2. Remove the socket/bulb mounting screw.
3. Remove socket/bulb assembly. Remove
wires from socket/ bulb terminals.
NOTE: BULB IS PART OF SOCKET AND
MUST BE REPLACED AS AN ASSEMBLY.
4. Replace wires on terminals of new socket
and replace socket/bulb by reinstalling the
mounting screw.
REPLACING THE FUSE
IMPORTANT : IF THE 2 0 AMP FUSE
BLOWS, REFER TO THE TESTING PROCE-
DURE. DO NOT REPLACE IT UNTIL THE
PROBLEM IS CORRECTED. ALSO, IF AT ANY
TIME THE OVEN FUSE BLOWS DUE TO AN
OVEN FAULT, OR THE CIRCUIT BREAKER
TRIPS AFTER BEING RESET ONCE WITH THE
HOUSE CIRCUIT UNLOADED (EXCEPT FOR
THE OVEN), THE INTERLOCK SWITCHES
MUST BE REPLACED AS A GROUP. THIS IS
BECAUSE THE SHORT CIRCUIT WILL HAVE
DAMAGED THESE IMPORTANT SWITCHES.
SEE INTERLOCK SWITCH REMOVAL.
NOTE: IF INTERLOCKS HAVE BEEN
REPLACED, IT IS VERY IMPORTANT TO
MAKE A MICROWAVE LEAKAGE CHECK OF
THE DOOR. SEE THE MICROWAVE LEAK-
AGE SECTION IN THIS MANUAL.
1. Unplug the power cord, remove the outer
cabinet and discharge the capacitor.
2. Remove the fuse.
3. A blown fuse can be diagnosed with an
ohmmeter.
4. Replace with a
2 0
Amp fuse.
NOTE: USE ONLY A NORMAL-BLOW 20
AMP TUBULAR CERAMIC FUSE SUCH AS
THE LITTELFUSE 3140120 20A. DO NOT
USE A SLOW BLOW FUSE.
INTERLOCK AND MONITOR SWITCH
REMOVAL
If for any reason one of the interlock switches
fail, all three must be replaced as a group.
1. Unplug the power cord, remove the outer cabinet
and discharge the capacitor. Open the door.
2. Remove the air guide from the front side of
the magnetron. The air guide is secured to
the right side of the oven cavity with a 2
piece plastic pin.
3. The switches are all mounted on a single
plastic bracket and are held in position with
plastic tabs.
4. Remove screws holding plastic switch
bracket to oven chassis.
5. After the switch bracket has been removed,
the tabs can be seen. By applying slight
pressure, the switch will release from the
switch bracket.
6. Remove switches and replace wire for wire.
Reverse above to reinstall.
CAUTION: WHEN REPLACING THE INTER-
LOCK SWITCHES, BE SURE THE MOUNT-
ING TABS ARE NOT BROKEN, BENT OR
OTHERWISE DEFICIENT IN THEIR ABILITY
TO PROPERLY RETAIN THE INTERLOCK
SWITCHES.
IMPORTANT: DO NOT OPERATE THE OVEN
UNTIL THE INTERLOCKS ARE PROPERLY
ADJUSTED. SEE DOOR AND INTERLOCK
ADJUSTMENTS SECTIONS.
IMPORTANT: THE INTERLOCK SWITCHES
MUST MEET STRICT FEDERAL REQUIRE-
MENTS FOR RELIABLE OPERATION. IT IS
EXTREMELY IMPORTANT THAT ANY QUES-
TIONABLE SWITCHES BE REPLACED WITH
THE EXACT SAME TYPE OBTAINED FROM
THE FACTORY SERVICE PARTS DIVISION.
DEFECTIVE SWITCHES MUST BE REN-
DERED INOPERATIVE BY TWISTING ONE
OF THE TERMINALS.
TURNTABLE OR STIRRER MOTOR
AND DRIVE
REMOVAL
1. Unplug the power cord, remove the outer
cabinet and discharge the capacitor.
2. Remove the glass tray and plastic turntable
assembly from the oven cavity.
3. Turn the oven upside down. Remove the
motor access cover. Upon initial service,
the cover, which is an integral part of the
bottom plate, must be cut free. Use wire
cutters to cut the 4 integral tabs. Be
careful
of sharp edges.
7
Noise Filter
THE NOISE
FILTER
(MODEL EM-E1100)