Frigidaire Microwave Oven 316495069 User Manual

MICROWAVE OVEN TECH SHEET  
Schematic Diagram  
Wiring Diagram  
CAUTION  
Warning : Power must be disconnected before servicing this appliance  
Warning : Power must be disconnected before servicing this appliance  
Disconnect from Electrical Supply Before Servicing Unit  
MODEL NO. :  
FMV152K  
MODEL NO. :  
F
MV152K  
PRECAUTIONS TO BE OBSERVED BEFORE AND  
DURING SERVICING TO AVOID PROSSIBLE  
EXPOSURE TO EXCESSIVE MICROWAVE ENERGY  
OG:ORANGE  
YW:YELLOW  
BR:BROWN  
WH:WHITE  
BK:BLACK  
RD:RED  
BL:BLUE  
GN:GREEN  
GY:GREY  
PK:PINK  
CAVITY  
check the magnetron. Waveguide or  
THERMAL  
A. Do not operate or allow the oven to be  
YW-32  
WH-31  
DOOR  
SENSING  
SWITCH  
CUT-OUT  
(1 0/0)  
1
transmission line. And cavity for proper  
operated with the door open.  
OG:ORANGE BR:BROWN  
YW:YELLOW WH:WHITE  
YW-32  
WH-31  
alignment, integrity and connection.  
D. Any detective or mis-adjusted  
B. Make the following safety checks on all  
ovens to be serviced before activating the  
Magnetron or other microwave source,  
and make repairs as necessary.  
1. Interlock operating.  
2. Proper door closing.  
3. Seal and sealing surfaces ( Arcing,  
wear and other damage.)  
12  
BK-17  
WH-15  
WH-15  
RD:RED  
BK:BLACK  
T/TABLE  
MOTOR  
VENT  
BL:BLUE  
GN:GREEN  
GY:GREY  
PK:PINK  
MOTOR  
components in the interlock, monitor, door  
seal, and microwave generation and  
transmission systems shall be repaired.  
replaced. or adjusted by producers.  
BK-24  
BL-25  
GROUND  
7
8
YW-7  
HARNESS LEADS  
FAN  
MOTOR  
HI (RY5)  
WH-16  
PARTS LEADS  
GY-26  
GN-23  
OG-18  
BL-20  
OG-18  
BR-22  
YW-6  
designed in this manual before the oven  
Is released to the owner.  
OVEN  
LAMP  
LOW  
(RY4)  
BK-17  
WH-16  
BL-20  
RD-5  
4. Damage to or loosening of hinges  
9
6
1
E. A microwave leakage check to verify  
Compliance with the Federal performance  
Standard should be performed on each  
oven prior to release to the owner.  
F. Do not attempt to operate the oven if the  
door glass is broken.  
YW-19  
YW-21  
COOKTOP  
LAMP  
and latch.  
GN-23  
5. Evidence of dropping or abuse.  
C. Before turning on microwave power for  
any service test or inspection within the  
microwave generating compartments.  
ON  
(RY3)  
WH-30  
H.V.CAPACITOR  
L
GN-28  
YW-29  
OG-27  
BL-25  
VENT  
MOTOR  
COOKTOP  
LAMP  
RD  
RD  
WH  
WH-12  
BK-10  
L
POWER  
RELAY  
FA  
F
MGT TUBE  
RD  
H.V.DIODE  
BK-1  
BK-2  
CAVITY  
THERMOSTAT  
POWER  
CORD  
1
3
H.V.TRANS  
L.V.T  
BK-2  
BK-3  
Parts Layout  
MGT  
THERMOSTAT  
L
120V  
OVEN  
LAMP  
GND  
BK-3  
BK-4  
VENT MOTOR  
BOTTOM  
THERMOSTAT  
OVEN  
THERMOSTAT  
P C B  
GY-26  
BK-24  
120V  
MOTOR  
CONDENSER  
TURNTABLE  
HOOD  
THERMOSTATA  
MOTOR  
NOISE FILTER  
TTM  
OG-27  
FAN  
RELAY  
SUB  
(RELAY 1)  
OVEN LAMP  
MOTOR  
FM  
4
H.V.CAPACITOR  
OUT  
IN  
NOISE  
FILTER  
PRIMARY  
SWITCH  
MONITOR  
SWITCH  
MOTOR  
CONDENSER  
POWER RELAY  
(RELAY 2)  
H.V.DIODE  
MAGNETRON  
MONITOR  
INTERLOOK  
SWITCH  
T/TABLE  
MOTOR  
MAGNETRON  
THERMOSTATA  
H.V.  
TRANS  
H.V.TRANSFORMER  
12  
11  
MONITOR  
SWITCH  
NOTE: For servicing replacement use 16GA,105 C thermoplastic covered wire  
except for high voltage leads or as noted on special leads.  
FAN MOTOR  
H.V.  
CAPACITOR  
COOK TOP  
LAMPS  
DOOR  
SENSE  
SWITCH (BOTTOM)  
HOOD THERMOSTAT  
MAGNETRON  
PRIMARY  
SWITCH  
BOTTOM  
THERMOSTAT  
H.V.DIODE  
DOOR  
SENSING  
SWITCH  
Made in china  
NOTE: Door is open  
Switch Chart  
Component tests  
Other component tests  
DOOR  
DOOR  
SWITCH  
CHECK BY  
CLOSE  
WARNING  
Test  
Components  
Results  
Disconnect the wires at the Primary Interlock Switch.  
Check from the common terminal  
to the normally opened terminal.  
_
Primary  
Interlock  
+
T/Table Motor  
1. Remove wire leads.  
Personal injury/Product Hazard  
Normal:  
Disconnect the power supply cord  
after performing any test or repairs  
Approximately: 3.3k ohms  
to the microwave.  
Disconnect the wires at the sensing interlock Switch.  
Check from the common terminal and  
Normally closed terminal  
2. Measure resistance. ( ohm meter scale:  
Rx1000)  
from the outlet before removing the  
_
+
Door sensing  
Interlock  
outer cabinet from the unit.  
Check that all wire leads are in the  
+
_
Discharge the high voltage capacitor  
and remove the lead wires from  
The primary winding of the high voltage  
transformer before conducting any of  
Correct position before operating  
The microwave oven.  
Grasp wire connectors when  
removing the wire leads from  
microwave parts.  
Disconnect the wires at the Monitor Switch.  
Check from the common terminal and  
Normally closed terminal .  
Monitor  
Interlock  
the following tests.  
Fan Motor  
1. Remove wire leads.  
Conduct all operation tests with 1 liter  
Failure to follow these instructions may  
Normal:  
of water in the oven.  
result in electrical shock or other  
(
(
) CONTINUITY  
+
_
Conduct a microwave energy test  
Personal injury or in product damage.  
Approximately: 97.4 ohms  
2. Measure resistance. ( ohm meter scale:  
Rx1)  
) NO CONTINUITY  
L
N
DOOR  
OPEN  
High voltage components  
Primary  
Interlock  
Switch  
Door  
Sensing  
Switch  
Monitor  
Interlock  
Switch  
L
N
Transformer  
1. Remove wire leads.  
2. Measure resistance .( ohm meter scale: Rx1)  
Secondary  
Terminal  
Filament  
Terminals  
DOOR  
CLOSE  
Approx. 0.334+2% ohm.  
Approx. 118.7+2% ohm.  
0 ohm..  
Primary winding  
Secondary winding  
Filament winding  
Primary  
Interlock  
Switch  
Door  
Sensing  
Switch  
Monitor  
Interlock  
Switch  
3. Measure resistance .( ohm meter scale: Rx1000)  
Primary winding to ground  
Normal: Infinite.  
Normal: Infinite.  
Filament winding to ground  
Primary  
Terminal  
Note: These Diagrams are not intended to show a complete circuit, they represent the position of switches  
during “DOOR OPEN” and “DOOR CLOSED”. (continuity checks only)  
1. Remove wire leads. Install the magnetron seal in the  
correct position .Check that the seal is in good condition.  
2. Measure resistance .( ohm meter scale: Rx1)  
Magnetron  
Cooling  
Fins  
OUTPUT POWER OF MAGNETRON  
Filament winding  
Normal: Less than 1 ohm  
Normal: Infinite.  
CAUTION MICROWAVE RADIATION  
3. Measure resistance .( ohm meter scale: Rx1000)  
Filament to chassis  
PERSONNEL SHOULD NOT ALLOW EXPOSURE TO MICROWAVE RADIATION FROM MICROWAVE  
GENERATOR OTHER PARTS CONDUCTING MICROWAVE ENERGY.  
Capacitor  
The output power of the magnetron can be measured by performing a water temperature rise test.  
Equipment needed:  
* Two 1-liter cylindrical borosilicate glass vessel (Outside diameter 190 mm)  
* One glass thermometer with mercury column  
1. Remove wire leads.  
Normal:  
2. Measure resistance .( ohm meter scale: Rx1000)  
Terminal to terminal  
Momentarily indicates several  
ohm, and then gradually  
returns to infinite.  
NOTE: Check line voltage under load. Low voltage will lower the magnetron output.  
Make all temperature and time tests with accurate equipment.  
1. Fill the one liter glass vessel with water.  
Terminal to case  
Normal: Infinite.  
_
+
2. Stir water in glass vessel with thermometer, and record glass vessel’s temperature (“T1”, 10 1 C).  
Diode  
3. After moving the water into another glass vessel, place it in the center of the cooking tray.  
Set the oven to high power and operate for 47 seconds exactly.  
( 3 seconds included as a holding time of magnetron oscillation)  
4. When heating is finished, stir the water again with the thermometer and measure the temperature ( “T2”).  
5. Subtract T1 from T2. This will give you the water temperature rise. ( T )  
6. The output power is obtained by the following formula;  
1. Measure continuity. Forward .( ohm meter scale: Rx1000)  
Normal: Continuity.  
Abnormal: Infinite.  
Some inexpensive  
Meters may indicate  
Infinite resistance in  
both directions  
Normal: Infinite.  
Abnormal: Continuity.  
2. Measure continuity. Reverse .( ohm meter scale: Rx1000)  
Output =  
4.187x1000x T+0.55xMcx(T2-T0)  
42  
45 : Heating Times (sec)  
( 3 seconds included as a holding time  
of magnetron oscillation.)  
4.187 : Coefficient for water  
1000 : Water ( cc )  
1. Remove wire leads.  
2. Measure resistance .( ohm meter scale: Rx1)  
Ventilation Motor  
Approximately 35.2 ohms  
2 level: White and Blue wire  
T : Temperature Rise (T2-T1)  
T0 : Room Temperature  
Mc : Cylindrical borosilicate glass weight  
7. Normal temperature rise for this model is 9.9 C to 10.3 C at ‘HIGH’.  
NOTE 1: Variations or errors in the test procedure will cause a variance in the temperature rise.  
Additional power test should be made if temperature rise is marginal.  
NOTE 2: Output power in watts is computed by multiplying the temperature rise (step 5) by a factor  
of 91 times the of centigrade temperature.  
p/n 316495069  
 

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