MICROWAVE OVEN TECH SHEET. CAUTION. Disconnect from Electrical Supply
Before Servicing Unit. PRECAUTIONS TO BE OBSERVED BEFORE AND.
MICROWAVE OVEN TECH SHEET
Schematic Diagram Warning : Power must be disconnected before servicing this appliance MODEL NO. : (C)/FMV152K; C/FFMV162L;C/FFMV164L
BR:BROWN WH:WHITE BK:BLACK
RD:RED BL:BLUE
GY:GREY
GN:GREEN
PK:PINK
MODEL NO. : (C)/FMV152K; C/FFMV162L;C/FFMV164L
YW-32
OG:ORANGE BR:BROWN YW:YELLOW
YW-32
BK-17
WH-31
2 BK
1 BK
GN
12
T/TABLE MOTOR
WH-15
WH:WHITE
RD:RED
BK:BLACK
BL:BLUE
GY:GREY PK:PINK
GN:GREEN
WH-15 BK-24
GN-23
OG-18
YW-6 BK-17 WH-16
RD-5
1
30 WH
3 BK
6
BOTTOM THERMAL CUT-OUT (1 20/0) 4 BK
L
H.V.CAPACITOR VENT MOTOR
19 YW
COOKTOP LAMP
OG-27
WH-12 POWER RELAY
WH FA
H.V.DIODE BK-1
MGT TUBE
F
CAVITY THERMOSTAT
BK-2
RD
POWER CORD H.V.TRANS
BK-2
20 BL
5 RD
1
RD
RD
BL-25
BK-10
MGT THERMOSTAT
BK-3
WH-9
BK-8
WH-11
17 BK
BK
WH
HOOD THERMOSTATA
OG-27
WH
BK
WH-12
BK-1
GN-28
YW-6
BK-8
BK-4
15 WH
YW-7
6 YW
16 WH
TTM
18 OG
FM
4
OUT
8 BK
12 WH
POWER RELAY (RELAY 2)
PRIMARY SWITCH
PRIMARY INTERLOCK ( UPPER)
7 YW
H.V.DIODE
10 BK
MAGNETRON THERMOSTATA
BK
GY-26 BK-24
FAN MOTOR
SUB RELAY (RELAY 1)
BOTTOM THERMOSTAT
BK-4
BK-10
PCB
WH
L 120V OVEN LAMP
YW-29
22 BR
3
BK-3
120V TURNTABLE MOTOR
H.V.CAPACITOR
MAGNETRON
COOKTOP LAMP
GND
CONTROL P.W.B. ASS'Y
OVEN LAMP
YW-21
YW-29
21 YW
23 GN
LAMP RELAY
NOISE FILTER
YW-19
GN-23
WH-30
L.V.T
MOTOR CONDENSER
BL-20
GN-28
ON (RY3)
Parts Layout OVEN THERMOSTAT
OVEN LAMP
BR-22 MGT THERMAL CUT-OUT (1 60/95)
29 YW
9
MOTOR CAPACITOR
8
OG-18
L
VENT MOTOR
PARTS LEADS
BL-20 28 GN
24 BK
LOW (RY4)
7
HARNESS LEADS
FAN MOTOR
WH-16
GY-26
HOOD THERMAL CUT-OUT (40/70) 27 OG
25 BL
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.
GROUND
YW-7
BL-25
T.P.
26 GY
HI (RY5)
designed in this manual before the oven Is released to the owner.
T/TABLE MOTOR
DOOR SENSING SWITCH
WH-31 CAVITY THERMAL CUT-OUT (1 10/0)
VENT MOTOR
VENT RELAY
and latch. 5. Evidence of dropping or abuse. C. Before turning on microwave power for any service test or inspection within the microwave generating compartments.
YW:YELLOW
check the magnetron. Waveguide or transmission line. And cavity for proper alignment, integrity and connection. D. Any detective or mis-adjusted components in the interlock, monitor, door seal, and microwave generation and transmission systems shall be repaired. replaced. or adjusted by producers.
WH
OG:ORANGE
A. Do not operate or allow the oven to be operated with the door open. 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.) 4. Damage to or loosening of hinges
POWER SUPPLY : FILTER ASS'Y SINGLE PHASE ONLY FUSE BK
GN
PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO AVOID PROSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY
Warning : Power must be disconnected before servicing this appliance
WH-11
Disconnect from Electrical Supply Before Servicing Unit
WH-9
CAUTION
Wiring Diagram
MONITOR SWITCH
MOTOR CONDENSER
IN
NOISE FILTER
MONITOR INTERLOOK SWITCH
9 WH
11 WH
H.V.TRANSFORMER MONITOR SWITCH
FAN MOTOR
32 YW
BOTTOM THERMOSTAT
DOOR SENSE SWITCH (BOTTOM)
FA
DOOR SENSING SWITCH
Made in china
31 WH
HOOD THERMOSTAT PRIMARY SWITCH
NOTE: For servicing replacement use 16GA,105 C thermoplastic covered wire
H.V. TRANS
11
except for high voltage leads or as noted on special leads.
F
12
COOK TOP LAMPS
H.V. CAPACITOR
MAGNETRON H.V.DIODE
NOTE: Door is open
Switch Chart
Component tests Other component tests
SWITCH
DOOR
CHECK BY Disconnect the wires at the Primary Interlock Switch. Check from the common terminal to the normally opened terminal.
_
Door sensing Disconnect the wires at the sensing interlock Switch. Check from the common terminal and Interlock Normally closed terminal
_
Primary Interlock
Monitor Interlock
Disconnect the wires at the Monitor Switch. Check from the common terminal and Normally closed terminal .
WARNING
+
Personal injury/Product Hazard
_
( +) CONTINUITY _ ( ) NO CONTINUITY
Test
Components T/Table Motor
Disconnect the power supply cord after performing any test or repairs to the microwave. from the outlet before removing the outer cabinet from the unit. Check that all wire leads are in the Discharge the high voltage capacitor Correct position before operating and remove the lead wires from The microwave oven. The primary winding of the high voltage Grasp wire connectors when transformer before conducting any of removing the wire leads from microwave parts. the following tests. Conduct all operation tests with 1 liter Failure to follow these instructions may of water in the oven. result in electrical shock or other Conduct a microwave energy test Personal injury or in product damage.
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)
Primary Terminal
Magnetron
OUTPUT POWER OF MAGNETRON
Cooling Fins
CAUTION MICROWAVE RADIATION PERSONNEL SHOULD NOT ALLOW EXPOSURE TO MICROWAVE RADIATION FROM MICROWAVE GENERATOR OTHER PARTS CONDUCTING MICROWAVE ENERGY. 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 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. _ 1 C). 2. Stir water in glass vessel with thermometer, and record glass vessel’s temperature (“T1”, 10+ 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; 45 : Heating Times (sec) Output = 4.187x1000x T+0.55xMcx(T2-T0) ( 3 seconds included as a holding time 42 of magnetron oscillation.) 4.187 : Coefficient for water 1000 : Water ( cc ) 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.
Capacitor
1. Remove wire leads. 2. Measure resistance .( ohm meter scale: Rx1) Primary winding Secondary winding Filament winding 3. Measure resistance .( ohm meter scale: Rx1000) Primary winding to ground Filament winding to ground 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) Filament winding 3. Measure resistance .( ohm meter scale: Rx1000) Filament to chassis
1. Remove wire leads. 2. Measure resistance .( ohm meter scale: Rx1000) Terminal to terminal
Terminal to case Diode
1. Measure continuity. Forward .( ohm meter scale: Rx1000)
Some inexpensive Meters may indicate Infinite resistance in both directions
2. Measure continuity. Reverse .( ohm meter scale: Rx1000)
