Service manual

6-8
MW OVEN POWER OUTPUT TEST
The power output of the magnetron can be mea-
sured by the following tap water temperature rise
test.
NOTES:
Be sure oven cavity is clean and cool (not
used recently).
The magnetron output will be lower with lower
line voltages.
1. Fill a glass beaker with 10 oz. (300mL) of
tap water. Stir the water with a thermometer
(digital recommended) and record the tem-
p
erature. This starting temperature of the
water should be between 50°F and 75°F
(10°C and 24°C).
2. Place the beaker and water in the center
of the microwave oven. Operate on HIGH
power level for 30 seconds.
3. When the microwave oven is finished, stir the
thermometer through the water and record
the temperature.
4. Subtract the cold water temperature from
the warm water temperature to get the tem-
p
erature rise. Normal range is as shown in
the following table.
•
•
Voltage
(VAC under load)
Temperature Rise
120V 20-27°F (11-15°C)
108V 18-27°F (10-15°C)
RELAY LOGIC - LOWER OVEN
RELAY LOGIC - MICROWAVE OVEN
NORTENGAM
LLIRG
GNIR .VNOC
NAF .VNOC
NAFGNILOOC
ELBATNRUT
L
PMA
SUPERBA
MICROWAVES FULL PWR
MICROWAVES VAR. PWR
CUSTOM REHEA
T
CUSTOM DEFROST
SOFTEN/MELT
POPCORN
STEAM
CRISP
EASY CONVECT
COOL DOWN
OFF (DOOR CLOSED)
DOOR OPEN (COOL DOWN)
DOOR OPEN
SYALER
EKAB
LIORBNI
LIORBTUO
MELEVNOC
NAFVNOC
YALERBLD
TLNEVO
REWOLB
MODES
OFF
BAKE PRE-B
BAKE PRE-A
BAKE SS
CBAKE PRE-B
CBAKE PRE-A
CBAKE
SS
FBROIL PRE-B
FBROIL PRE-A
FBROIL S
S
INBROIL PRE-B
INBROIL PRE-A
INBROI
L SS
CBROIL PRE-B
CBROIL PRE-A
CBROI
L SS
CROAST PRE-B
CROAST PRE-A
CROAST
SS
BPROOF PRE-B
BPROOF PRE-A
BPROO
F SS
DEHYDR
ATE PRE-B
DEHYDR
ATE PRE-A
DEHYDR
ATE SS
CLEAN
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
H
ON (LOW SPEED)
ON (HIGH SPEED)
L
H
OFF
ON
CYCLING (MAX
PERIOD:
60 SEC.)
ON OR OFF
RELAY LOGIC KEY