2
S
S
A
A
F
F
E
E
T
T
Y
Y
P
P
R
R
E
E
C
C
A
A
U
U
T
T
I
I
O
O
N
N
S
S
PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING
TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE
ENERGY
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 operation
(2). Proper door closing
(3). Seal and sealing surfaces (arcing, wear, and other damage).
(4). Damage to or loosening of hinges and latches.
(5). Evidence of dropping or abuse.
C.
Before turning on microwave power for any service test or inspection within the microwave
generating compartments, check the magnetron, wave guide or transmission line, and cavity for
proper alignment, integrity, and connections.
D.
Any defective or misaligned components in the interlock, monitor, door seal and microwave
generation and transmission systems shall be repaired, replaced, or adjusted by procedures
described in this manual before the oven is released to the owner.
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.
Operate the oven from a properly grounded AC outlet capable of supplying 230 volts.
THIS MANUAL, AS WELL AS THE INFORMATION CONTAINED IN IT, IS TO BE USED ONLY BY AN
AUTHORIZED SERVICE TECHNICIAN FAMILIAR WITH AND KNOWLEDGEABLE OF PROPER
SAFETY AND SERVICING PROCEDURES AND POSSESSING HIGH QUALITY TEST EQUIPMENT
ASSOCIATED WITH MICROWAVE AND ELECTRICAL APPLIANCE REPAIR.
ALL INDIVIDUALS WHO ATTEMPT REPAIRS BY IMPROPER MEANS OR ADJUSTMENT SUBJECT
THEMSELVES AND OTHERS TO THE RISK OF SERIOUS OR FATAL INJURY.
1
1
T
T
H
H
E
E
H
H
E
E
A
A
T
T
I
I
N
N
G
G
P
P
R
R
I
I
N
N
C
C
I
I
P
P
L
L
E
E
O
O
F
F
M
M
I
I
C
C
R
R
O
O
W
W
A
A
V
V
E
E
Microwave is one kind of radio wave whose wavelength is very short, frequency is very high. Therefore, it is
called ultrahigh frequency electromagnetic wave. Microwave can heat food mainly result in the mutual affect of
the food in the microwave field and the microwave field itself.
Under the affect of microwave field, the thermal effect mechanism produced from the mutual affect of the
microwave and the food includes two aspects. One is Dielectric loss of polar molecule; the other is conductive
