21
R-1850
R-1851
To protect the electronic circuits, this model is provided with a fine foil pattern added to the primary on
the PWB, this foil pattern acts as a fuse. If the foil pattern is open, follow the troubleshooting guide given
below for repair.
Problem: POWER ON, indicator does not light up.
STEPS
OCCURRENCE
CAUSE OR CORRECTION
1
The rated voltage is not applied between Pin
Check supply voltage and oven main unit.
No. 5 of the 3-Pin connector (A) and the
terminal of the relay RY1.
2
The rated voltage is applied to primary side
Power transformer or secondary circuit defective.
power transformer.
Check and repair.
3
Only pattern at "a" is broken.
*Insert jumper wire (J1) and solder.
4
Pattern at "a" and "b" are broken.
*Insert the coil RCILF2003YAZZ between "c" and "d".
NOTE: *At the time of making these repairs,
make a visual inspection of the
varistor. check for burn damage and
examine the transformer with an ohm-
meter for the presence of a layer
short-circuit (check primary coil re-
sistance which is approxmately 195
Ω
±
15%). If any abnormal condition is
detected, replace the defective parts.
TEST PROCEDURES
PROCEDURE
LETTER
COMPONENT TEST
T1
CN - B
a
b
c
d
CN - A
VRS1
P
(J1)
C100
RY1
AC (N)
MOTOR
CAPACITOR
2
1
3
5
1
4. Touch " START " pad.
5. The oven will operate as follows.
MENU
WEIGHT
1ST STAGE
2ND STAGE
3RD STAGE
(LBS)
LEVEL
TIME
LEVEL
TIME
LEVEL
TIME
CHICKEN
0.5
70%
28sec.
50%
5sec.
30%
1min.28sec.
PIECES
6. If improper operation is indicated, the control unit is probably defective and should be checked.
U
PROCEDURES TO BE TAKEN WHEN THE FOIL PATTERN ON THE PRINTED WIRING BOARD
(PWB) IS OPEN
V
AH SENSOR TEST
Checking the initial sensor cooking condition
(1) The oven should be plugged in at least five minutes before sensor cooking.
(2) Room temperature should not exceed 95˚F(35˚C).
(3) The unit should not be installed in any area where heat and steam are generated. The unit should
not be installed, for example, next to a conventional surface unit. Refer to the " INSTALLATION
Instructions ".
(4) Exhaust vents are provided on the back of the unit for proper cooling and air flow in the cavity. To
permit adequate ventilation, be sure to install so as not to block these vents. There should be some
space for air circulation.
(5) Be sure the exterior of the cooking container and the interior of the oven are dry. Wipe off any moisture
with a dry cloth or paper towel.
(6) The Sensor works with food at normal storage temperature.For example, chicken pieces would be
at refrigerator temperature and canned soup at room temperature.
(7) Avoid using aerosol sprays or cleaning solvents near the oven while using Sensor settings. The
