18
R - 4 2 6 H S
R - 4 2 6 H K
R -426HW
TEST PROCEDURES
PROCEDURE
LETTER
COMPONENT TEST
RELAY SYMBOL
OPERATIONAL VOLTAGE
CONNECTED COMPONENTS
RY1
Approx. 24.0V D.C.
Oven lamp / Turntable motor / Cooling fan motor
RY2
Approx. 24.0V D.C.
Power transformer
8. Disconnect the power supply cord, and then remove outer case.
9. Open the door and block it open.
10. Discharge high voltage capacitor.
11. Reconnect all leads removed from components during testing.
12. Re-install the outer case (cabinet).
13. Reconnect the power supply cord after the outer case is installed.
14. Run the oven and check all functions.
L
DEFROST TEST
WARNING : The oven should be fully assembled before following procedure.
(1) Place one cup of water in the center of the turntable tray in the oven cavity.
(2) Open the door.
(3) Touch the " STEAKS / CHOPS " pad once.
(4) Close the door.
(5) Touch the "START " pad.
(6) The oven is in Defrost cooking condition.
(7) The oven will operate as follows
MENU
1ST STAGE
2ND STAGE
3RD STAGE
STEAKS/CHOPS
LEVEL
TIME
LEVEL
TIME
LEVEL
TIME
0.5lb
60%
20sec.
40%
20sec.
30%
45sec.
(8) If improper operation is indicated, the control unit is probably defective and should be checked.
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.
1. Foil pattern check and repairs.
1)
Disconnect the power supply cord, and then remove outer case.
2) Open the door and block it open.
3) Discharge high voltage capacitor.
4) Follow the troubleshooting guide given below for repair.
STEPS
OCCURRENCE
CAUSE OR CORRECTION
1
Only pattern at "a" is broken.
*Insert jumper wire J1 and solder.
2
Pattern at "a" and "b" are broken.
*Insert the coil RCILF2003YAZZ between "c" and "d".
5) Make a visual inspection of the varistor.
Check for burned damage and examine the
transformer with a tester for the presence of
layer short-circuit (check the primary coil
resistance which is approximately 212ý ±
10%). If any abnormal condition is detected,
replace the control unit assembly.
6) Reconnect all leads removed from
components during testing.
7) Re-install the outer case (cabinet).
8) Reconnect the power supply cord after the
outer case is installed.
9) Run the oven and check all functions.
M
FOIL PATTERN ON THE PRINTED WIRING BOARD TEST
RY
2
VRS1
L1
J1
a
b
c
d
