18
R- 330DK
R-330DW
1ST STAGE
2ND STAGE
WEIGHT
LEVEL
TIME
LEVEL
TIME
0.5lb
70%
40sec.
40%
30sec.
(5) If improper operation is indicated, the control unit is probably defective and should be checked.
TEST PROCEDURES
PROCEDURE
LETTER
COMPONENT TEST
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 trans-
former with a tester for the presence of layer
short-circuit (check the primary coil resistance
which is approximately 212
Ω
±
10%). If any
abnormal condition is detected, replace the
defective parts.
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.
2. Follow the troubleshooting guide given below, if indicator does not light up after above check and
repairs are finished.
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) Disconnect the leads to the primary of the power transformer.
5) Ensure that these leads remain isolated from other components and oven chassis by using
insulation tape.
6) After that procedure, re-connect the power supply cord.
7) Follow the troubleshooting guide given below for repair.
STEPS
OCCURRENCE
CAUSE OR CORRECTION
The rated AC voltage is not present between
1
Pin No. 1 of the 2-pin connector (A) and the
Check supply voltage and oven power cord.
common terminal of the relay RY1.
2
The rated AC voltage is present at primary
Low voltage transformer or secondary circuit defective.
side of low voltage transformer.
Check and repair.
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.
M
FOIL PATTERN ON THE PRINTED WIRING BOARD TEST
RY1
VRS1
T1
RY3
(J1)
a
b
c
d
