Service manual

16
R-630DK
R-630DW
R-630DS
K RELAY TEST
TEST PROCEDURES
PROCEDURE
LETTER
COMPONENT TEST
J KEY UNIT TEST
2-1 In connection with pads.
a) When touching the pads, a certain group of pads do not produce a signal.
b) When touching the pads, no pads produce a signal.
2-2 In connection with indicators
a) At a certain digit, all or some segments do not light up.
b) At a certain digit, brightness is low.
c) Only one indicator does not light.
d) The corresponding segments of all digits do not light up; or they continue to light up.
e) Wrong figure appears.
f) A certain group of indicators do not light up.
g) The figure of all digits flicker.
2-3 Other possible problems caused by defective control unit.
a) Buzzer does not sound or continues to sound.
b) Clock does not operate properly.
c) Cooking is not possible.
When testing and/or replacement is completed,
1) Disconnect the power supply cord, and then remove outer case.
2) To discharge the high voltage capacitor, wait for 60 seconds.
3) Re-install all removed parts.
4) Reconnect all leads removed from components during testing.
5) Re-install the outer case (cabinet).
6) Reconnect the power supply cord after the outer case is installed.
7) Run the oven and check all functions.
1. Disconnect the power supply cord, and then remove outer case.
2. To discharge the high voltage capacitor, wait for 60 seconds.
3. If the display fails to clear when the STOP/CLEAR pad is depressed, first verify the flat ribbon cable
is making good contact, verify that the door sensing switch (stop switch) operates properly; that is the
contacts are closed when the door is closed and open when the door is open. If the door sensing switch
(stop switch) is good, disconnect the flat ribbon cable that connects the key unit to the control unit and
make sure the door sensing switch is closed (either close the door or short the door sensing switch
connecter). Use the Key unit matrix indicated on the control panel schematic and place a jumper wire
between the pins that correspond to the STOP/CLEAR pad making momentary contact. If the control
unit responds by clearing with a beep the key unit is faulty and must be replaced. If the control unit does
not respond, it is faulty and must be replaced. If a specific pad does not respond, the above method
may be used (after clearing the control unit) to determine if the control unit or key pad is at fault.
4. Reconnect all leads removed from components during testing.
5. Re-install the outer case
(cabinet).
6. Reconnect the power
supply cord after the outer
case is installed.
7. Run the oven and check
all functions.
1. Disconnect the power supply cord, and then remove outer case.
2. Open the door and block it open.
3. To discharge the high voltage capacitor, wait for 60 seconds.
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.
G12 G11 G10 G 9
G 8 G 7 G 6 G 5 G 4 G 3 G 2 G 1
12345
67890
Super
Defrost
Compu
Defrost
Lunch on
the Run
Beverage
Center
Main
Entrees
Frozen
Foods
One Dish
Dinners
Breakfast
Bar
Popcorn
Power
Level
Minute
Plus
Custom
Hlep
Sensor
Reheat
STOP
Clear
Baked
Potatoes
Vegetables
Kitchen
Timer/Clock
START
Touch On