Compu Defrost Test; Key Unit Test - Sharp R-530BK Service Manual

R-530BK
R-530BW
Procedure Letter Component Test
J Compu Defrost Test
1. Place one cup of water in the center of the turntable tray in the oven cavity.
2. Close the door, touch the"COMPU DEFROST" pad twice and touch the number pad "I", and touch
the number pad "5". Then touch the "START" pad.
3. The oven is in "COMPU DEFROST" cooking mode.
4. The oven will operate as follows:
Weight 1st Stage
Level
Time
2nd Stage
Level Time
3rd Stage
Level
Time
4th Stage
Level Time
0.5 ( 70% ( 47 sec. ( 0% 1 52 sec. ( 50% ( 32 sec. ( 30% / 40 sec.
5. If improper operation is indicated, the control unit is probably defective and should be checked.
K
.
Key Unit Test
1. Disconnect the power supply cord, and then remove outer case cabinet.
2. Open the door and block it open.
3. Discharge the high voltage capacitor.
4. If the display fails to clear when the STOP/CLEAR pad is depressed, first verify the flat ribbon is
making good contact and verify that the door sensing switch operates properly (contacts are
closed when the door is closed and open when the door is open). If the door sensing 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 connector).
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.lf a specific pad does not respond, the above method
may be used (after clearing the control unit) to determine if the control unit or pad is at fault.
5. Reconnect all leads removed from components during testing.
6. Re-install the outer case cabinet.
7. Reconnect the power supply cord after installing the outer case cabinet
8. Run the oven and check all functions.
G8
G7 G6 G5 G4 G3 G2 Gl
Z!
5
4
3
2
1
Popcorn
Custom
Reheat
Help
0
i?
0
9 8
7
Fresh
6
Baked
KITCHEN
potato
vegetables
TIMER
Minute
Compu
Fish/
Frozen
Ground
POWER
g
Plus Defrost seafood
vegetables
Poultry
meat
LEVEL
cv
Start Frozen Beverage Frozen
stop
6
Touch
Clock
snacks center
Rice
Compu
Cook
main dish
Clear
KEY UNIT
18
. .