Sharp CAROUSEL R-190HW Manuale di servizio supplementare - Pagina 8

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R - 1 9 0 H K
R-190HW
PROCEDURE
LETTER
J
KEY UNIT TEST
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. Using an ohmmeter and referring to the key unit matrix indicated on the control unit circuit, check the
circuit between the pins of the key unit that correspond to the STOP/CLEAR pad. When the pad is
pressed, the ohmmeter should indicate short circuit. When the pad is released, the ohmmeter should
indicate open circuit. If incorrect readings are obtained, the key unit is faulty and must be replaced.
About the other pads, the above method may be used.
5. Reconnect all leads removed from components during testing.
6. Re-install the outer case (cabinet).
7. Reconnect the power supply cord after the outer case is installed.
8. Run the oven and check all functions.
TEST PROCEDURES
COMPONENT TEST
G 7
G 8
CASSEROLE
ROLLS&
G 9
MUFFINS
G10
Pin
Pin
NO. G1
NO. G10
Key unit ribbon cable
Key unit (Membrane Switch) front view
6
G 1
G 2
G 3
6
2
VEGETABLES
3
5
TIMER
0
CLOCK
9
8
G 4
G 5
G 6
FRESH
BEVERAGE
POPCORN
EXPRESS
POWER
4
DEFROST
LEVEL
STOP
1
SOUP
CLEAR
START
BAKED
7
MINUTE
POTATOES
PLUS