LG MC-805A Service Manual page 19

Microwave/grill convection oven
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COMPONENTS
RELAY 3, 4, OF P.C.B
(Disconnect the 7 pin
connector from P.C.B)
See Schematic Dagram on
page 9)
RELAY 2, 3, 4 OF P.C.B
(Wire leads removed.)
RY2 : Microwave
RY3 : Grill
RY4 : Convection
MEMBRANE KEY
NOTE : A MICROWAVE ENERGY LEAKAGE TEST MUST ALWAYS BE PERFORMED WHEN THE UNIT IS
SERVICED FOR ANY REASON.
MAKE SURE THE WIRE LEADS ARE CORRECT POSITION.
WHEN REMOVING THE WIRE LEAD FROM THE PARTS, BE SURE TO GRASP THE
CONNECTOR, NOT THE WIRES.
TEST PROCEDURE
1
CN2
3
5
7
Relay 3
Relay 3 Relay 4 Relay 2
Membrane
Panel
1
2
3
4
5
6
7
8
9
10
11
5-13
Cooking Start
Relay 4
Cooking Start
Check continuity between
switch terminals, by pressing an
appropriate pad on key board.
P.C.B
The contacts assignment of the
1
respective pads on the key
2
3
board is as shown left figures.
4
5
6
7
8
9
10
11
RESULTS
OFF
OFF

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