LG MH-1355M Service Manual page 41

COMPONENTS
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
MEMBRANE
PANEL
1
2
3
4
5
6
7
8
9
10
11
12
CONNECTOR KEY MATRIX
6 5 4
AUTO HOLD
NC NC
COMBI WARM
7
NC FISH NC
8
POPCORN POULTRY NC
9
CONVE-
REHEAT MEAT START
CTION
10
NC 8 6
11
NC
9 7
12
– 41 –
Check continuity between switch
P C B
terminals, by pressing an appropriate
1
pad on the key board.
2
The contacts assignment of the
3
respective pads on the key board is
4
5 as shown left figures.
6
7
8
9
10
11
12
3 2 1
COMBI
NC
LOW
COMBI
NC TIME
HIGH
MICRO
NC CLOCK
TIME
MICRO STOP/
POWER CLEAR
4 2 0
5 3 1
Fig. 41
RESULTS