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Tech Sheet

ManualsBrandsKitchenAid ManualsAppliances24 in. W 1.2 cu. ft. Under-Counter Microwave Drawer in Stainless Steel
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FOR SERVICE TECHNICIAN’S USE ONLY
NOTES:
■ Interlock and Montior switches cannot be adjusted and all these switches should be replaced if any one of them is found to be defective. After
replacing interlock/monitor switches, reconnect wires to switch and check for continuity.
■ These diagrams are not intended to show a complete circuit; they represent the position of switches during “DRAWER OPEN” or “DRAWER
CLOSED” (continuity checks only).
3
Parts Layout (not to scale)
(+) Continuity (-) No Continuity
NOTE: These diagrams are not intended to show a complete circuit; they represent the position of switches during “DRAWER OPEN” or
“DRAWER CLOSED” (continuity checks only).
Drawer Closed
Drawer Open
Drawer Closed
Drawer Open
1. Unplug microwave oven or disconnect power.
2. Hold the drawer in a closed position and then pull the drawer
open. This causes the latch leads to rise, making it possible
to hear a “click” as the drawer switches operate.
3. Visually check the drawer and cavity face plate for damage
(dents, cracks, signs of arcing, etc.).
4. Carry out any remedial work that is necessary before
operating the oven.
A. Cavity thermostat
B. Magnetron
C. Stirrer moto
r
D. Cavity light
E. Third drawer switch
F. Drawer sensing switch
G. Front drawer switch
H. H.V. capa
citor
I. H.V. diode
J. Rear drawer switch
K AC line filter
L. H.V. transformer
M. Secondary interlock switch
N. Monitor interlock switch
O. Cooling fan motor
Primary, Secondary, and Monitor Interlock Switch Checkout Procedures
Switch Check By Drawer Open Drawer Closed
Primary
Interlock
1. Unplug microwave oven or disconnect power.
2. Disconnect the wires at the Primary Interlock Switch.
3. Check the terminals.
-+
Secondary
Interlock
1. Unplug microwave oven or disconnect power.
2. Disconnect pin connector at the electronic control.
3. Check from the orange/black wire (pin 7) to the black/brown wire (pin 8).
-+
Monitor
Interlock
1. Unplug microwave oven or disconnect power.
2. Disconnect the common terminal (white/white wire) and the normally
closed terminal (red/brown wire).
3. Check the terminals.
+-
A
B
C
D
E
F
G
H
I
J
O
N
M
L
K
Monitor
Secondary
Interlock
Switch
(NC) (NO)(NO) (NC)(NO)
L
N
(NC)
(NC) (NO)(NO) (NC)(NO)
L
N
(NC)
Front
Drawer
Switch
Drawer
Sensing
Switch
Rear
Drawer
Switch
(COM) (NO) (COM) (NO)(NO)(COM)
Chassis
Ground
LSI
Front
Drawer
Switch
Drawer
Sensing
Switch
Rear
Drawer
Switch
(NO)
LSI
Chassis
Ground
(COM) (NO) (COM) (NO)(COM)
Primary
Secondary
Interlock
Switch
Interlock
Switch
Interlock
Switch
Monitor
Interlock
Switch
Primary
Interlock
Switch
3
Parts Layout (not to scale)
(+) Continuity (-) No Continuity
NOTE: These diagrams are not intended to show a complete circuit; they represent the position of switches during “DRAWER OPEN” or
“DRAWER CLOSED” (continuity checks only).
Drawer Closed
Drawer Open
Drawer Closed
Drawer Open
1. Unplug microwave oven or disconnect power.
2. Hold the drawer in a closed position and then pull the drawer
open. This causes the latch leads to rise, making it possible
to hear a “click” as the drawer switches operate.
3. Visually check the drawer and cavity face plate for damage
(dents, cracks, signs of arcing, etc.).
4. Carry out any remedial work that is necessary before
operating the oven.
A. Cavity thermostat
B. Magnetron
C. Stirrer moto
r
D. Cavity light
E. Third drawer switch
F. Drawer sensing switch
G. Front drawer switch
H. H.V. capa
citor
I. H.V. diode
J. Rear drawer switch
K AC line filter
L. H.V. transformer
M. Secondary interlock switch
N. Monitor interlock switch
O. Cooling fan motor
Primary, Secondary, and Monitor Interlock Switch Checkout Procedures
Switch Check By Drawer Open Drawer Closed
Primary
Interlock
1. Unplug microwave oven or disconnect power.
2. Disconnect the wires at the Primary Interlock Switch.
3. Check the terminals.
-+
Secondary
Interlock
1. Unplug microwave oven or disconnect power.
2. Disconnect pin connector at the electronic control.
3. Check from the orange/black wire (pin 7) to the black/brown wire (pin 8).
-+
Monitor
Interlock
1. Unplug microwave oven or disconnect power.
2. Disconnect the common terminal (white/white wire) and the normally
closed terminal (red/brown wire).
3. Check the terminals.
+-
A
B
C
D
E
F
G
H
I
J
O
N
M
L
K
Monitor
Secondary
Interlock
Switch
(NC) (NO)(NO) (NC)(NO)
L
N
(NC)
(NC) (NO)(NO) (NC)(NO)
L
N
(NC)
Front
Drawer
Switch
Drawer
Sensing
Switch
Rear
Drawer
Switch
(COM) (NO) (COM) (NO)(NO)(COM)
Chassis
Ground
LSI
Front
Drawer
Switch
Drawer
Sensing
Switch
Rear
Drawer
Switch
(NO)
LSI
Chassis
Ground
(COM) (NO) (COM) (NO)(COM)
Primary
Secondary
Interlock
Switch
Interlock
Switch
Interlock
Switch
Monitor
Interlock
Switch
Primary
Interlock
Switch
Drawer Closed
Drawer Open
1. Unplug microwave oven or disconnect power.
2. Hold the drawer in a closed position and then pull the drawer open.
This causes the latch leads to rise, making it possible to hear a
“click” as the drawer switches operate.
3. Visually check the drawer and cavity face plate for damage (dents,
cracks, signs of arcing, etc.).
4. Carry out any remedial work that is necessary before operating
the oven.
PRIMARY, SECONDARY, THIRD DOOR AND MONITOR INTERLOCK SWITCH CHECKOUT PROCEDURES
IMPORTANT: Before checking the interlock switches, unplug microwave oven or disconnect power. Be sure to disconnect all of the wires at the switch
being tested before making any continuity readings.
NOTES:
■ The Secondary Interlock Switch is mounted in the door lock switch cradle independent of the Monitor Interlock Switch and Primary Interlock
Switch.
■ Interlock and Monitor switches cannot be adjusted and all these switches should be replaced if any one of them is found to be defective. After
replacing interlock/monitor switches, reconnect wires to switch and check for continuity.
Switch Check By Door Open Door Closed
Primary Interlock 1. Unplug microwave oven or disconnect power.
2. Disconnect the wires at the Primary Interlock Switch.
3. Check the terminals.
4. Reconnect wires to switch.
- +
Secondary Interlock 1. Unplug microwave oven or disconnect power.
2. Disconnect the wires from Secondary Interlock Switch.
3. Check the terminals.
4. Reconnect wires to switch.
- +
Third Door Interlock 1. Unplug microwave oven or disconnect power.
2. Disconnect the wires from Third Door Interlock Switch.
3. Check the terminals.
4. Reconnect wires to switch.
- +
Monitor Interlock 1. Unplug microwave oven or disconnect power.
2. Disconnect the wires from Monitor Interlock Switch.
3. Check the terminals.
4. Reconnect wires to switch.
+ -
(+) Continuity (-) No Continuity
A. Cavity thermostat
B. Magnetron
C. Stirrer motor
D. Cavity light
E. Monitor switch
F. Secondary switch
G. H.V. capacitor
H. H.V. diode
I. Switching power supply
J. H.V transformer
K. Stop switch
L. Third door switch
M. AC line filter
N. Cooling fan motor
A
B
C
D
E
F
H
G
M
L
K
J
I
N
PARTS LAYOUT (NOT TO SCALE)