Fuse, Primary Interlock Test - GE SpaceMakerXL JMV1420 Technical Service Manual

3. If the door is opened, and the primary interlock switch and
power relay contacts fail to open, the monitor fuse blows
simultaneously with closing of the monitor switch contacts.
CAUTION: Before replacing a blown monitorfuse, test the
primary interlock switch, door sensing switch, monitor switch
andpower relay contactsfor proper operation.
MONITOR/LINE FUSE
The fuse is an internal 20A fuse, see mini manual for test
procedure.
CAUTION: Before replacing a blown monitorfuse, test the
primary interlock switch, door sensing switch, monitor switch
andpower relay contacts for proper operation. If the
monitorfuse is blown by improper switch operation,
monitorfuse and switch must he replaced even if the monitor
switch operates normally.
PRIMARY INTERLOCK SYSTEM TEST
Disconnect the oven from power supply.
Door Sensing Switch
Isolate the switch and connect the ohmmeter to the common
(COM.) and normally open (NO) terminal of the switch, the
meter should indicate an open circuit with the door open and
a closed circuit with the door closed. If improper operation is
indicated, replace the door sensing switch.
Power Relay
Disconnect two (2) wire leads (plastic - squeeze) from the
male tab terminals on the printed wiring circuit board pro-
vided in the control panel assembly. The tab terminals are
located in the area of the circuit board on the component
side, and are connected to the contacts of the power relay.
Check the state of the relay contacts using an ohmmeter.
The relay contacts should be open. If the relay contacts are
closed, replace the circuit board entirely.
Primary Interlock Switch Test
Isolate the switch and connect the ohmmeter to the common
(COM.) and normally open (NO) terminal of the switch. The
meter should indicate an open circuit with the door open and
a closed circuit with the door closed. If improper operation is
indicated, replace the primary interlock switch.
20 AMP FUSE
DOOR SENSING SWITCH
*DOOR CLOSED 0 Ω
*DOOR OPEN
MONITOR SENSING SWITCH
NOTE: REMOVE WIRES TO CHECK
CONTINUITY
17
MICROPHONE
Ω
*DOOR CLOSED
*DOOR OPEN 0 Ω
PRIMARY SWITCH
*DOOR CLOSED 0 Ω
*DOOR OPEN
Ω
Ω