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RS2100005 Rev 0
28
Troubleshooting Procedures
Unit does not heat even if
display counts down
when START pad is
pressed for high power.
Check the contacts
of RY2 relay.
Does relay
contacts
measure correct
resistance.
Verify proper
connection of
ribbon
connector.
NO
YES
Unit operates.
Replace
circuit
board.
Does ribbon
connector
have proper
connection.
Replace
circuit
board.
Reconnect
ribbon connector
for proper
connection.
YES
NO
Unit does not heat even if
display counts down
when START pad is
pressed for high power.
Measure resistance of
high voltage transformer.
Refer to Testing
Procedures on page 21.
Does
transformer have
the correct
resistance.
Replace
high
voltage
diode.
NO
YES
Unit operates.
Does
capacitor
have correct
resistance.
Measure
resistance of high
voltage diode.
Refer to Testing
Procedures on
page 21.
Replace
high voltage
transformer.
YES
NO
Does diode
have correct
resistance
Replace
magnetron.
NO
Replace
high voltage
transformer.
Measure
resistance of high
voltage capacitor.
Refer to Testing
Procedures on
page 21.
YES