©2002 Maytag Appliances Company
16021520 Rev. 0
19
CAUTION
!
All repairs as described in this section are to be performed only after the listed caution procedures listed below
have been followed.
• Check grounding before checking for trouble.
• Be careful of the high voltage circuit.
• Discharge high voltage capacitor by shorting across terminals with screwdriver.
• When checking the continuity of the switches or the high voltage transformer, disconnect one lead wire from
these parts and then check continuity with the AC plug removed. To do otherwise may result in a false reading
or damage to your meter.
• Do not touch any parts of the circuitry on the digital programmer circuit since static electric discharge may
damage this control panel. Always touch yourself to ground while working on this panel to discharge any static
charge in your body.
• 120 VAC is present in the digital programmer circuit (Terminals of power relay B and primary circuit of low
voltage transformer). When trouble shooting, be cautious of possible electrical shock hazard.
Use of the Schematic and/or Wiring Diagrams will assist the technician on the following component checks.
An Ohmmeter is required for most tests with a Multiplier Scale of X 1OK (k - thousand ohms). Test procedures will
be found elsewhere in this manual.
Troubleshooting Guide
Condition
Possible Causes
1. No voltage at outlet.
•
Line fuse open (external). Check for overload circuit.
2. Voltage available to outlet. No components
operating (including oven light).
•
Open power cord.
•
Failed terminal and/or wiring.
•
Open line fuse. See Condition # 3.
•
Open cavity thermal fuse.
•
Open magnetron TCO.
•
Interlock switch contacts open.
•
Inoperative p.c. board or electro-mechanical timer.
3. Internal 20, 25 or 30 amp line fuse open.
NOTE:
If line fuse is open, the interlock switch
assembly must be replaced, even if
another component caused the fuse to
open.
Warranty claims involving fuse
replacement will only be paid if switch
assembly is replaced along with the
fuse.
1. Failed terminal and/or wiring in 120 volt circuit of unit.
2. Shorted component in 120 volt circuit of unit.
3. Interlock switch assembly (test).
4. Replace fuse, if fuse blows quickly DO NOT proceed
with step 5: recheck steps 1, 2, and 3.
5. Check amperes and/or wattage compare to
Specifications Sheet (page 9).
6. If fuse blows after running a few seconds, disconnect
power cord, disconnect and tape apart high voltage
transformer primary wires, reconnect power cord.
7. If fuse does not open, disconnect power cord, and
check H.V. components and wiring.
8. If fuse opens, check 120 volt section for loose
connections or grounded wires. The timer, light and
motor by themselves draw less than 1 Ampere. If the
unit opens a fuse while the transformer is
disconnected, there are usually burned areas visible.
NOTE:
When taking voltage measurements to the transformer the 120 V supply leads must be connected to the
transformer terminals. The Voltage reading should then be taken with the voltmeter leads also connected to
these terminals.
Summary of Contents for 1324704M
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