– 44 –
Microwave Oven Runs but Inadequate/No Heating
Note: Verify line voltage under full load.
Plug oven in, place test
load in oven, select
high power, turn oven
on, and check primary
volts to high-voltage
transformer (white and
black wires).
120 VAC present?
Check RY2 for 120 VAC
between black wire (to
transformer) and chassis
ground.
120 VAC present?
NO
Perform High-
Voltage
Transformer Test?
Pass test?
Does turntable
motor operate?
Open primary
interlock switch
circuit.
YES
Replace high-voltage
transformer.
Perform High-
Voltage Capacitor
Test.
Pass test?
Replace capacitor.
Perform High-
Voltage Diode
Test.
Pass test?
Replace diode.
Perform
Magnetron Test.
Pass test?
Replace
magnetron.
System checks OK.
Repeat procedure.
NO
NO
YES
NO
Replace PCB.
NO
YES
Open black wire to
transformer or open
white wire from
transformer to neutral.
NO
NO
YES
YES
YES
YES
Summary of Contents for JKP18 Series
Page 47: ... 45 Schematics and Wiring Diagrams Models ZEK957 JKP56 and JKP45 Schematic ...
Page 48: ... 46 Model JKP27 Schematic ...
Page 49: ... 47 Models ZEK937 JKP18 and JKP15 Schematic ...
Page 50: ... 48 d Model JKS05 Schematic ...
Page 51: ... 49 Model JCKS05 Schematic ...
Page 52: ... 50 Models JCKP18 and JCKP15 Schematic ...
Page 53: ... 51 Model JKP85 Schematic ...
Page 54: ... 52 Microwave Schematic FAN THERM SW N O ...
Page 55: ... 53 Model ZEK957 Wiring Diagram ...
Page 56: ... 54 Model ZEK937 Wiring Diagram ...
Page 57: ... 55 Model JKP56 Wiring Diagram ...
Page 58: ... 56 Model JKP45 Wiring Diagram ...
Page 59: ... 57 Model JKP27 Wiring Diagram ...
Page 60: ... 58 Model JCKP18 Wiring Diagram ...
Page 61: ... 59 Model JKP18 Wiring Diagram ...
Page 62: ... 60 Model JCKP15 Wiring Diagram ...
Page 63: ... 61 Model JKP15 Wiring Diagram ...
Page 64: ... 62 Model JCKS05 Wiring Diagram ...
Page 65: ... 63 Model JKS05 Wiring Diagram ...
Page 66: ... 64 Model JKP85 Wiring Diagram ...
Page 67: ... 65 Microwave Wiring Diagram FAN THERMALSW N O ...
