WARNING
1. High voltage is present at the output terminals of the High Voltage
Inverter (U) including aluminum heat sink during any cook cycle.
2. It is neither necessary nor advisable to attempt measurement of the
high voltage.
3. Before touching any oven components, or wiring, always unplug
the power cord and discharge the high voltage capacitors (see page
8).
5.1. Primary, Secondary Latch
Switch interlocks & Power
Relay RY1
1. Unplug lead connectors to Power Relay RY1 and verify
open circuit of the Power Relay RY1 1-2 terminals.
2. Unplug lead connectors to Primary Latch Switch and
Secondary Latch Switch.
3. Test the continuity of switches at door opened and closed
positions with ohm meter (low scale).
Normal continuity readings should be as follows.
Door Closed
Door Opened
Primary Latch Switch
0
Ω
(Close)
Ω
(Open)
Secondary Latch Switch
0
Ω
(Close)
Ω
(Open)
Power Relay RY1
Ω
(Open)
Ω
(Open)
5.2. Short Switch
1. Unplug lead wires from Inverter Power Supply (U) primary
terminals.
2. Connect test probes of ohm meter to the disconnected
leads that were connected to Inverter Power Supply (U).
3. Test the continuity of short switch with door opened and
closed positions using lowest scale of the ohm meter.
Normal continuity readings should be as follows.
Door Opened
Door Closed
0
Ω
(Close)
Ω
(Open)
5.3. Magnetron
Continuity checks can only indicate an open filament or a
shorted magnetron. To diagnose for an open filament or
shorted magnetron.
1. Isolate magnetron from the circuit by disconnecting the
leads.
2. A continuity check across magnetron filament terminals
should indicate one ohm or less.
3. A continuity check between each filament terminal and
magnetron case should read open.
5.4. key board membrane
(Membrane switch assembly)
Check continuity between switch terminals, by tapping an
appropriate pad on the key board. The contacts assignment of
the respective pads on the key board is as shown in digital
programmer circuit.
5 COMPONENT TEST PROCEDURE
16
NN-GD462M / NN-GD452W / NN-GT462M
Содержание NN-GD452W
Страница 2: ...2 NN GD462M NN GD452W NN GT462M ...
Страница 3: ...3 NN GD462M NN GD452W NN GT462M ...
Страница 5: ...1 SCHEMATIC DIAGRAM 5 NN GD462M NN GD452W NN GT462M ...
Страница 24: ...8 EXPLODED VIEW AND PARTS LIST 8 1 EXPLODED VIEW 24 NN GD462M NN GD452W NN GT462M ...
Страница 31: ...9 DIGITAL PROGRAMMER CIRCUIT 9 1 SCHEMATIC DIAGRAM NN GD462M GD452W 31 NN GD462M NN GD452W NN GT462M ...
Страница 32: ...32 NN GD462M NN GD452W NN GT462M ...
Страница 33: ...9 2 SCHEMATIC DIAGRAM NN GT462M 33 NN GD462M NN GD452W NN GT462M ...
Страница 34: ...34 NN GD462M NN GD452W NN GT462M 02 12 S 9X7 S 9X8 Printed in China ...
