NN-CT890SBPQ
3
2 Inverter Warning
The inverter board looks like a regular PCB, however, this PCB
drives the magnetron tube using very high voltages and cur-
rent.
It has
1. Very high voltage and high current
2. An Aluminium heat sink that becomes very hot
3. The capacitors on the inverter circuit will contain a high
voltage charge even when the oven is not operating.
Do not
1. Do not touch the circuitry as it contains very high volt-
ages. When replacing the board please take extreme
care to avoid possible electric shock. High voltages may
remain in the circuit.
2. Do not touch the aluminium heat sink as it will become
very hot. It also contains high voltages.
3. Do not attempt to repair the inverter PCB as this can be
very dangerous. Replace the high voltage inverter circuit
as a complete unit.
Return the old unit fully repacked
in the original shipping box and completed paper
work.
4. Do not adjust or tamper with the preset volume on the
inverter board. It is very dangerous to adjust this preset
without proper test equipment.
5. Do not test the oven while the inverter grounding strip or
screws are loose. It is very dangerous to operate the
inverter circuit board without a proper ground connection.
Inverter Grounding
Figure 1
Inverter PCB layout
Figure 2
3 Feature Chart
Function
BPQ
Microwave
6
Grill
3
Convection
17
Combi
Yes
Sensor Reheat
0
Sensor Cook
5
Sensor Combi
8
Sensor Crisp
-
Weight Defrost
3
Weight Combi
5
Weight Reheat
-
Weight Cook
-
Memory Cook
3
Weight Crisp
-
Stage Cooking
3 stage
Delay / Stand
Yes
More / Less
Yes
Kg -> lb/oz
Yes
Clock
24H
Word Prompt
English
Step by Step
LED
Содержание NN-CT890SBPQ
Страница 10: ...NN CT890SBPQ 10 6 Schematic Diagram ...
Страница 11: ...NN CT890SBPQ 11 7 Wiring Diagram Wiring Harness ...
Страница 15: ...NN CT890SBPQ 15 8 5 1 convection and microwave duty cycles Figure 1 ...
Страница 16: ...NN CT890SBPQ 16 8 5 2 grill and microwave duty cycles Figure 2 ...
Страница 26: ...NN CT890SBPQ 26 Removing the screws holding the grill heater Figure 11 Removing the grill element Figure 12 ...
Страница 28: ...NN CT890SBPQ 28 Removing the oven back plate Figure 14 Removing the base plate Figure 15 ...
Страница 29: ...NN CT890SBPQ 29 Removing the circulation motor Figure 16 ...
Страница 33: ...NN CT890SBPQ 33 13 Troubleshooting Guide ...
Страница 34: ...NN CT890SBPQ 34 Fuses are not blown Fuses are blown Checking the semiconductors using a resistance meter ...
Страница 36: ...NN CT890SBPQ 36 14 Exploded View ...
Страница 44: ...NN CT890SBPQ 44 20 Digital Programmer Circuit ...