INDUCTION COOKERS - SERVICE PROCEDURES AND ADJUSTMENTS
18
TRANSFORMER TEST
WARNING: UNPLUG UNIT BEFORE SERVICING.
1.
Remove inverter coil as outlined in “INVERTER
COIL”.
2.
Remove high voltage board as outlined in
“HIGH VOLTAGE BOARD”.
3.
Unplug transformer secondary from plug WF1
on the low voltage board.
4.
Remove leads connected to AC terminals
which are next to transformer primary plug
CN101 on the EMI board.
WARNING: THE FOLLOWING STEPS REQUIRE
POWER TO BE APPLIED TO THE UNIT DURING
TEST. USE EXTREME CAUTION AT ALL TIMES.
5.
Apply power to unit and check voltage at
transformer secondary plug as shown in
diagram.
6.
If test is not correct, replace the transformer.
7.
Assemble in reverse order.
ELECTRICAL OPERATION
COMPONENT FUNCTION
Controller Board . . . . . . . . .
Inputs to the low voltage board to turn unit on or off and select cooking level.
Led . . . . . . . . . . . . . . . . . . . .
Installed on controller board and displays cooking level.
Inverter Assembly . . . . . . . .
Receives signal from controller board to produce energy for cooking.
EMI Board . . . . . . . . . . . . . .
Supplies voltage to the high voltage board.
Low Voltage Board . . . . . . .
Controls high voltage board based on input from controller board.
High Voltage Board . . . . . . .
Supplies power to the inverter coil for cooking. Supplies power to the cooling
fans.
Fans . . . . . . . . . . . . . . . . . . .
Circulate air to cool interior components.
Thermistor . . . . . . . . . . . . . .
Measures cooktop temperature.
Transformer . . . . . . . . . . . . .
Supplies power to the memory board.
Fuse . . . . . . . . . . . . . . . . . . .
Protects circuitry on EMI board.
