Panasonic NN-V359WB, Service Manual

Page: 16 / 32

16
7.5 Inverter Power Supply (U)
DO NOT try to REPAIR this H.V. Inverter power supply(U). Replace as whole H.V. Inverter(U) Unit.
7.6 Inverter Power supply(U)
See Troubleshooting of inverter circuit and magnetron on Pages
19 and 20 to determine if the inverter power supply is
functioning.
7.7 Temp sensor (Thermal protector)
A temp sensor is mounted on top of the oven cavity at the left
side. Its purpose is to automatically shut off the oven in case the
cavity overheats for any reason.
The thermal protector will shut the oven down when the
temperature of the cavity reaches 257°F (125°C).
The device is connected to the DPC on touch control models.
When the thermal protector exceeds its temperature it will turn
off the power to oven cavity and display will go to reset mode.
The cooking program can be reset after cool-down.
THERMISTOR RESISTANCE VALUE
30K-120K at 10°C-30°C (50°F-86°F)
HEAT SINK
CHOKE COIL
SAND BAR
CUSTOM I.C.
PHOTO COUPLER
CN 701
CURRENT TRANSFORMER
FILM CAPACITORS
PRIMARY WINDINGS
SECONDARY WINDINGS
HIGH VOLTAGE DIODES
CN 703
HIGH VOLTAGE CAPACITORS
INVERTER POWER SUPPLY DIAGRAM
(RECTIFIER BRIDGE)
RESISTOR
CN 702
HIGH VOLTAGE
TRANSFORMER
3
2
1
WARNING
Do not attempt to make any measurements in the high voltage
circuitry of the inverter or magnetron.
NEW H.V.
SCREW
TEMP SENSOR
02-042