Panasonic NN-T559WB, Руководство по обслуживанию

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DANGER OF HIGH VOLTAGE AND HIGH TEMPERATURE (HOT/LIVE) OF THE INVERTER POWER SUPPLY(U)
WARNING
This service information is designed for experienced repair technicians only and is not designed for use by the general public. It does not contain
warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product. Products powered by electricity
should be serviced or repaired only by experienced professional technicians. Any attempt to service or repair the product dealt with in this service
information by anyone else could result in serious injury or death.
WARNING
* This product should be serviced only by trained, qualified personnel.
This service manual covers products for following markets.
When troubleshooting or replacing parts, please refer to the country identifications shown below for your applicable product specification.
BPQ ... for the United Kingdom
INVERTER WARNING
This Inverter board looks like a regular PCB, however, this PCB drives the magnetron tube with extremely high voltage and high current.
IT HAS:
1: Very high voltage and high current circuit.
It functions the same as the high voltage transformer and high voltage capacitor in ordinary microwave ovens.
2. aluminium heat sink is very hot.
3. Very high voltage may remain in the circuitry even when the oven is off. High voltages may remain in the capacitors on the board.
DO NOT: *1. Do not touch the circuitry as it becomes very hot (high voltage). Even when replacing board, extreme care should be taken to avoid
possible electric shock. High voltage may remain in the circuit.
*2. Do not touch aluminium heat sink because it is very hot in high voltage and also very hot in high heat energy.
*3. Do not try to repair the Inverter PCB as this can be very dangerous. Replace the whole High Voltage Inverter Circuit(U) unit and
return fully re-packed with the original shopping box and shipping materials.
*4. Do not try to adjust or tamper with the preset volume on the Inverter board because it is very dangerous to adjust it without proper
test equipment.
*5. Do not test oven while Inverter grounding strip or screws are loose. It is very dangerous to operate the H.V. Inverter Circuit (U) with
loose mounting screws or if improperly grounded.
INVERTER POWER SUPPLY DIAGRAM
NEW H.V.
HIGH VOLTAGE AREA*1
DO NOT TOUCH (HOT/HIGH VOLTAGE) *2
HEAT SINK (RECTIFIER BRIDGE)
CHOKE COIL
SAND BAR RESISTOR
CUSTOM I.C.
PHOTO COUPLER
CN 701
CURRENT TRANSFORMER
DO NOT TOUCH *4
HIGH VOLTAGE
PRIMARY WINDINGS
SECONDARY WINDINGS
HIGH VOLTAGE DIODES
CN 703
HIGH VOLTAGE CAPACITORS
DO NOT REPAIR. REPLACE WHOLE H.V.INVERTER(U)
H.V. INVERTER(U) *3
LEAD WIRE
GROUNDING PLATE *5
INVERTER WARNING
INVERTER SUPPORT
BRACKET
LABEL
FILM CAPACITORS
TRANSFORMER