Panasonic NN-V629MB, Service Manual

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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 Steam Sensor and digital programmer
circuit
In order to determine if the steam sensor programme of the
digital programmer circuit is in working order or not, do the
fllowing test.
1. Place a water load (150cc) in the oven.
2. Set Auto Sensor Program 5 Fresh Fish.
3. Tap Start pad.
4. Steam Sensor detects steam about 1 minute 30 seconds to
4 minutes after the Start pad is tapped.
5. T1 time cooking automatically switches to remaining time
cooking. (T2)
6. The remaining cooking time (T2) appears in the display
window. If the following cooking times appear Steam
Sensor function is normal.
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.
CAUTION
Do not touch any parts of the cicuitry on the digital
programmer circuit since static electric discharge may
damage this control panel.
Always ground yourself while working on this panel to
discharge any static builtt up on your body.
NEW H.V.
T1 TIME T2 TIME
(Remaining cooking time)
1 Min. 30 Sec. ~ 4 Min. 8 Sec. ~ 23 Sec.