Panasonic INVERTER NN-A750WB Manual page 31

3. When replacing the silver escutcheon sheet (NN-A720MB) ensure
that the escutcheon sheet is earthed to the back-plate via the
earth strip.
9.4. Low voltage transformer and/or power relays (RY1)
Note
Be sure to ground your body to discharge any static before
handling the DPC.
1. Using a solder wick or a de soldering tool and a 30W soldering
iron, carefully remove all solder from the terminal pins of the low
voltage transformer and/or power relays.
2. With all of the terminal pins cleaned and separated from the DPC
contacts, remove the defective transformer/power relays and
install the new components making sure that the terminal pins are
inserted completely. Carefully re solder all terminal contacts
Figure 4
Removal of DPC AU and DPC DU
Figure 5
Grounding of the silver escutcheon
31