Panasonic NE-7920 Service Manual page 15

(A) Replace the latch switch A (primary), latch switch
B (secondary) and short switch. This is mandatory.
Refer to pages 19 & 20 for the necessary adjust-
ments for these switches.
(B) When replacing the fuse, confirm that it has the
appropriate rating for this model.
Never insert a wire, nail or any other metal object
through the lamp holes on the cavity or any other
holes or gaps, because such objects may work as an
antenna and cause microwave leakage.
6. Confirm after repair
(A) After repair or replacement of parts, make sure that
the screws of the oven, etc. are neither loose nor
missing. Microwaves might leak if screws are not
properly tightened.
(B) Make sure that all electrical connections are tight
before inserting the plug into the wall outlet.
(C) Check for radiation leakage, (Refer to procedure
for measuring radiation leakage on pages 21 & 22)
DISASSEMBLY AND PARTS REPLACEMENT PROCEDURE
1. Removal of outer panel
pushed backward to be lifted off.
2. Replacement of the magnetron
MAGNETRON.
holding it to the oven cavity.
terminals.
magnetron.
(E) Remove four nuts holding the magnetron.
NOTE 1: Make sure that the embossed ring is rigidly
attached on the magnetron anode. (see
fig. 15)
NOTE 2: To prevent microwave leakage, tighten the
mounting nuts properly making sure there is
no gap between the waveguide and the
magnetron.
THERMAL
CUTOUT
Fig. 14
MAGNETRON
Fig. 15
3. Replacement of the fan motor assembly.
(A) Remove the variable power switch and the high
voltage capacitor.
(B) Remove the rubber belt from pulley C.
(C) Remove 5 screws holding fan motor bracket.
(See figure 16 & 17)
(D) Pull the fan motor with the bracket and gear box
toward you.
(E) Remove the belt A from fan motor's pull ey.
(F) Remove three screws holding the fan motor assern-
bly. (See figure 18)
(G) Remove the wire pin to remove pulley.