Sharp R-7A67M (serv.man6) Service Manual / Technical Bulletin ▷ View online
MWO2000 05 02
Month of Issue:
MICROWAVE TECHNICAL BULLETIN
Page 1 of 1
Sharp Electronics (UK) Limited
White Carry out as required
Yellow Carry out as required and whenever the unit comes in for service
Red Carry out on all units
All microwave ovens
SYMPTOM Localised 'scorch' marks on the oven cavity faceplate and/or the door sub-assembly
following normal operation.
Variation in the sealing gap between the door sub-assembly sealer plate and oven
cavity faceplate could lead to localised scorching. This phenomenon can be
aggravated by abnormal usage such as no-load operation.
Suggested repair methods are as follows: -
1. Stainless Steel Cavities
Providing the scorching is not of a severe nature: -
Rub the cavity faceplate down to remove marks. This can be achieved by
use of a suitable grade of wire wool ensuring a uniform finish is obtained.
Replace the door assembly.
2. Painted Cavities
Unfortunately in these cases there maybe no option but to replace both oven cavity
and door sub-assembly, dependant on scorching severity.
Normal service procedures should follow any repair work i.e. leakage checks etc, and
it is recommended that the oven is run for a sufficient period to confirm no repeat