Sanyo SM-GA0005 service manual Repairing Method of Several Breakdown, Right above

5.3REPAIRING METHOD OF SEVERAL BREAKDOWN

1.Repair when there occurred large amounts microwave leakage. There are many factors which may cause microwave leaking. Following mentioned may be the main causes of

microwave leakage:

(1)The door deformed, the hinge loosed or damaged that caused the door can not close tightly.

(2)The door pressing cover or the embed piece damaged or come off.

(3)Obvious damage or uneven of the oven.

(4)There are filth between the door and the oven.

(5) The door and the oven are serious loosed after the door closed.

(6) The crack of the door shielding net cover.

Before repairing, check whether the above listed point are

existed, if not, can you start the microwave oven. Place a graduate of about 275ml water at the middle of the glass tray, close the door, time set at 3 minutes, power at high, make the oven operating in normal. Rectify the microwave leakage measure, measure the amount of the microwave leakage around the oven with its probe. If there are places which the leakage exceeds the standard requirement, then repair them accordingly. If the leakage amount exceeds 1 milliwatt/cm2 at the left door crack,

then pull out the power plug, take down the cabinet, adjust the	door pushing	screw
screws of the hinge (up and low) as figure5-14 to less the gap	part at
between the door and the oven. Then measure again, the	right above
leakage amount should be less than 1 milliwatt/cm2. Generally,
it should be controlled below 0.75 milliwatt/cm2 with some		micro switch
allowance.
If the leakage occurred at the right door crack, adjust the
screws which fix the interlock holder and the hook. If the
leakage is the larger side at the right – above of the oven, then	door pushing	screw
adjust the upper screw as FIG.5 – 15. Loosen out the screw,	part at
push the door close to the oven to hook the door hook with the	right below
plastic parts, then tighten the Screw again. If the leakage is
larger at the right – below, then adjust the lower screw as FIG. 5

–15. Loosen the screw, push the door close to the oven to hook the door hook with the switch holder tightly, then tighten the screw again, and open and close the door repeatedly, to check whether the door can operate flexibly, whether the hook and the switch are in their normal position. If it is not in position, then adjust the door hook and the switch holder repeatedly to make them to normal position, to put through the interlocks, to cut off the pilot switch, to less the loose between the door and the oven, then measure the leakage with microwave measure again.

If the leakage still exceeds standard requirement, then inspect whether the right oven is even or not, if not, smooth it. Then adjust the door and the oven to eliminate their loose to the ultimate.

If there still exist microwave leakage, measure near the magnetron with the probe of the microwave leakage mea-sure. If the leakage is larger, the oven should be turned off and check whether the four screws which fix the magnetron have been loosed, if loosed, twist them tightly with socket wrench. If the four screws are fixed, then the magnetron should be taken down to check the copper filament weaved washer of the magnetron has been placed well or whether the wave guide housing coupling has been oxidized or have lacquer on it. If do have, scrape the oxidized layer or the lacquer off. When fix the magnetron, the copper filament weaved washer must be placed well, the screws must be twist tightly. Then turn on the oven and measure again until it comply with the requirement. If

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