Sharp Carousel R-210D Servis Kılavuzu - Sayfa 8

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R-210D

Microwave ovens contain circuitry capable of producing very high voltage and current, contact with any part of the

high voltage circuit will result in electrocution. High voltage capacitor, Power transformer, Magnetron, High voltage

rectifier assembly, High voltage harness.

REMEMBER TO CHECK 3D

1) Disconnect the supply.

2) Door opened, and wedged open.

3) Discharge the high voltage capacitor.

WARNING: AGAINST THE CHARGE OF THE

HIGH-VOLTAGE CAPACITOR

The high-voltage capacitor remains charged about

60 seconds after the oven has been switched off.

Wait for 60 seconds and then short-circuit the

connection of the high-voltage capacitor (that is, of

the connecting lead of the high-voltage rectifier)

against the chassis with the use of an insulated

screwdriver.

Sharp recommend that wherever possible fault-finding

is carried out with the supply disconnected. It may, in

some cases, be necessary to connect the supply after

the outer case has been removed, in this event carry out

3D checks and then disconnect the leads to the primary

of the power transformer. Ensure that these leads

remain isolated from other components and the oven

chassis. (Use insulation tape if necessary.) When the

testing is completed carry out 3D checks and reconnect

the leads to the primary of the power transformer.

When all service work is completed and the oven is fully assembled, the microwave power output should be

checked and microwave leakage test should be carried out.

When troubleshooting the microwave oven, it is helpful to

follow the Sequence of Operation in performing the

checks. Many of the possible causes of trouble will require

that a specific test be performed. These tests are given a

procedure letter which will be found in the "Test

Procedure"section.

SERVICING

WARNING TO SERVICE PERSONNEL

TROUBLESHOOTING GUIDE

REMEMBER TO CHECK 4R

1) Reconnect all leads removed from components

during testing.

2) Replace the outer case (cabinet).

3) Reconnect the supply.

4) Run the oven. Check all functions.

Microwave ovens should not be run empty. To test for

the presence of microwave energy within a cavity,

place a cup of cold water on the oven turntable, close

the door and set the power level to HIGH. And set the

microwave timer for two (2) minutes. When the two

minutes has elapsed (timer at zero) carefully check

that the water is now hot. If the water remains cold,

carry out 3D checks and re-examine the connections to

the component being tested.

IMPORTANT: If the oven becomes inoperative because

of a blown fuse M8A in the 1st. latch switch

- 2nd. latch switch - monitor switch - moni-

tor resistor circuit, check the 1st. latch

switch, 2nd. latch switch, monitor switch

and monitor resistor before replacing the

fuse M8A.