R-234 (serv.man2). Part 1 Text (1-28) - Sharp Home Appliance Service Manual (repair manual). Page 15

R-234 - 15

CARRY OUT 3D CHECKS

1. If the fuse F1is blown, there could be shorts or grounds in electrical parts or wire harness. Check them

and replace the defective parts or repair the wire harness.

2. If the F1 is blown, there could be short to  ground in wire harness.  Check them and replace the

defective parts or repair the wire harness.

CARRY OUT 3D CHECKS

Disconnect the leads from the terminals of the thermal cut-out. Then using an ohmmeter, make a
continuity test across the two terminals as described in the below.

CARRY OUT 4R CHECKS

Temperature of "ON" condition (closed circuit) .................................................................................  This is not resetable type
Temperature of "OFF" condition (open circuit) ....................................................................................................  Above 125

°

C

Indication of ohmmeter (When room temperature is approx. 20

°

C.) ...................................................................  Closed circuit

If incorrect readings are obtained replace the thermal cut-out.

An open circuit thermal cut-out (OVEN) indicates that the foods in the oven may have caught fire, this
may be due to over heating produced by unproper setting of the cooking timer or failure of the control
panel.

CARRY OUT 3D CHECKS

Disconnect the leads from the terminals of
the noise filter.
Using an ohmmeter, check between the ter-
minals as described in the following table.

Between N and L

Open circuit

Between terminal N and WHITE

Short circuit

Between terminal L and RED

Short circuit

Rx 

±

5%

L(min)

Cx 

±

 20%

Cy 

±

 20%

Ry 

±

5%

680k

Ω

1.0mH

0.22

µ

F

0.0033

µ

F

10M

Ω

. ssp If correct readings are obtained, replace the noise filter unit.

CARRY OUT 4R CHECKS

Cx

Cy

Rx

Ry

Cy

L

L

RED

WHT

 F8A

L

N