Sharp R-530EK service manual Test Procedures, Component Test, Letter

Models: R-530EK

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MFOIL PATTERN ON THE PRINTED WIRING BOARD TEST

R - 5 3 0 E K

R - 530EW

TEST PROCEDURES

PROCEDURE

 

COMPONENT TEST

 

 

 

LETTER

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MENU

1ST STAGE

2ND STAGE

 

 

Steaks, chops or fish

 

 

 

 

 

 

 

LEVEL

TIME

LEVEL

TIME

 

 

 

 

 

 

 

 

 

 

0.5lb

70%

30sec.

40%

15sec.

 

 

 

 

 

 

 

 

 

(5) If improper operation is indicated, the control unit is probably defective and should be checked.

MFOIL PATTERN ON THE PRINTED WIRING BOARD TEST

To protect the electronic circuits, this model is provided with a fine foil pattern added to the primary on the PWB, this foil pattern acts as a fuse.

1.Foil pattern check and repairs.

1)Disconnect the power supply cord, and then remove outer case.

2)Open the door and block it open.

3)Discharge high voltage capacitor.

4)Follow the troubleshooting guide given below for repair.

STEPS

OCCURRENCE

CAUSE OR CORRECTION

 

 

 

1

Only pattern at "a" is broken.

*Insert jumper wire J1 and solder.

 

 

 

2

Pattern at "a" and "b" are broken.

*Insert the coil RCILF2003YAZZ between "c" and "d".

 

 

 

5)Make a visual inspection of the varistor. Check for burn damage and examine the transformer with a tester for the presence of layer short-circuit (check the primary

coil resistance which is approximately 210Ω ± 15%). If any abnormal condition is detected, replace the defective parts.

VRS1

VH

1 AC

T1

 

 

 

2

 

 

d

CN - A

XA

 

 

b

(J1)

c

 

a

 

 

 

 

 

 

 

 

 

 

 

 

D U

OMIF

6)Reconnect all leads removed from components during testing.

7)Re-install the outer case (cabinet).

8)Reconnect the power supply cord after the outer case is installed.

9)Run the oven and check all functions.

2.Follow the troubleshooting guide given below, if indicator does not light up after above check and repairs are finished.

1)Disconnect the power supply cord, and then remove outer case.

2)Open the door and block it open.

3)Discharge high voltage capacitor.

4)Disconnect the leads to the primary of the power transformer.

5)Ensure that these leads remain isolated from other components and oven chassis by using insulation tape.

6)After that procedure, reconnect the power supply cord.

7)Follow the troubleshooting guide given below for repair.

STEPS

OCCURRENCE

CAUSE OR CORRECTION

 

 

 

 

The rated AC voltage is not present between

 

1

Pin No. 1 of the 2-pin connector (A) and the

Check supply voltage and oven power cord.

 

common terminal of the relay RY1.

 

 

 

 

2

The rated AC voltage is present at primary

Low voltage transformer or secondary circuit defective.

side of low voltage transformer.

Check and repair.

 

 

 

 

8)Disconnect the power supply cord, and then remove outer case.

9)Open the door and block it open.

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Sharp R-530EK service manual Test Procedures, Component Test, Letter, M Foil Pattern On The Printed Wiring Board Test