Sharp Carousel R-210D Servis Kılavuzu - Sayfa 15

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PROCEDURE

LETTER

PROCEDURES TO BE TAKEN WHEN THE FOIL PATTERN ON THE PRINTED WIRING

BOARD(PWB) IS OPEN

To protect the electronic circuits, this model is provided with a fine foil pattern added to the input circuit

on the PWB, this foil pattern acts as a fuse. If the foil pattern is open, follow the troubleshooting guide

given below for repair.

Problem: POWER ON, indicator does not light up.

CARRY OUT 3D CHECKS.

STEPS

NOTE: *At the time of these repairs, make a

visual inspection of the varistor for

burning damage and examine the

transformer with tester for the pres-

ence of layer short circuit (check pri-

mary coil resistance).

If any abnormal condition is detected,

replace the defective parts.

CARRY OUT 4R CHECKS.

TEST PROCEDURES

OCCURRENCE

The rated AC voltage is not present at

Power terminal of CPU connector (CN-A).

The rated AC voltage is present at primary

side of low voltage transformer.

Only pattern at "a" is broken.

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

COMPONENT TEST

CAUSE OR CORRECTION

Check supply voltage and oven power cord.

Low voltage transformer or secondary circuit defective.

Check and repair.

*Insert jumper wire J1 and solder.

(CARRY OUT 3D CHECKS BEFORE REPAIR)

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

(CARRY OUT 3D CHECKS BEFORE REPAIR)

(J1)

R-210D

CN - A