(TROUBLE 2) Oven does not operate at all, Display window does not display any figures, and no input is accepted.

CONDITION

1. Fuse blows.

CHECK

RESULT

Check continuity

Continuity.

of monitor

 

switch (with

 

door closed).

No continuity.

 

Replace fuse

 

CAUSE

Malfunction of the monitor switch.

REMEDY

Replace fuse, primary, monitor, secondary switches, and RELAY(RY2) of P.C.B Assembly.

Check continuity

 

 

 

Continuity.

 

 

of primary

 

 

 

 

 

 

 

 

 

 

 

switch (with

 

 

 

 

 

 

door opened).

 

 

 

No continuity.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Check continuity

Continuity.

of secondary

 

switch (with

 

door opened).

No continuity.

 

Shorted contact at the primary switch.

Malfunction of secondary switch.

Replace fuse, primary, monitor, secondary switches, and RELAY(RY2) of P.C.B Assembly.

Replace fuse, primary, monitor, secondary switches, and RELAY(RY2) of P.C.B Assembly.

Disconnect one

Normal.

side of the wire

 

lead connected

 

from transformer

Fuse blows again

to the high

 

voltage

 

capacitor and

 

operate the unit.

 

Defective high

 

 

Replace high

voltage capacitor.

 

 

voltage capacitor.

 

 

 

 

 

 

 

 

Defective high volt-

 

 

Replace high volt-

age transformer.

 

 

age transformer.

 

 

 

 

NOTE : All these switches must be replaced at the same time. Refer to page 5-7, 5-8

2.Fuse does not blow.

 

Check continuity

 

 

 

No continuity.

 

 

 

 

 

 

 

 

 

of thermostat.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Continuity.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Check continuity No continuity. of power supply

cord.

Defective thermostat.

Defective power supply cord.

Replace thermostat.

Replace power supply cord.

5-13

Page 35
Image 35
Goldstar MA-2005ST service manual Result