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Daewoo KOC-9Q4T Service Manual

Daewoo KOC-9Q4T
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22
8. TROUBLESHOOTING GUIDE
Following the procedure below to check if the oven is defective or not.
1) Check grounding before trouble checking.
2) Be careful of the high voltage circuit.
3) Discharge the high voltage capacitor.
4) When checking the continuity of the switches, fuse or high voltage transformer, disconnect one load wire from these
parts and check continuity with the AC plug removed. To do otherwise may result in a false reading or damage to
your meter.
(TROUBLE 1) Oven does not operate at all : any inputs can not be accepted.
NOTE :
When electric parts are checked, be sure the power cord is not inserted the wall outlet.
Check wire harness, wiring and connection of the terminals and power cord before check the parts listed below.
CONDITION CHECK
Check continuity of
interlock monitor switch with
door closed
(COMNC)
Check continuity of
both primary and secondary
interlock switch with door closed
Malfunction of
Interlock
monitor switch
Malfunction of
interlock switch
RESULT
Continuity
No continuity
CAUSE REMEDY
Replace
(COMNC)
Fuse blows.
Replace
Shorted contacts
of primary
interlock Switch
Continuity
Replace
Check continuity of
primary interlock switch contact with
door partially open until interlock
monitor switch contact close
( COMNC close )
Defective low
voltage
transformer
Defective
high voltage
transformer
0 or infinite Replace
Replace
Check continuity of
primary winding of low voltage
transformer
Disconnect high voltage
fuse and operate the unit
No
Continuity
Continuity
Approx.
530 ~ 1130
( normal )
Fuse again
blows

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Daewoo KOC-9Q4T Specifications

General IconGeneral
Turntable-
Control typeButtons, Rotary
Display typeLED
Product colorSilver
Microwave power1400 W
Built-in displayYes
Appliance placementCountertop
Number of power levels10
Connected load900 W
AC input voltage230 V
AC input frequency50 Hz
Weight and Dimensions IconWeight and Dimensions
Depth383 mm
Width513 mm
Height311 mm
Weight16600 g
Interior dimensions (W x D x H)354 x 341 x 231 mm

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