Trouble Shooting Guide - Daewoo KOR-632G0S Service Manual

TROUBLE SHOOTING GUIDE

Following the procedure below to check if the oven is defective or not.
1) Check earthing before trouble checking.
2) Be careful of the high voltage circuit.
3) Discharge the high voltage capacitor.
4) W hen checking the continuity of the switches, fuse or high voltage transform er, disconnect one lead wire from these parts
and check continuity with the AC plug removed. To do otherwise m ay result in a false reading or dam age to your meter.
NOTE
W hen electric parts are checked, be sure the pow er cord is not inserted the w all outlet.
C heck w ire harness, w iring and connected of the term inals and power cord before check the parts listed below.
(TROUBLE 1) Oven does not operate at all : any inputs can not be accepted.
C O N D ITIO N
Fuse blow s.
C heck co ntinuity of both
prim ary and secondary
interlock sw itch w ith door
colosed
C heck co ntinuity of prim ary
interlock sw itch contact
w ith door partially open
until interlock m onitor switch
contact close
(C O M <->N O )
D isconne ct high voltage
fuse and operate the unit
CHECK
C heck co ntinuity of
interlock m onitor sw itch


w ith door closed
(C O M N C)
C heck co ntinuity of
prim ary w inding of low
voltage transform er
RESULT CAUSE
M alfunction
C ontinuity
of interlock
m on itor
N o C ontinuity N o C ontinuity
N o C ontinuity
M alfunction of
interlock sw itch
C ontinuity
C ontinuity
S horted contacts
of prim a ry
interlock sw itch.
Ω or
0 infinite
D efective low
voltage
A pprox.
transform er
150~310
(norm al)
Fuse again
D efective high
blows
voltage transform er

REM EDY
R eplace
N O TE 1
sw itch
R eplace
N O TE 1
R eplace
N O TE 1
R eplace
R eplace