Daewoo KOR-632G0S, Руководство по обслуживанию

Страница: 21 / 37

TROUBLE SHOOTING GUIDE
( TROUBLE 3 ) No m icrowave oscillation even though fan m otor rotates.
C O N DITIO N
C HE C K R ES U LT
C ontinuity
C ontinuity in
backw ard
direction
0 Ω
or
N o
C ontinuity
N o
C ontinuity
0 V
A pprox
15 V D C
C AU S E
D efective
high voltage
transform er
D efective
high voltage
rectifier
D efective
m agnetron
D efective
m agnetron
D efective
high voltage
transform er
D efective
high voltage
transform er
D efective
touch control
circuit
Faulty
contacts or
R ELAY
(RY 1) or open
relay coil
R EM ED Y
R eplace
R eplace
R eplace
R eplace
R eplace
R eplace
R eplace
R eplace
N o m icrow ave
oscillation
C heck continuity of high
voltage rec tifier in
fo rw ard and bac kw ard
direction w ith D C
m egge r
C heck continuity of high
voltage capacito r
te rm inals w ith w ires
rem oved
C onnect m egger leads to
m agne tron term ina l and
m agne tron body
C heck resis tance of
prim ary and s econdary
coil of high voltage
transfo rm er
C heck continuity of
m agne tron w ith w ires
rem oved
C heck continuity of
filam ent term inal of high
voltage transform er
C heck D .C . voltage
being sup plied to
R ELAY (R Y1) coil
C ontinuity
C heck continuity of high
voltage fu se
N o C ontinuity
R epla ce high v oltage fuse