LG RCS10MPA Service Manual - Page 31

CONDITION, CHECK, RESULT, CAUSE, REMEDY, TROUBLE 2, Oven does not operate at all, Display window

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(TROUBLE 2) Oven does not operate at all, Display window does not display any figures, (TROUBLE 2a) nOdvneon idnopeust insoatcoceppetreadte. at all, Display window does not display any figures, and no input is accepted. CONDITION CONDITION 1. Fuse blows. 1. Fuse blows. CHECK CHECK Check continuity ofCmheocnkitocrontinuity swofitcmho(nwitiothr dosowritcclhos(wedit)h. door closed). Replace fuse Replace fuse CosdwfoCosdhopwfoiehtrrcpocieithmorrkcciphmoka(cwepor(acynweinorteynhitntidehnti)dun.)iu.tyity RESULT RESULT Continuity. Continuity. No continuity. No continuity. CCoonntitninuuitiyty. . NNooccoonntitninuuitiyty. . CChehcekckcocnotnintiuniutyity ofosf esceocnodnadrayry swswitcithch(w(withith dodooroor poepneende)d.). CCoonntitninuuitiyty. . NNooccoonntitninuuitiyty. . DiDscisocnonnencetcot noene sidsiedeofotfhtehewwireire lelaedadcocnonnencetcetded frofrmomtratrnasnfsofromrmerer totothtehehihgihghvovlotaltgaege cacpaapcaictoitroar nadnd opoepreartaetethteheunuint.it. FFuusseebblolowwssaaggaainin NNoormrmaal.l. CAUSE CAUSE Malfunction of the mMoanlfiutonrcstiwonitcohf.the monitor switch. SthSthheheooprprtrteriemidmdacacroryoynnststawawcciittttccaahhtt.. MMaalflfuunnccttioionnooff sseeccoonnddaarryysswwiittcchh.. DDeefefeccttivivee hhiigghh vvoolltt-aaggeettrraannssffoorrmmeerr.. REMEDY REMEDY Replace fuse, pRreimplaarcye, mfuosneit,or, spercimonadrya,rymonitor, sswecitcohnedsa,raynd RswELitAchYe(Rs,Ya3n)d oRfEPL.ACY.B(RAYs2s)emofbly. P.C.B Assembly. Replace fuse, pssRpewrreicimipmtoclanaahrdrceyyae,s,r,myfmauonsondenit,iotro,r, RseEcLoAnYd(aRrYy3 ) osfwPit.cCh.BesA, sasnedmbly. RELAY(RY2) of P.C.B Assembly. RpsRperreeicimppmollaanaarcdrcyeyae,,rmfyfumuossoneeni,t,iotro,r, sswecitcohnedsa,raynd RswELitAchYe(Rs,Ya3n)d oRfEPL.ACY.B(RAYs2s)emofbly. P.C.B Assembly. RReeppllaaccee hhiigghh vvoolltt-aaggee ttrraannssffoorrmmeerr.. MMeaesausrueretoto rerseisitsatnacnecehihgihgh vovlotaltgaegecacpaapcaictoitror (re(rfeefretrotopapgaege5-59-)9) NNoormrmaal.l. AAbbnnoormrmaal.l. DDeefefeccttiviveehhiigghh vvooltlataggeeccaappaacciittoorr.. Set is good condition (defective fuse only) Replace high voltage capacitor. NONTOETE: A: lAl ltlhtehseeseswswitcithcehsesmmuuststbbeererepplalacceeddaat tththeessaammeetitmimee..RReeffeerrttooppaaggee55--77,, 55--88 2. 2F.uFsuesdeodeosensontot blobwlo.w. CChehcekckcocnotnintiuniutyity ofotfhtehremrmosotsatta.t. NNooccoonntitninuuitiyty. . CCoonntitninuuitiyty. . DDeefefeccttivivee ththeerrmmoossttaatt.. Replace thermostat. CChehcekckcocnotnintiuniutyity ofopf opwowerersuspuppplyly cocrodr.d. NNooccoonntitninuuitiyty. . 5-13 DDeefefeccttiviveeppoowweerr ssuupppplylyccoorrdd.. RReeppllaaccee ppoowweerr ssuuppppllyy ccoorrdd..

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5-13
CONDITION
CHECK
RESULT
CAUSE
REMEDY
1. Fuse blows.
Continuity.
No continuity.
Continuity.
Shorted contact at
the primary switch.
Replace fuse,
primary, monitor,
secondary
switches, and
RELAY(RY2) of
P.C.B Assembly.
No continuity.
Malfunction of the
monitor switch.
Replace fuse,
primary, monitor,
secondary
switches, and
RELAY(RY2) of
P.C.B Assembly.
Check continuity
of monitor
switch (with
door closed).
Check continuity
of primary
switch (with
door opened).
Replace fuse
Continuity.
Malfunction of
secondary switch.
Replace fuse,
primary, monitor,
secondary
switches, and
RELAY(RY2) of
P.C.B Assembly.
No continuity.
Check continuity
of secondary
switch (with
door opened).
2. Fuse does not
blow.
No continuity.
Continuity.
No continuity.
Defective power
supply cord.
Replace power
supply cord.
Defective
thermostat.
Replace
thermostat.
Check continuity
of thermostat.
Check continuity
of power
supply
cord.
(TROUBLE 2)
Oven does not operate at all, Display window does not display any figures,
and no input is accepted.
NOTE : All these switches must be replaced at the same time. Refer to page 5-7, 5-8
Normal.
Normal.
Abnormal.
Defective high
voltage capacitor.
Replace high
voltage capacitor.
Set is good condition
(defective fuse only)
Fuse blows again
Defective high volt-
age transformer.
Replace high volt-
age transformer.
Disconnect one
side of the wire
lead connected
from transformer
to the high voltage
capacitor and
operate the unit.
Measure to
resistance high
voltage capacitor
(refer to page 5-9)