7-22
CONDITION
CHECK
RESULT
CAUSE
REMEDY
1. Fuse blows.
Continuity.
No continuity.
Continuity.
Shorted contact at
the primary switch.
Replace fuse,
primary, monitor
switches, and
P.C.B Assembly.
No continuity.
Normal.
Defective door or
control PCB.
Replace door or
control PCB.
Fuse blows again
Defective Inverter.
Replace Inverter.
Malfunction of the
monitor switch.
Replace fuse,
primary, monitor
switches, and
P.C.B Assembly.
Check continuity
of monitor
switch (with
door closed).
Check continuity
of primary
switch (with
door opened).
Disconnect one
side of the lead
wires connected
from Inverter.
Replace fuse
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.
Summary of Contents for 721. 63762
Page 9: ...5 1 SCHEMATIC DIAGRAM OVERALL CIRCUIT DIAGRAM...
Page 10: ...5 2 MATRIX CIRCUIT FOR TOUCH KEY BOARD...
Page 37: ...8 2 CONTROLLER PARTS I 1001 W171 W171 2016 2009 2007 2017 EV...
Page 38: ...2004 2008 2002 2006 W106 2381 8 3 CONTROLLER PARTS II EV...
Page 40: ...8 5 LATCH BOARD PARTS 4000 W102 4001 4002 4003 4002 4004 EV...
Page 44: ...8 21 SCHEMATIC DIAGRAM OF P C B...
Page 45: ...8 22 PRINTED CIRCUIT BOARD...
