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.
Normal.
Defective high
voltage capacitor.
Replace high
voltage capacitor.
Fuse blows again
Defective high volt-
age transformer.
Replace high volt-
age transformer.
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).
Disconnect one
side of the wire
lead connected
from transformer
to the high
voltage
capacitor and
operate the unit.
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
Summary of Contents for NN-S723BL
Page 26: ...P NO 3828W5S2878 Printed in Korea ...
Page 28: ...7 1 SCHEMATIC DIAGRAM OF D P C ...
Page 29: ...7 2 PRINTED CIRCUIT BOARD ...
Page 30: ...6 2 DOOR PARTS 13 18 19 11 15 16 12 EV ...
Page 31: ...6 3 37 39 28 48 CONTROLLER PARTS EV ...
Page 32: ...6 4 OVEN CAVITY PARTS 5 9 10 45 3 8 46 44 EV ...
Page 33: ...6 5 LATCH BOARD PARTS 14 31 43 32 30 EV ...
Page 34: ...6 6 INTERIOR PARTS 2 47 33 41 28 50 21 23 1 42 27 28 29 34 42 49 22 24 36 35 26 42 40 EV ...
Page 35: ...6 7 BASE PLATE PARTS 6 4 28 42 46 25 EV ...
Page 36: ...7 1 SCHEMATIC DIAGRAM OF D P C ...
Page 37: ...7 2 PRINTED CIRCUIT BOARD ...
