5-15
CONDITION
CHECK
RESULT
CAUSE
REMEDY
1. Setting time
does not count
down when
touching START
pad.
2. Fan motor or
oven lamp do
not turn on.
No continuity.
Continuity.
Continuity
Defective PCB
assembly.
Loose connection.
Replace PCB
assembly.
Connect them
tightly.
No continuity
Abnormal
Check fan motor.
Defective fan motor.
Replace fan motor.
Abnormal
Normal
Check oven lamp.
Defective oven lamp.
Replace oven lamp.
Defective
secondary switch.
Replace
secondary switch.
Check continuity
of secondary
switch (with
door closed).
Check the con-
nection between
CN1 connector
and PCB
assembly.
(TROUBLE 3) Display shows all figures set, but oven does not start cooking while desired
program times are set and START pad is touched.
(TROUBLE 4) Oven seems to be operating but little heat is produced in oven load.
NOTE : Simple test of power output-conducted by heating one liter water for one min. if available.
Minimum 8.5°C temperature rise is normal condition.
CONDITION
CHECK
RESULT
CAUSE
REMEDY
Output is low
Lower than 90% of
rating voltage.
Normal
Abnormal
Defective PCB
assembly.
Replace PCB
assembly.
Normal
Abnormal
Measure the
output power.
Defective
magnetron.
Replace
magnetron.
Decrease in power
source voltage
with load.
Suggest customer
contact local
electric power
utility company
or qualified
electrician.
Check the
power source
voltage.
Disconnect the
wire leads from
relay 2 and
check on and off
time with
multitester.
Содержание MB-319ML
Страница 9: ...SCHEMATIC DIAGRAM 4 3 ...
Страница 28: ...6 2 13213A 13552A 13536A 14026A 14970A 13581A 15006A 14890A 13720D DOOR PARTS ...
Страница 31: ...6 5 43501A WSZ085 466001 466003 466001 43500A LATCH BOARD PARTS ...
Страница 33: ...6 7 63302L 63303L 56170D 63302R 948503 WSZ002 WTT021 63303R WTT028 647781 368771 BASE PLATE PARTS ...
Страница 36: ...8 1 SCHEMATIC DIAGRAM OF P C B ...
Страница 37: ...8 2 PRINTED CIRCUIT BOARD ...
Страница 40: ...P NO 3828W5S1726 Aug 2002 Printed in Korea ...