\&.
SERVICE MANUAL Microwave Oven
Si
o
Eh/!81OFS (Nemm.land)
Jan 201992
‘L-
I
Product Code No.
432-326-51
Foreword
Read
this manual carefully, especially precaution on microwave energy,. and follow the prctedure strictly. Careless servicing and
testing may expose yourself to the microwave energy leakage.
PRECAUTIONS
PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO AVOID POSSIBLE EXPOSURE TO EX-
CESSIVE MICROWAVE ENERGY
L
REFERENCE NO. WM-640 207
(a)
(b)
(c)
(d)
Do not operate or allow the oven to be operated with the door open.
Make the following safety checks on all ovens to be serviced before activating the magnetron or other microwave source,
and make repairs as necessary:
(1) Interlock operation, (2) proper door closing,
(3) seal and sealing surfaces (arcing, wear, and other damage), (4)
damage to or loosening of hinges and latches,
(5) evidence of dropping or abuse.
Before turning on microwave power for any service test or inspection within the microwave generating compartments,
check the magnetron, wave guide or transmission line,
and cavity for proper alignment.
integrity, and connections.
Any defective or misadjusted components
in the interlock, monitor, door seal, and microwave generation and trans.
mission systems shall be repaired, replaced, or adjusted by procedures described in this manual before the oven is released
to the owner.
– TABLE OF CONTENTS –
Adjustment Procedures ..:.... . . . . . . . . . . . . . . . 1
Test Procedures and Troubleshooting . . . . . . . . . 4-10
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . ...2
Disassembly Instructions . . . . . . . . . . . . . . . . . 11-14
Power Output Measurement . . . . . . . . . . . . . . . . . . . 2
Exploded View and Parts List . . . . . . . . . . . . . 15-21J
\
Precautions and Repair Service Tips . . . . . . . . . . 2
Overall Circuit Diagram . . . . . . . . . . . . . . . . . .
21
Circuit Diagram . . . . . . . . . . . . . . . . . . . . . . . . ...3
,
-
CAUTION
MICROWAVE RADIATION
PERSONNEL SHOULD NOT BE EXPOSED TO THE
MiCROWAVE ENERGY WHICH MAY RADIATE
FROM THE MAGNETRON OR OTHER MICRO-
WAVE GENERATING DEVICE IF IT IS impro-
perly USED OR CONNECTED. ALL INPUT AND
OUTPUT MICROWAVE CONNECTIONS, WAVE-
GUIDES, FLANGES, AND GASKETS MUST BE
SECURE. NEVER OPERATE THE DEVICE WITH-
OUT A MICROWAVE ENERGY ABSORBING
LOAD ATTACHED. NEVER LOOK INTO AN
OPEN WAVEGUIDE OR ANTENNA WHILE THE
DEVICE IS ENERGIZED.
1.
ADJUSTMENT PROCEDURES
TO AVOID POSSIBLE EXPOSURE TO MICROWAVE
ENERGY LEAKAGE, THE FOLLOWING ADJUST-
MENT OF THE INTERLOCK SWITCHES SHOULD BE
MADE ONLY BY AUTHORIZED SERVICE PERSON-
NEL.
PRIMARY
INTERLOCK SWITCH,
INTERLOCK
MONITOR SWITCH AND DOOR SENSING SWITCH
ADJUSTMENT
(Figure 1)
(1)
(2)
(
‘-
(3)
(4)
(5)
(6)
Loosen 2 screws securing the lever stopper.
Adjust the lever stopper position so that it is pushed
forward and pull backward until there is about zero
gap between the latch lever and the switch body
on the primary interlock switch and at the same
time there is about zero gap between the door latch
and the switch body on the door sensing switch
when the door latch is securely locked.
Tighten the lever stopper screws securely.
Make sure the interlock monitor switch closes after
the primary interlock switch opens when the door
is opened very slowly, according to “CHECKOUT
PROCEDURE FOR SWITCHES” on page 6.
Make sure the interlock monitor switch opens
before the primary interlock switch closes when the
door is closed very slowly, according to “CHECK-
OUT PROCEDURE FOR SWITCHES” on page 6.
Make sure the microwave energy leakage is below
the limit of the regulations (5mW/cm2 ) when
measured with a detector.
(All service adjustments must be made for minimum
micro wave energy leakage readings. )
NOTE: If the interlock monitor circuit operates and at
the same time the fuse blows with the door
opened, be sure to replace the control circuit
board, because relay 2 on the control circuit
board, the door sensing switch and the electric
circuit related on the door sensing switch,
which act as Secondary Interlock Switch.
Door
Latch
top
lper
Door
Sensing
Switch
Interlock
Monitor
Switch
Interlock
Switch
Figure 1
–l-
2. SPECIFICATIONS
Rated Power Consumption
Microwave Output . . . . .
Frequency . . . . . . . . . . .
Power Supply . . . . . . . .
Rated Current . . . . . . . .
Safety Devices . . . . . . . .
Timer . . . . . . . . . . . . . .
. . .
. . .
. . .
. . .
. . .
. . .
. . .
Overall Dimensions . . . . . . . .
Oven Cavity Size . . . . . . . . .
Turn Table Diameter . . . . . . .
Net Weight . . . . . . . . . . . . .
1,200W
800W
(Adjustable 175W through
800W)
2,450 MHz * 50 MHz
230- 240 V50HZ
6.0 Amp.
Thermal Protector for Cav-
ity, OPen at 122°C Ther.
mal Protector for magne-
tron, Open at 135° C Fuse
(Cartridge Type 8A) Pri-
mary
Interlock Switch
Door Sensing Switch and
Relay 2 interlock Monitor
Switch
Electronic Digital, up to
99 rein, 99 sec.
550(W)
X 453(D) x309(H)
mm
575(W)
X 404(0) X 237(H)
mm
360mm
Approx. 20.Okg
3. POWER OUTPUT MEASUREMENT
(1) Prepare 1000~5g tap water.
(2) Adjust water temperature to 10°*20C.
(3) Pour water into a container made of borosilicate
glass, 190mm outer diameter cylinder, maximum
3mm thickness.
Note: Use the container kept on the room temper-
ature.
(4) Place the container in the center of oven cavity.
(5) Set the heating time for 52 seconds and rating full
power and then Start oven.
(6) Take the container out immediately when heating
time is up.
(7) Stir water for making even water temperature in the
container.
(8) Measure water temperature.
Water temperature rise shall be 8° to 12“C.
4. PRECAUTIONS AND REPAIR SERVICE TIPS
PRELIMINARY
A. SINCE NEARLY 4,000 VOLTS EXISTS IN SOME
CIRCUITS OF THIS MICROWAVE OVEN, REPAIRS
SHOULD BE CARRIED OUT WITH GREAT CARE.
B. TO AVOID POSSIBLE EXPOSURE TO MICROWAVE
ENERGY LEAKAGE,
THE FOLLOWING PRE-
CAUTIONS MUST BE TAKEN BEFORE SERVICING.
(1)
(a)
(b)
(2)
(a)
(b)
Before the power is applied:
Open and close door serveral times to make sure the
primary interlock switch, the interlock monitor
switch and the door sensing switch operate proper-
ly. (Listen for the clicking sound from the switches. )
Make sure the interlock monitor switch closes after
the primary interlock switch is opens when the door
is opened.
(See pages 1 and 6)
Make sure the perforated screen and the choke di-
electric of the door are correctly mounted.
After the power is applied:
Open and close the door to see if the interlock
mechanism operates properly.
Check microwave energy leakage with a leakage
(3)
(a)
(b)
(c)
(d)
(e)
(f)
(4)
(a)
detector and confirm the energy leakage is below 5
mW/cm2 ).
Do not operate the unit until it is completely repair-
ed, if any of the following conditions exists.
Door does not close firmly against the cavity front.
The hinge is broken.
The door ferrite rubber or the door seal is damaged.
The door is bent or warped, or there is any other
visible damage to the oven that may cause micro-
wave energy leakage.
Make sure that there are no defective parts in the
interlock mechanism.
Make sure there are no defective parts in the micro-
wave generating and transmission assembly. (espe-
cially waveguide).
--
Following items should be checked after the unit is
repaired.
The interlock monitor switch is connected correctly
and firmly.
(b) The magnetron gasket on the magnetron is properly
positioned.
(c) Waveguide and oven cavity are intact (no leakage of
microwave energy).
(d) The door can be properly closed and the safety
switches work properly.
(e) The oven must be stopped when the door is opened
or the time is up.
The oven must not be operated with any of the above
components removed or bypassed.
–2–
POWER SUPPLY
0
=
-1
P h
r-
FUSE I
I
8A(T) I
L–+
:
@;
I
w
I
THERMAL PROTECTOR
FOR CAVITY OPEN 122i6°C
~~ (
65011H I
LB
I
r
‘h
n
5. CIRCUIT DIAGRAM
THERMAL PROTECTOR
1
FOR MAGNETRON OPEN
135!5°C
BK
w
w
BK
GEAR MOTOR I
-1-
W
:OM
I
Uo
w
BLOWER MOTOR
r-t’-
HIGH VOLTAGE TRANSFORMER
~_–—
——__ ____ ____
1
.——
1
w
la
● .
i
Bk
I
I
—
!llV
~
r-- ——-. —____
~ :~NNECTOR ,
2
11
RELAY 2 (
~––T
I
j: yRELAy~%@
CONNECTOR
I
———
I
I
I
r
/
--————
n
I
El”
/
I
I
-1
——————
&J
R
MAGNETRON
-
h i,
la
RELAY 1
S102 ‘
STEP DOWN
TRANSFORMER
~——–.~ I
10
@
I
CONTROL
III
CIRCUIT
;
/
/
BOARD
I
I
I
c
I
CONNECTOR
TOUCH
/
●1
Slol
KEY
BOARD
/
i-
L–––—J
———- ———— ———— ———
-1
HIGH VOLTAGE
DIODE
❑
Notes: The sign ~ -
•1
The parts marked with ~ are supplied
high voltage which is exceeded 250V.
WIRING COLOR
BK :
BLACK
‘BR: BROWN
The sign @ -
w
: WHITE
GY :
GRAY
o
: ORANGE
BL :
BLUE
R
: RED
The parts marked with @ have special
characteristics important for microwave
leakage. When replacing any of these parts
use only manufacturer’s specified parts.
Figure 2
–3–
6. TEST PROCEDURES AND TROUBLESHOOTING
Filament Windings
/
CAUTION
- DISCONNECT THE POWER SUPPLY CORD
FROM THE WALL OUTLET WHENEVER RE-
MOVING THE CABINET FROM THE UNIT, PRO-
CEED WITH THE TESTS ONLY AFTER DIS-
CHARGING THE HIGH VOLTAGE CAPACITOR
AND REMOVING THE LEAD WIRES FROM THE
PRIMARY WINDING OF THE HIGH VOLTAGE
TRANSFORMER. (SEE FIGURE 3)
A.TEST PROCEDURES
Figure 3
–4–
w
COMPONENT
CHECKOUTPROCEDURE
RESULT
Measure the resistance: Across two terminals
Normal reading:
with an ohm-meter on highest scale.
Momentarily indicates several ohms, and
gradually returns to 10 meg-ohms.
Abnormal reading:
HIGH-VOLTAGE
Indicates continuity or 10 meg-ohms from
CAPACITOR
Wm
the beginning.
including
BLEEDER
ohm-meter
a
RESISTOR
Figure 7
Measure the resistance. Across two terminals
Normal reading:
with an ohm-meter on R x 10,000 scale. Indicates about the middle position in one
direction (forward direction) and infinite
ohms in the reverse direction, using meter
H
which is provided with a 9-volt battery.
ohm-meter
NOTE
HIGH-VOLTAGE
‘L
– Some digital meter may show over even
DIODE
~e” 0
in a forward direction because low measur-
ing voltage of meter does not allow the
meter current to pass through the high
voltage diode.
Figure 8
Abnormal reading:
Indicates continuity or infinite ohms in both
directions.
Measure the resistance: Across two terminals
Normal reading:
with an ohmmeter on highest scale.
Indicates infinite ohms in both directions.
‘ad
Abnormal reading:
Ohm-meter
Indicates continuity in both directions or
FUSE DIODE
continuity in one direction and
infinite
,< /- —-,
ohms in reversed direction.
/ ‘,-.//
Am
/
/
Figure 9
Measure the voltage: Between test points
TP-1, TP-2 or TP-3 and ground or between
7
TP-4 and TP-5. (See control circuit board on
Test
TP- 1
TP-2
TP-3
TP-41
Point
TP-5
page 19)
CONTROL
-5V
-12V
–30V
2.OV
CIRCUIT BOARD
NOTE
Voltage DC
Dc Dc
AC
i
Proceed with the check of the step-down
transformer, to see if any one of the measur-
ed values is different from the specified
values.
–5–
CHECKOUT PROCEDURE FOR SWITCHES
Disconnect the lead wires from the switches and check for the continuity of the switches connecting an ohmmeter to its termi-
nals.
SWITCHES
(See Figure 1 on page 1)
CHECKOUT PROCEDURES
DOOR OPEN
DOOR CLOSED
Primary Interlock
Term\nals “COM” and “NO”
Door Sensing
o a
Interlock Monitor
Terminals “COM” and “NC”
Q Q,
CAUTION: After checking the switches, make sure that the interlock monitor switch is properly connected according to the
CIRCUIT DIAGRAM on page 3.
–6–
B. TROUBLESHOOTING
STEP
SEQUENCE
RESULT
1)
PROBLEM
I
I
1
~odlsplayor misdisplay In
,hedtisplay wtndowby touch
ng the keys.
I
I
al
Check 120 VAC power supply
through fuse (1 5A).
thermal Protector for cavity
I
o
I
O 240
@
,,,
?
I
I
dgij)
I
o
volt
Check continuity of fuse
Replace it
I
Runs
thermal protector for
If necessary.
I
cavity, thermal protector
I
for magnetron and AC Power
I
I
cord. If the fuse is below.
I
See “F. REMOVING
I
FUSE” on page 13.
I
,
i~
PROBLEM
and thermal protector for ma-
1
l-b
l}
—
gnetron.
240 volt
i
I
1
I
b
I
Control
clrcult board
}
Check power supply voltage
on control clrcull board
(See page 5)
Touch key board
1
000
000 “
000
Each voltage
Check resistance of
OK
touch key board.
(See page 6)
i
($)
1
I,’”
I
‘@
I
Each resistance Correct sealing of
Normal control I Runs
OK connector S101 or
circuit board
I
replace control
:
circuit board.
I
I
I
I
b,
@
❑00
1#
‘ 000
000
‘@)
I
I
Resistance
Replace touch key
Normal touch
I
I
Runs
Incorrect board.
key board
I
(ON or OFF)
I
i
I
STEP
SEQUENCE
RESULT
I
+
!) PROBLEM
ooking operation will not
art.
a
CHECK: 1. Power Supply to Oven
2. Primary Interlock Switch
3. Thermal Protector for Magnetron
and thermal protector for cayity.
r@H?-
Door sensing switch
I
Continuity
Check contact
(-) , OK
of connector
S102.
—
I
I
I
I
I
I
al
i
I PROBLEM
3-a
I
Contact
I
I
OK
I
1
I
I
I
I
1
iitz
-m’—@–m
I
I
J@
Check continuity of con-
nector S102 between Pins
Correct
I
Poor
Normal
(O and BL) with the door
contact
seating. contact
closed after removing
connector S102 from
control circuit board.
@ ~–> $J
No
Adjust or replace
Normal door
I
Runs
continuity
door sensing switch.
sensing switch
i
(See page 1)
I
,
[3) PROBLEM
Oven does not heat up.
I
I
I
I
Fe
I PROBLEM
I
3b
I
o-l
AC 240 Volts
v
I
I
I
I
I
I
Touch START key and
Lo
i
measure voltage between
()
240
@
I
white wire lead and black.
f
i
I
wire lead for primary
I
winding of H.V. trans-
0 volts
Replace control
Normal control I
Runs
former-after removin~
circuit board.
the wire leads from
circuit board 1
I
terminals of H.V. trans-
1
former
I
-
I
I
I
Y’
(
(
STEP
SEQUENCE
RESULT
I
1
-J
b
H.V. transformer
Check resistance of
each winding after
removing lead wires,
(See page 4).
~
Resistance
Check H. V. capacitor or H.V.diode
OK
with an ohm-meter after removing
Ieadwlres, (!3ee Page5)
@ f$+-(g)
Normal H.V,
Replace
Normal
I
I
R;ns
capacitor or
magnetron.
magnetron. ,
H.V, diode
I
Defective
Replace H.V. Normal H.V. ~
Runs
H.V. capacitor or
capacitor or
capacitor or
H.V. diode
I
e
H.V. diode. H.V. diode I
@
1.’”.
I
‘@
I
Resistance
Replace H.V.
Normal H.V.
i
Runs
Incorrect.
transformer.
transformer
I
I
,4) PROBLEM
1
Low microwave power
I
I
)Utput,
1 A
I
I pROBLEM
-1
a
$iii?+
Normal
.,. operation
Check operallon of
blower mo!or when
START key IS
~ouched
@-M-
No
operation
Temporarily short
across terminals
of thermal protectc
for magnetron and
thermal protector
for cavity by using
jumper lead.
-Q)+)-= ;.
I
I
I
6
Normal Replace thermal
operation protector for
magnetron and
thermal protector
for cavity.
No
Measure resistance
operation
of blower motor
Approx. 215 ohms.
Normal thermal
I=&
protector for
I
I
magnetron and thermal protector for cavity.
I
Reisstance
Replace blower
incorrect.
motor.
Normal blower ~
Runs
motor.
I
I
I
i
@
I .“/
I
@
I
Normal Replace control Normal contrcl ~
Runs
resistance circuit board.
circuit board. I
I
“2
$
w
K
1
(
I
(
I
>
x
L
B!ln
1
m
I
---
---- ----
—------
-----
m
–lo–
7. DISASSEMBLY INSTRUCTIONS
● OVEN MUST BE DISCONNECTED FROM ELECT-
RICAL OUTLET WHEN MAKING REPLACEMENTS,
REPAIRS,
ADJUSTMENTS AND CONTINUITY
CHECKS BEFORE PROCEEDING WITH ANY RE-
REPAIR WORK AFTER DISCONNECTING. WAIT AT
LEAST 1 MINUTE, UNTIL THE CAPACITOR IN THE
HIGH-VOLTAGE AREA HAS FULLY DISCHARGED.
● WHEN REPLACING ANY DOOR MI CR OSWITCH,
REPLACE WITH THE SAME TYPE SWITCH SPECIFl-
ED ON THE PARTS LIST.
A. REMOVING DOOR SENSING SWITCH
(Figures 1 on page 1, n-a)
(1) Disconnect all wire leads from the door sensing
switch. (Figure 1 on page 1)
(2) Remove 2 screws securing the lever stopper.
(3) Push the door sensing switch upward while pressing
adjacent upper switch stopper of lever stopper and
lower switch stopper down (Figure 1l-a).
(4) Then remove it by lightly pressing the switch to-
ward you. (Figure 1 l-a).
(5) Make necessary adjustments or replacements of the
door sensing switch by reversing step (3) and check
microwave energy leakage according to “ 1. AD-
JUSTMENT PROCEDURES” on page 1, after it is
replaced with new one, and check proper operation
of it according to “CHECKOUT PROCEDURE
FOR SWITCHES” on page 6.
1
\-
DOOR
SENSING
SWITCH -
Upper
Switch
Stopper
Lower’
Switch
Stopper’
Figure Ii-a
B. REMOVING PRIMARY INTERLOCK SWITCH AND
INTERLOCK MONITOR SWITCH
(See
Figure 1l-b).
(1) Disconnect all wire leads from primary interlock
and interlock monitor switch.
(2) pull the primary interlock switch or interlock
monitor switch upward at the same time while
pushing the switch stoppens to allow a space be-
tween the switch body and catches.
(3) Make necessary adjustments or replacement of
switch by the reversing step (2) and check micro-
wave energy leakage according to “ 1. ADJUST-
MENT PROCEDURES” on page 1, after it is re-
placed with new one, and check proper operation
of it according to
“CHECKOUT PROCEDURE
FOR SWITCHES” on page 6.
Switch Stoppers
JI
c
Interlock
Monitor
- Switch
Primary
%$ 1[ switch
Interlock
Switch stoppers
Figure Ii-b
Interlock Switch Replacement – when replacing
faulty switches, be sure switch mounting tabs arc not
bent, broken or otherwise deficient in their ability
to secure the switches in place.
–11–
—:
C. REMOVING BLOWER MOTOR
(Figures 12 (ToP View) and 13)
(1) Remove screw securing the stay.
(2) Disconnect all lead wires from the blower motor
and H.V. capacitor,
(3) Remove 2 screws securing the blower base and
disengage 3 hooks from the rear plate of cavity
(Figure 12).
(4) Remove 1 screw securering the blower motor with
the blower base.
D. REMOVING MAGNETRON
(Figure 11 (ToP View))
After removing the blower motor:
(1) Remove duct (msg. intake) and duct (msg. exhaust).
(2) Remove 2 screws securing the thermal protector.
(3) Disconnect 2 lead wires from the magnetron.
(4) Remove 3 screws securing the magnetron to the
waveguide.
(5) Take out magnetron VERY CAREFULLY’
NOTES
- When removing the magnetron, make sure that
its dome does not hit any adjacent parts, or it may
be damaged.
- When replacing the magnetron, be sure to install
the magnetron gasket in the correct position and be
sure that the gasket is in good condition.
– After replacthg the magnetron, check for micro-
wave energy leakage with a leakage detector.
Microwave energy leakage must be below the limit
of 5 mW/cm2.
Duct (msg. exhaust)
Blower base
\ I
Stay
Duct (msg. intake)
Figure 12 (Top View)
Screw
\
ks
Blower Motor
v
Screws
Figure13
–12–
E. REMOVING FUSE
Remove the 8A fuse with a screwdriver.
NOTES
– When replacing the 8A fuse, be
exact repair part.
sure to use an
– If the 8A fuse blows immediately, check the
primary interlock switch, the relay 2 (on the control
circuit board) and the interlock monitor switch
according to
“CHECKOUT PROCEDURE FOR
SWITCHES” on page 6. And make sure to check the
microwave energy leakage according to “1. AD-
JUSTMENT PROCEDURES” on page 1, when the
primary interlock switch, the relay 2 or the inter-
lock monitor switch is adjusted or replaced.
– If the primary interlock switch, the relay 2 and
the interlock monitor switch operate properly,
determine which of the followings is defective:
control circuit board, blower motor, gear motor,
high voltage transformer, high voltage capacitor,
high voltage diode or magnetron.
– If the high voltage diode is defective, replace not
only the high voltage diode but also the fuse diode.
F. REMOVING CONTROL CIRCUIT BOARD
(See exploded view on page 18 and Figure 14)
(1)
(2)
(3)
(4)
(5)
Remove the connector S1, S102 and the connector
for the relay 2 from the control circuit board.
Remove 1 screw securing the control panel com-
plete to the oven cavity.
Remove the FPC connector from the connector
S101 while grasping up both lever ends of the
plastic fastener.
Remove 2 screws securing the control circuit board
to the control base.
Lift up the control circuit board from its lower side
and take it out from the control base.
-
G. REMOVING TOUCH KEY BOARD
(Figure 15)
After removing the control circuit board;
(1) Remove control base while lifting it up at the right
side and take it out from the control frame.
(2) Remove control sheet which is glued to touch key
board.
(3) Remove the touch key board which is held on the
control base bracket with the adhesive tape.
Con
Control Base
Control Frame
Figure 14
trol Sheet
Touch
Key Board
Figure 15
–13–
H. REMOVING DOOR
J.
REMOVING STIRRER FAN
(1) Remove 2 hex nuts securing the upper hinge.
(2) Tilt the top of the door toward you.
(3) Lift up the door to remove it.
NOTES
—
After replacing the door, be sure to check that
the primary interlock switch, the door sensing
switch and, the interlock monitor switch operate
normally. (See page 1)
—
After replacing the door, check for microwave
energy leakage with a leakage detector. Microwave
energy leakage must be below the limit of 5 mW/
cm2.
DISASSEMBLING DOOR
(Figure 15)
(1)
(2)
(3)
(4)
Insert a thin flat-blade
choke dielectric and the
up the choke dielectric
one. (Figure 16)
screwdriver between the
door main frame and lift
to release hooks one by
Remove the choke dielectric.
To detach the door cover, Insert a thin flat-blade
screwdriver between door cover and the door panel
and release the projections inside door cover.
To detach the door Panel, Insert a thin flat-blade
screwdriver between the door cover and door main
frame.
Hooks
NOTES
The choke dielectric may be
damaged when it is
removed. When reinstalling it replace it with new
ones if they are damaged.
—
After installing the door in place, check for
microwave energy leakage with a leakage detector.
Microwave energy leakage must be below the limit
of 5 mW/cm2.
(Figure 17)
(1) Release the 3 hooks of stirrer cover while pushing
them downward at the front of the cavity top.
(2) Remove the stirrer cover from the hooks at the rear
side of the cavity top pulling it toward you.
Stirrer A’ssy
/
o
II
Stirrer Cover
Figure 17
K. REMOVING TURNTABLE MOTOR COVER
(Figure 18)
(1)
(2)
(3)
(4)
Turn over the oven on its back.
Cut the 6-joints of the bottom plate using diagonal
pliers (nipper).
Separate the motor cover from bottom plate.
Remove 2 screws securing turntable motor to the
cavity and take it out.
Note: Bent the cut joints inside slightly for safety
and be careful of sharp edge.
Motor Cover
6 Joints
I
Bottom Plate
Figure 18
–14–
8. EXPLODED VIEW AND PART LIST
CAVITY PARTS
Key
No.
1
2
3
4
5
6
7
8
9
10
● ☛☛
11
~\
t
2
6
ALL SERVICE ON MICROWAVE OVENS SHOULD BE PERFORMED BY A QUALIFIED TECHNICIAN
USING APPROVED TESTING EQUIPMENT. CUSTOMERS SHOULD NOT ATTEMPT TO REPLACE PARTS
IDENTIFIED BY ATRIPLE ASTER ISK(***)
—
Part No.
6171246377
411 0825201
4110854102
6171307450
6171246391
6170561600
4110110802
6171240795
411 0892500
6171305616
Desmiptiorr
Cabinet (Also order Circuit Diagram-
when replacing Cabinet. )
Screw, Truss Hd. Tapping, 4 x 10mm
Lockwasher, External Tooth,
4mm, U
Oven Cavity”
● ‘
(Not service Part)
Bottom Plate’
● ●
Plastic Foot with Canoe Clip
Bolt, Hex. Hd. Machine with Spring
Washer & Bolt Washer, 5 x 14mm,
~, . . .
Hinge Lower* ‘“
Washer, 5mm, U
Gear Motor
Q’ty
1
10
2
1
1
4
2
1
1
1
Key
No.
11
12
13
14
15
16
17
18
19
20
21
●
.
Part No.
411 001 4704
6171147162
6171242416
6171098372
411 0076900
6171241235
6171307481
6171265484
6171208481
6171325720
6171419887
6171385090
Description
Screw TPG Pan 4 x 10mm
Turn Table Shaft
Roller
Rotating Tray
Screw, Pan Hal., Tapping, 3 x 6mm,
C2-2
Thermostat, Cavity 122C
Stirrer Cover
Stirrer A’ssy
Insulation Sheet
Insulation Sheet
Name plate
Circuit Diagram
rl’ty
2
1
1
1
1
1
1
1
1
1
1
1
* Items not illustrated.
15
SWITCHES AND MICROWAVE PARTS
~,...
1
.N%l ‘“
Notes:
10
/
The parts marked wirh ~ are supplied
~
h!gh voltay wh,ch is exceeded ZSOV.
13--W ,/
The
parts marked wish @ ha.e speed
1
charamersstm important fw mtcrowave
leakage. When replacing any of these paru
US8 only manufacturer’s swcified X5.
● ** ALL SERVICE ON MICROWAVE OVENS SHOULD BE PERFORMED BY A QUALIFIED TECHNICIAN
USING APPROVED TESTING EQUIPMENT. CUSTOMERS SHOULD NOT ATTEMPT TO REPLACE PARTS
IDENTIFIED BY A TRIPLE ASTERISK***)
<ey
Part No.
Description
Q’ty
No.
1
4110825201
Screw, Truss Hd. Tapping, 4 x 10mm
5
2
6171305661
Power Supply Cord Complete
1
3
6171306941
High Voltage Transformer,
1
H5T-800SAP
4 6171289718
Duct, Msg. Inlet
1
5
6171246582
Stay, Cavity & Magnetron
1
6 411 0076900
Screw, Pan Hd. Tapping, 2
3 x
6mm C2-2
7
6171241259
Thermostat, Magnetron, 135C0 1
8 4150019301
Magnetron, 2M218H(N)*”0
1
9 1111111111
Fuse, 250V 8A
1
10 6171414042
P.C.B Complete
1
11
6171170023 Lead Wire Ass’y with Diode
1
12 6171315868
Laed Wire Ass’Y {Transformer to
1
Capacitor)
13
6171241334
Capacitor Band
1
14
6J7 1306934
High Voltage Capacitor including
1
Resistor, 0.97uf 2.4KV
15
6171241082
Space partition (Blower)
1
16
6171306927
Blower Motor
1
17
411 0772109
Scrm, Truss Hd. Tapping,
2
4x20mm, Z1-1
18
6170751179
Blower Fan
1
Key
Part No.
No.
Description
Q’ty
19
411 011 5609 Bolt HEX C-SCT4
X 20
3
20
6171241075 Duct, Msg. Exhaust
1
21
6171103618
Lamp, 240V 25W
1
22
6171241280
Lamp Socket
1
23 6171241181 Latch Lever*’*
1
24
6171242294
Micro Switch, Primary Interlock
1
V-5130D***
25
6170045575
Micro Switch, Interlock Monitor
1
V-5220 DZ’*’
26
6171124583
Micro Switch, Door Sensing
1
V-523 D-103***
27 6171241174
Lever Stopper***
1
28
6171241198
btch Lever”*” 1
29
411 1102608
Screw, Pan Hd. Tapping + TW,
2
4x 12mm, 21
30 4120182004 Bolt Hex C-SCT 5 x 16
2
31 411 0081607
Spring Washer 4 mm
1
32
4110014704
Screw, Pan Hd. Tapping, 4 x 10mm, 1
21
33 4110541903
Nut Hex + FLG W/SRT5
2
34
6171325713
Insulation sheet
1
–16-
.... ......... . .. .. .:.:..
DOOR PARTS
.-
‘6
4***
..
.
-— -
‘i
-.
● ☞✍
ALL SERVICE ON MICROWAVE OVENS SHOULD BE PERFORMED BY A QUALIFIED TECHNICIAN
USING APPROVED TESTING EQUIPMENT. CUSTOMERS SHOULD
NOT AITEMPT TO REPLACE PARTS
identified By ATRlp LEAST= RIS~(*”*)
Key
Patt No.
Description
a’ ty
Key 1
Pat No.
Desc:iptiOn
0’ t’f
No.
No.
1
6171246469
Door
Cover” “.
1
2
6171246476
Ooor Panel
● “”
1
3
6171246414
Door Main Frame””” (Also order
1
Spring Washer and Bolt Washer,
Ooor
Sheet when replacing Ooor
5x 14mm, Zl ”””
Main Frame)
9 6170806503
Rivet”””
2
4 6171246490
Choke Dielectric” “.
1
10
617101 1494
Spring”””
1
5
6171246483
Ooor Sheet.”.
1 11 617101 1487
Ooor Latch”
● ●
1
A
-17–
.—
CONTROL PANEL PARTS
6
8
7 ●**’\‘i \
4**+
\
3 .**
1
● **
1
“\
\ $3”
\
11 ● **
● ** ALL SERVICE ON MICROWAVE OVENS SHOULD BE
USING APPROVED TESTING EQUIPMENT. CUSTOMERS
IDENTIFIED BY A TRIPLE ASTERISK***)
PERFORMED B’f A QUALIFIED
TECHNICIAN
SHOULD NOT ATTEMPT TO REPLACE PARTS
Key
NO.
1
2
3
4
5
Part No.
Description
Q’ty
6171307535
ControlSheet
(Also order 1
Touch Key Board when replacing
Control Sheet) 1
6171307542
Touch Kay Board” ”*(Aslo order
1
Control Sheet when replacing
Touch Key Board)
6171246629
Control Plate’”* 1
6171246643
Control Frame””
●
1
4110854102
Lockwasher, External Tooth, 4mm
1
PRINTED MATTER (Items Not Illustrated)
Key
Part No.
Dasctiption
No.
C1’ty
6171305753 0peratin9 Instructions
1
6171419962 Carton BOX
1
Key
No.
Part No.
I
Description
arty
I
6
7
B
9
10
11
4110825201
6171241129
6171294965
411 1295805
6170809559
6171246612
Screw, Truss Hd. Tapping,
4x 10mm, U1-1
Control Base’
● *
Control Circuit Board Complete
Screw, Bind Hd. Tapping,
3 x 10mm, ZK-1
Spring, Door Release Lever*”’
Ooor Release Lever*’
●
1
1
1
2
2
1
I
I
I
I
–18–
.’.
CONTROL CIRCUIT BOARD
(Part No. 617129 4965)
TP-1 —
LC6183
I
I if- C107
12
++ODIO’
1
J
Jive
----
0. _____
.JIvl
----
‘N WFS1 ~
Rll 1*-
I - 1!
— TP-3
_ TP-2
—1
\.\
Ground
–19–
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