5ERVICE MANUAL Microwave oven
siq#Miilo
EM 710 FS (Newz-iand
January 161992
PRODUCT CODE NO.
432-318-51
I
Foreword
Read this manual carefully, especially precaution on microwave energy, and follow the pr~edure strictly. Careless servicing and
testing may expose yourself to the microwave energy leakage.
1
PRECAUTIONS
PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO AVOID POSSIBLE EXPOSURE TO EX-
CESSIVE MICROWAVE ENERGY
(a) Do not operate or allow the oven to be operated with the door open.
(b) Make the following safety checks on all ovens to be servlce[i 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.
(c) 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.
(d) Any defective or misadjusted components in
the interlock, monitor, door seal, and microwave generation and trans.
mission systems shall be repaired, replaced, or acfiusted by procedures described in this manual before the oven is released
to the owner.
L
REFERENCE NO. WM-640 206
– TABLE OF CONTENTS –
Adjustment Procedures . . . . . . . . . . . . . . . . . . . ...1
Test Procedures and Troubleshooting . . . . . . . . . . 4–ICI
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . ...2
Disassembly Instructions . . . . . . . . . . . . . . . . . 11-14
Power Output Measurement . . . . . . . . . . . . . . . . . . . 2
Exploded View and Parts List . . . . . . . . . . . . . . 15-2(J
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 belween 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 enrgy leakage is below the
limit of the regulation (5 mW/cm* ) when measured
with a detector. (A//
made for minimum
readings. )
service adjustments must be
micro wave energy leakage
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
/
-----
Stopper
I
Screws
Door
Sensing
Switch
Interlock
Monitor
Switch
/“
Latch Lever
Primary
Interlock
Switch
Figure 1
–l–
2. SPECIFICATIONS
Rated Power Consumption . . . . 1200W
Microwave Output . . . . . . . . . 700W
(Adjustable 155W through
700W)
Frequency . . . . . . . . . . . . . ..2.45(l MHz~50 MHz
Power Supply . . . . . . . . . . . . 230 V- 240 V50HZ
Rated Current . . . . . . . . . . . . 5.4Amp.
Safety Devices . . . . . . . . . . . . Thermal Protector for
Cavity, Open at 122°C
Thermal Protector for
Magnetron , Open at 135°C
Fuse (Cartridge Type 8
A)
Primary Interlock Switch
Door Sensing Switch and
Relay 2
Interlock Monitor Switch
Timer . . . . . . . . . . , . . . . . . . Electronic Digital, UP to
99 min. 99 sec.
~vera[[ Dimensions . . . . . . . . . 525(W)X4 \9(D)~281 (H)
mm
Oven Cavity Size . . . . . . . . . . 350( W) X371( D) X209(H)
mm
Turn Table Diameter . . . . . . . . 340mm
Net Weight . . . . . . . . . . . . . . Approx. 17. Okg.
3. POWER OUTPUT MEASUREMENT
(1) Prepare 1000t5g tap water.
(2) Adjust water temperature to 10°f20C.
(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 tempe-
rature.
‘4) Place the container in the center of overr cavity.
‘%5) Set the heating time for 60 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
B.
CIRCUITS OF THIS MIcROWAVE OVEN, REPAIRS
SHOULD BE CARRIED OUT WITH GREAT CARE.
TO AVOID POSSIBLE EXPOSURE TO MICROWAVE
ENERGY LEAKAGE,
THE FOLLOWING PRE-
CAUTIONS MUST BE TAKEN BEFORE SERVICING.
(1)
(al
(2)
(a)
(b]
(3)
(a)
(b)
(c)
(d)
(e)
(f)
(4)
(a)
(b)
(c)
(d)
(e)
The
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 arid close the door to see if the interlock
mechanism operates properly.
Check microwave energy leakage with a leakage
detector and confirm the energy leakage is below 5
mWfcm2.
Do not operate the unit until it is completely re-
paired, if any of the following conditions exists.
Door does not close firmly against the cavity front.
The hinge is broken.
The choke dielectric 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.
NOTE: Always keep the seal clean.
Make sure that there are no defective parts in the
interlock mechanism.
Make sure that there are no defective parts in the
microwave generating and transmission assembly.
[especially waveguidej
The following items should be checked after the
unit is repaired:
The interlock monitor switch is connected correctly
and firmly.
The magnetron gasket on the magnetron is properly
positioned.
Waveguide and oven cavity are intact (no leakage of
microwave energy).
The door can be properly closed and the safety
;witches work properly,
I_he oven must be stopped when the door is opened
>r the time is up.
oven must not be operated with any of the above
components removed or bypassed.
–2–
5. CIRCUIT DIAGRAM
.1
POWER StJPpLY
0
=
AA 4
)
CAVITY LAMP
w
w
BK
THERMAL PROTECTOR
?I
FOR MAGNETRON OPEN
GEAR MOTOR
13515° C
(
I
c
n
BK
f
@
&T;~o;CK
@ ;:;;;:::
SWITCH
f \
o SWITCH
NC ~
COM
BLOWER MOTOR
HIGH VOLTAGE TRANSFORMER
r
————— —— __ ———— —-
1
BK
COM
\
NO
I
F- —— ---— .—-— —— __
—-—
w
I
● n
I BK
\ ~yNNECTOR ,
1~
I
—
2
(
RELAY 2
I
I
I ~
i
I
I
-i
I
I
I
————— —————— ————
BK
WIRING COLOR
cl-
Notes: The sign $
BK :
BLACK
BR : BROWN
The sign @ -
w
:
WHITE
GY : GRAY
o
:
ORANGE
BL :
BLUE
R
: RED
HIGH VOLTAGE
OIODE
❑
The parts marked with $ are supplied
high voltage which is exceeded 250V.
The parts marked with @ have special
characteristics important for microwave
leakage. When replacing any of these parts
use only manufacturer’s specified parts.
-3–
Figure 2
.
i
Filament Windings
6.TEsT
PROCEDURES AND TROUBLESHOOTING
CAUTION
- DISCONNECT THE POWER SUPPLY CORD
FROM THE WALL OUTLET WHENEVER REMOV-
ING THE CABINET FROM THE UNIT. PROCEED
WITH THE TESTS ONLY AFTER DISCHARGING
THE HIGH VOLTAGE CAPACITOR AND RE-
MOVING THE LEAD WIRES FROM THE PRl-
MARY WINDING OF THE HIGH VOLTAGE
TRANSFORMER. (SEE FIGURE 3)
A.TEST PROCEDURES
Fioure 3
–4–
J
COMPONENT
CHECKOUT procedure
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
CAPACITOR
Indicates continuity or 10 meg-ohms from
Wfi
~
the beginning.
including
BLEEDER
ohm-meter
Q
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
/
m
which is provided with a 9-volt battery.
ohm-meter
6Y
NOTE
HIGH-VOLTAGE
– Some digital meter may show over even
DIODE
“0 ;--m&
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.
/
A
m
Abnormal reading:
Ohm-meter
Indica[es continuity in both directions or
FUSE DIODE
continuity in one direction and
infinite
ohms in reversed direction.
Figure 9
Measure the voltage: Between test points
TP-1, TP-2, or TP-3 and ground or between
TP-4 and TP-5. (See control circuit board
Test
TP- 1
TP-2
TP-3
TP-4/
on page 19)
Point
TP.5
CONTROL
-5V
–12V –30V
CIRCUIT BOARD
Voltage Dc
2.OV
NOTE
DC DC
AC
4
- 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-
‘..
-.
.-,.
.
COMPONENT
I
TOUCH KEY
BOARD
CHECKOUT PROCELURE
—
Measwre the resistance between terminals of
FpC connector after removing it from S101.
(Figure 10)
-c
—
When reconnecting the FPC connector,
make sure the holes on the connector are
properly in~erted
in hooks of the plastic
fastener in S101.
MATRIX CIRCUIT
FOR
TOUCH KEY BOARD
FPC CONNECTOR
.——
---- ——
——— ——
——— ——. —
7
I
0
6 5
POWER
TABLE
c1 /
OFF
01
.
-
11
AUTO
7
)
DE F-
QUICK
IC21
1
ROST
SET
10!
I
I
w
II
AUTO
HOLD
112
8
)
WARM
10
C3 ,
/
.
.
w
w
;13
9
HE LTH’.’
y
/ ‘
/’/f
COOK
START
IC41
10:
.
I
II
STOPI
I
TIME
JTIME oF
4
CLEAR
DAY
;C5;
lo
A
w
L_;
.
!
RESULT
Resistance
value
M
When checking “START” key, connect ohm-
meter as illustration below.
ohm-meter
FEES
Al
A2
A3
)
TERMINALS OF FPC CONNECTOR
Figure 10
‘C-
HECKOUT PROCEDURE F. S,’, ‘CHES
Disconnect the lead wires from the switches anc :
heck for the continuity of the switches connecting an ohm-meter to its termi-
nals.
I
SWITCHES
(See Figure 1 on page 1)
CHE .JUT PROCEDURES
DOOR OPEN
DOOR CLOSED
Primary Interlock
Terminals “COM” and “NO”
Door Sensing
!0
Q
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
J
(1) PROBLEM
Nodlsplayormis-display (n
Ihedlsplay wlndowby touch-
ing the keys.
al
o
v
Check 240 VAC power supply
through fuse (8A) and
thermal protector for cavity.
I
I
I
-cl
I
O 240
,t,
f
@
I
I
@
I
o
Voll
Check continuity of fuse,
Replace it
I
Runs
thermal protector for If necessary.
I
cavity, thermal protector
I
for magnetron and AC
I
Power cord. If the fuseis
I
I
below. See “F. REMOVING
I
FUSE” on page 13.
I
I
[ PROBLEM
I
lb
1’
240 volt
I
I
I
1
I
1
J
b
Touch key board
.
nom
000
‘
000
Control
c!rcult board
t
Check powe~ supply voltage
on control circuit board
(See page 5)
Each voltage
Check resistance of
OK
touch key board.
(See page 6)
I
(Q
I ,’”
I
‘(6J
I
Each resistance Correct seating of
Normal control I
OK
connector S101 or
circuit board
I
I
replace control
I
circuit board,
I
I
I
Runs
,
I
1=
\a,
@
000
000 ‘
000
I
‘@
I
Resistance
Replace touch key Normal touch
I
I
Runs
Incorrect
board.
key board
(ON or OFF)
/
I
I
I
@
I .’”
I
‘@
I
Voltage Replace control
Normal control ~
Runs
tincorrect
circuit board, circuit board
I
I
i
I
‘,
I
.(,
1“’.
STEP
4
21 PROBLEM
I
=,:::::::~:ch
3. Thermal Protector for Magnetron &
Thermal Protector for Cavity.
Door sensing switch
m
0
e
Check continuity of con.
nector S102 between Pins
(O and EL) with the door
closed after removing
connector S102 from
control circuit board.
SEQUENCE
J
RESULT
I
I
I
I
!
1
-@-e
Continuity
Check contac[
OK
of connector
S102.
al
1-
; PROBLEM
3a
I
Contact
I
I
OK I
I
I
1
I
I
Poor
Correct
Normal
I
(a, ~&
No
Adjust or replace
I
Normal door ,
Runs
continuity
door sensing switch.
sensing switch
i
(See page 1) 1
3+-(D
(3) PROBLEM
Oven does not heat up.
i
I
I
O
240
I‘ pROBLEM
a
f
I
3b
I
~Q
AC 240 Volts
I
I
w
I
I
I
Touch START key and
I
I
measure voltage between
0 240
@
n/
!
I
‘@
.
white wire lead and black.
wire lead for primary
I
I
winding of H.V. trans-
0 volts
former after removin~
Replace control
Normal control;
Runs
the wire leads from
circuit board.
circuit board
terminals of H,V. trans-
:
I
former.
I
/
!“
i
-J
.— —-- -
-1 -1
---- ---- -— _- ---- ---
---- -
-—.
I
t
-— -- -- —-- -— __ _____ ____
i
I
I
1
—— i
c
. 0
I
&
.,
)
. .
1
n
1
m
–9–
STEP
(
SEQUENCE
(
RESULT
(5) PROBLEM
1
I
The magnetron operates on
high level when a lower cook
power is selected.
b]
H.V. transformer.
Voltage cycles
on and off.
I
I
I
I
I
No problem.
Measure water
temperature
rise exactlv.
I
F!!!!!l
m
49-
Touch START key and
I
Set power level
measure voltage between
@
1:
I .’”.
at “50”.
white wire lead and black
I
@
wire lead for primary
I
I
I
winding of H.V. trans.
former after removing
the wire leads from
terminals of H.V,
transformer.
240V
Replace control Normal control ;
Runs
circuit board,
I
Circuit board ,
I
I
I
I
I
1
1
!6) PROBLEM
Qo buzzing by touching keys
I
I
md at the end of cooking.
I
I
I
J
a
Check normal operation
of control circuit board.
Replace controi
Normat control
i
Runs
clrcult board.
circuit board
I
I
i
I
1
I
I
I
I
1
.1
7.
●
●
A.
DISASSEMBLY INSTRUCTIONS
B. REMOVING PRIMARY INTERLOCK SWITCH AND
OVEN MUST BE DISCONNECTED FROM ELECT-
RICAL OUTLET WHEN MAKING REPLACEMENTS,
REPAIRS, ADJUSTMENTS
AND CONTINUITY
(1)
CHECKS BEFORE PROCEEDING WITH ANY RE-
REPAIR WORK AFTER DISCONNECTING. WAIT AT
(2)
LEAST 1 MINUTE, UNTIL THE CAPACITOR IN THE
HIGH-VOLTAGE AREA HAS FULLY DISCHARGED.
WHEN REPLACiNG ANY DOOR MICROSWITCH,
REPLACE WITH THE SAME TYPE SWITCH SPECIFl-
(3)
ED ON THE PARTS LIST.
REMOVING DOOR SENSING SWITCH
(Figures 1 on page 1, Ii-a)
INTERLOCK MONITOR SWITCH
(See Figure 1 l-b)
(1)
(2)
(3)
(4)
(5)
Disconnect all wire leads from the door sensing
switch. (Figure 1 on page 1)
Remove 2 screws securing the lever stopper.
Push the door sensing switch upward while pressing
adjacent upper switch stopper of lever stopper and
lower switch stopper down (Figure 1 l-a).
Then remove it by lightly pressing the switch to-
ward you. (Figure 1l-a)
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.
Lower”
Switch
Stopper
Figure Ii-a
Upper
Switch
Stopper
Disconnect all wire leads from primary interlock
and interlock monitor switch.
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.
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
iwll
Interlock
Monitor
%{1
_ Switch
kv !
Primary
Interlock
11 ,\
Switch
Switch stoppers
Figure
Ii-b
~
Interlock Switch Replacement – when rePlacin9
faulty switches be sure switch mounting tabs are 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 12 (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 parm, 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 replacing the magnetron, be sure to
check the microwave energy leakage with a leak-
age detector and confirm the leakage is below
5 mWlcm2.
Duct (msg. exhaust)
\
Blower base
I
stay
Duct (msg. intake)
Figure
12 (Top View)
Screw
~LJ=
v
J
1
::..........
::::;:::
:::::::;
;.:::::::
/’f/
/A
.............::::::-
.::.
;:::.........
...2. .
.::.
.. ::..
: :::::.... +:;..
.: :.;;;
. . . ...2... . . .. ..
.: ::.
,... : .
.::;:”;:::
,: .::..:: .... ...........
... ..::.-.
::..::::.. ... ....
z~j.” :. ::::
//
\
, ~ .,,. @
Ail
Blower Motor
v
Screws
Figure 13
-12–
I
E. REMOVING FUSE
Remove the 8A fuse with a screwdriver.
NOTES
- When replacing the 8A fuse, be sure to use an
exact repair part.
—
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, reDlace 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)
(21
(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.
Control
Figure 14
Control Sheet
, Control Base
Frame
Figure 15
_13–
H. REMOVING DOOR
1.
.-
( 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/
cmz.
DISASSEMBLING DOOR
(Figure 16)
(1)
(2)
(3)
(4)
Insert a thin flat-blade screwdriver between the
choke dielectric and the door mai; frame and lift
up the choke dielectric to release hooks one by
one. (Figure 16)
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
H
c
D
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 wi [h a leakage detector
Microwave energy leakage must be below the limit
of 5 mW/cmz.
J.
REMOVING STIRRER FAN
(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
d~
o
0
/
\
\
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
/
Bottom Plate
\
/
...
...
m
—=
\
L__-))
q’)
b)
Figure 18
-14–
.
I
8. EXPLODED VIEW AND PART LIST
CAVITY PARTS
. . .
ALL sERVICE ON MICROWAVE OVENS SHOULD BE PERFORMED BY A QUA LIFIEO TECHNICAL USING
APPRC)VEO TESTING EQUIPMENT CUSTOMERS SHOULD NOT ATTEMPT TO REPLACE PARTS IDENTIFIED
BY AT RI PLEASTERISK (”””).
2 ~ 411 0825201
3
411 0854102
4
6171305579
5
6171240788
6
6170561600
7
411 011 0802
-L
8
617 1240795
9
411 0892500
10
6171305616
Description
Cabinet (Also order Circuit
Diagram-when replacing Cabinet. )
Screw, Truss
Hd. Tapping,
4x 10mm
Lockwasher, External Tooth,
4mm, U
Oven Cawrv””’
(Not service Part)
Bottom Plate””+
Plastic Foor with Canoe Clip
8oit, Hex. Hd. Machine wtth
Spring Washer & Bolt Washer,
5x14mm, Zl ””*
Htnge Lower” “”
Washer, 5mm, U
Gear Motor
—
Ysy
1
10
2
1
1
4
2
1
1
1
—
—
1
Key
No.
11
12
13
14
15
16
17
18
19
20
21
.
.
Part No.
411 001 4704
6171322095
6171242416
617 1242393
411 0076900
6171241235
6171305609
6171246209
6171208481
6171184679
6171419924
6171385090
Items not illustrated.
15–
+
Turn Table Shaft
Roller
Rotating Tray
Screw, Pan Hal., Tapping,
3 x 6mm, C2-2
Thermostat, Cavity 122 ‘C
Stirrer Cover
Stirrer A’ssy
Insulation Sheet
Insulation Sheat
Name plate
Circuit Diagram
—
I’ty
-’i-
1
1
1
1
1
1
1
1
1
1
1
—
.
i
,
SWITCHES AND MICROWAVE pARTS
,.::
.::..
.:::::.
(
51$1
0 “:: (
;..
(o
//A
>1
~,...
I K-J
10
+ I A’ \%
.-
. ,,.
V? Y--l
The $ign ~ -
The sign ~ -
Notes:
The pzru marked wnh ~ are w
htqh
,oltaga wh,ch ,s exaedd 2SOV.
,,>W ,
r.
The parts marked wsh @) have ;pmaal
12 1
charactenstr$ ,mpwtsnt for
m,c,wave
ieaka~. When rcplaemg●nv of fheseParis
use onlv manufacmrer.sSWcified pare.
. .
. . .
ALL SERVICE UN MICROWAVE OVENS SHOULD BE pERFOR&l E() 8y A oUALi F}Eo TECHNICIAL USING
APPROVED TESTING EQUlpMENT. CUSTOMERS SHOULD NOT ATTEMPT TO REPLACE PARTS IDENTIFIED
BY A7RIPLE AS TERISK (”-”)
Key
No.
Part No.
Description
Q’ty
18
6170751179
Blower Fan
1
19
411 011 5609
Bolt HEX C-SCT 4
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-5220DZ
● ● “
26 6171124583
Micro Switch, Door Sensing
1
V-523 OD-1O3***
27
6171241174
Lever Stopper
● ● ”
1
28
6171241198
Latch Lever””
●
1
29 411 11026O8
Screw, Pan Hd. Tapping + m,
2
4x 12mm, Zl
30
4120182004
Bolt Hex C-SCT 5 x 16
2
31
411 008 1607
Spring Washer 4mm
1
32
411 001 4704
Screw, Pan Hd. Tapping,
1
4 x 10mm, 21
33 4110541903
Nut Hex + FLGWISRT5
2
34 6171325713
Insulation sheet
1
r
Key
No.
Part No.
Description
Q’ty
5
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
411 0825201
6171385113
6171315875
6171257984
617124 ?051
411 0076900
6171241259
415001 9301
1111111111
6171414042
6171170023
6171305708
6171241334
6171306934
6171241082
6171305685
411 0772109
Screw, Truss Hd. Tapping,
4 x 10mm
Poe Supply Cord Complete
High Voltage Transformer,
H5T-71OSAP
Duct. Msg. Inlet
Stay. Cavity & Magnetron
Screw, pan Hd. Tapping,
3 x 6mm C2-2
Thermostat, Magnetron, 135°C
Magnetron, 2M218H(N)**”
Fu9a. 250V 8A
P.CB Complete
Lead Wire Ass’Y with Diode
Lead Wire Ass’Y (Transformer to
~itor)
Ca-itor Band
High Voltage Capacitor including
Resistor, 0.97uf 2.4KV
$p~ Partition (Blower)
Blower Motor
3cresv, Truss Hd. Tapping,
$x20rnm, Z1-1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
2
–lfj–
,. ..
,
‘
DOOR PARTS
\9
. . .
ALL SERVICE ON MICROWAVE OVENS SHOULD BE PERFORMED BY A QUALIFIED TECHNICAL USING
APPROVED TESTING EQUIPMENT. CUSTOMERS SHOULD NCIT ATTEMPT TO REPLACE PARTS IDENTIFIED
BY A TRIPLE ASTERISK (“””).
Key
Part No.
Description
No.
Q’ty
1
6171240917 Door Cover”
● ●
1
2 6171240924
Ooor Panel”
● ●
1
3
6171240818
Door Main Frame””” (Also order
1
Door Sheet when replacing Door
Main Frame)
4 6171240948
Choke Dielectric*””
1
5
6171240931
Door Sheet”*”
1
6
411 0541903
Nut, Hex. Hd. with Washer. 5mm
2
~ ~ PartNo. ]
Description
a’ty
7
, 617 1240955 ] Hinge, Upper”””
1
8
411 011 0802 I Bolt, Hex. Hd. Machine with
2
~ Spring Washer and Bolt Washer,
5x 14mm, Zl ”””
9
6170806503
Rivet*””
2
10
617101 1494
Spring*””
1
11 617101 1487
Door Latch””
●
1
—
17–
i
CONTROL PANEL PARTS
68
5t\
7***\ i \
3
● .*
1***
I
\
11 4**
.
0“0 ALL SERVICE
ON MICROWAVE OVENS SHOULD BE PERFORMED BY A QUA LIFIEO TECHNICAL USING
APPROVED TESTING EQUIPMENT. CUSTOMERS SHOIJLD NOT ATTEMPT TO REPLACE PARTS IDENTIFIED
BYA TRIPLE ASTERISK (“-, )
Key
Part No.
No.
Description
Q’ty
1
6171305630 Consrol Sheet
(Also order Touch
Key Board when replacing
11
Control Sheet) 1
2 6171305647 Touch Key Board”
● ” (Also order
1
ContFol Sheet when replacing
Touch Key Board)
3 6171241341
Comrol Plate”””
1
4
6171241150 Control Frame”
● ”
1
5
411 04354102 Lockwasher, External Tooth, 4mm
1
PRINTED MATTER (Item Not Illustrated)
Key
Part No.
No.
Description
cl’ty
6171305753 Opaating Instructions
1
6171419955
Carton Box
1
Key
Part No.
NO.
Description
Q’ty
6 411 0825201
Screw, Truss Hd. Tapping,
1
4x 10mm, U1.1
7 6171241129 ,
Conrrol Base”oo
1
8, 617 1289428 ~ Control Circuit Board Complete
1
9 411 1295805
Screw, Bind Hd. Tapping,
2
3 x 10mm, ZK-1
10
6170809559
Spring, Door Release Lever ““
2
11
6171241143
Ooor Release Lever-””
1
I
1
1
I
I
–18–
CONTROL CIRCUIT BOARD
(PIN 617128 8428)
TP-4
TP-5
77
2
TP-2 -
J-1
Cn
Ill
MI
G
J1
N ~ g g--!-
-..
00
0
J(-+Ac’2
o
- TP-3
- TP-1
—1
~ Ground
–19–
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