Toshiba ER-1010ETE User manual

SERVICE DATA
FILE NO.330-239
MICROWAVE OVEN
ER-1010ET
SPECIFICATIONS
Power
Source
Voltage
220
Volts
Single
Phase
Usable Volume 28 2
15 minutes
Safety Interlock
Net Weight (with Tray}
Two switches operated by door handle
29 kg
Frequency 50 Hz
Power Consumption 1.9 kW (Approx.)
Output 1000W/200W (DEFROST)
Microwave Frequency | 2,450 MHz
Magnetron Type 2M137
| Height. 370 mm
Outer Width 570 mm
| | | i Depth 420 mm |
Dimension Height 224 mm
Inner Width — 350 mm
(Cavity) Depth 360 mm
|
|
Specifications are subject to change without notice
Sep. 1984 Printed in Japan GO

ER-1010ETE |
CAUTION
This
device
is
to
be
serviced
only
by
properly
qualified
service
personnel.
Consult
the
service
data
for
proper
service
procedures
to
assure
continued
safety
operation
and
for
precautions
to
be
taken
to
avoid
possible
exposure
to
excessive
microwave
energy.
CAUTION
MICROWAVE RADIATION
PERSONNEL
SHOULD
NOT
BE
EXPOSED
TO
THE
MICROWAVE
ENERGY
WHICH
MAY
RADI-
ATE
FROM
THE
MAGNETRON
OR
OTHER
MICROWAVE
GENERATING
DEVICE
IF
IT
IS
IMPROPERLY
USED
OR
CONNECTED.
ALL
INPUT
AND
OUTPUT
MICROWAVE
CONNEC-
TIONS,
WAVEGUIDES,
FLANGES,
AND
GASKETS
MUST
BE
SECURE.
NEVER
OPERATE
THE
DEVICE
WITHOUT
A
MICROWAVE:
ENERGY
ABSORBING
LOAD
ATTACHED.
NEVER
LOCK
INTO
AN
OPEN
WAVEGUIDE
OR
ANTENNA
WHILE
THE
DEVICE
IS
ENERGIZED.
PRECAUTIONS
TO
BE
OBSERVED
BEFORE
AND
DURING
SERVICING
TO
AVOID
POSSIBLE
EXPOSURE
TO
EXCESSIVE
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
serviced
before
activiating
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,
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
genera-
tion
and
transmission
systems
shall
be
repaired,
replaced,
or
adjusted
by
procedures
described
in
this
service
data
before
the
oven
is
released
to
the
owner.
(e)
A
microwave
leakage
check
to
verify
compliance
with
the
performance
standard
should
be
performed
on
each
oven
prior
to
release
to
the
owner.
CONTENTS
PROPER
USE
AND
PRECAUTIONS
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| ER-1010ETE
PROPER USE AND PRECAUTIONS
1. For Safe Operation
Damage that allows the microwave energy (that cooks or
heats the food) to escape will result in poor cooking and
may Cause serious bodily injury to the operator.
IF ANY OF THE FOLLOWING CONDITONS EXIST,
OPERATOR MUST NOT USE THIS APPLIANCE.
(Only a trained serviceman should make repairs.)
(1) A broken door hinge.
(2) A broken door mesh plate.
(3) A broken front panel, oven cavity.
(4) A loosened door lock.
(5) A broken door lock.
The door gasket plate and, oven cavity surface should be
kept clean.
No grease, soil or spatter should be allowed to build up on
these surfaces or inside the oven.
DO NO ATTEMPT TO OPERATE THIS APPLIANCE
WITH THE DOOR OPEN. The microwave oven has con-
cealed switches to make sure the power is turned off when
the door is opened. Do not attempt to defeat them.
DO NOT ATTEMPT TO SERVICE THIS APPLIANCE
UNTIL YOU HAVE READ THIS SERVICE MANUAL.
2. Correct Installation
(1) This microwave Oven weights 29 kg and must be
placed on a horizontal base strong enough to support
this weight.
(2) The Oven should be placed as far from high tempera-
ture heat source and vapour as possible.
(3) The power supply cord is 1.8 m_ long.
Grounding is required when connecting the power
source.
(4) Power consumption of this oven is approximately
2.0 kW. It is suggested that the unit is operated on
such power line that can provide more power than this
rating.
Objects must not be placed on the top enclosure so as
not to obstruct air flow for ventilation.
~_
(o3)
~~
EXTERNAL VIEWS
370 mm
: t— 26 mm
227 mm
420 mm
oe 570 mm
Fig. 1 Front View
37 mm
Fig. 2 Right Side View
|
2

ER-1010ETE |
w
=>Seenous
= =
- DOOR HANDLE
Employs Automatic Door Latch Mechanism.
OVEN WINDOW
STIRRER FAN
Operates whenever the oven is in use, and gives even dis-
tribution of Microwaves throughout the cooking cavity.
. COOKING TRAY
DISPLAY WINDOW
POWER LEVEL PAD
TIMER KNOB
NUMBER PAD
START PAD
CLEAR PAD
MEMORY PAD
ZA
©
AN
jo |
=a © o,
& ®
*
ee
HUG
a 2, |
=
S
a)
Fig. 3
OPERATION
. Open the door by pulling out on handle, the oven
light will turn on. Place the food on the cooking tray.
. Close the door, the oven light will turn off, and the
latch will snap shut automatically locking the door.
If the door is not closed properly, the oven will not
start.
. Set the power level simply by touching the FULL
pad or the DEFROST pad . Either
of dots, below the mark tS (FULL) or above the
mark % (DEFROST), will light up.
. Set the timer, simply by turning the timer knob, to
the desired cooking time; up to 15 min. when FULL
setting, or up to 30 min. when DEFROST setting.
The setting time will appear in the display window.
NOTE: It can be set the cooking time with the in-
crement as shown in the next table.
. Touch the START pad [@] , to start the cooking
process. The dot above .the mark << (COOK)
will light up and the oven light and fan will turn on.
They operate during cooking.
6. The cooling will be continued until;
the timer returns to ‘0’. The oven will automati-
cally shut off and notice it by three beeps. The
oven light, fan and all indication in the display
window will turn off.
the CLEAR pad is touched. The oven will
automatically shut off, and the oven light, fan and
all indication in the display window will turn off.
the door is opened during cooking. The oven will
automatically shut off, and the fan will turn off.
In the display window,the COOK dot will! turn
off and the FULL or DEFROST dot and the time
will remain. To disappear them, touch the CLEAR
pad
The oven will not restart until the door is closed
and the START pad is touched again.

FULL POWER SETTING
fiete 2min |
over 2min.
upto 5min. 30 sec.
over 5 min. 30 sec. 30 sec.
up to 10 min.
over 10 min. 1 mi
up to 15 min. mu:
DEFROST POWER SETTING
over 2 min.
upto 5 min.
over 5 min.
up to 10 min.
over 10min.
up to 16 min.
Example of Setting
WMS
La)
Touch
pad. i, ®D ,
Ssh
Ww
Set Timer to sg
4 min. 30 sec. Lt: 0
vi, D
Touch ‘HM
pad. =
tte
Ws fn
i, 7)
Open the door
during cooking. a
eM
9 felsuy
ey ’
ER-1010ETE
| ensovere |
4
j
MEMORY
This oven employs the memory function which is available
to enter 7 kinds of the cooking processes, using with the
MEMORY pad and one of the NUMBER pads
<—
This is convenient tor the repeatable cooking.
TO SET MEMORY with an example;
1. Touch FULL pad
2. Set the timer to 1 min. 30 sec.
3. Touch the NUMBER pad [_1 |
A dot on the corner in the number pad will light up.
4. Touch MEMORY pad
The cooking process with FULL power for 1 min. 30 sec.
was entered into the NUMBER pad [ 1] . The other
cooking processes can be memorized into the each NUM-
BER pad with the same steps.
TO USE MEMORY
1. Touch the NUMBER pad [1 |
A dot in the number pad ["1] will light up and the
memorized cooking process, the power level and the
cooking time, will appear in the display window.
2. Touch the START pad
The oven will start the cooking process which is mem-
orized.
TO CHANGE MEMORY
The memory cannot be cleared or changed even by touch-
ing the CLEAR pad [0] , except when the new cooking
process with the same steps in ‘TO SET MEMORY’ is
entered,
1. Set the power level.
2. Set the cooking time.
3. Touch the NUMBER pad in which the memory is to
be changed.
4. Touch MEMORY pad.
NOTE: The area beside each NUMBER pad may be served
to put on the paper for your quick reference of the mem-
ory.

ER-1010ETE |
INTERLOCK MECHANISM FUNCTIONS AND ADJUSTMENTS
The door lock mechanism is a device which has been
specially designed to completely eliminate microwave radia-
tion when the door is opened during cooking, and thus to
perfectly prevent the danger resulting from the leakege of
microwave.
Whenever the door lock mechanism is repaired, check
microwave leakage according to the procedure specified
in page 19.
1. Mechanical Function
When the door is closed, the catch under the door handle
snaps on the latch on the oven, locking the oven door. If
the door is not closed properly, the oven will not operate.
Fig. 4 shows the closed door condition.
When the door is closed, the lower catch pushed the slider
of the interlock monitor switch to bring it “OFF” condi-
tion, then the catches, upper and lower, individually
engage with the latch and the tip of the catches pushes the
lever which presses the button of the primary/secondary
interlock switch to bring them under “ON” condition.
Latch Primary
Interlock
Switch
Catch
Interlock
Monitor
Switch
Latch
Spring
Slider
Hook
Spring
Secondary
Lever Interlock
Switch
Fig. 4
When the handle is pulled to open the door, as illustrated
in Fig. 5, the catches disengage from the latch, leaving the
lever in a free state, thus the lever is pushed by the switch
button to turn off the switch and open the circuit. Then
the lower catch releases the slider to bring the interlock
Monitor switch under “ON” condition.
Primary
Latch Interlock
\ Switch
Interlock
Monitor
Switch
Latch
Spring
Slider
Hook
op ung Secondary
Lever Interlock
Switch
Fig. 5
2. Adjustment Procedure
(1) Preliminaries:
The primary and secondary interlock switch position
should be adjusted such that the switches become
“ON” condition where the lever is lowered by 4mm
measured at the tip of the lever. (Refer to Fig. 6)
ON
4mm
Fig. 6
(2) Adjustment steps:
a} Loosen two mounting screws.
b) Adjust the primary/secondary interlock switch
assembly position.
c) Confirm the movement described in (1).
d) Tighten the two mounting screws.

| ER-1010ETE
DISASSEMBLY INSTRUCTIONS
1. Cabinet and Back Cover Removal (Refer to Fig. 7):
(1) Remove nine screws ‘1’ to ‘7’ on the back and ‘8’ to
‘9’ on the side of the cabinet.
(2) (The screws with washer are located ‘2’ to ‘6’.)
(3) Remove the cabinet.
(4) Remove four screws ‘10’ to ‘13’.
(5) Remove the back cover.
13
Fig. 7
2. Oven Assembly Removal (Refer to Fig. 8)
Fig. 8
(1) Remove the cabinet parts.
(2) Remove three screws ‘1’ at bottom of the oven front,
anda screw ‘2’ on the back of oven.
(3) Disconnect the connector ‘B’ and two leads of HV
transformer ‘3’ from the magnetron ‘4’,
(4) Remove the oven assembly.
3. Magnetron Removal (Refer to Fig. 8)
(1) Remove the oven assembly.
(2) Remove a screw ‘5’ which secure the duct ‘6’, and
remove it.
(3) Remove three screws ‘7’ which secure the blower ‘8’,
and remove it.
(4) Remove four nuts ‘9’.
(5) Remove the magnetron ‘4’.

:=R-1010ETE |
CAUTION-MICROWAVE LEAKAGE
Never install the magnetron without the metallic gasket
plate which is packed with each magnetron to prevent
microwave leakage.
(Refer to Fig. 9 and 10)
Whenever repair work is carried out on magnetron, check
the microwave leakage according to the procedure specified
in the “Microwave Leakage Test’’ on page 20.
** * * DO NOT OPERATE WITHOUT * * * *
CABINET
v Metallic Gasket Plate
Magnetron Antenna
CAUTION:
The connection of HV Leads of the capacitor must be as
Fig. 9 shown in Fig, 12.
Magnetron Antenna
Wave Guide (ACO
Metallic Gasket Plate
Fig. 10
. To
HV Relay ~
4. HV Transformer Removal (Refer to Fig. 11) To
(1) Remove the cabinet parts and the oven assembly. Be elsy
a“
*
(2) Remove four screws ‘1’ which secure the plate ‘2’. .
(3) Remove the plate ‘2’. oe
Magnetron
(4) Remove four screws ‘3’.
(5) Remove the HV transformer ‘4’. To
HV Transformer
Fig. 12

(1)
(2)
(3)
(4)
(1)
(2)
{3)
(4)
Control Panel Assembly Removal (Refer to Fig. 13)
Remove the cabinet parts.
Disconnect the Connector ‘A’.
Remove two screws ‘1’.
Remove the contro! panel assembly.
Fig. 13
Door Assembly Removal (Refer to Fig. 14)
Remove the cabinet parts.
Remove two screws ‘1’ at top door hinge.
Remove two screws ‘2’ at bottom door hinge.
Remove the door assembly.
-.— 1
aa a.
Fig. 14
7. Outer Screen Barrier Removal (Refer to Fig. 15)
(1) Remove the cabinet parts and the door assembly.
| ER-1010ETE
(2) Remove ten screws ‘1’ which secure the door choke
plate ‘2’.
(3) Remove the door choke plate ‘2’, the inner screen
barrier ‘3’ and the screen ‘4’.
(4) Remove the door cover ‘5’.
(5) Remove six screws ‘6’ which secure the door sash
‘T’.
(6) Remove the door sash ‘7’.
(7) Remove three screws ‘8’ which secure the mount
plate ‘9’, and remove it.
(8) Remove four screws ‘10’ which secure the upper
hinge unit ‘11’ and lower hinge unit ‘12’, and remove
them.
(9) Remove the door handle ‘13’.
(10) Remove the outer screen barrier ‘14’.

8.
Caution
WHENEVER ANY OVEN DOOR PARTS ARE REPAIRED
OR REPLACED/CHECK MICROWAVE LEAKAGE.
(Refer to Fig. 16)
(1)
(2)
(3)
(4)
(5)
Prepare a piece of paper and cut it approx. 25mm (1”)
wide by 100mm (4") long.
Open the door and put it on the oven front plate.
Close the door to hold it between the door gasket
plate and the oven front.
Draw out the paper. If it is not drawn smoothly, the
door gasket plate is working properly.
Repeat above procedure at other several position to
check for possible gap around the door. But if any
gap are found, adjust the position of the hinge or the
latch position of secondary interlock according to the
steps described on item 9, “Hinge and Latch Position
Adjustment”’.
NOTE:
Smal! gap may be acceptable if the microwave leakage does
not exceed 1 mw/cm?.
Fig. 16
Hinge and Latch Position Adjustment
(Method to reduce the gap between the gasket plate
and the oven front)
(1) To reduce the gap located on part “A’’. (See Fig. 17)
a) Loosen two screws on bottom hinge, then push
the door to contact the gasket plate to oven front.
b) Tighten two screws.
c) Check the gap
(2) To reduce the gap located on part ‘‘B’’. (See Fig. 17)
a) Loosen two screws on top hinge, then push the
door to contact the gasket plate to oven front.
b) Tighten two screws.
c) Check the gap
| ER-1010ETE
Fig. 17
(3) To reduce the gap located on part ‘’C’’ and “D’’. (See
a bs aes
Fig. 17)
a) Loosen three screws on tatch located right of oven
body. (Fig. 18)
b) Draw the latch inward slightly.
c) Tighten two screws.
d) Check the gap
Catch
Fig. 18

=R-1010ETE |
10. Control Panel Parts Removal
10.1 Control Panel Assembly Removal
(Refer to Fig. 20)
1) Remove the cabinet parts.
2) Disonnect three connectors, T1, T2; and T3. (Refer
to Fig. 20)
3) Remove two screws ‘1’ holding the panel assembly
to the oven front.
4) Pull out the panel assembly from the oven front.
10.2 Key Board Assembly Removal
(Refer to Fig. 20)
1) Remove the pane! assembly.
2) Remove four screws ‘2’ holding the Key Board As-
sembly ‘5’ to the panel sash ‘4’,
3) Pull Key Board Assembly ‘5’.
10.3 EDT-1010 Board Assembly Removal
1) Remove the panel assembly.
2) Remove two screws ‘3’ holding the LED ‘7’ to the Fig. 20
Key Board Assembly ’5’.
3) Disconnect the connector, T4, T5 and T6, from
EDT-1010 Board Assembly.
4) Remove EDT-1010 Board Assembly ‘6’ by pushing
the latch of supports.
LED
EDT-1010
Board
Assembly
waePush
Support~~—
Panel Chassis
Fig. 21
Low Voltage DC Relay DC Relay
Transformer (2) (1)
Fig. 19
—12—

| ER-1010ETE
TROUBLESHOOTING CHART
DANGER OF HIGH VOLTAGE
4000 volts exist at the high voltage area.
Do not operate the oven with the cabinet parts
removed. Do not remove the cabinet parts unless
the power cord is unplugged from wall outlet.
Determine whether or not a defect is in the control panel
block or others first.
The control panel assembly is divided into five units, key
board assembly, timer, two of LED board assemblies and
EDT-1010 board assembly.
When they are judged to be defect according to following
troubleshooting charts, they should be replaced by unit.
Do not check, repair, or adjust the control panel block
unless the power cord is unplugged from wall outlet.
’
1. Troubleshooting by unit replacement according to
the symptoms indicated
1.1 Key Board Assembly
The following symptoms indicate a defective key board
assembly. Replace the key board assembly.
1) When touching the pads, a certain pad produces
no signal at all.
2) When touching a pad, two figures or more are dis-
played.
3) When touching the pads, sometimes a pad produces
no signal.
4) Only one indicator does not light up. (In connection
with EDT-1010 board assembly).
1.2 LED Indicator Board Assemblies
The following symptoms indicate a defective LED indicator
board assembly. Replace the LED indicator board as-
sembly.
1) A certain digit, and/or some segments do not light
up.
2) At a certain digit, brightness is low when it lights up.
(In connection with EDT-1010 board assembly and
timer)
1.3. EDT-1010 Board Assembly
The following symptoms indicate a defective EDT-1010
board assembly. Replace the EDT-1010 board assembly.
1) In connection with key board assembly.
a) When touching the pads, a certain group of pads
do not produce the signal.
b) When touching the pads, no pads produce the signal.
2) in connection with LED indicator board assembly.
a) The corresponding segments of all digits do not
light up, or they continue to light up.
b) Wrong figure appears.
c) The figures of all digits flicker.
3) Other possible troubles.
a) Buzzer does not sound or sounds continuously.
(Note: During pushgin CLEAR pad [© ] , buz-
zer will sound continuously.)
1.4 Timer
The following symptoms indicate a defective timer. Replace
the timer.
1) In connection with LED indicator assemblies.
a) When turning the timer knob, only a certine time
is indicated.
b) When setting the timer knob to the maximum set-
ting, any indication other than the following is
displayed;
at FULL power setting : 15 : 00
at DEFROST power setting : 30 : 00
ag3—

-R-1010ETE
2. Main Fuse is blown out
Plug the power cord into
wali outlet.
No
Open the door.
No Is fuse blown Yes
out?
Set the cooking time.
Close the door and push
the START pad
&
Replace EDT-1010
board assembly.
1) Layer short on
the secondary
winding.
HV
Transformer
2) Poor insulation
between capaci-
tor terminals.
HV
Capacitor
Door : Close
Is fuse blown Yes
out?
No Is interlock monitor
switch closed?
Yes
Open the door.
Replace interlock
monitor switch.
No
Is secondary interlock
switch closed?
Replace secondary interlock
switch and interlock monitor
switch.
Replace secondary interlock
switch and interiock monitor
switch.
Replace interlock
monitor switch.
No
\s fuse blown Yes
out?
Check the parts listed in
Table 1.
Check for continuity
between these portions.
yi
High Voltage Capacitor.
Fig. 22
Table 1
Diagnosis
The fuse does not blow right away, but it blows in a few| Replace HV trans-
seconds, then there is a layer short. former
Check for the continuity between capacitor terminals.
there is continuity, capacitor is defective. (See Fig. 22)
{f| Replace HV capaci-
ee fe

3.
Magnetron
does
not
operate
(Food
will
not
become
hot)
Plug the power cord into
wail outlet.
Set the
power level
IsFULLCS or
DEFROST ,%, light on?
Set the cooking time.
Close the door and push
the START pad &
ts fuse (0.2A)
blown out?
Normal
Check
power
transformer.
Defective
Replace
EDT-1010
board
assembly.
Yes
id soor opening
monitor switch
is opened?
fillustrated in Fig. 23,
Check /replace
door opening
monitor switch.
Close the door and push
the START pad <>.
Note:
Check
wire
harness
and
wiring
Check
the
voltage
betwee
i
I
I
|
|
|
|
|
|
|
| before replacing the switch
|
|
|
|
|
|
|
L
in Fig. 23.
{ AC220V
| !
| I
——»| ° I
| I Check the parts listed
! | in Table 3
! !
|
AC AC AC
|_7v 7V_32v | Normal
Power Transformer
im = AC220V
el see ame
lA
Disconnect these
quick connectors.
H.V. Transformer
Disconnect quick connectors
quick connectors as illustrated
Check the parts listed
Replace
EDT-1010
board
assembly
'ER-1010ETE
Note: Check by sound of
blower motor.

R-1010ETE |
Cause
Table 2
Diagnosis
Remedy
Parts
Magnetron
1) Open magnetron
heater.
Check continuity of magnetron heater with wires removed
using multimeter. !f there is no continuity, magnetron
heater is open.
Replace magnetron.
2) Shorted
magnetron
Connect megger leads to magnetron terminals and magnetron
body. If there is contiuity, magnetron is defective. (In this
event. main fuse will be blown.)
Replace magnetron.
Rectifier
Defective rectifier
Check continuity of recrifier in forward and backward di-
rection with DC megger. If there is continuity in backward
direction, rectifier is defective.
(In this event, high-voltage capacitor will be come hot.)
Replace rectifier.
H.V
transformer
Open coil of
H.V. transformer
Check primary coil and secondary coil for continuity. If
there is no continuity, transformer is defective.
Replace H.V.
transformer.
H.V.
capacitor
Secondary
interlock
switch
Primary
interlock
switch
|
Shorted H.V.
capacitor
Poor contact of
secondary interlock
switch
Poor contact of
primary interlock
switch
DC
relay
(2)
|Defective
DC
relay
(2
Relay (3)
Magnetron
thermostat
or oven
thermostat
Defective relay (3)
1) Magnetron
thermostat open.
2) Oven thermostat
open.
Check continuity of capacitor terminals with wires removed.
lf there is continuity, capacitor is defective. If capacitor
shorts, fuse is blown out.
Table 3
Diagnosis
Check the terminals for continuity with wires removed using
multimeter, pressing switch ON and OFF repeatedly.
Check
relay
terminals
for
continuity
with
wires
removed
and
energizing
DC
relay
coil.
If
there
is
no
continuity
between
terminals,
DC
relay
is
defective.
Check realy terminals for continuity with wires removed
and energizing relay coil. Sf there is no continuity between
terminals, relay is defective.
Check thermostat terminals for continuity with wires re-
moved using multimeter. If there is no continuity between
terminals, thermostat is defective.
—~16—
Replace H.V.
capacitor.
Replace
or adjust.
Replace DC relay (?).
Replace relay (3).
Replace thermostat.

4. Others
Trouble
Cause
Table 4
Diagnosis
| ER-1010ETE
Oven lamp
does not
illuminate,
when door
is open.
ee
1) Fuse blown out.
Check fuse in fuse holder.
Replace fuse.
—
2) Poor contact of
power cord.
Check power cord for continuity. Also check to see if
power leads are securely wired.
Adjust or replace
3) Lamp blown out.
Check famp.
Replace lamp.
4) Magnetron
thermostat open.
b
5) Oven thermostat
open.
Lamp does not illuminate, even after lamp is replaced
when door is open.
Check thermostat terminals for continuity with wires
removed using multimeter. If there is no continuity
between terminals, thermostat is defective.
Replace thermostat.
6) Defective lamp
contro! switch
Check wiring on each terminal, NO, NC and COM.
\f it is correct, check terminals for continuity with
wire removed using multimeter, pressing switch ON
and OFF repeatedly.
Replace lamp
control switch
Stirrer fan
does not
rotate,
Sparking
(or arcing in
cavity).
t
L
1) Defective stirrer
Motor
if motor does not operate with 240V applied to motor
terminals, motor may be faulty.
Replace stirrer
2) Stirrer fan
caught by cavity
or spatter shield
1) Carbonized
dust in oven.
2) Stirrer fan
touches cavity
Check
fan
movement.
Check whether dust accumulates on spatter shield or its
support.
Check fan movement.
Clean oven cavity.
Microwave
turns off
during cook-
ing cycle.
Only regular
output.
1) Too smal! load of
food.
If small amount of food is heated for a long time, micro-
wave is turned off during operation.
To increase load,
place a cup of water
into oven cavity in
addition to food to
2) Defective
magnetron
thermostat
1) Defective
DC relay (1)
2) Defective
HV relay.
Check relay terminals for continuity with wires removed
and energizing DC relay coil. If there is no continuity
between terminats, DC relay is defective.
Check relay terminals for continuity with wires removed
and energizing HV relay coil. if there is no continuity
between terminals, HV reiay is defective.
CAUTION: HV wire must be removed before check.
In this case, oven lamp does not illuminate but blower
operates normally.
SATS
Replace thermostat.
Replace DC relay (1).
Replace HV relay.

R-1010ETE |
MEASUREMENT
1. Microwave Output Power
1.1. standard Method
Microwave
output
power
can
be
checked
by
indirectly
Measuring
the
temperature
rise
of
a
certain
amount
of
water
exposed
to
the
microwave
as
directed
below.
Oven
should
be
run
for
pre-heating
about
30
minutes
be-
fore
measurement.
:
(1)
Prepare
2
glasses
or
plastic
breakers
or
similar
cups.
(2)
Pour
1
liter
of
cold
tap
water
(it’s
temperature
should
be
10
+ 1°)
into
each
beaker.
(3)
Stir
the
water
with
a
thermometer
and
note
water
tem-
peratures,
T;
and
T,,
in
°C.
(4)
Put
both
beakers
in
place
on
the
tray
(it's
temperature
should
be
the
same
as
ambient).
(Fig.
24)
{5)
Heat
the
water
for
a
period
of
exactly
1
minute
30
seconds.
(6) Take both beakers out of the oven, stir the water with
the thermometer, and note the temperatures, T,’ and
T2',in °C.
(7) Calculate the temperature rise of the water in each
beaker by:
AT, =T1'-T (°C)
AT, =T2'-T (°C)
(8) Obtain the microwave output power by the following
formula or by using the monograph in Fig. 20.
+
Power =100x Bi Sle
5 (watts)
The power measured should be 1O000W + 12.5%
CAUTION:
1. Heating time should be exactly 1
seconds.
2. Water load should be measured exatctly to 2 liters.
3.
Input
power
voltage
should
be
exactly
220
V
as
speci-
fied.
4. Ambient temperature should be 20 + 1°C.
Two 1,000 cc Beakers
*
minute and 30
Water Load
Tray
Fig. 24
1.2 Alternative Simplified Method
1)
2)
3)
4)
— 18 —
Fill
a
glass
cup
with
200
milliliters
cold
tap
water.
Put the cup into the oven.
Heat for about 3 minutes.
It
can
be
easily
confirmed
that
the
power
output
is
in
the
normal
level
if
the
water
in
the
cup
is
boiling.
1100
£ 1000
oO
s
5
2
fo}
= 900
a
a
re)
ao
8 800
$
oO
3
s
700
7 8 9 10 11
2
Temperature Rise (°C)
Fig. 25 Monograph of Microwave Output Power
for Water Temperature Rise in the Oven

2. Microwave Heat Distribution-Heat Evenness.
The microwave heat distribution can be checked by indir-
ectly measuring the water temperature rises at certain po-
sition in the oven as directed below.
(1) Prepare five beakers made of ‘Pyres’ and having 100 cc
Capacity each.
(2) Measure exactly 100cc of water load with use of a
measuring cylinder and pour it into each beaker.
(3) Measure the temperature of each water load. (The
readings shall be taken to one place of decimals.)
(4) Put each beaker in place on the cooking tray as illus-
trated in Fig. 26 and start heating.
(5) After heating 2 minutes, measure the temperatures of
water in each beaker.
(6) Calculate the temperature difference for each water
load to get the heat distrubution rate by the following
formula.
Minimum
temperature rise
Maximum
temperature rise
Heat distribution rate = x 100%
The result should exceed 65 %.
Five 100 cc Beakers
Front End
Fig. 26
| ER-1010ETE |
3. Electrical Continuity Check of Interlock Switches
3.1 Procedure
NOTE:
Remove the power plug from the wall receptacle before
testing.
1. Primary Interlock Switch
1) Disconnect two connectors from primary interlock
switch.
2) Connect the ohmeter leads between the terminals
of the primary interlock switch.
3) Read the value of resistance between the termjnals
of the switch, when the door is opened, and when
the door, is closed.
2. Secondary Interlock Switch
1) Disconnect two connectors from secondary inter-
lock switch.
2) Connect the ohmeter leads between the terminals
of the secondary interlock switch.
3) Read the value of resistance between the terminals
of the switch, when the oven door is opened, and
when the oven door is closed.
3.2 Judgement
The value of resistance should be applied to the value speci-
fied below.
Push Cook
Button
Primary Interlock
Switch
Secondary Interlock
Switch
Interlock Monitor
Circuit
When value obtained is not acceptable, the switches should
be replaced or adjusted again.
—19—

3-1010ETE |
4. Microwave Leakage Test
4.1 Warning
(1) DO NOT place your hands into any suspected micro-
wave radiation field unless the safe density level is
known.
(2) Always start measuring of an unknown fieid to assure
safety for operating personel from radiation.
(3) Slowly approach the unit under test until the radio-
meter reads an appreciable radiation leakage from the
unit under test.
(4) Caré should be taken not to place the eyes in direct
line with the source of microwave energy.
4.2 Method
The power density of the microwave radiation emitted by
the microwave oven should not exceed 1mW/cm? at any
point 50 mm or more away from the external surface of
the oven as measured prior to acquisition by a purchaser
and thereafter once the oven is in use, 5mW/cm? at any
point 50 mm or more away from the external surface of the
oven.
Measurements should be made with the oven operating at
its maximum output and containing a load of 275 + 15
mililiters of tap water initially at 20 + 5°C placed within
the cavity at the center of the load-carrying surface pro-
vided by the manufacturer. The water container should be
a low from 600 mililiters beaker having an inside diameter
of approximately 85mm and made of an electrically non-
conductive material such as glass or plastic.
4.3 Procedures
(1) Prepare 600 cc glass or plastic container.
(2) Pour 275+ 15 mililiters of tap water initially at
20 + 5°C in the container.
(3) Place it at the center of the tray and set it in a cavity.
(4) Operate the oven.
(5) Measure the microwave feakage using a Narda 8100
or similarly approved microwave leakage meter after
a few minutes operation.
—20—