Panasonic NE-7920 User manual

ORDER NBR. MOD-7804-003
Service
Manual
Microwave Oven
NE-7920, NE-7920C
NE-8020
NE-7920, NE-7920C NE-8020
NE-7920, NE-8020 for U.S.A.
NE-7920C for Canada
SPECIFICATIONS
Power Source: 115V AC Single Phase:60 Hz
Power Requirement: 1.42 KW (13.0 A)
High Frequency Output: 700 W : full power
Oscillation Frequency: 2450 MHz
Magnetron: 2M157-M2
Timer: 99 minutes 99 seconds
9 hours 99 minutes for Low power
Cooling Method: Air Cooling
Approximate Outside Dimensions: 24-3/4"" (W) x 18-1/2” (D) x 14-3/4” (H)
63.0 cm (W) x 47.0 cm (D) x 37.5 cm (H)
Approximate Oven Cavity 15-1/2" (W) x 15-1/2” (D) x 9-1/2” (H)
Dimensions: 39.5 cm (W) x 39.5 cm (D) x 24.0 cm (H) ,
Approximate Weight: 71 Ibs ,
32 Kg |
Specifications subject to change without notice.
Panasonic Company
a Division of Matsushita Electric Corporation of America Panasonic Hawaii, Inc. Matsushita Electric of Carmeds L
ig One Panasonic Way, Secaucus, N.J.07094(201)348-7000 320 Waiakamilo Road, Honolulu, Hawaii 96817 5770 Ambler Drive, Missis**4U98, Ont. Law 273
Copyright © 1979 by Matsushita Electric Corporation of America, All rights reserved.
A1

.
This
product
should
be
serviced
only
by
trained
qualified
personnel.
.
Though
this
product
has
been
manufactured
in
compliance
with:
“Federal
Performance
Standard
21
CFR
Subchapter
J”
(HEW):
NE-7920,
NE-8020
or
“Radiation
Emitting
Devices
Act”
(NHW):
NE-7920
it
is
very
important
when
servicing
to
avoid
being
exposed
to
excessive
microwave
radiation.
This
may
be
hazard-
ous.
All
repairs
shoud
be
made
in
accordance
with
procedures
described
in
this
manual.
_
Check
for
radiation
leakage
after
every
servicing
according
to
the
“procedure
for
measuring
radiation
leakage”
on
pages
21
&
22.
.
Any
serviceman
who
learns
of
any
accident
pertaining
to
microwave
radiation
leakage
should
immediately
notify
the
appropriate
address
listed
below.
IN
U.S.A.
PANASONIC
COMPANY
Division
of
Matsushita
*
(MECA)
Electric
Corporation
of
America
One
Panasonic
Way,Secaucus,New
Jersey
07094
Attention:Quality
Assurance
Dept.
(201)
348-7000
IN
HAWAII
PANASONIC
HAWAII,
INC.
(PHI)
320
Waiakamilo
Road,
Honolulu,
96817
(808)
847-5361
IN
CANADA
MATSUSHITA
ELECTRIC
OF
CANADA
LIMITED
(MELCA)
5770
Ambler
Drive,
Mississauga,
Ontario,
L€W
2T3
(416)
624-5010
5.
There
are
special
components
used
in
the
microwave
oven
which
are
important
for
safety.
These
parts
are
shaded
on
the
schematic
diagram
and
on
the
replacement
parts
list.
It
is
essential
that
these
critical
parts
should
be
re-
placed
with
manufacturer’s
specified
parts
to
prevent
microwave
leakage,
shock,
fire,
or
other
hazards.
Do
not
modify
the
original
design.
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Installation...
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Precautions
to
be
observed
before,
and
during
servicing
to
avoid
possible
exposure
to
excessive
Microwave
CNELGY
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Cautions
to
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when
troubleshooting.
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Disassembly
and
parts
replacement
procedure.
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Measurements
and
adjustments
(Including
the
Safety
Interlock
Switch
Circuit)............
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Procedure
for
measuring
radiation
leakage
.....
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Customer
complaints
not
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to
oven
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Troubleshooting
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Component
test
procedure
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Digital
programmer
circuit
test
procedure.
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Necessary
tools
and
measuring
instruments.
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and
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;

INSTALLATION
1, Check the grounding. 5. Position the microwave oven away from radios,TV’S,
2. Confirm the power source capacity. etc.
3. Use the microwave oven in an ambient temperature 6. Place the microwave oven on a stable base.
of less than 104 F(40°C). 7. Avoid placing anything on the top cover of the
4. Avoid using the microwave oven where humidity is microwave oven that may interfere with the exhaust
high. vents.
OPERATION
———— Air Vent
Simulated Wood
Grain Cabinet
Control Panel
Turntable
Safety Door Lock System
CONTROL PANEL Fig. 1
NOTE: Model NE-8020 is provided with a capacitive touch control panel. A membrane push switch control panel is used
for models NE-7920 and NE-7920C.
NE-8020
Panasonic
2
See
Clock
Set
Button
Power/Time Stage Indicator Lights | _proveim onan A err ae ) Auto Sensor Status Indicator Lights
Timed Defrost Indicator Light
Digital Readout Display Window
P Indicator Light
RPP eee emg ae (clock/time/auto)
TIME & POWER COOKING PADS [7 Fy] (2. | E | 2 Gis Time es
See
So
See
Poe!
[1
||
Ges6)
heaa|
Gena
Cas
Power Select Pad rT oa [ = ] | Stand
Defrost Select Pad : —
Delay/Stand Select Pad—!| | [_ut2SensorContrr_} AUTO SENSOR CONTROL PADS
[ ac ] I aa COOK Select Pad
Mt DEFROST-COOK Select Pad
| etcatme [ eauienll COOK-WARM Select Pad
SE age eNOS DEFROST-COOK-WARM Select Pad
Al: Rehect Pasta Convenience Foods
Canned Foods
A2: Besi/Lamb-Well Beef/Lamb-Weil
A: Sealants Beat Lant-Med —] Auto Sensor Cooking Guide
Aa: bets, Beet-Rare Poultry
AS: Potatoes Carrots Fish Sea Foods
‘AG: Froz.Veg Chops Chops Hamburgers |
Consult Genius Guide tor proper cooking procedures f
Reset/Stop Pad pois (= Hy sen Pad
lhe .
“Genius
L MICROPROCESSOR CONTROL
Ad

NE-7920, NE-7920C |
Panasonic mio =— Clock Set Button
Auto Cook Indicator Light
Auto
Defrost-Cook
Indicator
Light
re
.?;
t=
=I
Delay/Stand
Indicator
Light
7
le
Power
Indicator
Lights
Lt
eco
s
=
Timed
Defrost
Indicator
Light
Digital
Readout
Display
=)
Wi
lock/ti
t
TIME
&
POWER
COOKING
PADS
indow
(clock/time/auto)
ee
a
ee
apa
[2]
[3]
7
Clock
Time
Auto
ime
ect
Fads
I
min
min
sec
sec
tee
eet
|
lee
oe
’
of
Defrost
Select
Pad
|
im
AS
Power
Select
Pad
ct
ont
|
[
roe
i=
AUTO
SENSOR
CONTROL
PADS
Delay/Stand
Select
Pad
—
COOK
Select
Pad
DEFROST-COOK Select Pad
i
i
Reset/Stop
pad
|
=
Pad
Auto Cook, Auto Def-Cook
Al Rehect Pasta A1 : Convenience Foods
Canned Foods
Pork Pot Roast
A3 Beet/Lamb-Med —-A3.: Beet Lamb-Med
Bacon Rice
Aa Beel-Rare A4: Beel-Rare Poultry
Fish Poullry
AS Polaloes Carrots AS: Fish Sea Foods
Auto Sensor Cooking Guide
AB Froz Veg Chops AG: Chops Hamburgers
Longuit Genius Gumte for penper cooking procedures
|
A2 Beel/Lamb-Well A2:Beel Lamb-Well
Pork
l
i
“ Cenius
:
MICROPROCESSOR
CONTROL
Fig. 3
NOTE:
When
the
oven
is
first
plugged
in,
Reset/Stop
pad
should
be
tapped
to
clear
the
display
window
orindicator
lights.
CONTROLS
Clock Set Button
When
oven
is
first
plugged
in,
the
Dispay
Window
will
show
00:00
and
the
colon
will
blink.
Exter
the
time
of
day
(TOD)
by
tapping
the
appropriate
Tinne
Select
Pads.
Example: If it is 10:25 (a.m. or p.m.), tap the 10 min.
pad once, the 10 sec. pad tvice, and 1 sec.
pad 5 times. The Display Wnclow will show
10: 25 with the colon blinking.
Push the Clock Set Button. The colon stops
blinking.
The
clock
is
set
ad
will
keep
the
TOD as long as the unit isplugged in and
electric energy is supplied.
NOTE: To reset the TOD in the Uisplay Window,
push the Clock Set Button aagn to clear the
time. Zeros (00:00) will jgoear with the
colon blinking. Enter the osrect TOD by
following the above procedure
a4

Timer Select Pads
[7 Y
‘is ao)
min Y, sec y,
min. min. — sec. sec.: : ‘Basic Time Setting
hour “H” min. min. --DELAY/STAND & LOW
Example 1: High — 13 min. 465 sec.
10min. pad : 1 tap
1min. pad : 3 taps
10sec. pad : 4 taps
1sec. pad :5 taps
Example 2: Low — 2 hours 25 min.
10 min. pad : 2 taps
10sec. pad : 2 taps
1 sec. pad :5 taps
*When DELAY/ STAND and (or) LOW are selected, the
Time
Select
Pads
change
to
hours
and
minutes.
The
ten
(10)
minute
pad
will
program
hours
in
the
display
window.
The
one
(1)
minute
pad
will
be
inoperable
and
display
H,
indicating
hours.
The
seconds
pads,
ten
(10)
and
one
(1),
will
program
minutes
in
the
display
window.
No
visible
second
countdown
will
be
seen
in
the
display
window
until
59
minutes
remain.
The
timer
will then display minutes and seconds.
Power Select Pad
ee $$
VA
Delay
Defrost Power / Stand
jtao : HIGH power 4taps :M. LOW power
2taps: M.HIGH power 5Staps :LOW power
3taos: MEDIUMpower 6taps :WARM power
NOTE: The following selections for 2-or 3-stage program
cooking are available in addition to any combina-
tion of powers.
© The same power in succession.
HIGH—> HIGH—>HIGH
e
Any
combination
of
powers
and
Stand.
HIGH—-*LOW->STAND
HIGH—>STAND—>LOW
@ Defrost to any combination
DEFROST->HIGH—>LOW
e Defrost to combination of any power and Stand.
DEFROST->HIGH->STAND
DEF ROST—>STAND-HIGH
© Delay to any combination of powers.
DELAY->HIGH*LOW
Delay to combination of any power and Stand.
DELAY+HIGH=STAND
of powers.
Defrost Select Pad
When
Defrost
is
selected,
the
cycle
will
also
program
an
automatic
stand
time
equal
to
defrost
time.
NN
Delay
=) |
|
Power
A,
Defrost
w
J
!
Delay
Power Stan y
LE
U
Delay/Stand Pad
To delay cooking or to program Stand Time after
cooking is completed.
NOTE: It is not always advisable to use Delay Start
when selecting any defrost function by time or
Auto Sensor cooking. If left in the oven too
long, some defrosting may take place before
Defrost or Auto Sensor cooking begins, causing
inacurate end results.
Auto Sensor Control Pads
Ttap : AUTO1 4taps : AUTO4
2taps : AUTO 2 5taps : AUTOS
3taps : AUTO 3 6 taps : AUTO6
For cooking foods from their natural storage places.
Meats, vegetables, casseroles, cake, etc.
Auto Sensor Control
Ea
Def-Cook
Def-Cook-Warm Cook-Warm
i
Defrost —Cook
For defrosting and cooking foods from the frozen state.
Meats, convenience foods, casseroles. etc.
Auto Sensor Control
[SI
SN
XS
Det-Cook-Warm Cook-Warm
O
Defrost-Cook—Warm] (Only for model NE-8020)
A complete cycle to defrost and cook foods from
frozen state, then keep warm for 1 hour. (If foods are
removed at end of cook, allow to stand according to
recipe directions).
Auto Sensor Control
EE =
(Only for model NE-8020)
For cooking foods from their natural storage place, then
keep warm for 1 hour.
(If foods are removed at end of cook, allow to stand
according to recipe directions.)
Auto Sensor Control
[ =» | | aie i
==) ZZ
AS