Panasonic NN-6207 User manual

ORDER NO. MOD87050806C1
Service
Manua
Microwave Oven
NN-6207
NN-6307
NN-6407
NN-6507
NN-6567
NN-6607
NN-6/707
NN-6757
NN-6807
Specifications
-——oatnuts
Powe
caine
OM
|
99 min. 99 sec. (Digital):--Touch Control moc!
30 min. (Rotary)---NN-6207
Outside
Dimensions
:
20-7/8"
(W)
X
14-3/4”
(D)
X
14”
(H)
Oven
Cavity
Dimensions
:
13-7/8"”
(W)
X
12-5/8”
(D)
X
10-1/4”
(H)
354 mm (W) X 320 mm (D) X 259 mm (H)
33 Ibs (15.0 kg) .
ject to change without notice.
Specifications sub
Matsushita
Services
Company
Panasonic
Hawaii
Inc.
Panasonic
Sig
Coompany,
50
Meadowland
Parkway,
91-238
Kauhi
St.
Ewa
Beach
Division
of
Migueshita
Electric
Secaucus,
New
Jersey
07094
P.O.
Box
774
of
Puerto
Ric;
inc.
Lal
Honolulu, Hawaii 96808-0774 Ave, 65 De Ininte fia, KM 9.7
Matsushita
Electric
Victoria
Indusjgy
fark
®
of
Canada
Limited
Carolina,
Puet
R@
co
00630
5770 Ambler Drive,Mississauga,
Ontario, L4W 2T3
Copyright©
1987
by
Matsushita
Electric
Corporation
of
America,
All
rights
reserved.

NN-6207, NN-6307, NN-6407
NN-6507,
NN-6567,
NN-6607,
NN-6757
NN-6707, NN-6807
This service manual covers products for following markets.
When troubleshooting or replacing parts, please refer to the country identifications shown below for your applicable products
specification.
APH--- For U.S.A and some of Latin America countries
CPH:-- For Canada
. WARNING
1. This product should be serviced only by trained qualified personnel.
2. Though this product has been manufactured in compliance with:
“Federal Performance Standard 21 CFR Subchapter J” (D.H.H.S.): U.S.A. models
or “Radiation Emitting Devices Act” (NHW): Canadian models
it is very important all repairs should be made in accordance with procedures described in this manual to avoid being exposed
to excessive microwave radiation.
"3. Check for radiation leakage after every servicing according to the “Procedure for Measuring Radiation Leakage” on page 22.
4. Any serviceman who learns of any accident pertaining to microwave radiation leakage should immediately notify the appropriate
address listed below.
IN U.S.A. Matsushita Services Company IN PUERTO RICO PSC
(MSC) 50 Meadowland Park way, (PSC) Ave. 65 De Infanteria, KM 9.7
Secaucus, New Jersey 07094 Victoria Industrial Park
Attention: Engineering Support Division. Carolina, Puerto Rico 00630
[phone] [phone]
IN HAWAII = PHI IN CANADA Matsushita Electric of Canada Limited
(PHI) 91-238 Kauhi St. Ewa Beach (MELCA) 5770 Ambler Drive, Mississauga,
P.O. Box 774 Honolulu, Hawaii 96808-0774 Ontario, L4W2T3
[phone] [phone]
5. There are special components used in the microwave oven which are important for safety. These parts are shaded on the
schematic diagram and marked with a A\ on the replacement parts list. It is essential that these critical parts should be
replaced with manufacturer's specified parts to prevent microwave leakage, shock, fire, or other hazards. Do not motify the
original design.
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 compartments, check the magnetron, wavegude or
the door open. — transmission line, and cavity for proper alignmet, in-
(B) Make the following safety checks on all ovens to be tegrity and connections.
serviced before activating the magnetron or other mic- (D) Any defective or misadjusted components in theinter-
rowave SOUIce, and make repairs as necessary: lock, monitor, door seal, and microwave geneation
(1) Interlock operation and transmission systems shall be repaired, repaced,
(2) Proper door closing or adjusted by procedures described in this marqual
(3) Seal and sealing surfaces (arcing, wear, and other before the oven is released to the owner.
damage) (E) A microwave leakage check to verify compliance: with
(4) Damage to or loosening of hinges and latches. the Federal Performance Standard should be per-
(5) Evidence of dropping or abuse formed on each oven prior to release to the ower.
(C) Before turning on microwave power for any service
test or inspection within the microwave generating

NN-6207, NN-6307, NN-6407
NN-6507, NN-6567, NN-6607, NN-6757
NN-6707, NN-6807
CONTENTS
(page)
LOCATION
OF
NAMEPLATE......csssssssssssssneesscesseatatserssessseenseseeee
3
CAUTIONS
TO
BE
OBSERVED
WHEN
TROUBLESHOOTING........-ssseeee
14
:
FEATURE
CHART
..s0ns-ccressserecersressssesonssnsvsssnensnessnesaeseorarseate
4
DISASSEMBLY
AND
PARTS
REPLACEMENT
PROCEDURE
.........++e+0s+s
15
CONTROL
PANEL...
s:cesscssssteseeessserorsscessonsressesenereneasnscecanasees
5
COMPONENT
TEST
PROCEDURE.
cic2:vaussicd
scassaascasdsascdscensuestis
19
|
OPERATION
PROCEDURE
(Touch
Control
models)
.....++seseesesereseseeeees
6
MEASUREMENTS
AND
ADJUSTMENTS
......:ssssssssersrersecsrsensssenens
21
|
SCHEMATIC
DIAGRAM
(NN-6207)....ssssesssesesssscsscerecesseeserenseesees
7
PROCEDURE
FOR
MEASURING
MICROWAVE
ENERGY
LEAKAGE..........
22
SCHEMATIC
DIAGRAM
(Touch
Control
models)
(APH)
....-+s+e+srrseseeees
8
TROUBLESHOOTING
GUIDE
(For
NN-6207)
......ssssssssssssesssteneesssees
23
SCHEMATIC
DIAGRAM
(Touch
Control
models)
(CPH)
.....-++sseseeeeesrens
9
TROUBLESHOOTING
GUIDE
(Touch
Control
models).......ssssssseeeeeeees
26
DESCRIPTION
OF
OPERATING
SEQUENCE.....ssssesssereseseesseesseeeereee
10
DIGITAL
PROGRAMMER
CIRCUIT
TEST
PROCEDURE
.......c:sssseseesees
33
AUTO
SENSOR
EXPLANATION,
EXPLODED
VIEW
AND
PARTS
LIST...s+scscscscsserssseressrsrsesstseseestirs
38
i
K
FACTORS
AND
POWER
LEVELS
.....ssssssssssssersssssesersrerseseaeneaees
12
FI
LOCATION
The
nameplate
is
located
on
frame
of
the
escutcheon
base
as
illustrated
i
The
model
and
serial
numbers
will
be
found
on
this
nameplate.
OF NAMEPLATE
N
Fig. A
n Fig. A.
—' 3 pants

NN-6207,
NN-6307,
NN-6407
NN-6507,
NN-6567,
NN-6607,
NN-6757
NN-6707,
NN-6807
2
FEATURE CHART
NN-6707
NN-6807
i
nn-ors7 | NWS007
NN-6507
NN-6567
NN-6307 Sater
NN-6407 ;
CYCLIC DEFROST
2-STAGE COOKING
3-STAGE COOKING
COOK
AUTO
COOK-WARM
SENSOR
FROZ-COOK
CONTROL
FROZ-COOK-WARM
AUTO WEIGHT DEFROST
AUTO WEIGHT COOK
AUTO WEIGHT FROZ COOK
AUTO REHEAT
TEMP PROBE COOK
AUTO START
MECHANICAL TIMER
MECHANICAL
VARI-POWER
>XNN-6407 only

NN-6807
NN-6607
NN-6407
CONTROL PANEL
NN-6707
NN-6757
NN-6507
NN-6567
NN-6307
NN-6207, NN-6307, NN-6407
NN-6507, NN-6567, NN-6607, NN-6757
NN-6707, NN-6807

NN-6207,
NN-6307,
NN-6407
NN-6507,
NN-6567,
NN-6607,
NN-6757
NN-6707,
NN-6807
:
OPERATION PROCEDURE (Touch Control models)
rt ar fiae ststiiciveinsunininssexabinantcatanamtaenahaasne
CLOCK
POWER
DEFROST
Cgc
foc
cao
(ao)
co
Clock Set
Time Cooking
(2-Stage)
Time Defrost
Auto Weight Defrost
Auto Weight Cook
Auto Weight
Frozen Cook
Auto Reheat
Temperature
Probe Cooking
If desired
Auto
Sensor
Cook
LESS
or
If desired
Frozen
Goo
[wore
]
[tess
]
Frozen
Cook
MORE
or
If desired
Cook
Warm
[wore
]
[ess
]
Cook
Warm
MORE
LESS
or
If desired
Auto Sensor
Froz Cook Warm
FROZ-COOK
WARM MORE | | LESS
or
For
more
detailed
operating
sequence,
See
pages
33
through
37.
NOTES WHEN PROGRAMMING:
CLOCK
SIT:
:
(1)
To
reset
time
of
day
(TOD)
tap
Clock
Pad
twice
to
clear
the
time
and
enter
the
correct
TOD.
;
;
at
(2)
The
clock
will
keep
the
TOD
as
long
as
oven
is
plugged
in
and
electricity
is
supplied.
AUTO
WEIGHT
DEFROST:
(1)
Stand
time
or
time
cooking
can
be
programed
after
Auto
Weight
Defrost.
(2)
Auto
Start
can
not
be
programed
before
Auto
Weight
Defrost.
—
(3)
The
shape
and
size
of
the
food
will
determine
the
maximum
weight
the
oven
can
accommodate.
AUTO
WEIGHT
COOK:
(1)
Stand
time
or
time
cooking
can
be
programed
after
Auto
Weight
Cook.
(2)
The
shape
and
size
of
the
food
will
determine
the
maximum
weight
the
oven
can
accommodate.
AUTO
WEGHT
FROZEN
COOK:
(1)
Stand
time
or
time
cooking
can
be
programed
after
Auto
Weight
Frozen
Cook.
(2)
The
shape
and
size
of
the
food
will
determine
the
maximum
weight
the
oven
can
accommodate.
AUTO FRENEAT:
(1)
Stand
time
or
time
cooking
can
be
programed
after
Auto
Reheat.
POWER [+] [| START
START
START
ca
ca
==]
ca
AUTO SENSOR COOKING:
(1) The Auto Sensor system works by detecting a build-up steam o the humidity
sensor. As foods cook in a microwave oven, steam is produced. When foods are
covered, the steam will build up and escape from the dish in a turst when this
burst of steam is detected by the humidity sensor the oven autonatically calcu-
lates the remaining cooking time.
(2) When an Auto Sensor Cycle is selected, Al through A8 will appeain the display
window. The oven door should not be opened for longer than on: minute when
At through A8 appears in the display window. Opening the dr may cause
inaccurate cooking results. Once the steam is detected, a two beepsig nal is heard
the remaining cooking time immediately appears in the display widow and be-
gins to count-down. At this time, the oven door may be opened stir, turn or
add foods.
(3) The room air temperature surrouding the oven should not be abve 95°F when
using Auto Sensor Cooking feature. Inaccurate cooking may result
(4) Foods less than 3 or 4 ounces should be cooked by power and tine , not by the
Auto Sensor Cooking Cycle.
TEMPERATURE PROBE COOKING:
(1) Temperature probe must be insurted at least one inch into center ¢ food.
(2) Do not store probe inside oven cavity. Should oven be turned q accidentally,
damage to probe and/or oven may result.
(3) Do not allow temperature probe tip to touch surface of oven wi. Damage to
probe and/or oven may result.
(4) If the second stage temperature is lower than the first stage tempentu re, the oven
will turn off after the first stage cooking of cooking is completed.
—-6-—
SARA A RP A cD INANE tL ANNEAL nt AA EAE A IEE ISAS AMID ERECT AOE AAD EEE CEN REIS NOH Nl ett ta tN OR RIS Bt a hy Sih eh Kins ABASIC et Le Stet i AS RRMEA RNS an a

NN-6207, NN-6307, NN-6407
NN-6507, NN-6567, NN-6607, NN-6757
NN-6707, NN-6807
\
.
~~»
SCHEMATIC
DIAGRAM
(NN-6207)
at
SCHEMATIC
DIAGRAM
NOTE:
Door
is
closed.
Timer switch is off. == Ground 7}, Chassis
This model does not have a start button and
PLUG therefore microwave activity will start as soon
WHITE BLACK as the door is closed and timer is set.
Special caution must be taken when working
(1) on with the oven energized.
THERMAL
CUTOUT Re 5
(MAG.)
THERMAL
CUTOUT
(OVEN) r--
SWITCH
IMPORTANT SAFETY NOTE: THE SHADED AREA ON THIS SCHEMATIC DIAGRAM INCORPORATES SPECIAL FEATURES
IMPORTANT FOR PROTECTION FROM MICROWAVE RADIATION, FIRE AND ELECTRICAL SHOCK HAZARDS.
WHEN SERVICING, IT IS ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE
CRITICAL COMPONENTS IN THE SHADED AREAS OF THE SCHEMATIC DIAGRAM.
WIRING DIAGRAM
THERMAL
CUTOUT
(OVEN)
LATCH
SWITCH A
MOTOR
COIL{S-6)
SWITCH 8
TURNTABLE
MOTOR
BLA
hy OO
HIGH VOLTAGE
CAPACITOR
nasdninisssenslsatstie ta bud pet’ Saath semen ae HAM MCAS RCN OR hc Sneha EAC SNS a ll

NN-6207, NN-6307,
NN-6407
NN-6507,
NN-6567,
NN-6607,
NN-6757
NN-6707,
NN-6807
SCHEMATIC DIAGRAM (Touch Control models) (APH)
SCHEMATIC
DIAGRAM
Meer
nie
net
coaabéa.
= Ground
PLUG d
WHITE BLACK 777 Chassis
THERMAL
CUTOUT
(MAGNETRON)
TEMP PROBE
(NN-6607)
Low NOLTAGE
FoR HUMIDITY SENSOR
(NN~6707/6807)
TEMP SENSOR
(THERMAL PROTECTOR)
IMPORTANT SAFETY NOTE: THE SHADED AREA ON THIS SCHEMATIC DIAGRAM INCORPORATES SPECIAL
FEATURES IMPORTANT FOR PROTECTION FROM MICROWAVE RADIATION, FIRE AND ELECTRICAL SHOCK
HAZARDS. WHEN SERVICING, IT IS ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED
FOR THE CRITICAL COMPONENTS IN THE SHADED AREAS OF THE SCHEMATIC DIAGRAM.
WIRING DIAGRAM
THERMAL
CUTOUT
[213T+[sTel7[s {sho}
SWITCH A
{NN-6707/6807)
| HUMIDITY SENSOR
or) TY) [1] i a8
@ OOD @®
]
©
oR
DIGITAL
PROGRAMMER
SWITCH 8 emRcUIT
TURNTABLE
MOTOR
TRANSFORMER

NN-6207, NN-6307, NN-6407
NN-6507, NN-6567, NN-6607, NN-6757
NN-6707, NN-6807
SCHEMATIC
DIAGRAM
(Touch
Control
models)
(CPH)
s is closed.
SCHEMATIC DIAGRAM Saad a Prcareear ey
PLUG
WHITE BLACK
= Ground
WHEN
SERVICING,
IT
IS
ESSENTIAL
THAT
ONLY
MANUFACTURES
SPECIFIED
PARTS
BE
USED
FOR
THE
CRITICAL
WIRING
DIAGRAM
re
ann
[o——
(Paovecror
)
(NN-6707/6757
COMPONENTS
IN
THE
SHADED
AREA
OF
THE
SCHEMATIC
DIAGRAM.
76807;
HUMIDITY
SENSOR
DIGITAL
PROGRAMMER
CIRCUIT
SYMBOL
o|Q
RE
alo
Ala
HIGH VOLTAGE
CAPACITOR
Hele
7 A}3\8|9 5|2lml&
2/3 /A\<
HIGH VOLTAGE
TRANSFORMER
a
2
= Fz
Cc
min
7
4
|
OVEN j
60Hz (t)
wot, ad a TEMP PROBE
Talal
(NN-6607)
I
: : HUMIDITY SENSOR
FL (NN-6707/6757/6807)
TEMP SENSOR A
(THERMAL PROTECTOR)
IMPORTANT
SAFETY
NOTE:
THE
SHADED
AREA
ON
THIS
SCHEMATIC
DIAGRAM
INCORPORATES
SPECIAL
FEATURES
IMPORTANT
FOR
PROTECTION
FROM
MICROWAVE
RADIATION,
FIRE
AND
ELECTRICAL
SHOCK
HAZARDS.
ERI
SI

NN-6207, NN-6307, NN-6407
NN-6507, NN-6567, NN-6607, NN-6757
NN-6707, NN-6807
DESCRIPTION OF OPERATING SEQUENCE
1. Variable power cooking control (NN-6207)
The vari-power controller controls the ON-OFF time of the vari-power OUTPUT POWER ON, OFF TIME ON
switch to vary the output power of the microwave oven from “Warm” to INDICATION oe VARI-POWER SWITCH/
“High”. The vari-power controller is a part of the timer assembly. The ra TOMER POWER RELAY B
timer assembly consists of timer motor, timer switch, vari-power switch 225 225
and the combination of gears, cam and actuater lever. 22/22 (700W) ON aa
One complete cycle of the vari-power controller is 22 seconds, in which
-
.
'
“
”
“
”
.
;
17S
5S
the vari-power switch is tumed “ON” or “OFF” by the cam rotation in | 47/22 (70%)
13S 9s
Defrost 138
Ss 14S
Low 8/22 (30%) ON OEE
4S 18S
Warm 4/22 (15%)
Defrost Approx. Please refer to description
(Touch model) 110W of cyclic defrost.
H
the 22 - 2 second period.
By controlling the timing of the vari-power switch “ON” period, the
120V AC supplied to the high voltage transformer is interrupted intermit-
tently so that the average output power of the microwave oven is varied.
Fig. 4 shows the timing chart of vari-power switch operation in respect
to the power setting on the control panel.
NOTE: The ON/OFF time ratio does not correspond with the percentage of
microwave power since approximately 2 seconds are required for
heating of magnetron filament.
1”. Variable power cooking contro! (Touch control models)
The coil of power relay B (RY2) is energized intermittently by the digital
programmer circuit, when the oven is set at any power selection except
for High power position. The digital programmer circuit controls the ON-
OFF time of power relay B contacts in order to vary the output power of
the microwave oven from “Warm” to “High” power. One complete ON
and OFF cycle of power relay B is 22 seconds.
The relation between indications on the control panel and the output of
the
microwave
oven
is
as
shown
in
Fig.
4
ae
om
ae
=
a
NOTE: The ON/OFF time ratio does not correspond with the percentage of ig AN De RA aavered
microwave power since approximately 2 seconds are required for
heating of magnetron filament.
2. Cyclic defrost (Touch control models)
When defrost power and defrosting time are selected and Start pad is
j
i
Fig. 4
TOTAL DEFROSTING TIME
tapped:
(A)
The
digital
programmer
circuit
(DPC)
divides
the
total
defrosting
time
Fig.
5
into
8
equal
periods, consisting
of
four
defrosting
periods,
each
followed
by
astanding
periods.
(See
Fig.
5)
(B)
During
defrosting
power
ee
power
in
hg
is
energized
for
9
ONE
DEFROSTING
PERIOD(T-@)
:
seconds
and
de-energized
for
13
seconds
by
DPC.
(See
Fig.
6)
vs
198
98
198
(C) During standing periods, power relay B is always open resulting in no ‘Ic = ce ae aa
microwave power.
NOTE: Defrost time selected is converted into seconds by the DPC but
display will show selected time in minutes and seconds as prog-
rammed. The total number of seconds is divided into 8 time
periods. The remainder (seconds not equally divisible by 8) are
added to the last standing time period.
Example
1:
If
defrosting
time
is
selected
for
2
minutes
56
seconds,
each
Fig.
6
operating
period
will
be
as
follows
:
(See
Fig.
7)
2
minutes
56
seconds
=
176
seconds
2MIN_S6SECLI76SEC)
176/38
=
22
DCFROSTINO(
228)
STANDING(228)
DEFROSTING(
228)
SPNOING(22S)
OSFROSTING(
228
Stance
2
25)
Example 2: If defrosting time is selected for 5 minutes, each operating
period will be as follows : (See Fig. 8)
5 minutes = 300 seconds
300/8 = 37 and remainder is 4 seconds.
The 4 seconds is added to the last time period.
NOTE: When defrosting time is selected for not more than 7 seconds, the
power relay B will not be energized at all.
Fig. 7
SMIN (300SEC)
1ST
1sT 2N0 2N0 ast
SFROSTING( 37S} STANDING(37S) )OEFROSTING(37S) STANODINGI3/S) thee NDING. 418)
93) 138 | 98163,
Fig. 8