Panasonic NE-992 User manual

Service
Mantua.
NE-992, NE-993
NE-972
For United Kingdom
For NAAFI
DIMENS:ONG eee! || | DIMENSIONS
NE-992,
NE-993
NE-972
Power
Requirement:
=
|
2&8
KW
(11.0
Apr
Maximum
Required
Power
(Microwave
&
Grill
Heater)
(Convection
Heater
&
Grill
Heater)
1.2 KW (5.6 A):+:: Microwave
1.2 KW Convection Heater
1.5 kW Grill Heater
Pepi
|
80
WF
Mra
Poe
Oscillation
Frequency
:
2,450
MHz
568 mW) X 495 rm (D) % 386 men (A
pW:
Ci
Specifications subject to change without notice.
-
j j
ing
Co.,
Ltd.
Panasonic
ee

WARNING
* This product should be serviced only by trained, qualified personnel. As for the oven lamp, it is replaceable by the
users.
* This service manual covers products for following markets.
When troubleshooting or replacing parts, please refer to the country identifications shown below for your applic-
able product specification.
For United Kingdom
For NAAFI
CONTENTS
OUTLINE DIAGRAM & CONTROL PANEL
NE-992/NE-993
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7
SCHEMATIC DIAGRAM
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9
DESCRIPTION
OF
OPERATING
SEQUENCE
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AUTO
SENSOR
EXPLANATION,
K
FACTORS
AND
POWER
LEVELS:
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CAUTIONS TO BE OBSERVED WHEN TROUBLESHOOTING: :::----- Jagdine Seahees WgdesvaaUaduetcdea wed decease dovae det asses vatea sedans coedeue evensersgseeer vane Seobesgs 18
DISASSEMBLY AND PARTS REPLACEMENT PROCEDURE: ::11rr:cstseeertseerereetetteeeeenteeeectnseeeereeeertseeeeen nines esennenegaaeeesrnnneeerenernens sannnnes 19
COMPONENT TEST PROCEDURE <vrreeeesrececrteeseeeseesereeeceeeeeeeaeeeeeeneeeseneneeeerseeeesnseeeenisaeessseeteesesceseseeanerecereneeeeeeesenenreeeeesnn ceeees 23
MEASUREMENTS AND ADJUSTMENTS ‘crccerescccteersseesesteteseeeeeeeenessseeennneesenseeeesssseeserseeeeenseesensasasesensteeeersaneeecaeeeensneeecererteis cenernes 25
TROUBLESHOOTING GUIDEs +s ceesccestresteereeerseeeseetseeseeeneeneeeneens teen senna ee teens eeneeen eee eeeeenee sete ee ene ee eee teeeeeeeneecneaeeeeeeeneesneeeteeeie oeetse 26
DIGITAL PROGRAMMER CIRCUIT TEST PROCEDURE
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EXPLODED
VIEW
AND
PARTS
LIST
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NE-972
OUTLINE DIAGRAM & CONTROL PANEL (NE-992/NE-993)
Outline Diagram jini
@ Oven Window
@ Door Safety Lock System
Before any cooking function can begin, oven door
must be securely shut.
@ Oven Light
Will turn on whenever the door is opened or during
cooking. :
@ Oven Light Cover
Allows easy access to replace the oven light.
© Oven Air Vents
Never block air vents during cooking.
© Control Panel
See below.
@ Ceramic Tray
Must be placed in the oven before cooking.
Roller Ring
Must be placed in the oven before cooking.
@© Nameplate
Control Panel wri NEE
@ Controls with Auto Count-Up Feature
@ Cyclic Defrost Pad
@ Grill Pad
@ Auto Sensor
Cooking Pad
@® Adjust to
Taste Pad
@ Auto Weight
Defrost Pad
® Auto Weight
Combination Pad
@ Kg/ib Convert Pad
Display Window
Time Pads
Power Pad
Combination Pad
Dual-Shelf Pad
Convection
Temperature Pad
Cooking Guide
1kg/1 Ib Pad
0.1 kg/1.0 oz Pad
Start Pad
Door Opener Button

NE-972
OUTLINE DIAGRAM & CONTROL PANEL (NE-972)
Outline
Diagram
writin
cient
@ Oven Window
@ Door Safety Lock System
Before any cooking function can begin, oven door
must be securely shut.
@ Oven Light
Will turn on whenever the door is opened or during
cooking.
@ Oven Light Cover
Allows easy access to replace the oven light.
© Oven Air Vents
Never block air vents during cooking.
© Control Panel
See below.
@ Ceramic Tray
Must be placed in the oven before cooking.
Roller Ring
Must be placed in the oven before cooking.
@ Nameplate
Control
Panel
witisuiieiaveiinieinininieaeiae
TEETER
@ Controls with Auto Count-Up Feature
Display Window
Time Pads
Power Pad
@
Cyclic
Defrost
Pad
Combination
Pad
Grill
Pad
Dual-Shelf
Pad
Convection
Temperature
Pad
1: Best (Rare} 5. Lamb (W Done)
®
Auto
Weight
2:
Beet
(Medium)
6
-
Pork
Gammon
Combination
Pad
3
eet
(W
Dona)
7:
Chacon
4: Lammy (Medaumn) 8 + Turkary
Cooking Guide
ig 1kg/1 Ib Pad
® Kg/lb Convert Pad 0.1 kg/1.0 oz Pad
@ Clock Pad
@®
Stop/Cancel
Pad
216
Start
Pad
Door Opener Button

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NE-972
OPERATION GUIDE FOR NE-992 & NE-993
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NE-972
OPERATION GUIDE FOR NE-972
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ACCESSORIES
Accessories wiiiiiitiiiiiimiiminiminiaianitii
Accessories and Use
CO
=
=
Drip Tray-Grill Pan Splash Guard Ceramic Tray
(ANE0603Z705P) (ANE0648Z70BP) (ANE0601Z70BP)
Splash Guard: Ceramic Tray:
Use with the Drip pan. Splash Oven should not be operated
Guard helps prevent splashing. without the Ceramic Tray.
High-Rack Baking Tray Handle
(ANE0602Z70BP) (ANE0641Z70BP) (ANE0709Z70BP) (ANE0604-F 20)
Followings are the recommendabie usages:
Low-Rack
Drip Tray-Grill
Pan
High-Rack
Drip Tray-Grill Pan Low-Rack
CONVECTION/ DUAL-SHELF COOKING GRILL/GRILL COMBINATION
CONVECTION COMBINATION
Do not use the following accessory combination Do not use the following except during convection
in any case:
Drip Tray-Grill Pan
High-Rack
Further instruction will be given in the instruction section of applicable cookbook.

SCHEMATIC DIAGRAM (NE-992, NE-993 BPQ/PPQ)
SCHEMATIC DIAGRAM
tH — —
YELLOW/GREEN
WIRING DIAGRAM
POWER AELAY 3
(UPPER)
|
NNN
Hf
NOISE FILTER
VARISTOR
SUAGE ABSOABEA
Note: *Door is closed.
*Unit is not operated yet.
THERMAL
CUTOUT (OVEN)
GRILL HEATER
CONVECTION HEATEA
OVEN LAMP
240V 25W
TURN TABLE
MOTOR
RELAY 7
SHORT SWITCH
AHooonad 1000000000
RELAY 3
SAFETY SWITCH 8 2aov *
bass
HUMIDITY SAFETY SWITCH A
SENSOR HEATER {DOOR SIGNAL SWITCH)
LOW VOLTAGE
TRANSFORMER
TAI. AY.7 A
DIGITAL PROGRAMMER CIRCUIT
(F=4,49MH2)
Caen em ertnslrimnnnenmnrrnrenremernemennarer eres are tices TI seme” ame mmm noe eee nail
Note: *When replacing, check the lead wire colour as shown.
*Colours shown by ( ) indicate colours of lead
wire connector housing. "4
POWER RELAY 2
(CENTER)
DIGITAL PROGRAMMER CIRCUIT
POWEA RELAY S
{LOWER)
SHORT SWITCH
: 8/BL
SAFETY SWITCH B
HUMIDITY SENSOR
COL OUR
po once
Pe [oom |
cco
aco
Pep]
acce
(S-Z73 P)
Fig. 1A

|__NE-972
SCHEMATIC DIAGRAM (NE-972 BPQ/PPQ)
SCHEMATIC
DIAGRAM
Note:
*Door
is
closed.
“Unit
is
not
operated
yet.
THERMAL
NOISE_FILTER CUTOUT (OVEN) re 5
'
he ms
IELAY 6
———1
OVEN LAMP
240V 25W
'
LIAGE TRANSFORMER =O S
VARISTOR
GRILL HEATER
CONVECTION HEATER
FAN MOTOR | A
CONVECTION
SHORT SWITCH
THERMAL
CUTOUT
{MAGNE TRON)
FILTER COIL 0,2mHx2
RELAY 3
SURGE ABSORBER
Fear |
00066000600000090006.
YELLOW/GREEN
RELAY 2
SAFETY SWITCH A
(DOOR SIGNAL SWITCH)
LOW VOLTAGE
TRANSFORMER
TEMPERATURE
DIGITAL PROGRAMMER CIACUIT
(F=500KH2)
-_
SS
WIRING
DIAGRAM
Note:
“When
replacing,
check
the
lead
wire
colour
as
shown.
*Colours shown by ( ) indicate colours of lead
wire connector housing.
SYMBOL COLOUR
SHORT
SWITCH
|
an
|
BROWN
ce
. [ee
aa
SAFETY SWITCH A
W/W (G)
POWER RELAY 2 POWER RELAY 3 POWER RELAY 5
(LOWER LEFT) (LOWER RIGHT) (UPPER)
LIGHT
BLUE
BLACK
DIGITAL PROGRAMMER CIRCUIT SAFETY SWITCH B
(S-R7BP)

NE-9/2 |
DESCRIPTION OF OPERATING SEQUENCE
1, Variable power cooking control
The coil of power relay (5) is energized intermittently by the digital Power setting | Output Power
programmer circuit, when the oven is set at any power selection ex-
cept for High power position. The digital programmer circuit controls
the ON-OFF time of power relay (5) contacts in order to vary the out- ;
put power of the microwave oven from “Warm” to “High” power. One Ly | 6OOW (22/22)
complete ON and OFF cycle of power relay (5) is 22 seconds.
The relation between indications on the control panel and the output ‘fi
On-Off Time of
Power Relay (5)
of the microwave oven is as shown in Fig. 2A. Medium ™ | 480W (19/22)
NOTE: The ON/OFF time ratio does not correspond with the percentage
of microwave power since approximately 2 seconds are required 45 Gad. 237-566
for heating of magnetron filament Co | 360W (15/22)
2. Cyclic defrost
When defrost power and defrosting time is selected and Start pad is
touched: 180W (9/22)
(A) The digital programmer circuit (DPC) divides the total defrosting time
into 8 intervals of alternating defrosting power and standing periods.
(See Fig. 2B) 70W (4/22)
(B) During defrosting power period, power relay (5) is energized for 10
seconds and de-energized for 12 seconds by DPC. (See Fig. 2C)
{C) During Standing periods, power relay (5) is always open resulting in Approx. 120W| Refer to description of cyclic defrost.
no 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 operating period will be as follows : (See Fig. 2D)
2 minutes 56 seconds = 176 seconds 176/8 =
Example # 2: If defrosting time is selected for 5 minutes, each operating DEFROST DEFROST DEFROST
period will be as follows : (See Fig. 2E)
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, Fig. 2B
the power relay (5) will not be energized at all. :
Fig. 2A
TOTAL DEFROSTING TIME (T)
ONE DEFROSTING PERIOD
2 MIN..56 SEC. (176 SEC.)
ONE ONE ONE
elie STANDING DEFROSTING
(228) (22S)
}OSEC
,
12SEC.
|
Se
asec
}0SEC
,
128eC
_|
Fig. 2D
5 MIN. (300 SEC}
1ST 2ND
ane woe NG STANONG
)
(415)
ALL OFF ALL OF
Fig. 2E