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HAD0801001C2
Microwave Oven
NN-CD748BBPQ
27L UK .
.
.
! WARNING
This service information is designed for experienced repair technicians only and is not designed for use by the
general public. It does not contain warnings or cautions to advise non-technical individuals of potential dangers
in attempting to service a product. Products powered by electricity must be serviced or repaired only by expe-
rienced professional technicians. Any attempt to service or repair the product or products dealt with this service
information by anyone else could result in serious injury or death.
IMPORTANT SAFETY NOTICE
There are special components used in this equipment which are important for safety. These parts are marked
by (!) in the schematic diagrams, circuit board diagrams, exploded views and replacement parts lists. It is
essential that these critical parts are replaced with parts specified by the manufacturer, preventing shock, fire
or other hazards. Do not modify the original design without permission from the manufacturer.
1 Contents
1 Contents ......................................................................................................... 2
2 Feature Chart .................................................................................................. 3
3 Control Panel ................................................................................................... 4
4 Inverter Warnings ........................................................................................... 5
5 Schematic Diagram .......................................................................................... 6
6 Wiring Diagram ................................................................................................ 7
7 Description of the Operating Sequence ............................................................. 8
8 Cautions to be Observed when Troubleshooting .................................................10
9 Parts Replacement Procedure........................................................................... 12
10 Component Test Procedure............................................................................... 15
11 Measurements and Adjustments....................................................................... 17
12 Troubleshooting Guide..................................................................................... 18
13 Parts List........................................................................................................ 24
14 Exploded View................................................................................................. 26
15 Door Assembly................................................................................................ 27
16 Escutcheon Base.............................................................................................. 28
17 Packing and Accessories................................................................................... 29
18 Digital Programmer Circuit................................................................................ 30
Power source 240V AC Single Phase 50Hz
Power requirements Microwave 1170W
Grill 1360W
Convection 1470W
Convection + Grill 2770W
Micro + Grill Combi 2400W
Micro + Convection Combi 2515W
Micro + Grill + Convection Combi 2515W
Output (IEC60705) Microwave 1000W
Grill 1300W
Convection 1400W
Microwave frequency 2450Mhz
Timer 99 min 99 second
Oven cavity size 27L
Outside dimensions 510mm(W) x 477mm(D) X 304MM (H)
2
2 Feature Chart
Function BPQ
Microwave 6
Grill 3
Convection 17
Combi Yes
Sensor Reheat -
Sensor Cook -
Sensor Combi -
Weight Defrost 3
Weight Combi 8
Weight Reheat 4
Weight Cook 2
Memory Cook 3
Weight Crisp -
Stage Cooking 3 stage
Delay / Stand Yes
More / Less No
Kg -> lb/oz Yes
Clock 12h
Word Prompt English
Step by Step No
3
3 Control Panel
(2) (1) Display Window
(1)
(2) Microwave Power Pad
(3) Grill Pad
(3) (4) Convection Pad
(5) TURBO-BAKE Pad
(6) Auto Weight Programs Pad
(4)
Auto Menu/ (7) Auto Weight Defrost Programs (Chaos Defrost)
Temperature (8) Memory Pad
(10) (9) Timer Pad:
(5) This can be used to delay a cooking program for up to 9 hrs or
Turbo Bake used as a timer or for standing (non-cooking) time. It is also
used to set the clock.
(6) (10) Auto Menu/Temperature/Microwave Wattage/Grill
Time/ Level/Selector Dial.
Weight
(11) Time/Weight Dial
(11) (12) Stop/Cancel Pad:
(7)
Before Cooking:
Chaos
one press clears your instructions.
During Cooking:
(8) M one press temporarily stops the cooking program. Another press
Memory Start cancels all your instructions and the time of day will appear in
the display.
(9) (13) (13) Start Pad:
Press to start operating the oven.
If during cooking the door is opened or Stop/Cancel Pad is
pressed once, Start Pad has to be pressed again to continue
(12) cooking.
NN-CD757W
Beep Sound:
* The design of your control panel may A beep sounds when a pad is pressed. If this beep does not sound, the
vary from the panel displayed (depending setting is incorrect. When the oven changes from one function to another,
on colour), but the words on the pads will two beeps sound. After completion of cooking, five beeps sound.
be the same.
4
4 Inverter Warnings
The inverter circuit board supplies the magnetron tube with a very high voltage (4000 volts).
Danger