R-21ATP - Sharp Home Appliance Service Manual (repair manual). Page 5

3

1. Digital Readout
2. DOUBLE QUANTITY pad
3. EXPRESS DEFROST pad
4. Number pads for time and memory program-

ming

5. SELECT TIME pad
6. STOP/CLEAR pad; touch to stop operation of

oven and clear remaining heating time

7. SELECAT POWER pad for setting variable

power level

8. START pad; touch to operate oven after door

is closed and time is set

9. SET pad for setting memory
10.CHECK pad for checking memory
11.SIGNAL pad for setting signal sound

1. Oven light
2. Ceramic shelf
3. Control panel
4. Cavity face plate
5. Door latch openings
6. Door latches
7. Door hinges
8. Door seals and sealing surfaces
9. Door handle
10.Oven door with see-through window
11.Air ventilation cover and openings
12.Power supply cord
13.Air intake openings
14.Outer case cabinet

When this commercial  microwave oven is installed near other commercial electrical appliances, connect a lead wire to
each equivalent potential terminal with equipotential marking between them (insert a lead wire between a washer and
an earth angle, and screw them), as shown in Fig. A-1, to make sure that they are at equivalent potential.
If any lead wire is not connected between them, when person touch them he/she will get a electric shock.

COMMERCIAL MICROWAVE OVEN

OTHER COMMERCIAL 
ELECTRICAL APPLIANCE

Lead wire

Equipotential marking

Earth angle
(Equipotential terminal)

Equipotential 
terminal

Screw

Washer

Lead wire

DEF

ON

NO. X2 CHECK

1

3

4

6
8
11

2

5

7
9
10

12

11

7

10

9

5

4

3

13

14

8

1

2

6