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In the interest of user-safety the oven should be restored to its original
condition and only parts identical to those specified should be used.

Page

SERVICING ................................................................................................................. INSIDE FRONT COVER
CAUTION, MICROWAVE RADIATION .............................................................................................................  1
WARNING .......................................................................................................................................................... 1
PRODUCT SPECIFICATIONS .........................................................................................................................  2
GENERAL INFORMATION ................................................................................................................................ 2
APPEARANCE VIEW .......................................................................................................................................  3
OPERATION .....................................................................................................................................................  4
FUNCTION OF IMPORTANT COMPONENTS ................................................................................................. 6
TROUBLESHOOTING GUIDE .........................................................................................................................  7
TEST PROCEDURE .........................................................................................................................................  9
CONTROL UNIT ASSEMBLYL ........................................................................................................................ 16
PRECAUTIONS FOR USING LEAD-FREE SOLDER ..................................................................................... 20
PROCEDURE FOR CHECKING/ SETTING TOTAL OPERATION TIME ....................................................... 20
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE ............................................................ 21
SERVICE MAINTENANCE CLEANING ........................................................................................................... 28
MICROWAVE MEASUREMENT ....................................................................................................................  28
WIRING DIAGRAM .........................................................................................................................................  29
PICTORIAL DIAGRAM ...................................................................................................................................  32
POWER UNIT, CPU UNIT AND CONTROL UNIT CIRCUIT ........................................................................... 33
GRID ASSIGNMENT OF FLUORESENT DISPLAY TUBE ............................................................................. 34
PRINTED WIRING BOARD ............................................................................................................................. 34
PARTS LIST ...................................................................................................................................................  36

1) Disconnect the supply.
2) Door opened, and wedged open.
3) To discharge the high voltage capacitor, wait for 60

seconds.

WARNING: AGAINST THE CHARGE OF THE

HIGH-VOLTAGE CAPACITOR

The high-voltage capacitor remains charged about
60 seconds after the oven has been switched off.
Wait for 60 seconds and then short-circuit the
connection of the high-voltage capacitor (that is, of
the connecting lead of the high-voltage rectifier)
against the chassis with the use of an insulated
screwdriver.

Sharp recommend that wherever possible fault-finding
is carried out with the supply disconnected. It may, in
some cases, be necessary to connect the supply after
the outer case has been removed, in this event carry
out 3D checks and then disconnect the leads to the
primary of the power transformer. Ensure that these
leads remain isolated from other components and the
oven chassis. (Use insulation tape if necessary.) When
the testing is completed carry out 3D checks and
reconnect the leads to the primary of the power trans-
former.

1) Reconnect all leads removed from components during

testing.

2) Replace the outer case (cabinet) and back plate.
3) Reconnect the supply.
4) Run the oven. Check all functions.

 Microwave ovens should not be run empty. To test for
the presence of microwave energy within a cavity,
place a cup of cold water on the oven turntable, close
the door and set the power level to HIGH. And set  the
microwave timer for two (2) minutes. When the two
minutes has elapsed (timer at zero) carefully check
that the water is now hot. If the water remains cold carry
out 3D checks and re-examine the connections to the
component being tested.

When all service work is completed, and the oven is

fully assembled, the microwave power output should be checked and microwave leakage test should be carried
out.

Microwave ovens contain circuitry capable of producing very high voltage and current, contact with following parts
of the high voltage circuit will result in electrocution. High voltage capacitor, High voltage transformer, Magnetron,
High voltage rectifier assembly, High voltage fuse, High voltage harness.

1

This Manual has been prepared to provide Sharp Corp. Service
engineers with Operation and Service Information.

It is recommended that service engineers carefully study the
entire text of this manual, so they will be qualified to render
satisfactory customer service.

Service engineers should not be exposed to the microwave
energy which may radiate from the magnetron or other microwave
generating devices if it is improperly used or connected. All input
and output microwave connections, waveguides, flanges and
gaskets must be secured. Never operate the device without a
microwave energy absorbing load attached. Never look into an
open waveguide or antenna while the device is energized.

Never operate the oven until the following points are en-
sured.
(A) The door is tightly closed.
(B) The door brackets and hinges are not defective.
(C) The door packing is not damaged.
(D) The door is not deformed or warped.
(E) There is not any other visible damage with the oven.

Servicing and repair work must be carried out only by
trained service engineers.

All the parts marked "*" on parts list are used at voltages
more than 250V.

Removal of the outer wrap gives access to potentials above
250V.

All the parts marked "

∆" on parts list may cause undue

microwave exposure, by themselves, or when they are
damaged, loosened or removed.

TEST PROCEDURE

SERVICING AND
TROUBLESHOOTING CHART

FUNCTION OF IMPORTANT
COMPONENTS

OPERATING SEQUENCE

APPEARANCE VIEW

PRODUCT SPECIFICATIONS

WIRING DIAGRAM

PARTS LIST

MICROWAVE MEASUREMENT

CONTROL PANEL ASSEMBLY

COMPONENT REPLACEMENT
 AND ADJUSTMENT PROCEDURE

2

THE WIRES IN THIS MAINS LEAD ARE COLOURED IN ACCORDANCE WITH THE FOLLOWING CODE:

GREEN-AND-YELLOW

: EARTH

BLUE

: NEUTRAL

BROWN

: LIVE

Power Requirements

230 - 240 Volts / 50 Hertz / Single phase, 3 wire earthed

Power Consumption

Microwave cooking

1.65 kW Approx. 7.2 A

Oven cooking

2.7 kW Approx. 11.3 A

Speed cooking

2.8 kW Approx. 11.7 A

Power Output

900 W nominal of RF microwave energy (measured by method of IEC 60705)
Operating fequency 2450 MHz

Top heating element Power Output

1500 W

Side heating element Power Output

1000 W

Case Dimensions

Width 550 mm

Height 420 mm (including foot)

Depth 640 mm

Cooking Cavity Dimensions

Width  408 mm

Height 214 mm

Depth 345 mm

Turntable diameter

330 mm

Control Complement

Touch Control System

Timer (0 - 99 minutes 99 sec.)

Microwave Power for Variable Cooking

 Repetition Rate;

100 PERCENT ........................................ Full power throughout the cooking time

90 PERCENT ........................................................... approx.  90% of Full Power
80 PERCENT ........................................................... approx.  80% of Full Power
70 PERCENT ........................................................... approx.  70% of Full Power
60 PERCENT ........................................................... approx.  60% of Full Power
50 PERCENT ........................................................... approx.  50% of Full Power
40 PERCENT ............................................................ approx. 40% of Full Power
30 PERCENT ............................................................ approx. 30% of Full Power
20 PERCENT ........................................................... approx.  20% of Full Power
10 PERCENT ............................................................ approx. 10% of Full Power

0 PERCENT ......................................... No power throughout the cooking time

Convection temperature control range:

   250˚C, 230˚C, 220˚C, 200˚C, 190˚C, 180˚C, 160˚C, 130˚C, 100˚C and 40˚C

SPEED GRILL key, LESS/MORE keys, SPEED CONVECTION key
NUMBER keys, HOLD key, OVEN (˚C) key, MICROWAVE key
MANUAL/REPEAT key, PAUSE key, STOP/CLEAR key
SET key, CHECK key, START key

Set Weight

Approx. 39.5 kg