R-32STM. (with corrections to door panel Parts 5 5 04) - Sharp Home Appliance Service Manual (repair manual)

R32STM - 1

S9945R32STM//

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

Page

SERVICING ................................................................................................................................................. 2
CAUTION / WARNING ................................................................................................................................ 3
PRODUCT DESCRIPTION .......................................................................................................................... 3
APPEARNACE VIEW....................................................................................................................................4
OPERATION DATA ..................................................................................................................................... 5
WIRING / RE-WIRING ................................................................................................................................. 6
TEST PROCEDURES ................................................................................................................................. 7
TOUCH CONTROL PANEL ASSEMBLY .................................................................................................. 10
COMPONENT PLACEMENT AND ADJUSTMENT ................................................................................... 15
SCHEMATIC DIAGRAM ............................................................................................................................ 17
WIRING DIAGRAM .................................................................................................................................... 18
PART LIST ................................................................................................................................................. 21
EXPLODED ILLUSTRATION ..................................................................................................................... 23
MISCELLANEOUS/PACKING AND ACCESSORIES ................................................................................ 25

MICRO

Lbs Kg Oz AUTO

COOK

%

R32STM - 2

High voltage capacitor, High voltage transformer, Magnetron, High voltage rectifier assembly, High voltage
harness.

1)

isconnect the supply.

2)

oor opened, and wedged open.

3)

ischarge high voltage capacitor.

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 using a screwdriver with an insulated handle.

Microwave ovens should not be used without a load.   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 microwave timer for one (1) minute, set the
power level to HIGH (100%) and push the start key. When the one (1) minute has elapsed (timer at zero) carefully check
that the water is now hot.

1)

econnect all leads removed from components during testing.

2)

eplace the outer case (cabinet).

3)

econnect the supply.

4)

un the oven. Check all functions.

When all service work is completed, and the oven is fully assembled, the microwave power output should be checked
and microwave leakage test carried out.

IMPORTANT:

If the oven becomes inoperative because of a blown fuse F1 in the 1st latch switch - monitor switch
circuit, check the 1st latch switch and monitor switch before replacing the fuse F1.

Sharp recommend that wherever possible, fault-finding is carried out with the supply disconnected.  In some
cases, it may be necessary to connect the supply with  the cover removed to carry out fault investigation in the
control circuitry.  In such cases, the high voltage circuit should be disabled as described below to reduce the
hazards:-

•

Carry out 3D checks (see above).

•

Disconnect the supply leads from the high voltage transformer, making a note of the polarity.  Insulate the
connectors, ensuring they are positioned away from the transformer and fastened there.

•

Connect any relevant test equipment e.g. voltmeter.

•

Reconnect the oven to the supply, then close the door.

•

Note the results of the test, taking care to keep clear of the operational oven.

•

Carry out 3D checks (see above).

•

Reconnect the leads to the transformer.  Take care to observe correct polarity.

•

Carry out 4R checks (see below).

Microwave ovens contain circuitry capable of producing very high voltage and current. Contact with following parts
will result in electrocution:-

R32STM - 3

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

The parts marked '*' on the parts list and schematic
diagram have voltages in excess of 250V.

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

All the parts marked "

∆

" on the parts list may cause undue

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

Do not become exposed to radiation from the
magnetron or other parts conducting microwave
energy.  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.

THE WIRES IN THIS MAINS LEAD ARE COLOURED IN

ACCORDANCE WITH THE FOLLOWING CODE:
GREEN-AND-YELLOW : EARTH        BLUE : NEUTRAL        BROWN : LIVE

If the mains lead is replaced, only part number QACCBA032WRE3 should be used

Power Requirements

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

Power Consumption

1.45kW

Power Output

900  watts nominal of RF microwave energy
(measured by way of IEC 705)
Operating frequency of 2450 MHz

Case Dimensions

Width 520 mm     Height 305 mm including foot     Depth 413 mm

Cooking Cavity Dimensions

Width 342 mm     Height 207 mm     Depth 368 mm

Turntable diameter

325 mm

Control Complement

Simple Touch Control System
Clock (1.00 - 12.59 or 0.00 - 23.59)
Microwave Power for Variable Cooking
Repetition Rate:

HIGH

 Full power throughout the cooking time

MEDIUM HIGH

 approx. 70% of FULL Power

MEDIUM

 approx. 50% of FULL Power

MEDIUM LOW

 approx. 30% of FULL Power

LOW

 approx. 10% of FULL Power

START/AUTO MINUTE pad

AUTO DEFROST pad

POWER LEVEL  pad

MORE/LESS pads

STOP/CLEAR pad

INSTANT COOK pads

TIME pads

LESS/MORE pads

WEIGHT pads

TIMER pad

Set Weight

Approx. 17 kg

AUTO START/CLOCK pad

 

  

R32STM - 4

MICRO

Lbs Kg Oz AUTO

COOK

%

10

11

12

8

9

6

5

7

4

3

2

1

12

13

14

1.

2.      

 keys

3.

 keys

4.

 key

press to select 1 of 5 AUTO
COOK or 1 of 5 AUTO
DEFROST programmes.

5.

 keys

6.

 key

7.

 key

8.

 key

9.

 key

10.

 key

11.

L key

12.

 keys

1. Placed the roller stay on the floor of the oven
    cavity, engaging shaft into turntable motor shaft.
2. Then place the turntable on roller stay.

1.   Control panel
2.   Oven lamp
3.   Door open button
4.   Waveguide cover
5.   Coupling
6.   Oven cavity
7.   Door seals and sealing surfaces
8.   Door latchs
9.   Ventilation openings
10  Outer cabinet
11. Power supply cord
12. Turntable
13  Roller stay
14. Coupling