Sharp R-345M (serv.man2) Service Manual ▷ View online
R345M - 1
S30215R345M//
MICROWAVE OVEN
In interests of user-safety the oven should be restored to its original
condition and only parts identical to those specified should be used.
condition and only parts identical to those specified should be used.
SHARP CORPORATION
TABLE OF CONTENTS
Page
SERVICING ................................................................................................................................................. 2
APPEARANCE VEIW .................................................................................................................................. 3
CAUTION/WARNING/PRODUCT DESCRIPTION ...................................................................................... 4
OPERATION DATA ..................................................................................................................................... 5
OUTPUT POWER TEST PROCEDURE ..................................................................................................... 6
TEST PROCEDURES ................................................................................................................................. 7
TOUCH CONTROL PANEL ASSEMBLY .................................................................................................... 9
COMPONENT PLACEMENT AND ADJUSTMENT ................................................................................... 13
WIRING / RE-WIRING ............................................................................................................................... 14
SCHEMATIC DIAGRAM ............................................................................................................................ 15
CONTROL PANEL CIRCUIT DIAGRAM ................................................................................................... 16
PRINTED WIRING BOARD DIAGRAM ..................................................................................................... 17
PART LIST ................................................................................................................................................. 18
EXPLODED DIAGRAM OF OVEN PARTS ............................................................................................... 21
CONTROL PANEL/DOOR PARTS ............................................................................................................ 22
MISCELLANEOUS/PACKING & ACCESSORIES ..................................................................................... 23
APPEARANCE VEIW .................................................................................................................................. 3
CAUTION/WARNING/PRODUCT DESCRIPTION ...................................................................................... 4
OPERATION DATA ..................................................................................................................................... 5
OUTPUT POWER TEST PROCEDURE ..................................................................................................... 6
TEST PROCEDURES ................................................................................................................................. 7
TOUCH CONTROL PANEL ASSEMBLY .................................................................................................... 9
COMPONENT PLACEMENT AND ADJUSTMENT ................................................................................... 13
WIRING / RE-WIRING ............................................................................................................................... 14
SCHEMATIC DIAGRAM ............................................................................................................................ 15
CONTROL PANEL CIRCUIT DIAGRAM ................................................................................................... 16
PRINTED WIRING BOARD DIAGRAM ..................................................................................................... 17
PART LIST ................................................................................................................................................. 18
EXPLODED DIAGRAM OF OVEN PARTS ............................................................................................... 21
CONTROL PANEL/DOOR PARTS ............................................................................................................ 22
MISCELLANEOUS/PACKING & ACCESSORIES ..................................................................................... 23
MODEL
R-345(W)M
R-345(SL)M
R-345(SL)M
SERVICE MANUAL
®
R345M - 2
High voltage capacitor, High voltage transformer, Magnetron, High voltage rectifier assembly, High voltage
harness.
harness.
REMEMBER TO CHECK 3D
1) Disconnect the supply.
2) Door opened, and wedged open.
3) Discharge high voltage capacitor.
2) Door opened, and wedged open.
3) Discharge 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.
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.
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.
AFTER REPAIR REMEMBER TO CHECK 4R
1) Reconnect all leads removed from components during testing.
2) Replace the outer case (cabinet).
3) Reconnect the supply.
4) Run the oven. Check all functions.
2) Replace the outer case (cabinet).
3) Reconnect the supply.
4) Run 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.
and microwave leakage test carried out.
IMPORTANT: If the oven becomes inoperative because of a blown fuse F8A in the 1st latch switch - monitor switch
circuit, check the 1st latch switch and monitor switch before replacing the fuse F8A.
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:-
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.
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).
WARNING TO SERVICE PERSONNEL
Microwave ovens contain circuitry capable of producing very high voltage and current. Contact with following parts
will result in electrocution:-
will result in electrocution:-
SERVICING
R345M - 3
APPEARANCE VEIW
Air vent openings
Outer cabinet
Power supply cord
Door opening button
Oven lamp
Waveguide cover
(distributing microwaves)
(distributing microwaves)
Oven cavity
Door Latches
Turntable support system
Door seals
& sealing surfaces
Control panel
(shown below
for detail)
(shown below
for detail)
Turntable
Turntable
support
support
Coupling
CONTROL PANEL
OVEN
1
2
3
4
5
6
1. Place the turntable support in the centre of
the oven floor so that it can freely rotate around the
coupling.
coupling.
2. Place the turntable onto the turntable support so that it
locates firmly into the coupling.
1.
Digital Display
2.
AUTO COOK/DEFROST key
press to select 1 of 6 AUTO COOK or 2
AUTO DEFROST programmes.
press to select 1 of 6 AUTO COOK or 2
AUTO DEFROST programmes.
3.
POWER LEVEL/WEIGHT key.
4.
STOP/CLEAR key.
5.
START/AUTO MINUTE key.
6.
TIME keys.
R345M - 4
WARNING
Servicing and repair work must be carried out only by
trained service engineers.
trained service engineers.
The parts marked '*' on the parts list and schematic
diagram have voltages in excess of 250V.
diagram have voltages in excess of 250V.
Removal of the outer wrap gives access to potential
above 250V.
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.
microwave exposure, by themselves, or when they are
damaged, loosened or removed.
CAUTION
MICROWAVE RADIATION
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.
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.
WARNING
THIS APPLIANCE MUST BE EARTHED
. THE WIRES IN THIS MAINS LEAD ARE COLOURED IN
ACCORDANCE WITH THE FOLLOWING CODE:
GREEN-AND-YELLOW : EARTH BLUE : NEUTRAL BROWN : LIVE
GREEN-AND-YELLOW : EARTH BLUE : NEUTRAL BROWN : LIVE
If the mains lead is replaced, only part number QACCBA010URE0 should be used
SPECIFICATION
Power Requirements
230 -240 Volts 50 Hertz Single phase, 3 wire earthed
Power Consumption
1.3kW
Power Output
900 watts nominal of RF microwave energy
Operating frequency of 2450 MHz
Operating frequency of 2450 MHz
Case Dimensions
Width 520 mm Height 305 mm including foot Depth 422 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:
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
AUTO COOK/DEFROST key
press to select 1 of 6 AUTO COOK or 2
AUTO DEFROST programmes.
POWER LEVEL/WEIGHT key.
STOP/CLEAR key.
START/AUTO MINUTE key.
TIME keys.
press to select 1 of 6 AUTO COOK or 2
AUTO DEFROST programmes.
POWER LEVEL/WEIGHT key.
STOP/CLEAR key.
START/AUTO MINUTE key.
TIME keys.
Net Weight
Approx. 15.5 kg
PRODUCT DESCRIPTION
CAUTION / WARNING
As part of our policy of continuous improvement, we reserve the
right to alter design and specifications without notice
right to alter design and specifications without notice
