R-1900M. Complete - Sharp Home Appliance Service Manual (repair manual)

r-1900m service manual
Model
R-1900M
Pages
50
Size
3.19 MB
Type
PDF
Document
Service Manual
Brand
Device
Home Appliance / Microwave Oven / Complete
File
r-1900m.pdf
Date

Read Sharp R-1900M Service Manual online

R1900M
1 – 1
R1900M
Service Manual
 
CHAPTER 1. 
BEFORE SERVICING
GENERAL IMPORTANT INFORMATION
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 ser-
vice.   
WARNING MICROWAVE RADIATION
Personnel 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.
WARNING
Never operate the oven until the following points are ensured.
(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.
Never operate the Grill and/ or Convection heater with the oven outer cabinet removed. (Because air flow is eliminated,
and the excess heat generated on adjacent components). It can cause permanent damage or a fire.
WARNING: THIS APPLIANCE MUST BE EARTHED
  IMPORTANT
THE WIRES IN THIS MAINS LEAD ARE COLOURED IN ACCORDANCE WITH THE FOLLOWING CODE:
 GREEN-AND-YELLOW--------------EARTH
 BLUE---------------------------------NEUTRAL
 BROWN-------------------------------------LIVE
R1900M
2 – 1
R1900M
Service Manual
 
CHAPTER 2. 
WARNING TO SERVICE PERSONNEL
Microwave ovens contain circuitry capable of producing very high voltage and current, contact with any part of the high voltage circuit will result in
electrocution. High voltage capacitor, Power transformer, Magnetron, High voltage rectifier assembly, High voltage fuse, High voltage harness.
REMEMBER TO CHECK 3D
1) Disconnect the supply.
2) Door opened, and wedged open.
3) Discharge the high voltage capacitor.
WARNING: AGAINST THE CHARGE OF THE HIGH VOLTAGE
CAPACITOR
The high voltage capacitor remains charged about 60 sec-
onds after the oven has been switched off. Wait for 60 sec-
onds 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 pri-
mary of the power transformer. Ensure that these leads remain iso-
lated 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 transformer.
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.
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
(100%). 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.
R1900M
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R1900M
Service Manual
 
CHAPTER 3. 
PRODUCT DESCRIPTION
[1] SPECIFICATIONS
[2] APPEARANCE VIEW
1. OVEN
1. Touch control panels
2. Door latch openings
3. Ceramic shelf
4. Oven light
5. Air intake openings
6. Air intake ?lter
7. Door seals and sealing surfaces
8. Door hinges
9. Oven door with see-through window
10. Door latches
11. Door handle
12. Service window for replacing the oven light bulb
13. Ventilation openings
14. Power supply cord
15. Mounting plate
16. Screw for mounting plate
17. Splash cover
ITEM
DESCRIPTION
Power Requirements
Single phase 230 - 240V, 50Hz, 3 wire earthed
Power Consumption
2.8kW / Approx. 12.3A
Power Output
1900W Operating frequency 2450 MHz
Outside Dimensions
445mm (W) x 573mm (D) x 346mm (H) (including feet)
Cooking Cavity Dimensions
356mm (W) x 326mm (D) x 177mm (H)
Control Complement
Touch Control System
Digital Display
Ten number Pads
STOP/CLEAR pad
CUSTOM SETTING pad
START pad
POWER LEVEL pad (Power level: 0 to 100%)
MANUAL/ REPEAT pad
DOUBLE/ TRIPLE QUANTITY pad
EXPRESS DEFROST pad
SET MEMORY pad
Weight
Approx. 33.5 kg
13
16
12
14
15
7
6
1
1
2
8
9
10
4
3
17
11
5
R1900M
3 – 2
2. TOUCH CONTROL PANEL
[3] INSTALLATION INFORMATION
When this commercial microwave oven is installed near other commercial electrical appliances, connect a lead wire to each equivalent potential ter-
minal 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.
Figure A-1
1
2
3 4
5 6
7
8
9
5
6
ON DEF. NO.
CHECK LOCK FILTER
1. MANUAL/REPEAT pad
2. POWER LEVEL pad
3. DOUBLE/TRIPLE QUANTITY pad
4. CUSTOM SETTING pad
5. STOP/CLEAR pad
6. START pad
7. Ten number pads
8. EXPRESS DEFROST pad
9. SET MEMORY pad
DOOR SIDE
COMMERCIAL MICROWAVE OVEN
OTHER COMMERCIAL
ELECTRICAL APPLIANCE
Lead wire
Equipotential marking
Earth angle
(Equivalent potential terminal)
Equivalent
potential terminal
Screw
Washer
Lead wire
Page of 50
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Download Sharp R-1900M Service Manual (Repair Manual)

Here you can read online and download Sharp R-1900M Service Manual in PDF. R-1900M service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sharp R-1900M Microwave Oven. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.