R-8000GK — Sharp Home Appliance Service Manual (repair manual)

Model
R-8000GK
Pages
44
Size
1.16 MB
Type
PDF
Document
Service Manual
Brand
Device
Home Appliance / Microwave Oven
File
r-8000gk.pdf
Date

View Sharp R-8000GK Service Manual online

R-8000GK
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.
TABLE OF CONTENTS
COMMERCIAL
HIGH SPEED CONVECTION
MICROWAVE OVEN
R-8000GK
S1403R8000GPK
MODEL
                      SERVICE MANUAL
SHARP CORPORATION
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
R-8000GK
SERVICING
 REMEMBER TO CHECK 3D
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.
 REMEMBER TO CHECK 4R
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.
WARNING TO SERVICE PERSONNEL
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.
R-8000GK
1
SERVICE MANUAL
SHARP CORPORATION
OSAKA, JAPAN
COMMERCIAL
HIGH SPEED CONVECTION
MICROWAVE OVEN
R-8000GK
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 service.
CAUTION
MICROWAVE RADIATION
DO NOT BECOME EXPOSED TO RADIATION FROM
THE MICROWAVE GENERATOR OR OTHER PARTS
CONDUCTING MICROWAVE ENERGY.
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.
WARNING
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
R-8000GK
2
GENERAL INFORMATION
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
PRODUCT DESCRIPTION
SPECIFICATION
ITEM
DESCRIPTION
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
NOTE: Internal capacity is calculated by measuring
maximum width, depth and height.
Actual capacity for holding food is less.
R-8000GK
3
APPEARANCE VIEW
OVEN
DEGITAL DISPLAY INDICATORS:
1. Indicators
   : SPEED
CONVECTION
MICRO
MORE(   )/LESS(   )
CHECK
PAUSE
150˚C
: HOLD 150
°C
COOK
OPERATING KEYS:
2. SPEED GRILL
Press to select speed grill mode.
3. SPEED CONVECTION
Press to select speed convection mode.
4. MORE(   )/LESS(   )
Press to set more or less mode.
1. Control panel
2. Waveguide cover
3. Oven lamp
4. Oven cavity
5. Coupling
6. Door latches
7. Door opening handle
(To open the door, pull the handle down
and forward. Never hold the door handle
when moving the oven.)
8. Door seals and sealing surfaces
9. Ventilation cover
10. Outer cabinet
11. SET
Press to select the oven sound and set
or clear memory programmes.
Press to change the holding time of
HOLD 150
°C.
12. CHECK
Press to check memory banks.
13. START
Press to start oven after setting
programmes.
Press to extend the cooking time by 1
minute multiples using the last
sequence after the cooking.
14. STOP/CLEAR
Press to clear during programming.
Press once to stop operation of oven
during cooking, press twice to cancel
cooking programme.
CONTROL PANEL
15. Turntable support
16. Low rack
17. High rack
18. Splash guard
12
13
9
10
11
12
16
17
18
14
15
6
8
7
3
5
1
2
3
4
2
3
4
1
7
8
10
11
9
12
13
14
6
5
11. Power cord
12. Air-vent openings
13. Oven lamp access cover
14. Turntable
5. NUMBER
Press to select memory number.
Press to enter cooking time.
6. HOLD 150
°C
Press to set or cancel HOLD150
°C
mode.
7. OVEN (
°C)
Press to select convection temperature.
8. MICROWAVE
Press to select microwave power
setting.
9. MANUAL/REPEAT
Press to set manual cooking or select
the repeat cooking mode.
10. PAUSE
Press to set a pause when setting a
sequence programme.
INSTALLATION INFORMATION
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
(Equivalent potential terminal)
Equivalent 
potential terminal
Screw
Washer
Lead wire

Download Sharp R-8000GK Service Manual (Repair Manual)

Here you can view online or download Sharp R-8000GK Service Manual in pdf. This Service Manual can help you recover, restore, fix, disassemble and repair Sharp R-8000GK Microwave Oven. Information contained in Sharp R-8000GK service manual (repair manual) typically includes:

  • Disassembly, troubleshooting, programming, maintenance, remote, adjustment, installation and setup instructions.
  • Schematics, wiring and block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Parts list (bill of materials).