Sharp R-8000E Service Manual Download Page 46 | Manualshive

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Summary of Contents for R-8000E

Page 1: ... q 7 SHARP SERVICE MANUAL f SHARP CONVECTION MICROWAVE OVW R OOOE In the interests of user safety the set should be restored to its original qdition and only parts identical to those specified used RATION ...

Page 2: ... personnel first study the entire text of GENERAL manual and then carefully study this book CAUTION 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 dev...

Page 3: ...ion 8 Description and Function of Components 14 Variable Cooking Control 14 MicrowaveTimer l 5 ConvectionTimer l 5 DoorOpenMechanism l 6 Upper and Lower Latch Switches 16 Monitor Switch United Kingdom and Australia models 16 Thermostat 17 Convection Cooking System 18 SheathHeater l 8 CHAPTER111 SERvIC G l 9 Troubleshooting Guide l9 OffCondition l 9 IdleConition l 9 Microwave Cooking Condition 20 C...

Page 4: ... MicrowaveTimer 2 8 Convection Lamp Heater Lamp Microwave Lamp 28 Cookswitch 2 8 Upper Latch Switch and Monitor Switch United Kingdom and Australia Removal 30 Lower Latch Switch Removal 30 Upper and Lower Latch Switches and Monitor Switch United Kingdom and Australia Adjustment 3 1 Door Replacement and Adjustment 32 MICROWAVE MEASUREMENT 33 SCHEMATIC DIAGRAM Continental Europe Model 34 PICTORIAL D...

Page 5: ...r 552mm 395mm including feet 500mm 340mm 255mm 36Ornr n 325mm Cook Switch 60 min Dual Speed Timer Microwave Timer 120min Single Speed Timer Convection Timer Variable Cooking Control Repetition Rate 25 FULL POWER HIGH I Full power through out the cooking time ROAST MEDIUM HIGH r 23 sec ON 7sec OFF approx 70 of full power SIMMER MEDIUM l Er 16 5 sec ON 13 5 sec OFF approx 50 of full power DEFROST ME...

Page 6: ...oking Temperature Heater Indicator Lamp Red Temperature Control for Convection Cooking Indicator Lamp for Microwave Cooking Green Variable Cooking Control 7 r FULL POWER HIGH A ROAST MEDIUM HIGH fr SIMMER MEDIUM A DEFROST MEDIUM LOW t liT WARM LOW I Timer for Microwave Cooking Cooking Start Button Door Open Button 5 ...

Page 7: ... is at 0 position 3 The oven will stop supplying the heater energy Push the Cooking Start button The convection lamp will glow to indicate the oven is in the convection cooking cycle and the turntable motor convection timer sheath heater and heater lamp will operate Note The heater lamp will light until the setting temperature reaches This heater lamp turns on and off repeatedly to hold the prehea...

Page 8: ... oscillate and produce a 2450 MHz cooking frequency 1 8 The RF energy produced by the magnetron tube is channeled through a waveguide and then into the oven cavity where the food is placed to be cooked 1 9 Upon completion of the selected cooking time the timer bell rings once And the timer contact are deactivated The oven reverts to the OFF condition Note On the Australia and United Kingdom models...

Page 9: ...oking time by turning the temperature control knob and convection timer When the Cooking Start button is pushed the following operations occur 1 The convection and heater lamps light 2 The fan motor oven lamps t urntable motor convec tion timer convection motor and sheath heater are energized 3 Upon completion of the selected cooking time the timer bell rings and the all contacts of the convection...

Page 10: ...LOSED CONVECTION 0 TURNTABLE 1IA A L ___ 1 r MICRO A nnwv2nlAiauc TllhRCD TIMER I II b A L I IIWL 4c CONTACTS MICROWAVE 3 LAMP 0 I TIMER 1 CONTACTS 0 THERMOSTAT THERM0 1 SWITCH 2 01JT VARI MOTOR I I 0 1 SURGE LIMITING RESISTOR SURGE LIMITING RELAY L POWER TRANSFORMER RECTIFIER VOLTAGE t MAGNETRON Figure 1 Oven Schematic off condition 9 ...

Page 11: ...RESISTOR Ty T LINE ACROSS CAPACITOR n MAGNETRON THERM0 CUT h LINE BYPASS 7 CAPACITOR OUT ZOM 1 INC OVEN LAMP TURNTABLE UPPER LATCH SWITCH I COOK CONVECTION 0 1 0 SWITCH THERMOSTAT MICROWAVE LAMP VARI MOTOR 0 LJ SURGE _ _ LIMITING RESISTOR SURGE LlMlTlhiG RELAY I POWER TRANSFORMER Figure 2 Oven Schematic Idle Condition Microwave 10 ...

Page 12: ...EN LAMP r l _ COM I TURNTABLE MOTOR MAGNETRON THERM0 CUT O UPPER CONVECTION LAMP I L I u l ________ I ____ ii MICRO MICROWAVE TIMER TIMER CONTACTS MICROWAVE 4 5 3 _____ mm VARI SWITCH SURGE __ LIMITING RESISTOR SURGE LIMITING RELAY SURGE LIMITING RELAY RECTIFIER CAPACITOR RECTIFIER POWER TRANSFORMER MAGNETRON Figure 3 Oven Schematic Idle Condition Convection Figure 3 Oven Schematic Idle Condition ...

Page 13: ... MICRO TIMER ON 3 VARIABLE COOKING CONTROL FULL POWER 4 COOK SWITCH ON SURGE LIMITING RELAY I _ RECTIFIER CAPACITOR MAGNETRON I FUSE 250V T6 3A LINE BYPASS A CAPACITOR MAGNETRON THERM0 CUT OUT UPPER LATCH SWITCH COOK SWITCH CONVEC I TIMER CONTACTS 0 THERMOSTAT THERM SWITCH 2 _ MICRO TIMER CONTACTS u 3 VARI SWITCH SURGE LIMITING RESISTOR POWER TRANSFORMER Figure 4 Oven Schematic Microwave Cooking C...

Page 14: ...NE ACROSS CAPACITOR BYPASS A CAPACITOR 7 FAN MOTOR hEE 5 OUT r I T 1 AT t TURNTABLE LPiIb SWITCH COOK I LAMP r 1 I SHEATH THERMOSTAT 0 HEATER 4 THERM0 SWITCH CONVECTION J Y 1MOTOR COM I HEATER 1 LAMP MICROWAVE LAMP MICROWAVE TIMER I VI VAR I MOTOR CONTACTS 3 7 SURGE LIMITING RELAY 1 1 VARI SWITCH r iii SURGE LIMITING RESISTOR POWER TRANSFORMER Figure 5 Oven Schematic Convection Cooking Condition 1...

Page 15: ... various modes The vari switch is operated ON by the cam lever and cam which are linked to the vari motor shaft If the variable cooking control is set at WARM DEFROST SIMMER or ROAST position 220 240 volts A C is supplied to Note The ON OFF time ratio does not correspond with the percentage of microwave power because approx 2 seconds are needed for heating of the magnetron filament _ ON 5 Seconds ...

Page 16: ...60 minutes the dial is marked off in 5 minute intervals United Kingdom Australia and South Africa Up to 10 minutes the dial is divided in 15 second inter vals From 10 minutes to 60 minutes the dial is marked off in 5 minute intervals The timer motor is energized through the cook switch upper latch switch convection timer contacts and microwave timer contacts 2 3 When the timer reaches the 0 point ...

Page 17: ... while the door is closed The switch is intended to render the oven inoperative by means of blowing the fuse when the contacts of the upper latch switch fail to open when the door is opened Functions 1 When the door is opened the monitor switch contacts close to the ON condition due to their being a normally closed At this time the upper latch switch is in the OFF condition contacts open due to it...

Page 18: ... in Figure 9 Setting temperature 9OOC to 25OOC Tembrature into o n kvity I I f I I 40 C 1 SHEATHHEATER and HEATER LAMP I ON I I I I Time I I I i I t I I I ONi jONi ON SHEATHHEATER CONVECTION MOiOR oFF oFF w oFF OWN OFF and HEATER LAMP Function of Thermostat This thermostat actuates their contacts by changing the pressure of oil filled in a capillary tube according to tempe rature rise Clockwise tu...

Page 19: ...culates inside the oven cavity to raise its temperature and at the same time comes into contact with the food begin cooked When the temperature inside the oven cavity reaches the preset temperature the sheath heater is deenergized When the temperature inside the oven cavity thereafter drops below the preset temperature the sheath heater is energized again In this way the inside of the oven cavity ...

Page 20: ...om service entrance Open wire in power cord or wire harness Blown fuse Check wall outlet Replace same or repair wiring Check for short circuit and replace fuse Fan motor does not operate Defective oven lamp Defective lower latch switch Open or loose wire connection to the above components Defective fan motor Open or loose wire connection Replace both oven Lamps Procedure 4 Check wiring Procedure C...

Page 21: ...owave timer Procedure H on GENERAL Check wiring Check wiring Check wiring Oven seems to be operating but little or no heat is produced in oven load Variable cooking control is set at FULL POWER position Defective vari switch Defective magnetron Defective rectifier Procedure 5 Procedure 1 Procedure M on GENERAL Oven operates normally when the variable cooking control is set at FULL POWER position b...

Page 22: ...contacts 0 B Open or loose wire connection Defective convection timer Open wiring in circuit to the convection timer Procedure H on GENERAL Check wiring Procedure H on GENERAL Check wiring Convection lamp lights but heating element does not heat with setting temperature at 90 C to 12OOC remperature in the oven cavity is lower or higher than preset temperature Procedure 8 Procedure 7 Check wiring P...

Page 23: ...E OBSERVED 3 UPPER LATCH SWITCH TEST The upper latch switch can be checked with an ohmmeter Isolate the switch and then connect the meter leads to the common COM and normally open NO terminals of ths switch The meter should indicate an open circuit with the door opened and a closed circuit with the door closed In case improper operation is indicated make a necessary switch adjustment or replace th...

Page 24: ...unted to the thermostat and turned on and off by temperature control knob and cam Disconnect the 6 pin connector from the main wire harness and Red wire leads from the thermostat terminal Connect the ohmmeter leads to the common COM and normally open NO terminals of the switch The meter should indicate an open circuit with set the temperature control knob at 40 C position and a closed circuit with...

Page 25: ...cavity face plate 4 Lift the entire case from the unit CAUTION DISCHARGE THE HIGH VOLTAGE CAPA CITqR BEFORE TOUCHING ANY OVEN COMPONENTS OR WIRING 1 Disconnect the oven power supply POWER TRANSFORMER REMOVAL 1 2 3 1 2 3 1 2 3 Disconnect the oven power supply and remove the outer case Discharge the high voltage capacitor Disconnect the wire leads of transformer from the magnetron and high voltage c...

Page 26: ...now free 7 Remove the four 4 screws holding the turntable motor to the mounting plate The motor is now free SURGE LIMITING RELAY REMOVAL Continental Europe only 1 Disconned the oven power supply and remove the outer cace 2 Discharge the high voltage capacitor 3 Remove the power transformer refer to Power Transformer Removal 4 Disconnect the wire leads from the relay 5 Remove the tow 2 screws holdi...

Page 27: ...ket to the thermal protection cover A Disconnect the wire leads from the convection motor 5 Remove the auxiliary fan and washer from the motor Remove the ten 10 screws from the lower and side shaft edge of the convection motor assembly 6 Remove the two 2 nuts holding the mounting bracket Take off the convection motor assemble slowly and to the motor release the tab which is mounted the therm0 lod ...

Page 28: ...n lamp socket mounting bracket Upper oven hinge eater insulator upper Convection motor Convection motor ermo cut out netron cooling duct B Turntable coupting Lower decorat Figure 13 Oven Cavity Components ...

Page 29: ...ER 1 Disconnect the wire leads from the timer 2 Take off the timer knob from the timer shaft 3 Remove the two 2 screws holding the mounting bracket to the back plate 4 Take off the timer cam A and B from the timer shaft COOK SWITCH 1 Disconnect the wire leads from the switch 2 Remove the two 2 screws holding the switch to the open device 5 Remove the three 3 screws holding the timer to 3 Remove th...

Page 30: ... open button 1 IW Cook button 1 knob J Microwave cook J indicator Y v A 7 Control panel frame assembly c Q i t 0b 0 Convection ti Thermostat mounting bracket Convection timer lever B Microwave timer Microwave timer mounting plate Control panel back plate Open device assembly I Figure 14 Control Panel and Components ...

Page 31: ... the switch from the upper latch hook push outward the two 2 retaining tabs holding the switch in place LOWER LATCH SWITCH REMOVAL 1 Disconnect the oven from the power supply and remove the outer case 2 Discharge the high voltage capacitor 3 Remove the complete control panel assembly referring to the Control Panel Assembly and Component Re moval 4 Disconnect the wire leads from the switches 5 Remo...

Page 32: ... operation If the upper latch switch has not activated with the door 5 closed loosen the single 1 screw holding the upper latch hook to the oven cavity front flange and adjust the upper latch hook position After the adjustment make sure of the following points 1 The in and out play of the door remains less than 0 5mm at latched position First check the upper latch hook position pushing and pulling...

Page 33: ... standards Refer to Microwave Measurement Procedure DOOR ADJUSTMENT When removing and or loosening hinge such as in the case of a door replacement the following adjustment criteria are taken Door is adjusted to meet the following three conditions by keeping screws of hinge loose 1 Adjust door latch heads at a positien where they smoothly catch the latch hooks through the latch openings Refer to up...

Page 34: ...t be used for testing 2 3 4 5 6 Recommended instruments are NARDA 8 100 NARDA 8200 HOLIDAY HI 1500 SIMPSON 38OM Place the turntable tray into the oven cavity Place the load of 275 f lSm1 of water with the addition of one 1 percent by weight of sodium chloride in solution initialy at 20 S C in the centre of the oven tray The water container should be a low form of 6OOml beaker with inside diameter ...

Page 35: ...0 QUICK CONNECT TERMINAL 0 SOLDER OR CLINCH TERMINAL 0 CONNECTOR Note Germany model have not C4 line accross capacitor R2 RESISTOF CAPACITOR WHTl1 I NHT l w3 OWEF ATCH WITCI NHTIl LK WHT 18 s iJ c 3A VHTll8 a A D1 I P NC uo I I RED l8 M FAN MOTOR TC MAGNETRON THERM0 CUT OUT 118 UPPER LATCH SWITCH T_SI C_OtjVEC TIMER T IHT Ls MICRO IND ORG ORG118 M4 VARI MOTOR ORG SWs VARI _____ SWITCH LIMITING INH...

Page 36: ...THERMOSTAT r IIr El BLU I TRANSFORMER 9 MAGNETRON Main chassis Figure 18 Pictorial Diagram Continental Europe Model ...

Page 37: ...LICON FIBER GLASS WIRE HV HIGH VOLTAGE WIRE 18 SECTIONAL AREA OF 0 8 mm2 NO INDICATION SHOWS 0 3 mm2 0 QUICK CONNECT TERMINAL 0 SOLDER OR CLINCH TERMINAL 0 CONNECTOR C LINE BYPAS CAPACITOR WHT l YHTll I w3 OWEF ATCH SWITCt NHTIl ILK F FUSE 250V Ml OA NHTI18 I TOR I yRED 18 TC MAGNETRON THERM0 CUT OUT I I H SHEATH HEATER I THERM0 R SWITCH D RECTIFER Figure 19 Schematic Diagram South Africa Model 36...

Page 38: ...2 I t c L 2 i5 c 1 i J rua m DIY0 ecu gz 0 ITl 2 37 ...

Page 39: ... VOLTAGE WIRE 18 SECTIONAL AREA OF 0 8 mm2 NO INDICATION SHOWS 0 3 mm2 0 QUICK CONNECT TERMINAL l SOLDER OR CLINCH TERMINAL 0 CONNECTOR RlHTll bW3 OWEF ATCH WITCI NHTIl F FUSE 250V Ml OA I I I I I VHi I I I TC MAGNETRON THERM0 CUT OI BRN H SHEATH HEATER SWITCH SWITCH ERM01 RED 18 NO M3 CONVEC FAN MOTOR NC RED R L HEATER IND ED I MG MAGNETRON l2 I D RECTIFE JT Figure 2 1 Schematic Diagram Australia...

Page 40: ...II I mII I I m I LAMP COM MONITOR TRANSFORMER A UPPER LATCH SWITCH COMW Control Panel Ass y r MAGNETRON RECTIFIER Main chassis Figure 22 Pictorial Diagram Australia Model ...

Page 41: ...mm2 NO INDICATION SHOWS 0 3 mm2 0 QUICK CONNECT TERMINAL l SOLDER OR CLINCH TERMINAL 0 CONNECTOR C LINE BYPAS CAPACITOR WHTll WHTIl SW3 LOWEF AT0 jWlTC WHT l ILK WHTll8 r lb RED118 C4 LINE ACROSS CAPACITOR I I WHTll8 1 8 Rz RESISTOR I C3 LINE BYPASS CAPACITOR I Ml FAN MOTOR I I TC MAGNETRON THERM0 CUT OUT M TIIRNTAR n n rnn cd NO N l 6 Y WHl lwHTHzsH lBRN FAN MOTOR L HEATER IND HT E WHT I I IWHTll...

Page 42: ...SWITCH Vori motor Ass y Ill I 1 w e I3 7 k Ill I WHT I I MAGNETRON THERM0 CUT OUT A I I CONVECTION MOTOR POWER TRANSFORMER I Control Panel Ass y I 1 I I MAGNETRON Jr Main chassis HIGH VOLTAGE CAPACITOR Figure 24 Pictorial Diagram United Kingdom Model ...

Page 43: ...PADPOl94WREO TURNTABLE F OPERATION MANUAL COOK BOOK A w 1I SSAKHQOO5YBEO POLYETHYLENE BAG mrl CONVECTION w MICROWAVE TURNTABLE STYLOFORM SPADP0252WREO PACKING CASE SPAKCI 283WREO Continental Europe Australia United Kingdom BAKING RACK South Africa ACCESSORIES FIXING METHOD ...

Page 44: ...REO QSW M0108WREO QSW MOlOSWREO RLMPTO021WREO QS LOO55WREO QSWTE0136WREO OSWTE0137WREO and South Africa Fuse holder Upper latch switch Lower latch switch Cook switch Oven lamp Oven lamp socket Convection timer Microwave timer RLMPEOlOlWREO Microwave lamp green RTUM 0026WREO Magnetron thenno cut out Co a ntinental Europe and United King RTUM 0017WREO Magnetron thenno cut out 1 Australia and South A...

Page 45: ...et Continental Europe Outer case cabinet United Kingdom Australia and South Africa Oven lamp access cover Continental Europe Oven lamp access cover United Kingdom Australia and South Africa Oven lamp cushion A Heat insulation tape Oven lamp cushion B Shading cushion A Shading cushion B Cord mounting bracket Continental Europe Cord mounting bracket United Kingdom Australia and South Africa Cord bus...

Page 46: ...ermostat wire protection tube FKNBK0109WRKO Water proof tape Cabinet cap Continental Europe Cabinet cushion United Kingdom Australia and South Africa Turntable motor supporting plate CONTROL PANEL PARTS Control panel frame assembly Continental Europe Control panel frame assembly United Kingdom and South Africa Control panel frame assembly Australia Panel plate Continental Europe Panel plate United...

Page 47: ... bracket 1 AF 4 17 FHNG 0066WRM0 Upper oven hinge 1 AE 4 18 FANGT0082WRYO Oven lamp glass flange 1 AM 4 19 LANGQ0289WRWO Oven lamp socket mounting bracket 1 AE 4 20 FANGK0115WRWO Damper mounting bracket 1 AH 4 21 FFTA 0002WRWO Damper cover 1 AG 4 22 MSPRD0043WREO Damper spring 1 AA 4 23 NSFTT0058WRMO Damper shaft 1 AA 4 24 PPACGOllOWRFO Damper packing 1 AK 4 25 FDUC 0154WRTA Convection fan duct 1 ...

Page 48: ...h spring 1 AC 5 7 FDoRF0131WRTO Door panel 1 BB 5 8 GCOVAOlOOWRFA Latch cover 1 AK 5 9 GWAKMOO26WRTA Door glass frame Continental Europe 1 AU GWAKMOO29WRTA Door glass frame 1 AU United Kingdom Australia and South Africa 5 10 HPNC OlOOWRTA Door screen 1 AW 5 11 PCoVP0242WRFA Choke cover 1 AT 5 12 PSLDMO274WREO Ferrite A 4 AC 5 13 PGLSPOO97WREO Inside door glass 1 AP 5 14 PGLSP0119WREA Outside door ...

Page 49: ...rowave cook book Continental Europe except Germany Microwave cook book Germany Microwave cook book United Kingdom and South Africa Microwave cook book Australia Convection menu guide Continental Europe except Germany Convection menu guide Germany Convection menu guide United Kingdom Convection menu guide Australia and South Africa Operation manual Continental Europe except Germany Operation manual...

Page 50: ...ion sash mtg Screw ferrite mtg Screw convection timer mtg Screw cook switch mtg Screw cam switch mtg Screw turntable coupling and thermostat mtg Screw fuse holder mtg Screw convection motor mtg Screw power transformer mtg Screw heater insulator lower mtg Screw waveguide cover right side mtg Screw door glass frame lower mtg Continental Europe Screw door glass frame lower mtg United Kingdom Australi...

Page 51: ...ring 4 Omm auxiliary fan mtg 1 Screw monitor switch lever mtg 1 United Kingdom and Australia Washer monitor switch lever United Kingdom and Australia AA AA AA AA AA AA AA AA AA AA AA see page 50 South Africa and Australia Models Modification Information Australia and South Africa Change of motor shaft The initial 1st lot Ser Nos 1OSXXXXX are mounted as illustrated in Figure A For the 2nd lot and o...

Page 52: ...CABINET PARTS ...

Page 53: ...L e J 52 F L z A a_ A _ 1 _ ...

Page 54: ...53 ...

Page 55: ...DOOR PARTS MISCELLANEOUS 0 6 3 Q 6 2 6 4 P I b fr SL_ jlwe 54 ...

Page 56: ...Q 6 5 0 6 l I I South Africa Continental Europe United Kingdom 0 6 12 Q 6 8 0 6 23 I Q 6 9 6 10 P n II t II 1 Q 0 6 13 Q 6 14 0 6 19 6 6 Q 6 21 I 0 6 15 ...

Page 57: ... the safety therefore it must be fixed correctly and firmly 1 The cord anchorage which is used to secure the mains supply cord can be futedin two different ways 2 If you fuc them as shown in Figure 2 the mains supply cord will not be secured firmly 3 Therefore make sure to fuc them as shown in figure 1 3 mm MAINS SUPPLY co D UPPER LSTPPOOO8YBFO Figure 1 Correct Fixing Figure 2 Wrong Fixing 56 s C ...

Page 58: ... 81 SHARP CORP 7N2 15E Printed in Japan ...

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