Sharp R-64ST Service Manual Download Page 33

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R-64ST - 33

Figure O-3 Oven Schematic-Grill Cooking Condition

Figure O-4 Oven Schematic-Dual Cooking Condition

SCHEMATIC DIAGRAMS

SCHEMATIC

NOTE: CONDITION OF OVEN

1. DOOR CLOSED.

2. COOKING TIME PROGRAMMED.

3. GRILL KEY TOUCHED.

3. START KEY TOUCHED.

Note:
AC CORD CONNECTION
BRN : BROWN
BLU : BLUE
G-Y : GREEN AND YELLOW STRIPE
/18 : SECTIONAL AREA OF 1 .5mm

MIN.

Indicates components with potential
above 250 V.

SCHEMATIC

NOTE: CONDITION OF OVEN

1. DOOR CLOSED.

2. COOKING TIME PROGRAMMED.

3. COMBI GRILL KEY TOUCHED.

3. START KEY TOUCHED.

Note:
AC CORD CONNECTION
BRN : BROWN
BLU : BLUE
G-Y : GREEN AND YELLOW STRIPE
/18 : SECTIONAL AREA OF 1 .5mm

MIN.

Indicates components with potential
above 250 V.

VEN

THERMOST

BLU / 18

BRN / 18

230V ~ 50Hz

G-Y / 18

EARTH

LINE CROSS CAPACITOR

0.22

/ AC250V

FUSE

20A

NOISE SUPPRESSION COIL

RESISTOR 680 k

NOISE

FILTER

UNIT

RESISTOR 10M

LINE PYPASS

CAPACITOR

0.0047

/ AC250V

LINE PYPASS

CAPACITOR

0.0047

/ AC250V

FUSE

F8A

MONITORED

LATCH

SWITCH

SW1

RECTIFIER

CAPACITOR

0.97

AC2100V

MAGNETRON

POWER

TRANSFORMER

MONITOR

SWITCH

SW2

HEATER

TURNTABLE MOTOR

FAN MOTOR

OVEN LAMP

CONTROL UNIT

STOP

SWITCH

SW3

RY2

RY1

COM

TTM

RY3

HVT THERMOSTAT

VEN

THERMOST

BLU / 18

BRN / 18

230V ~ 50Hz

G-Y / 18

EARTH

LINE CROSS CAPACITOR

0.22

/ AC250V

FUSE

20A

NOISE SUPPRESSION COIL

RESISTOR 680 k

NOISE

FILTER

UNIT

RESISTOR 10M

LINE PYPASS

CAPACITOR

0.0047

/ AC250V

LINE PYPASS

CAPACITOR

0.0047

/ AC250V

FUSE

F8A

MONITORED

LATCH

SWITCH

SW1

RECTIFIER

CAPACITOR

0.97

AC2100V

MAGNETRON

POWER

TRANSFORMER

MONITOR

SWITCH

SW2

HEATER

TURNTABLE MOTOR

FAN MOTOR

OVEN LAMP

CONTROL UNIT

STOP

SWITCH

SW3

RY2

RY1

COM

TTM

RY3

HVT THERMOSTAT

R64ST_S.MANUAL

12/8/01, 11:01 am

Summary of Contents for R-64ST

Page 1: ... REWIRING 31 SCHEMATIC DIAGRAMS 32 PICTORIAL DIAGRAM 34 CONTROL PANEL CIRCUIT DIAGRAM 35 SWITCH UNIT CIRCUIT DIAGRAM 36 PRINTED WIRING BOARD DIAGRAM 37 PRINTED WIRING BOARD OF SWITCH UNIT DIAGRAM 38 PARTS LIST 39 EXPLODED DIAGRAM OF OVEN PARTS 42 CONTROL PANEL DOOR PARTS 43 MISCELLANEOUS PACKING ACCESSORIES 44 S71103R64EHW MICROWAVE OVEN AND GRILL MODEL R 64ST In interests of user safety the oven ...

Page 2: ...os se kytketään väärin Kaikkien mikroaaltoliitäntöjen sekä syöttö että ulostulopuolella aaltoputkien laippojen ja tiivisteiden tulee olla varmistettuja Mikroaaltouunia ei koskaan saa käyttää ilman kuormaa jossa mikroaaltoenergiaa kuluu Avoimeen aaltoputkeen tai antenniin ei koskaan saa katsoa virran ollessa kytkettynä ADVARSEL MIKRØBOLGESTRÅLING Personell må ikke utsettes for mikrobølge energi som...

Page 3: ...his 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 WARNING Never operate the oven until the following points are ensured A The door is tightly closed B The door latches and hinges are not d...

Page 4: ... 60 seconden voordat u de verbinding van de hoogspannings condensator m a w de verbindingsdraad van de hoogspanningsgelijkrichter met een geïsoleerde schroevedraaier kortsluit tegen het chassis Sharp beveelt ten sterkste aan dat voor zover mogelijk defecten worden opgespoord wanneer de stekker uit het stopcontact is gehaald Soms is het nodig om de stroomtoevoer weer tot stand te brengen nadat de b...

Page 5: ...fugas de microondas KOM IHÅG ATT KONTROLLERA 3 STEG 1 Koppla från strömkällan 2 Öppna dörren på glänt 3 Ladda ur högspänningskondensatorn Sharp rekommenderar att felsökning sker med strömmen fränkopplad Ibland kan det var nödvändigt att koppla på strömmen efter det att höljet avlägsnats utför da 3 Steg kontrollen och koppla sedan från ledarna till transformatorns primärsida Se till att ledarna är ...

Page 6: ...nzioni I forni a microonde non devono mai funzionare a vuoto Per verificare la presenza di energia da microonde all interno di una cavitá mettere una tazza di acqua fredda sul piatto rotante del forno chiudere la porta regolare la potenza su HIGH ed impostate il temporizzatore su due 2 minuti Trascorsi i due minuti temporizzatore a zero controllare accuratamente che ora l acqua sia calda Se l acqu...

Page 7: ...69mm Cooking Cavity Dimensions Width 290 mm Height 194 mm Depth 313 mm Turntable diameter 272 mm Control Complement Jog Touch Control System 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 EXPRESS DEFROST Button EXPRESS C...

Page 8: ...r supply cord 1 Digital Display 2 Symbols and Indicators 3 EXPRESS DEFROST button 4 EXPRESS COOK button 5 STOP button 6 1 min START button 7 COOKING MODE button 8 TIMER WEIGHT POWER knob APPEARANCE VIEW CONTROL PANEL 5 6 4 3 2 1 1 Place the roller stay on the floor of the oven cavity engaging shaft into turntable motor shaft 2 Then place the turntable on roller stay 7 3 4 1 10 7 6 2 9 8 11 5 12 13...

Page 9: ...owave oven is plugged in a wall outlet 230V 50Hz the line voltage is supplied to the point A1 A3 in the control unit Figure O 1 on page 32 1 The display flashes 88 88 2 Tosetanyprogrammesorsettheclock youmustfirst touch the STOP pad 3 appears in display NOTE When the oven door is opened the oven lamp comes on at this time MICROWAVE COOKING CONDITION HIGH COOKING Enter a desired cooking time by tur...

Page 10: ... oven against the over heat during grill cooking or combi grill cooking If the temperature rises above 150 C because the fan motor is interrupted the air inlet duct is blocked or the ventilation openings are obstructed the thermal cut out opens and switches off the all electrical parts The defective thermal cut out re makes the contact by cooling down FUNCTION OF IMPORTANT COMPONENTS down to zero ...

Page 11: ...elec trical parts do not operate Oven goes into cook cycle but shuts down before end of cooking cycle Oven seems to be operating but little or no heat is produced in oven load Microwave power control is set at HIGH Oven does not seem to be operating properly during variable cooking con dition Oven operates properly at HIGH Grill heating element does not heat Oven seems to be operating Fuse F8A blo...

Page 12: ...RANSFORMER TOUCH CONTROL PANEL BLOCKED VENTILATION OPENINGS WRONG OPERATION MIS ADJUSTMENT OF SWITCHES HOME FUSE OR BREAKER NO POWER AT WALL OUTLET BLOCKED COOLING FAN RELAY RY1 2 3 FOIL PATTERN M TROUBLESHOOTING GUIDE N R64ST_S MANUAL 12 8 01 11 01 am 12 ...

Page 13: ...RCUIT WITH YOUR HAND OR AN INSULATED TOOL WHILE THE OVEN IS IN OPERATION The formula is as follows P x t 4 187 V x T P W 4 187 x V x T t Our condition for water load is as follows Room temperature around 20 C Power supply Voltage Rated voltage Water load 1000 g Initial temperature 10 2 C Heating time 52 3 55 sec P 80 x T Measuring condition 1 Container The water container must be a cylindrical bor...

Page 14: ...aulty and should be replaced CARRY OUT 4R CHECKS Initial temperature T1 11 C Temperature after 52 3 55 sec T2 21 C Temperature difference Cold Warm T1 10C Measured output power The equation is P 80 x T P 80 x 10 C 800 Watts JUDGMENT The measured output power should be at least 15 of the rated output power CAUTION 1 C CORRESPONDS TO 75 WATTS REPEAT MEASUREMENT IF THE POWER IS INSUFFICIENT 1000g 100...

Page 15: ...Ω after it has been charged D A short circuited capacitor shows continuity all the time E An open capacitor constantly shows a resistance about 10 MΩ because of its internal 10MΩ resistance F When the internal wire is opened in the high voltage capacitor shows an infinite resistance G The resistance across all the terminals and the chassis must be infinite when the capacitor is normal If incorrect...

Page 16: ...om the motor Using an ohmmeter check the resistance between the two terminals as described in the table below H NOISE FILTER TEST CARRY OUT 3D CHECKS Disconnect the leads from the terminals of noise filter Using an ohmmeter check between the ter minals as described in the following table MEASURING POINTS INDICATION OF OHMMETER Between N and L Approx 680 kΩ Between terminal N and WHITE Short circui...

Page 17: ...name Resistance Grill heating element Approximately 25 6 Ω x 2 51 2 Ω J GRILL HEATING ELEMENT TEST CARRY OUT 3D CHECKS Before carrying out the following tests make sure the heating element is cool completely 1 Resistance of heating element Disconnect the wire leads to the heating element to be tested Using ohmmeter with low resistance range Check the resistance across the terminals of the heating ...

Page 18: ...it lead wire harness connection before replacement The following symptoms indicate a defective switch unit Replace the switch unit a When touching the keys a certain key produces no signal at all b When touching a key two figures or more are displayed c When touching the keys sometimes a key produces no signal 2 Control Unit The following symptoms indicate a defective control unit Before replacing...

Page 19: ...replaced If a specific key does not respond the above method may be used after clearing the display to determine if the display unit or main board is at fault M SWITCH UNIT TEST 1 2 3 4 SW2 5 6 SW3 SW4 SW5 SW6 SW7 CN G SW1 Remove the outer case and check voltage between Pin No 1 and Pin No 3 of the 3 pin connector A on the control unit with an A C voltmeter The meter should indicate rated voltage ...

Page 20: ...C voltage is present at primary Low voltage transformer or secondary circuit defective side of low voltage transformer Check and repair 3 Only pattern at a is broken Insert jumper wire J1 and solder CARRY OUT 3D CHECKS BEFORE REPAIR 4 Pattern at a and b are broken Insert the coil RCILF2003YAZZ between c and d CARRY OUT 3D CHECKS BEFORE REPAIR NOTE At the time of these repairs make a visual inspect...

Page 21: ...I into the pulse signal and the pulse signal is returned to the LSI 10 Back Light Circuit A circuit to drive the back light Light emitting diodes LED1 LED4 The touch control section consists of the following units 1 Switch Unit 2 Control Unit The principal functions of these units and the signals communicated among them are explained below Switch Unit The switch unit is composed of a matrix signal...

Page 22: ... operation is applied to set up its function 16 TEST IN Connected to VC 17 RESET IN Auto clear terminal Signal is input to reset the LSI to the initial state when power is supplied Temporarily set to L level the moment power is supplied at this time the LSI is reset Thereafter set at H level 18 HOLD IN OUT Connected to VDD 19 INT2 IN Signal synchronized with commercial power source frequency This ...

Page 23: ... and R61 will be input into R51 When no tact switch is touched the signal is held at H level 33 R52 IN Signal coming from tact switch When either of tact switches SW3 and SW6 is touched a corresponding signal out of R60 and R61 will be input into R52 When no tact switch is touched the signal is held at H level 34 R53 IN Signal coming from tact switch When either of tact switches SW4 and SW7 is tou...

Page 24: ...t or output terminals 4 Attach connectors electrolytic capacitors etc to PWB making sure that all connections are tight 5 Be sure to use specified components where high precision is required E C B Transistor 2SB1238 Transistor DTA123ES KRA101M KRA223M KRC243M E C B 1 Precautions for Handling Electronic Components This unit uses CMOS LSI in the integral part of the circuits When handling these part...

Page 25: ...ease the capacitor holder from the base plate 6 Now the high voltage rectifier should be free 7 Remove the capacitor from the capacitor holder 8 Now the capacitor should be free CAUTION WHEN REPLACING HIGH VOLTAGE RECTIFIER ENSURE THAT THE CATHODE EARTH CONNECTION IS SECURELY FIXED TO THE CAPACI TOR HOLDER AND BASE PLATE WITH AN EARTHING SCREW HIGH VOLTAGE TRANSFORMER REMOVAL 1 CARRY OUT 3D CHECKS...

Page 26: ... metal pieces may be produced Do not let the pliers touch the coil of the fan motor because the coil may be cut or dam aged Do not distort the bracket by touching with the pliers 2 Remove the fan blade from the shaft of the fan motor by pulling and rotating the fan blade with your hand 3 Now the fan blade will be free CAUTION Do not use this removed fan blade again Because the hole for shaft of it...

Page 27: ...the cutting pliers 2 Re install the turntable motor to the oven cavity with the one 1 screw 3 Re connect the wire leads to the turntable motor 4 Insert the tab of the turntable motor cover into the hole of the base plate as shown in Figure C 4 b 6 Re install the turntable motor cover to the base plate with a LX CZA001URE0 screw Screw Cutting pliers Bridges Bridges Turntable motor cover Screw Turnt...

Page 28: ...D CHECKS 2 Disconnect the wire leads to the grill heating elements 3 Remove the one 1 screw holding the exhaust duct to the oven cavity 4 Push the two tabs holding the reflector to the oven cavity 5 Release the reflector from the oven cavity by sliding it 6 Now the grill heating element assembly is free 7 Remove the grill heater angle from the reflector 8 Remove the two 2 screws holding the short ...

Page 29: ... 6 Put sealer film on door panel Refer to Inner Sealer Film and figure C 6 on how to handle the new film 7 Catchtwo 2 pinsofdoorpanelontwo 2 holeofupper and lower oven hinges 8 Re install choke cover to door panel by pushing Note After any service to the door A Makesurethatmonitoredlatchswitch stopswitch and monitor switch are operating properly Refer to chapter Test Procedures B An approved micro...

Page 30: ...ovens must be used for testing Recommended instruments are NARDA 8100 NARDA 8200 HOLADAY HI 1500 SIMPSON 380M 2 Place the oven tray into the oven cavity 3 Place the load of 275 15ml of water initially at 20 5 Cinthecenteroftheoventray Thewatercontainer should be a low form of 600 ml beaker with inside diameter of approx 8 5cm and made of an electri cally non conductive material such as glass or pl...

Page 31: ...minal Earth B2 Chassis 0 Output terminal High voltage transformer NO of RY3 A3 230V Approx 370 Ω WARNING DISCONNECT THE PLUG WHEN MEASURING RESISTANCE TEST DATA AT A GLANCE RE WIRING Ensure the following 1 Wires must not touch a High voltage parts Magnetron high voltage transformer high voltage capacitor and high voltage rectifier assembly b Parts that become hot Heating elements oven lamp oven ca...

Page 32: ...PRESSION COIL RESISTOR 680 k NOISE FILTER UNIT RESISTOR 10M LINE PYPASS CAPACITOR 0 0047µ AC250V LINE PYPASS CAPACITOR 0 0047µ AC250V FUSE F8A MONITORED LATCH SWITCH SW1 RECTIFIER CAPACITOR 0 97µF AC2100V MAGNETRON POWER TRANSFORMER MONITOR SWITCH SW2 HEATER TURNTABLE MOTOR FAN MOTOR OVEN LAMP CONTROL UNIT A3 A1 STOP SWITCH SW3 RY2 RY1 NO B1 B2 COM NO FM TTM OL A5 RY3 HVT THERMOSTAT OVEN THERMOSTA...

Page 33: ...µ AC250V FUSE 20A NOISE SUPPRESSION COIL RESISTOR 680 k NOISE FILTER UNIT RESISTOR 10M LINE PYPASS CAPACITOR 0 0047µ AC250V LINE PYPASS CAPACITOR 0 0047µ AC250V FUSE F8A MONITORED LATCH SWITCH SW1 RECTIFIER CAPACITOR 0 97µF AC2100V MAGNETRON POWER TRANSFORMER MONITOR SWITCH SW2 HEATER TURNTABLE MOTOR FAN MOTOR OVEN LAMP CONTROL UNIT A3 A1 STOP SWITCH SW3 RY2 RY1 NO B1 B2 COM NO FM TTM OL A5 RY3 HV...

Page 34: ...ED BRN BLU G Y 5 4 WHT 3 2 1 COM WHT NO NO COM STOP SWITCH NO COM GH GRILL HEATING ELEMENT N L WHT 1 3 5 2 1 COM NO COM NO CN B RY3 RY2 GRN CONTROL PANEL BLU BLU BRN TURNTABLE MOTOR RED MONITOR SWITCH LATCH SWITCH BLK BRN BRN BLK CN A CN A 1 CN B 2 RED GRN BRN BRN BLU W H T B L K B R N W H T B L U B R N B L U B L K B L U W H T B L K W H T W H T R E D LIVE NEUTRAL EARTH THERMAL CUT OUT 150 C OVEN W...

Page 35: ...AY C7 0 1µ 50v IC 1 IXA089DR D20 C30 R52 R61 4 7k 100k 100k R53 R20 1k D21 D22 C1 0 1µ 50v C20 10µ 50v C2 470µ 50v SP1 C4 R3 4 7k R40 3 3k R21 4 7k R5 240 R4 4 7k C5 J8 J6 J4 J2 Constant RY Timing Model J9 J7 J5 J3 ZD1 HZ5C 2 ZD2 HZ4A2 CF1 CST4 00MGW SEG20 R81 20 25 30 32 64 52 55 60 INT1 R83 R90 R91 R92 VDD R40 R41 R42 R43 R50 R51 SEG19 SEG18 SEG17 SEG16 SEG15 VDD SEG14 SEG13 SEG12 SEG11 SEG10 SE...

Page 36: ...R 64ST 36 1 2 3 4 SW2 5 6 SW3 SW4 SW5 SW6 SW7 CN G SW1 SWITCH UNIT CIRCUIT DIAGRAM Figure S 3 Switch unit circuit R64ST_S MANUAL 12 8 01 11 01 am 36 ...

Page 37: ...11 7 D30 D23 Q22 Q20 D22 5 1 D20 VRS1 CN A J3 J5 J7 J8 CN B 1 2 R10 R61 R62 R63 R64 R66 R67 R68 C1 S1 WH 1 WH 1 6 4 5 2 5 1 3 3 3 2 2 0 1 12 1 9 1 I C 1 3 J6 J4 J2 ZD1 1 5 9 4 J9 SW63 CR60 Q40 Q3 R30 R40 R20 R22 D21 RY1 GRILL SW50 J11 J1 F ZD20 R3 C30 C50 C51 C5 C6 C4 C1 C2 C21 C20 Q23 Q1 Q21 SP1 C7 R4 R5 B B E E E E E B C3 B S P T1 B SW62 CN G SW61 WH 2 DIP LD4 SW60 QKITPA018URE0 R64ST_S MANUAL 1...

Page 38: ...R 64ST 38 PRINTED WIRING BOARD OF SWITCH UNIT DIAGRAM Figure S 4 Printed Wiring Board of Switch SW6 SW4 SW2 SW3 SW1 SW5 CN G DIP 6 1 6 1 CN C WHITE EH GREEN KR SW7 R64ST_S MANUAL 12 8 01 11 01 am 38 ...

Page 39: ...DRZZ U LSI 1 BA LD1 4 VHPSLZ781C9 3 U Light emitting diode 4 AC Q1 VSKRA101M 3 U Transistor KRA101M 1 AA Q2 VSDTA123ES 3 U Transistor DTA123ES 1 AB Q3 VS2SB1238 3 U Transistor 2SB1238 1 AD Q20 VS2SB1238 3 U Transistor 2SB1238 1 AD Q21 22 VSKRA223M 3 U Transistor KRA223M 2 AB Q23 VSKRC243M 3 U Transistor KRC243M 1 AB Q24 VSKRA101M 3 U Transistor KRA101M 1 AA Q40 VSKRA101M 3 U Transistor KRA101M 1 A...

Page 40: ...10 JHNDPS002URT0 U Handle painted 1 AW 5 11 XEPSD30P10XS0 U Handle glass stopper screw 2 AA 5 12 HDECQS002URP0 U Door decoration SUS 1 AR 5 13 GCOVHA366WRF0 U Choke cover 1 AG CONTROL PANEL PARTS CONTINUED OVEN PARTS DOOR PARTS R32 VRD B12EF103J U Resistor 10k ohm 1 4W 1 AA R40 VRD B12EF332J U Resistor 3 3k ohm 1 4W 1 AA R50 51 VRD B12EF472J U Resistor 4 7k ohm 1 4W 2 AA R52 53 VRD B12EF104J U Res...

Page 41: ...580WRP1 U Exhaust duct 1 AK 6 2 LANG A052WRP0 U Exhaust duct angle 1 AD 6 3 PREFHA054WRP2 U Grill reflector 1 AQ 6 4 LANG A053WRP0 U Grill heater angle 1 AG 6 5 RHET A159WRE2 U Grill heater 112 5V 2 BB 6 6 QTANNA006WRE0 U Earth plate 1 AB 6 7 XBPWW30P05K00 U M C screw 2 AA 6 8 PCUSUA430WRP0 U Exhaust duct cushion 1 AA 6 9 PCUSUA419WRP0 U Cushion 1 AA 6 10 PDUC A579WRP4 U Air duct 1 AL 6 11 LANG A0...

Page 42: ...WRE0 7 11 7 2 6 2 6 3 6 7 6 6 6 4 6 5 1 16 1 15 7 1 7 2 4 1 1 5 1 1 4 2 1 2 8 1 8 2 1 4 1 3 4 3 7 10 7 1 7 5 7 1 7 2 7 1 4 11 7 1 7 1 7 1 2 2 2 2 4 7 7 3 1 13 1 14 6 11 1 11 4 10 4 9 1 17 4 12 1 18 6 1 6 8 7 7 2 1 7 1 7 1 7 7 6 10 7 1 7 4 7 6 7 6 4 6 1 8 1 6 8 11 4 4 4 5 7 1 x2 x4 4 8 1 7 7 9 7 1 7 1 7 2 7 5 x2 6 9 7 1 8 9 R64ST_S MANUAL 12 8 01 11 01 am 42 ...

Page 43: ...NTROL PANEL PARTS CONTROL PANEL PARTS AND DOOR PARTS DOOR PARTS 3 8 3 5 3 4 3 3 3 8 3 2 3 7 3 6 3 1D 3 1F 3 1E 3 9 3 1 5 9 5 4 5 3 5 1 5 13 5 5 5 6 5 7 5 12 5 10 5 8 5 11 5 5 2 X4 R64ST_S MANUAL 12 8 01 11 01 am 43 ...

Page 44: ...en permission of the publisher PACKING AND ACCESSORIES MISCELLANEOUS Actual wire harness may be different than illustration 8 3 8 6 8 5 8 7 MISCELLANEOUS PACKING ACCESSORIES TURNTABLE TRAY ROLLER STAY ACCESSORY HOLDER SPADA014URE0 Not replaceable items PACKING CASE DOOR PROTECTION SHEET SPADPA531WRE0 MICROWAVE OVEN TOP PAD ASSEMBLY FPADBA010URK0 POLYETHYLENG BAG SSAKHA047URE0 R 64ST SPAKCA428URR0 ...

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