Sharp R-15AM Service Manual Download Page 29

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R-15AM

Figure S-1. Pictrorial Diagram

TC1: THERMAL

CUT-OUT

125˚C(OVEN)

FM:

FAN MOTOR

WHT

YLW

WHT

BLK

HIGH VOLTAGE COMPONENTS

MG: MAGNETRON

C: H.V.

CAPACITOR

F2: H.V.

FUSE

FERRITE

CRAMP

H.V.

RECTIFIER

T: HIGH VOLTAGE TRANSFORMER

G-Y

POWER SUPPLY

CORD

COM

GRY

WHT

ORG

WHT

N.C.

N.O.

COM.

ORG

WHT

AM:

ANTENNA

MOTOR

SW3: MONITOR

SWITCH

GRY

ORG

BLK

YLW

IC1

RY3

RY2

RY1

CN-A

CN-B

2
3
4

Y L W

P N K

Y L W

P N K

W H T

CN-A

NEUTRAL

EARTH

GRN

GRY

N.O.

COM.

SW2:

2ND. INTERLOCK

RELAY CONTROL

SWITCH

SW1:

1ST. INTERLOCK

SWITCH

CONTROL UNIT

GRN

G R N

GRY

CN-B

GRY

ORG

BRN

RED

WHT

ORG

NOTE:

Neutral (WHT) wire must

be connected to the termi-

nal with black mark on the

oven light socket.

BLACK MARK

BRN

BLU

LIVE

OL:

OVEN LAMP

AND SOCKET

WHT

RED

WHT

RED

TC2:

THERMAL

CUT-OUT

145˚C(MAG.)

BRN

PNK

Summary of Contents for R-15AM

Page 1: ...NT COVER CAUTION MICROWAVE RADIATION Indside front cover WARNING 1 SERVICING 2 PRODUCT SPECIFICATIONS 5 GENERAL INFORMATION 5 APPEARANCE VIEW 6 OPERATION SEQUENCE 7 FUNCTION OF IMPORTANT COMPONENTS 8 TROUBLESHOOTING GUIDE 9 TEST PROCEDURE 10 CONTROL PANEL ASSEMBLY 15 COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE 19 MICROWAVE MEASUREMENT 25 TEST DATA AT A GLANCE 25 WIRING DIAGRAM 26 PICTORIAL DIAG...

Page 2: ...käytetään tai jos se kytketään väärin Kaikkien mikroaaltoliitäntöjen sekä syöttö että ulostulopuolella aaltoputkien laippojen ja tiivisteiden tulee olla varmistettuja Mikroaaltouunnia ei koskaan saa käyttää ilman kuormaa jossa mikroaaltoenergiaa kuluu Avoimeen aaltoputkeen tai antenniin ei koskaan saa katsoa virran ollessa kytkettynä ADVARSEL MIKROBØLGESTRÅLING Personell må ikke utsettes for mikro...

Page 3: ...stjerne benyttes med højere spænding end 250 volt 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 enginee...

Page 4: ... die een zeer hoge spanning en stroom kunnen voortbrengen Contact met de volgende onderdelen kan elektrocutie tot gevolg hebben Hoogspanningscondensator hoogspanningstransformator magnetron hoogspanningsgelijkrichter hoogspannings kabelboom VERGEET DE VOLGENDE 3 STAPPEN NIET 1 Haal de stekker uit het stopcontact 2 Open de deur en zorg ervoor dat hij niet dicht kan vallen 3 Ontlaad de hoogspannings...

Page 5: ...anscurran los dos minutos temporizador a cero compruebe cuidadosamente que el agua se ha calentado Si el agua permaneciese fría efectúe las comprobaciones 3D y vuelva a examinar las conexiones de los componentes que han sido probados Cuando haya terminado la intervención en el equipo y el horno haya sido ensamblado de nuevo completamente deberá comprobar la potencia de salida de microondas y reali...

Page 6: ... caso eseguire i tre controlli sopra citati e quindi scollegare i connettori dal primario del trasformatore Assicurarsi che tali connettori non vengano a contatto con altri componenti ne con il telaio del forno fare uso se necessario di nastro isolante Al termine dell intervento eseguire nuovamente i tre controlli e ricollegare i conduttori al primario del trasformatore QUATTRO VERIFICHE IMPORTANT...

Page 7: ... of RF microwave energy measured by method of IEC 60705 Operating frequency 2450 MHz Case Dimensions Width 520 mm Height 309 mm including foot Depth 424 mm Cooking Cavity Dimensions Width 351 mm Height 211 mm Depth 372 mm Control Complement Jog Touch Control System Timer 0 30 minutes Microwave Power for Variable Cooking Repetition Rate 100P Full power throughout the cooking time 70P approx 70 of F...

Page 8: ...ower level Cooking in progress 3 1 min button 4 MICROWAVE POWER LEVEL button 5 STOP button 6 START button 7 TIMER knob OVEN 1 Control panel 2 Door lock openings 3 Oven lamp 4 Ceramic floor Not removal 5 Door hinges 6 Door 7 Door open handle 8 Safty door latches 9 Door seals and sealing surfaces 10 Cavity face plate 11 Air ventilation cover and openings 12 Power supply cord 13 Air intake openings 1...

Page 9: ...ooking Open No cooking 1st interlock switch COM NO Closed Opened 2nd interlock relay control switch COM NO Closed Opened Monitor Switch COM NC Opened Closed The circuit to the high voltage transformer fan motor oven lamp and antenna motor are cut off when the 1st interlock switch SW1 and 2nd interlock relay control switch SW2 are made open The oven lamp remains on even if the oven door is opened a...

Page 10: ...ermal cut out protects the magnetron against over heating If the temperature goes up higher than 145 C because the fan motor is interrupted or the ventilation openings are blocked the thermal cut out will open and line voltages to the high voltage transformer will be cut off and the operation of the magnetron will be stopped The thermal cut out will not resume THERMAL CUT OUT TC1 125 C OVEN The th...

Page 11: ...door is opened Oven lamp lights but fan motor and antenna motor do not operate Oven does not go into cook cycle when START button is touched Oven seems to be operating but little or no heat is produced in oven load Food incompletely cooked or not cooked at all at end of cook cycle Oven goes into a cook cycle but extremely uneven heating is produced in oven load food Oven does not cook properly whe...

Page 12: ...ssel are at ambient temperature prior to the start the test 3 Temperature of the water The initial temperature of the water is 10 1 C 4 Select the initial and final water temperature so that the maximum difference between the final water temperature and the ambient temperature is 5 C 5 Select stirring devices and measuring instruments in order to minimize addition or removal of heat 6 The graduati...

Page 13: ... of the high voltage rectifier and note the reading obtained Reverse the meter leads and note this second reading The normal resistance is infinite in one direction and more than 100 kΩ in the other direction CARRY OUT 4R CHECKS NOTE FOR MEASUREMENT OF THE RESISTANCE OF THE RECTIFIER THE BATTERIES OF THE MEASURING INSTRUMENT MUST HAVE A VOLTAGE AT LEAST 6 VOLTS BE CAUSE OTHERWISE AN INFINITE RESIS...

Page 14: ...the food in the oven cavity may catch fire this may be due to over heating produced by improper setting of the cooking timer or failure of the control panel CARRY OUT 4R CHECKS G BLOWN FUSE F1 F10A CARRY OUT 3D CHECKS If the fuse F1 F10A is blown when the door is opened check the 1st interlock switch SW1 monitor switch SW3 and relay RY 2 If the fuse F1 F10A is blown there could be a short or groun...

Page 15: ...ding semiconductors such as LSI ICs etc Therefore unlike conventional microwave ovens proper maintenance can not be performed with only a voltmeter and ohmmeter In this service manual the touch control panel assembly is in one unit and troubleshooting by unit replacement is described according to the symptoms indicated Control Panel The following symptoms indicate a defective control unit 1 Tact S...

Page 16: ... ON indicator does not light up CARRY OUT 3D CHECKS STEPS OCCURRENCE CAUSE OR CORRECTION 1 The rated AC voltage is not present at Check supply voltage and oven power cord Power terminal of CPU connector CN A 2 The rated AC 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...

Page 17: ...lse signal is returned to the LSI 10 Back Light Circuit A circuit to drive the back light Light emitting diodes LED1 LED4 TOUCH CONTROL PANEL ASSEMBLY OUTLINE OF TOUCH CONTROL PANEL The touch control section consists of the following units as shown in the touch control panel circuit The principal functions of these units and the signals communicated among them are explained below Tact Switch Signa...

Page 18: ...N 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 is the basic timing for time processing of LSI 20 R81 ...

Page 19: ... 36 R61 OUT Tact switch strobe signal Signal applied to tact switch section A pulse signal is input to R53 terminal while the tact switch SW61 is touched 37 R62 OUT Tact switch strobe signal Signal applied to tact switch section A pulse signal is input to R53 terminal while the tact switch SW62 is touched 38 R63 OUT Tact switch strobe signal Signal applied to tact switch section A pulse signal is ...

Page 20: ... power supply cord between the touch control panel and the oven proper is so long enough that they may be separated from each other For those models therefore it is possible to check and repair the controls of the touch control panel while keeping it apart from the oven proper in this case you must short both ends of the door sensing switch on PWB of the touch control panel with a jumper which bri...

Page 21: ...EMENT AND ADJUSTMENT PROCEDURE WARNING Avoid possible exposure to microwave energy Please follow the instructions below before operating the oven 1 CARRY OUT 3D CHECKS 2 Disconnect the filament leads of high voltage transformer from high voltage capacitor and the magnetron 3 Disconnect the H V fuse from the high voltage trans former 4 Disconnect the main wire harness from the high voltage HIGH VOL...

Page 22: ...P SOCKET REMOVAL Figure C 1 Oven lamp socket 1 Disconnect the oven from the power supply 2 Remove the one 1 screw holding the base plate cover to the base plate and remove the base plate cover 3 Disconnect the wire leads from the antenna motor and ANTENNA MOTOR REMOVAL remove the one 1 screw holding the antenna motor 4 Remove the antenna motor shaft from the antenna motor 5 Now the antenna motor i...

Page 23: ...wing procedure 3 Hold the center of the bracket which supports the shaft of the fan motor on the flat table 4 Install the fan blade to the shaft of fan motor by pushing the fan blade with a small light weight ball peen hammer or rubber mallet CAUTION Do not hit the fan blade hard when installing be cause the bracket may be disfigured Make sure that the fan blade rotates smooth after installation M...

Page 24: ... not activated with the door closed loosen screw and adjust the latch hook position After adjustment check the following 1 In and out play of door remains less than 0 5mm when in the latched position First check upper position of latch hook pushing and pulling upper portion of door toward the oven face Then check lower portion of the latch hook pushing and pulling lower portion of the door toward ...

Page 25: ...ng NOTE After any service to the door A Make sure that 1st interlock switch SW1 2nd interlock relay control switch SW2 and monitor switch SW3 are operating properly Refer to chap ter Test Procedures B An approved microwave survey meter should be used to assure compliance with proper micro wave radiation emission limitation standards Refer to Microwave Measurement Procedure After any service make s...

Page 26: ...nna and antenna holder so that the hole of the antenna holder fit to the centre of the stirrer antenna s big blade Refer to Figure C 9 ANTENNA MOTOR SHAFT REPLACEMENT 3 Hook the hole of the antenna holder on the tab of the oven cavity bottom plate Refer to Figure C 10 4 Insert the antenna holder into the hole of the oven cavity bottom plate and fit the hole of the antenna holder with an antenna mo...

Page 27: ... test instrument is operating nor mally as specified in its instruction booklet Important Survey instruments that comply with the requirement for instrumentations as prescribed by the performance standard for microwave ovens must be used for test ing 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 15m...

Page 28: ...RN LIVE NEUTRAL G Y F1 FUSE F10A N L DISCHARGE RESISTOR 680 kΩ 1 2W NOISE SUPPRESSION COIL NOISE FILTER F2 H V FUSE 0 75A LINE BYPASS CAPACITOR 0 0033µF AC 250V DISCHARGE RESISTOR 10MΩ 1 2W LINE BYPASS CAPACITOR 0 0033µF AC 250V LINE CROSS CAPACITOR 0 22µF AC 250V T HIGH VOLTAGE TRANSFORMER MG MAGNETRON H V RECTIFIER C CAPACITOR 1 07µF AC2300V ANTENNA MOTOR FAN MOTOR OVEN LAMP SW3 MONITOR SWITCH C...

Page 29: ...O COM ORG ORG WHT WHT AM ANTENNA MOTOR SW3 MONITOR SWITCH GRY GRY ORG BLK YLW IC1 RY3 T1 RY2 RY1 CN A 1 1 5 2 CN B 2 3 4 5 1 Y L W P N K P N K Y L W P N K W H T CN A NEUTRAL EARTH GRN GRY N O COM SW2 2ND INTERLOCK RELAY CONTROL SWITCH SW1 1ST INTERLOCK SWITCH CONTROL UNIT 2 1 GRN G R N G R N GRY CN B GRY ORG BRN RED WHT ORG NOTE Neutral WHT wire must be connected to the termi nal with black mark o...

Page 30: ...G4 SEG3 SEG2 SEG1 SEG0 R73 R72 R71 R70 R63 R62 R61 R60 R53 R52 SEG19 SEG18 SEG17 SEG16 S1 S2 S3 S4 S5 S6 S7 S8 S9 S10 S11 S12 C3 C2 C1 SEG15 VDD SEG14 SEG13 SEG12 SEG11 SEG10 SEG9 INT1 R83 R90 R91 R92 VDD R40 R41 R42 R43 R50 R51 SP1 D20 D21 D1 D3 LD1 WH 1 WH 2 R1 510 1w R22 91 1 2w R20 1k R2 510 1w LD2 LD3 LD4 D4 Q1 KRA101M Q24 KRA101M Q23 KRC243M Q21 KRA223M D23 D30 R32 10k R30 15k R31 4 7k SW50 ...

Page 31: ... B C A AC R31 R50 CF1 2 6 8 10 12 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 S...

Page 32: ...CONTROL PANEL PARTS 3 1 DPWBFC157WRKZ Control unit 1 BM 3 2 FPNLCB772WRKZ Control panel frame assembly 1 BA 3 2 1 GCOVAA330WRRZ C P case 1 BA 3 3 JBTN B263WRTZ Select button 1 3 4 JKNBKA657WRTZ Timer knob 1 AQ 3 5 XEPSD30P08XS0 Screw 3mm x 8mm 7 AA OVEN PARTS 4 1 FGLSPA062WRE0 Ceramic shelf 1 BL 4 2 DOVN A514WRY0 Oven cavity 1 BU 4 3 MLEVPA227WRF0 Latch switch lever A 1 AF 4 4 MLEVPA228WRF0 Latch ...

Page 33: ...oke cover 1 AM 5 18 HBDGCA112WREZ Door badge 1 AG 5 19 XEPSD40P25K00 Screw 4mm x 25mm 2 AB 5 20 PCUSUA508WRP0 Cushion 1 AC 5 21 PCUSGA514WRP0 Cushion 1 AG MISCELLANEOUS 6 1 TINSZA100WRRZ Instruction book 1 AQ 6 2 FW VZB997WREZ Main wire harness 1 BC 6 3 TCAUHA276WRRZ Caution sheet 1 AH 6 4 TCAUHA168WRR0 H caution label 1 AH 6 5 TCAUAA249WRR0 Caution label 1 AE SCREWS NUTS AND WASHERS 7 1 XHPSD40P0...

Page 34: ...5 SW1 1 2 4 29 F2 7 5 4 16 7 3 7 11 2 5 4 31 4 7 SW3 4 6 4 6 4 24 2 4 4 10 2 1 4 14 7 1 4 8 6 5 2 3 7 10 7 3 7 3 4 11 T SW2 4 22 4 17 4 27 7 3 4 26 7 3 7 1 1 1 TC2 1 1 4 26 4 15 7 9 7 14 7 8 4 35 7 10 7 2 FM 7 15 7 1 C 4 30 2 4 2 2 4 13 4 12 7 11 7 3 7 10 7 1 F1 4 2 4 19 4 33 4 28 4 25 4 1 7 6 7 13 7 13 7 13 4 9 4 34 4 21 4 18 OL 1 3 4 23 6 4 x2 4 32 x3 1 4 ...

Page 35: ...MISCELLANEOUS DOOR PARTS 3 2 1 3 2 3 5 3 5 3 1 3 4 3 5 3 5 3 3 Actual wire harness may be different from illustration 5 5 5 10 5 6 5 17 5 4 2 5 4 4 5 16 5 16 6 2 5 15 5 7 5 8 5 14 5 8 5 9 5 13 5 19 5 19 5 11 5 12 5 12 5 3 5 4 4 5 4 1 5 1 5 4 3 5 4 5 5 21 5 20 5 4 5 18 5 2 5 16 5 16 x4 x2 ...

Page 36: ...S0 EE PACKING AND ACCESSORIES INSTRUCTION BOOK TOP PAD ASSEMBLY FPADBA385WRK0 BOTTOM PAD ASSEMBLY FPADBA386WRK0 WRAP COVER SSAKHA034WRE0 DOOR PROTECTION SHEET SPADPA204WRE0 PACKING CASE SPAKCE006WREZ Not Replaceable Items TRAY HOLDER SPADFA435WRE0 Into the Oven Cavity CAUTION SHEET ...

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