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Sharp R-520DK Service Manual Download Page 45

43

R -520DK
R-520DW
R -530DK
R-530DW

HOW TO ORDER REPLACEMENT PARTS

To have your order filled promptly and correctly, please furnish the following information.

1. MODEL NUMBER
2. REF. NO.
3. PART NO.
4. DESCRIPTION

Order Parts from the authorized SHARP parts Distributor for your area.
Defective parts requiring return should be returned as indicated in the Service Policy.

PACKING AND ACCESSORIES

DOOR PROTECTION SHEET

SPADP0221MRE0

PLASTIC BAG

SSAKHB007MRE0 

PACKING CASE

SPAKCB283MRE0 (R-520DK)
SPAKCB284MRE0 (R-520DW)
SPAKCB285MRR1 (R-530DK)
SPAKCB285MRR2 (R-530DW)

TOP PAD ASSEMBLY

FPADBB038MRE0

INTO

THE

OVEN

CAVITY

6-5  TURNTABLE TRAY

6-4  TURNTABLE SUPPORT

6-8  OPERATION MANUAL

TRAY PACK

SPADPB042MRE0

BOTTOM PAD ASSEMBLY

FPADBB039MRE0

TRAY HOLDER

SPADFB051MRE0

6-10  RECIPE CARD for R530DK/DW

Summary of Contents for R-520DK

Page 1: ...OREWORD AND WARNING 3 PRODUCT SPECIFICATIONS 4 GENERAL INFORMATION 4 OPERATION 6 TROUBLESHOOTING GUIDE 10 TEST PROCEDURE 12 TOUCH CONTROL PANEL 21 COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE 29 PICTORIAL DIAGRAM 35 POWER UNIT CIRCUIT 36 LSI UNIT CIRCUIT 37 PRINTED WIRING BOARD 40 PARTS LIST 41 PACKING AND ACCESSORIES 43 S4009R530DUW R 520DK R 520DW R 530DK R 530DW MICROWAVEOVEN MODELS SERVICEMA...

Page 2: ...nce with the Federal Performance Standard should be performed on each oven prior to release to the owner BEFORE SERVICING Before servicing an operative unit perform a microwave emission check as per the Microwave Measurement Procedure outlined in this service manual If microwave emissions level is in excess of the specified limit contact SHARP ELECTRONICS CORPORATION immediately 1 800 237 4277 If ...

Page 3: ...ltage capacitor 4 Disconnect the leads to the primary of the power transformer 5 Ensure that the leads remain isolated from other components and oven chassis by using insulation tape 6 After that procedure reconnect the power supply cord When the testing is completed 1 Disconnect the power supply cord and then remove outer case 2 Open the door and block it open 3 Discharge high voltage capacitor 4...

Page 4: ...center of the oven cavity The water container shall be a low form of 600 ml 20 oz beaker with an inside diameter of approx 8 5 cm 3 1 2 in and made of an electrically nonconductive material such as glass or plastic The placing of this standard load in the oven is important not only to protect the oven but also to insure that any leakage is measured accurately 4 Set the cooking control on Full Powe...

Page 5: ...efective C The door packing is not damaged D The door is not deformed or warped E There is no other visible damage with the oven Servicing and repair work must be carried out only by trained service personnel DANGER Certaininitialpartsareintentionallynotgroundedandpresent a risk of electrical shock only during servicing Service personnel Do not contact the following parts while the appliance is en...

Page 6: ...s Kitchen Timer pad Clock pad Minute Plus pad Power Level pad Stop Clear pad Start pad Sensor Cooking pads Breakfast Bar pad Lunch on the Run pad One Dish Dinners pad Super Defrost pad Compu Defrost pad Beverage Center pad Number selection pads Kitchen Timer pad Clock pad Minute Plus pad Power Level pad Stop Clear pad Start Touch On pad Oven Cavity Light Yes Safety Standard UL Listed FCC Authorize...

Page 7: ...th see through window 7 Ventilation openings Rear 8 Auto Touch control panel 9 Time display Digital display 99 minutes 99 seconds 10 Coupling 11 Wave guide cover 12 Power supply cord R 520DK DW R 530DK DW TOUCH CONTROL PANEL 1 6 5 4 2 10 11 12 9 7 8 3 NOTE The directed features are disabled after one minute when the oven is not in use These features are automati cally enabled when the door is open...

Page 8: ... cook cycle when the door was opened 7 The monitor switch electrically monitors the operation of the secondary interlock switch and primary interlock relay and is mechanically associated with the door so that it will function in the following sequence 1 When the door opens from the closed position the primary interlock relay RY2 and secondary interlock switch open their contacts And contacts of th...

Page 9: ...turntable motor oven lamp and cooling fan motor are turned on but the power transformer is not turned on 3 After about 16 seconds the cook relay RY 2 is energized The power transformer is turned on microwave energy is produced and first stage is started The 16 seconds is the cooling time required to remove any vapor from the oven cavity and sensor NOTE During this first stage do not open the door ...

Page 10: ...OCK SWITCH TTM OL FM MONITOR FUSE 20A CAVITY TEMP FUSE MAGNETRON TEMP FUSE A1 A2 COM COM COM N O N C N O DOOR SENSING SWITCH RY 1 RY 2 CONTROL UNIT PRIMARY INTERLOCK RELAY B1 B2 GRN POWER TRANSFORMER CAPACITOR 1 0µF AC 2300V F3 F1 F2 AH SENSOR 120V AC 60 Hz OVEN LAMP TURN TABLE MOTOR FAN MOTOR MONITOR SWITCH H V RECTIFIER MAGNETRON SECONDARY INTERLOCK SWITCH TTM OL FM CAVITY TEMP FUSE A1 A2 COM CO...

Page 11: ...A BLOWN MONITOR FUSE TEST THE DOOR SENSING SWITCH PRIMARY INTERLOCK RELAY RY2 RELAY RY1 SECONDARY INTERLOCK SWITCH AND MONITOR SWITCH FOR PROPER OP ERATION REFERTOCHAPTER TESTPRO CEDURE NOTE MONITOR FUSE AND MONITOR SWITCH ARE REPLACED AS AN ASSEMBLY TURNTABLE MOTOR The turntable motor rotates the turntable located on the bottom of the oven cavity so that the foods on the turntable cook evenly dur...

Page 12: ... part FFS BA016 KIT as an assembly IMPORTANT Whenever troubleshooting is performed with the power supply cord disconnected It may in some cases be necessary to connect the power supply cord after the outer case has been removed in this event 1 Disconnect the power supply cord and then remove outer case 2 Open the door and block it open 3 Discharge high voltage capacitor 4 Disconnect the leads to t...

Page 13: ...uld sound and or time of day should appear in display Oven lamp does not light when door is opened Oven lamp does not go out when door is closed Oven lamp lights but fan motor and turntable motor do not operate Oven does not go into cook cycle when START pad 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 ...

Page 14: ... CAUTION SHOULD BE OBSERVED Power output of the magnetron can be measured by performing a water temperature rise test This test shouldonlybeusedifabovetestsdonotindicateafaultymagnetronandthereisnodefectinthefollowing componentsorwiring siliconrectifier highvoltagecapacitorandpowertransformer Thistestwillrequire a 16 ounce 453cc measuring cup and an accurate mercury thermometer or thermocouple typ...

Page 15: ... through the vent holes of the oven cavity especially the cooling fan and air guide 5 Reconnect all leads removed from components during testing 6 Reinstall the outer case cabinet 7 Reconnect the power supply cord after the outer case is installed 8 Run the oven and check all functions MAGNETRON TEMPERATURE FUSE TEST 1 Disconnect the power supply cord and then remove outer case 2 Open the door and...

Page 16: ...m components during testing 6 Reinstall the outer case cabinet 7 Reconnect the power supply cord after the outer case is installed 8 Run the oven and check all functions PRIMARY INTERLOCK SYSTEM TEST DOOR SENSING SWITCH 1 Disconnect the power supply cord and then remove outer case 2 Open the door and block it open 3 Discharge high voltage capacitor 4 Isolatetheswitchandconnecttheohmmetertothecommo...

Page 17: ... cannot be performed with only a voltmeter and ohmmeter In this service manual the touch control panel assembly is divided into two units Control Unit and Key Unit and also the Control Unit is divided into two units LSI Unit and Power Unit and troubleshooting by unit replacement is described according to the symptoms indicated Before testing 1 Disconnect the power supply cord and then remove outer...

Page 18: ... possible problems caused by defective control unit a Buzzer does not sound or continues to sound b Clock does not operate properly c Cooking is not possible When testing is completed 1 Disconnect the power supply cord and then remove outer case 2 Open the door and block it open 3 Discharge high voltage capacitor 4 Reconnect all leads removed from components during testing 5 Re install the outer c...

Page 19: ...24 0V D C Oven lamp Turntable motor Cooling fan motor RY2 Approx 23 0V D C Power transformer 8 Disconnect the power supply cord and then remove outer case 9 Open the door and block it open 10 Discharge high voltage capacitor 11 Reconnect all leads removed from components during testing 12 Re install the outer case cabinet 13 Reconnect the power supply cord after the outer case is installed 14 Run ...

Page 20: ...cator does not light up after above check and repairs are finished 1 Disconnect the power supply cord and then remove outer case 2 Open the door and block it open 3 Discharge high voltage capacitor 4 Disconnect the leads to the primary of the power transformer 5 Ensure that these leads remain isolated from other components and oven chassis by using insulation tape 6 After that procedure reconnect ...

Page 21: ...the oven will shut off Water load cooking test WARNING The oven should be fully assembled before following procedure Make sure the oven has been plugged in at least two minutes before checking sensor cook operation The cabinet should be installed and screws tightened 1 Fill approximately 200 milliliters 7 2 oz of tap water in a 1000 milliliter measuring cup 2 Place the container on the center of t...

Page 22: ...procedure re connect the power supply cord 9 Check the sensor cook operation proceed as follows 9 1 For R 520DK DW touch REHEAT SENSOR pad once For R 530DK DW touch Sensor reheat pad and touch Start pad 9 2 The control panel is in the sensor cooking operation 9 3 After approximately 40 seconds push plunger of select switch for more than 3 seconds This condition is same as judgement by AH sensor 9 ...

Page 23: ... LD19 9 Absolute Humidity Sensor Circuit This circuit detects moisture of the cooking food to allow its automatic cooking The touch control section consists of the following units 1 Key Unit 2 Control Unit The Control Unit consists of Power Unit and LSI Unit The principal functions of these units and the signals com municated among them are explained below Key Unit The key unit is composed of a ma...

Page 24: ...ff the cook relay RY2 The signalsholds L levelduringmicrowavecook ing and H level while not cooking In other cooking modes variable cooking the signal turns to H level and L level in repetition according to the power level ON and OFF times for other power level 17 P04 OUT Oven lamp fan motor and turntable motor driving signal To turn on and off shut off relay RY1 The square waveform voltage is del...

Page 25: ...r circuit and connected to the A D converter built into the LSI 34 ANI6 IN Input terminal to judge the model The signal out of P112 will be input into ANI6 through G6 line on key matrix The LSI will judge the model by this signal 35 ANI7 IN Signal coming from touch key When either G13 line on key matrix is touched a corresponding signal out of P110 P117 will be input into ANI7 When no key is touch...

Page 26: ...1 S19 79 SEG 19 S2 62 SEG 2 S20 80 SEG 20 S3 63 SEG 3 S21 81 SEG 21 S4 64 SEG 4 S22 82 SEG 22 S5 65 SEG 5 S23 83 SEG 23 S6 66 SEG 6 S24 84 SEG 24 S7 67 SEG 7 S25 85 SEG 25 S8 68 SEG 8 S26 86 SEG 26 S9 69 SEG 9 S27 87 SEG 27 S10 70 SEG 10 S28 88 SEG 28 S11 71 SEG 11 S29 89 SEG 29 S12 72 SEG 12 S30 90 SEG 30 S13 73 SEG 13 S31 91 SEG 31 S14 74 SEG 14 S32 92 SEG 32 S15 75 SEG 15 S33 93 SEG 33 S16 76 S...

Page 27: ... P111 OUT Key strobe signal Signal applied to touch key section A pulse signal is input to ANI7 P100 P101 P102 and P103 terminal while one of G7 line keys on key matrix is touched 21 P112 OUT Key strobe signal Signal applied to touch key section A pulse signal is input to ANI6 ANI7 P100 P101 P102 and P103 terminal while one of G6 line keys on key matrix is touched 22 P113 OUT Key strobe signal Sig...

Page 28: ...erter Connected to GND 38 P100 IN Signal similar to ANI7 WheneitherG12lineonkeymatrixistouched acorrespondingsignalwillbeinputintoP100 39 P101 IN Signal similar to ANI7 WheneitherG11lineonkeymatrixistouched acorrespondingsignalwillbeinputintoP101 40 VSS1 IN Power source voltage 5 0V The power source voltage to the drive LSI is input to VSS1 terminal Connected to VC 41 P102 IN Signal similar to ANI...

Page 29: ...ned on in such a way as to change the resistance values in parallel with R98 R102 Changing the resistance values results in that there is the same potential at both F 3 terminal of the absolute humidity sensor and ANI4 terminal of the LSI The voltage of ANI5 terminal will indicate about 2 5V This initial balancing is set up about 16 seconds after the unit is put in the Sensor Cooking mode As the s...

Page 30: ...nel and the oven itself is so short that the two can t be separated For those models check and repair all the controls sensor related ones included of the touch control panel while keeping it connected to the oven B On some models the power supply cord between the touch control panel and the oven proper is long enough that they may be separated from each other For those models it is possible to ch...

Page 31: ...ARNING FOR WIRING 1 Disconnect the power supply cord 2 Make sure that a definite click can be heard when the microwave oven door is unlatched Hold the door in a closed position with one hand then push the door open button with the other this causes the latch leads to rise it is then possible to hear a click as the door switches operate 3 Visuallycheckthedoorandcavityfaceplatefordamage dents cracks...

Page 32: ...filament lead short one of the power transformer from the high voltage capacitor 7 Remove one 1 screw holding capacitor holder with the high voltage rectifier to the base plate 8 Disconnect rectifier terminal from capacitor High voltage rectifier assembly is now free 9 Remove capacitor holder Capacitor is now free CAUTION WHEN REPLACING HIGH VOLTAGE RECTI FIER AND HIGH VOLTAGE CAPACITOR GROUND SID...

Page 33: ...it carefully so that there is no excessive force applied to the ribbon connection Oven lamp socket Terminal Wire lead Terminal hole Flat type small screw driver Terminal Push Pull down 1 2 Lever Positive lock connector LSI unit 1 Disconnect the power supply cord 2 Removeturntableandturntablesupportfromovencavity 3 Lay the oven on it s backside Remove the turntable motor cover by snipping off the m...

Page 34: ...y after installation Make sure that the axis of the shaft is not slanted 5 Install the fan motor to the the oven cavity back plate with the two 2 screws 6 Connect the wire leads to the fan motor referring to the pictorial diagram Side View Rear View 1 Disconnect the power supply cord and remove outer case 2 Open the door and block it open 3 Discharge high voltage capacitor 4 Disconnect wire leads ...

Page 35: ...efer to Microwave Measurement Procedure Figure C 3 Latch Switch Adjustments REMOVAL 1 Disconnect the power supply cord 2 Push the open button and open the door slightly 3 Insert a putty knife thickness of about 0 5mm into the gap between the choke cover and door frame as shown in Figure C 4 to free engaging parts 4 Pry the choke cover by inserting a putty knife as shown Figure C 4 5 Release choke ...

Page 36: ...akage around door with an approvedmicrowavesurveymeter RefertoMicrowave Measurement Procedure Note The door on a microwave oven is designed to act as an electronic seal preventing the leakage of microwave energy from oven cavity during cook cycle Thisfunctiondoesnotrequirethatdoorbeair tight moisture condensation tight or light tight Therefore occasionalappearanceofmoisture light or sensing of gen...

Page 37: ...COM NO NOTE The neutral WHT GRY wire must be connected to the terminal with N mark on the power supply cord RED WHT RED WHT WHT ORG WHT PNK GRN GRN to Oven cavity WHT WHT RED BLK WHT WHT BLUE MARK WHT RED WHT CAVITY TEMP FUSE MAGNETRON TEMP FUSE FAN MOTOR MONITOR FUSE HOLDER RED RED WHT 1 WHT GRY WHT GRN ORG ORG CN A H N NOTE The grounding conductor of the power supply cord has been grounded by po...

Page 38: ... 1000µ 35v SP1 J1 10G471K C 2 C 3 C 9 C 4 C 1 C 5 C 6 C 8 C 7 C11 A 2 D 1 D 3 NO NO COM COM B 2 B 1 C12 AC A 1 CN A R4 27 D5 T1 1 3 4 D1 D3 D2 D4 6 a b c d VRS1 J1 D7 D8 1SS270A 1SS270A 10G471K C1 0 1µ 50v C3 0 1µ 50v ZD1 HZ16 1 C5 10µ 35v C2 1000µ 35v C4 10µ 35v R1 2 4k 1SS270A 1SS270A D1 D4 11ES1 D6 R5 4 7k R2 680 1 2w R3 510 1 2w R6 3 3k Q2 2SB1238 SP1 PKM22EPT Q1 2SB1238 RY1 RY2 Q3 KRC243M CN ...

Page 39: ...113 P114 P115 P116 P117 AVSS ANI0 ANI1 ANI2 P37 S21 SEG21 SEG35 S22 S23 S24 S25 S26 S27 S28 S29 S30 S31 S32 S33 S34 S35 P83 P82 P81 P80 P25 P36 P35 P34 P33 P32 P31 P30 P103 P102 VSS1 P101 P100 VDD0 ANI7 ANI6 ANI5 ANI4 ANI3 AVREF R101 75kF R40 4 7k R67 15k R66 15k R65 15k R64 15k R63 15k R62 15k R61 15k R60 15k R79 270k ANI6 ANI7 P100 P101 P102 P103 R78 270k R77 270k R76 270k R75 270k R74 270k R102...

Page 40: ...P81 P80 P25 P36 P35 P34 P33 P32 P31 P30 P103 P102 VSS1 P101 P100 VDD0 ANI7 ANI6 ANI5 ANI4 ANI3 AVREF R102 37 4kF R40 4 7k R67 15k R66 15k R65 15k R64 15k R63 15k R62 15k R61 15k R60 15k R79 270k P103 P102 P101 P100 ANI7 ANI6 R78 270k R77 270k R76 270k R75 270k R74 270k R101 75kF R100 150kF R99 300k R98 620k R10 1k R11 15k R68 15k R69 15k R70 15k R71 15k R72 15k R73 15k R41 15k R92 1 8kF R90 330 1w...

Page 41: ...EG8 SEG7 SEG6 SEG5 SEG4 SEG3 SEG2 SEG1 COM1 COM2 COM3 COM4 COM5 COM6 COM7 COM8 VDD NC NC RESET TEST VREF R03 R02 R01 R00 P13 P12 P11 P10 P03 P02 P01 P00 K03 K02 K01 K00 NC NC NC SEG11 SEG12 SEG13 SEG14 SEG15 SEG16 SEG17 SEG18 SEG19 SEG20 SEG21 SEG22 SEG23 SEG24 SEG25 SEG26 SEG27 SEG28 SEG29 SEG30 SEG31 SEG32 SEG33 SEG34 SEG9 1 100 76 75 51 25 IC3 IZA951DR 26 50 R134 15k R132 33k R133 510k R120 4 7...

Page 42: ... Figure S 5 Printed Wiring Board of Power Unit WH 1 SH B SH A 1 C3 C4 C5 R3 C2 F C1 10 D4 D2 D1 D3 J1 D9 D10 RY3 CN D D8 ZD1 VRB D U R2 R1 R6 R5 SP1 3 E B D6 D5 Q2 R4 2 6 11 P S RY2 T1 AC VRS1 5 D7 OMIF D U 9 8 7 E Q1 B 4 E RY1 AC OL TTM FM B Q3 CN C CN C CN B CN A 1 1 9 12 1 1 1 2 XA VH 2 2 ...

Page 43: ...Capacitor 0 1 uF 50V R 530DK DW 1 AA C2 VCEAB31VW108M J Capacitor 1000 uF 35V 1 AF C3 RC KZA087DRE0 J Capacitor 0 1 uF 50V R 530DK DW 1 AA C4 5 VCEAB31VW106M J Capacitor 10 uF 35V R 530DK DW 2 AA D1 4 VHD11ES1 1 J Diode 11ES1 4 AB D5 8 VHD1SS270A 1 J Diode 1SS270ATA R 530DK 4 AA Q1 2 VS2SB1238 3 J Transistor 2SB1238 2 AA Q3 VSKRC243M 3 J Transistor KRC243M R 530DK DW 1 AB R1 VRD B12EF242J J Resist...

Page 44: ...een R 520DK 1 AK 5 5 HPNL B089MRE0 M Door screen R 530DK 1 AK 5 5 HPNL B090MRE0 M Door screen R 520DW 1 AW 5 5 HPNL B090MRE0 M Door screen R 530DW 1 AW 5 6 PCUSU0464MRE0 M Cushion 1 AC MISCELLANEOUS 6 1 FW VZB125MRE0 M Stop switch harness 1 AF 6 2 FW VZB168MRE0 M Main wire harness 1 AU 6 3 TLABBB007MRE0 M Cavity hole cover 1 AA 6 4 FROLPB025MRK0 M Turntable support 1 AN 6 5 NTNT A099WRE0 M Turntab...

Page 45: ...ts requiring return should be returned as indicated in the Service Policy PACKING AND ACCESSORIES DOOR PROTECTION SHEET SPADP0221MRE0 PLASTIC BAG SSAKHB007MRE0 PACKING CASE SPAKCB283MRE0 R 520DK SPAKCB284MRE0 R 520DW SPAKCB285MRR1 R 530DK SPAKCB285MRR2 R 530DW TOP PAD ASSEMBLY FPADBB038MRE0 INTO THE OVEN CAVITY 6 5 TURNTABLE TRAY 6 4 TURNTABLE SUPPORT 6 8 OPERATION MANUAL TRAY PACK SPADPB042MRE0 B...

Page 46: ...H OVEN AND CABINET PARTS 2 3 4 7 6 7 1 5 4 6 4 8 4 11 7 11 7 2 1 15 4 9 6 3 6 5 6 4 2 1 7 11 1 12 4 10 4 13 7 2 7 2 7 5 4 3 1 13 1 10 7 3 7 6 7 6 1 9 7 8 7 8 4 2 7 5 1 11 1 3 1 4 7 4 1 8 1 8 4 4 7 1 4 1 1 1 1 2 2 2 2 2 2 2 2 2 7 5 7 5 4 12 7 5 6 6 1 7 1 6 4 5 1 14 7 10 7 7 7 10 7 9 7 9 7 7 ...

Page 47: ...G H A B C D E F G H CONTROL PANEL PARTS MISCELLANEOUS 3 3 3 5 3 1 3 5 3 2 3 4 3 2 2 3 2 1 3 2 3 R 520DK DW R 530DK DW 3 2 3 4 3 3 3 1 3 5 3 5 3 2 2 3 2 1 3 2 3 Actual wire harness may be different from illustration 6 9 6 2 5 1 5 1 2 5 1 1 5 3 5 4 5 5 5 2 5 6 6 1 DOOR PARTS ...

Page 48: ...YRIGHT 2000 BY SHARP CORPORATION ALL RIGHTS RESERVED No part of this publication may be repro duced stored in retrieval systems or trans mitted in any form or by any means elec tronic mechanical photocopying record ing or otherwise without prior written per mission of the publisher ...

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