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R-408DW
R - 4 1 0 D K
R-410DW

6

4

5

1

2

3

6

4

5

1

2

3

A

B

C

D

E

F

G

H

A

B

C

D

E

F

G

H

CN - B

CN - C

OL

TTM FM

SP1

RY1

RY3

RY2

MICRO

BROWNER

VH

AC

OM

DU

OM

OM

DU

DU

1

7

4

F

3

AC

SW (GREEN)

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1

1

1

2

2

9

2

SH - B

(D3)
(D4)

C1

(XA)

P

S

(D2)

(J1)

D1

VRS1

T1

CN - A

SH - A

DIP

Figure S-5 . Printed Wiring Board of Power Unit

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Summary of Contents for R-408DW

Page 1: ...CATIONS 4 GENERAL INFORMATION 4 OPERATION 6 TROUBLESHOOTING GUIDE 9 TEST PROCEDURE 10 TOUCH CONTROL PANEL 18 COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE 22 PICTORIAL DIAGRAM 28 POWER UNIT CIRCUIT 29 CPU UNIT CIRCUIT 30 PRINTED WIRING BOARD 31 PARTS LIST 32 PACKING AND ACCESSORIES 36 S30M142R410DE R 408DW R 410DK R 410DW MICROWAVE OVEN MODELS SERVICE MANUAL R 410DW MINUTE PLUS POPCORN BEVERAGE C...

Page 2: ...ion and transmission systems shall be repaired replaced or adjusted by procedures described in this manual before the oven is released to the owner e A microwave leakage check to verify compliance 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 Micr...

Page 3: ...e 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 Rec...

Page 4: ...F in the 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 ...

Page 5: ...ing 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 Certaininitialpartsareintentionallynotgroundedandpresenta riskofelectricalshockonlyduringservicing Servicepersonnel Do not contact the following parts while the appliance is energized High Voltage Capacitor P...

Page 6: ...bilityandobligationofthecustomertocontact ITEM DESCRIPTION PowerRequirements 120 Volts 14 6 Amperes 1650 Watts 60 Hertz Single phase 3 wire grounded PowerOutput 1200 watts IEC 705 TEST PROCEDURE Operatingfrequencyof2450MHz CaseDimensions Width 21 21 32 Height 12 3 8 Depth 18 7 16 Cooking Cavity Dimensions Width 15 23 32 Height 9 21 32 1 6 Cubic Feet Depth 17 7 8 ControlComplement Touch Control Sys...

Page 7: ...wise 5 Oven lamp It will light when oven is operating or door is opened 6 Oven door with 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 TOUCH CONTROL PANEL 1 6 5 4 2 10 11 12 9 7 8 3 NOTE The directed features are disa bled after one minute when the oven is not in us...

Page 8: ...table motor the cooling fan motor and the high voltage components are de energized the oven lamp remains on and the digital read out displays the time still remaining in the cook cycle when the door was opened 7 The monitor switch electrically monitors the operation of the secondary interlock switch and primary interlock relayandismechanicallyassociatedwiththedoorsothat it will function in the fol...

Page 9: ...CH H V RECTIFIER MAGNETRON SECONDARY INTERLOCK 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 120V AC 60 Hz OVEN LAMP TURN TABLE MOTOR FAN MOTOR MONITOR SWITCH H V RECTIFIER MAGNETRON SECONDARY INTERLOCK SWITCH TTM OL FM MONIT...

Page 10: ...ACING 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 even...

Page 11: ... 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 the pr...

Page 12: ... 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 cook cycle Oven goes into a cook cycle but extremely uneven heating is pro duced in oven load food Oven does not cook properly when programmed for Cooking Power P 50 mode Operates properly on Cooking P HI HIGH mode Oven goes into COMPU DEFROST but food i...

Page 13: ...O EXTREME 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 thermoc...

Page 14: ...ly 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 block it open 3 Discharge high voltage capacitor 4...

Page 15: ...y interlock switch 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 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 capacit...

Page 16: ... microwave ovens proper maintenance 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 powe...

Page 17: ... 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 case cabinet 6 Reconnect the power supply cord after the outer case is installed 7 Run the oven and ...

Page 18: ...Y1 on the control unit with an A C voltmeter The meter should indicate 120 volts if not check oven circuit RY1 and RY2 Relay Test These relays are operated by D C voltage Check voltage at the relay coil with a D C voltmeter during the microwave cooking operation DC voltage indicated Defective relay DC voltage not indicated Check diode which is connected to the relay coil If diode is good control u...

Page 19: ...cord after the outer case is installed 9 Run the oven and check all functions 2 Followthetroubleshootingguidegivenbelow ifindicatordoesnotlightupafterabovecheckandrepairs 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 le...

Page 20: ...d passed back to the LSI through P41 P43 P44 P45 and AN0 to perform the function that was re quested Control Unit Control unit consists of LSI ACL circuit indicator circuit power source circuit relay circuit buzzer circuit synchro nizing signal circuit and back light circuit 1 ACL This circuit generates a signal which resets the LSI to the initial state when power is supplied 2 Indicator Circuit T...

Page 21: ...ched a corresponding signal will be input into P44 23 P43 IN Signal similar to P45 When either G10 line on key matrix is touched a corresponding signal will be input into P43 24 INT0 IN Signal synchronized with commercial power source frequency This is the basic timing for time processing of LSI 25 P41 IN Signal similar to P45 When either G9 line on key matrix is touched a corresponding signal wil...

Page 22: ...ignal applied to touch key section A pulse signal is input to P41 P43 P44 and P45 terminal while one of G2 line keys on key matrix is touched 40 P20 OUT Key strobe signal Signal applied to touch key section A pulse signal is input to P41 P43 P44 and P45 terminal while one of G1 line keys on key matrix is touched 41 48 P17 P10 OUT Terminal not used 49 50 P07 P06 OUT Terminal not used 51 72 SEG21 SE...

Page 23: ...that is equivalent to the oven door being closed Connect an external power source to the power input terminal of the touch control panel then it is possible to check and repair the controls of the touch control panel it is also possible to check the sensor related controls of the touch control panel by using the dummy resistor s 3 Servicing Tools Toolsrequiredtoservicethetouchcontrolpanelassembly ...

Page 24: ... 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 signs of arcing etc Carry out...

Page 25: ...nt 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 SIDE TERM...

Page 26: ... with soft cloth not to scratch LSI UNIT NOTE Handle the LSI unit carefully so that there is no excessive force applied to the ribbon connection 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 material in four corners 4 Where the corners have been snipped off bend cor...

Page 27: ...acket which supports the shaft of the fan motor on the flat table 3 Apply the screw lock tight into the hole for shaft of the fan blade 4 Install the fan blade to the shaft of fan motor by pushing thefanbladewithasmall lightweight ballpeenhammer or rubber mallet CAUTION Do not hit the fan blade strongly when installed because the bracket may be disfigured Make sure that the fan blade rotates smoot...

Page 28: ... in the door should be less than 0 5mm 2 The door sensing switch and secondary interlock switch interrupt the circuit before the door can be opened 3 Monitor switch contacts close when door is opened 4 Re install outer case and check for microwave leakage around door with an approved microwave survey meter Refer to Microwave Measurement Procedure DOOR REPLACEMENT REMOVAL 1 Disconnect the power sup...

Page 29: ...ce pressed toward cavity face plate 4 Check for microwave leakage 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 Ther...

Page 30: ...ven light socket POWER TRANSFORMER COM NO NOTE The neutral WHT GRY wire must be connected to the terminal with N mark on the power supply cord RED WHT BRN RED WHT WHT ORG WHT RED BLK RED BLU 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 ORG BLU GRN ORG ORG RY2 RY1 PRIMARY INTERLO...

Page 31: ...1 C 3 C 5 C 9 C 4 C 6 C 8 C 1 C 7 C 2 A 2 NO NO B 1 COM COM D1 S1NB10 T1 AC AC GND VR INT BUZZER MICRO BROWNER NC DOOR OVEN LAMP TURNTABLE MOTOR FAN MOTOR CN C 9PIN LEAD WIRE HARNESS OVEN LAMP TURNTABLE MOTOR FAN MOTOR MICRO DOOR SENSING SWITCH CN A RY1 RY2 a b c d J1 VRS1 SP1 PKM22EPT C1 2200µ 25v 10G471K B 2 CN B ...

Page 32: ...R9 4 7k R8 4 7k R7 4 7k R10 15k R3 4 7k R41 15k R90 15k J16 J17 4 7k J15 4 7k J13 4 7k J11 4 7k 1 25 64 41 1 24 25 40 65 80 J14 J12 J10 Q1 2SA1037AK IC1 IXA019DR Q30 DTA143EKA Q20 DTA143EKA Q22 DTA123JKA D40 MA152WA D20 MA152WA Q21 DTD143EKA Q10 DTA143EKA Q2 2SA1037AK LD1 LD2 LD3 LD4 R4 560 1 2w VR INT BUZZER OVEN LAMP TURNTABLE MOTOR FAN MOTOR NC BROWNER MICRO NOTE IF NOT SPECIFIED 1 10W 5 DOOR S...

Page 33: ...1k R6 15k R9 4 7k R8 4 7k R7 4 7k R10 15k R3 4 7k R41 15k R90 15k J16 J17 4 7k J15 4 7k J13 4 7k J11 4 7k 1 25 64 41 1 24 25 40 65 80 J14 J12 J10 Q1 2SA1037AK IC1 IXA019DR Q30 DTA143EKA Q20 DTA143EKA Q22 DTA123JKA D40 MA152WA D20 MA152WA Q21 DTD143EKA Q10 DTA143EKA Q2 2SA1037AK LD1 LD2 LD3 LD4 R4 560 1 2w VR INT BUZZER OVEN LAMP TURNTABLE MOTOR FAN MOTOR NC BROWNER MICRO NOTE IF NOT SPECIFIED 1 10...

Page 34: ...1 2 3 A B C D E F G H A B C D E F G H CN B CN C OL TTM FM SP1 RY1 RY3 RY2 MICRO BROWNER VH AC OM DU OM OM DU DU 1 7 4 F 3 AC SW GREEN 1 1 1 1 2 2 9 2 SH B D3 D4 C1 XA P S D2 J1 D1 VRS1 T1 CN A SH A DIP Figure S 5 Printed Wiring Board of Power Unit ...

Page 35: ...10 1 AG RY1 2 RRLY A114DRE0 J Relay DU12D1 1PR M 2 AN SP1 RALM A014DRE0 J Buzzer PKM22EPT 1 AG T1 RTRNPB013MRE0 M Transformer 1 AK T1 RTRNPA110DRE0 J Transformer Interchangeable 1 AP VRS1 RH VZB001MRE0 M Varistor 470ND 10D 1 AB VRS1 RH VZA032DRE0 J Varistor 10G471K Interchangeable 1 AE 3 2 FPNLCB278MRK0 M Control panel frame with key unit R 410DK 1 AY 3 2 FPNLCB279MRK0 M Control panel frame with k...

Page 36: ...arness 1 AF 6 2 FW VZB168MRE0 M Main wire harnes 1 AU 6 3 TLABBB007MRE0 M Cavity hole cover 1 AA 6 4 FROLPB025MRK0 M Turntable support 1 AN 6 5 NTNT A095WRE0 M Turntable tray 1 AN 6 6 TCAUAB037MRR0 M Monitor caution label 1 AA 6 7 TCAUAB038MRR0 M DHHS Screw caution label 1 AB 6 8 TINSEB216MRR0 M Operation manual R 410DK R 410DW 1 AD 6 8 TINSEB217MRR0 M Operation manual R 408DW 1 AD 6 9 QW QZB016MR...

Page 37: ...A B C D E F G H OVEN AND CABINET PARTS 2 3 4 7 6 7 1 5 4 6 4 8 4 9 6 3 6 5 6 4 2 1 7 6 1 12 4 10 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 11 7 5 6 6 1 7 1 6 4 5 1 14 7 9 7 7 7 9 7 7 ...

Page 38: ... 4 5 1 2 3 6 4 5 1 2 3 A B C D E F G H A B C D E F G H Actual wire harness may be different from illustration 6 9 6 2 6 1 3 5 3 5 3 2 1 3 3 3 4 3 5 3 1 3 2 3 2 2 3 2 3 5 1 5 1 2 5 1 1 5 3 5 4 5 5 5 2 CONTROL PANEL PARTS DOOR PARTS ...

Page 39: ...KING AND ACCESSORIES DOOR PROTECTION SHEET PLASTIC BAG PACKING CASE TOP PAD ASSEMBLY INTO THE OVEN CAVITY 6 5 TURNTABLE TRAY 6 4 TURNTABLE SUPPORT 6 8 OPERATION MANUAL TRAY PACK BOTTOM PAD ASSEMBLY TRAY HOLDER None Replaceable items ...

Page 40: ...38 R 408DW R 410DK R 410DW Notes ...

Page 41: ...39 R 408DW R 410DK R 410DW Notes ...

Page 42: ...HT 1999 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 recording orotherwise withoutpriorwrittenpermission of the publisher ...

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