Sharp R-409HK Page 9 Service Manual Download

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R-410HK
R-410HW
R-409HK

Figure O-2 Oven Schematic - Cooking Condition

Figure O-1 Oven Schematic - Off Condition

SCHEMATIC

NOTE: CONDITION OF OVEN

1. Door Closed

2. CLOCK APPEARS ON DISPLAY

SCHEMATIC

3. VARIABLE COOKING CONTROL "HIGH"

2. COOKING TIME PROGRAMMED

1. DOOR CLOSED

NOTE: CONDITION OF OVEN

4. "START" PAD TOUCHED

Note:* Indicates component

CAVITY

TEMPERATURE

FUSE

120VAC

60Hz

COM.

RED

WHT

BRN

WHT

ORG

RED

WHT

GRN

N.O.

CONTROL UNIT

C/T

FUSE

N.O.

(RY2)

COM.

DOOR

SENSING

SWITCH

TTM

TURN

TABLE

MOTOR

FAN

MOTOR

OVEN

LAMP

MONITOR

SWITCH

PRIMARY

INTERLOCK

SWITCH

POWER

TRANSFORMER

MAGNETRON

HIGH

VOLTAGE

CAPACITOR

ORG

WHT

SECONDARY

INTERLOCK

RELAY

ORG

BRN

ORG

RED

GRY

GND

WHT

SENSOR

(RY1)

OVEN

LAMP

RELAY

COM.

N.O.

HUMIDITY

COM.

N.C.

HIGH

VOLTAGE

RECTIFIER

ORG

CAVITY

TEMPERATURE

FUSE

120VAC

60Hz

COM.

RED

WHT

BRN

WHT

ORG

RED

WHT

GRN

N.O.

CONTROL UNIT

N.O.

(RY2)

COM.

DOOR

SENSING

SWITCH

TTM

TURN

TABLE

MOTOR

FAN

MOTOR

OVEN

LAMP

MONITOR

SWITCH

PRIMARY

INTERLOCK

SWITCH

POWER

TRANSFORMER

MAGNETRON

HIGH

VOLTAGE

CAPACITOR

ORG

WHT

SECONDARY

INTERLOCK

RELAY

ORG

BRN

ORG

RED

GRY

GND

WHT

SENSOR

(RY1)

OVEN

LAMP

RELAY

COM.

N.O.

HUMIDITY

COM.

N.C.

HIGH

VOLTAGE

RECTIFIER

ORG

C/T

FUSE

RED

Summary of Contents for R-409HK

Page 1: ... TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY INSIDE FRONT COVER BEFORE SERVICING INSIDE FRONT COVER WARNING TO SERVICE PERSONNEL 1 MICROWAVE MEASUREMENT PROCEDURE 2 FOREWORD AND WARNING 3 PRODUCT SPECIFICATIONS 4 GENERAL INFORMATION 4 OPERATION 6 TROUBLESHOOTING GUIDE 9 TEST PROCEDURE 10 TOUCH CONTROL PANEL 18 COMPONENTREPLACEMENTANDADJUSTMENTPROCEDURE 23 PICTORIALDIAGRAM 30 CPUUNITCI...

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: ...nter 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 Power ...

Page 5: ...ot 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 Certain initial parts are intentionally not grounded and present a risk of electrical shock only during servicing Service person nel Do not contact the following parts while the appliance is energized High Voltage Ca...

Page 6: ...ct SPECIFICATION ITEM DESCRIPTION Power Requirements 120 Volts 14 3Amperes 1700watts R 410HK HW 14 0 Amperes 1600 watts R 409HK 60 Hertz Single phase 3 wire grounded PowerOutput 1200 watts IEC 705 TEST PROCEDURE R 410HK HW 1100 watts IEC 705 TEST PROCEDURE R 409HK Operatingfrequencyof2450MHz CaseDimensions Width 21 21 32 Height 12 3 8 Depth 18 7 16 Cooking Cavity Dimensions Width 15 23 32 Height 9...

Page 7: ...he oven will not operate unless the door is securely closed 3 Removable turntable support 4 Removable turntable The turntable will rotate clockwise or counterclockwise 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 Wave guide cover 1...

Page 8: ...premainson andthedigitalread outdisplaysthetimestillremainingin the cook cycle when the door was opened 7 The monitor switch electrically monitors the operation of theprimaryinterlockswitchandsecondaryinterlockrelay andismechanicallyassociatedwiththedoorsothatitwill function in the following sequence 1 When the door opens from the closed position the secondary interlock relay RY2 and primary inter...

Page 9: ...OTOR OVEN LAMP MONITOR SWITCH PRIMARY INTERLOCK SWITCH POWER TRANSFORMER MAGNETRON HIGH VOLTAGE CAPACITOR ORG WHT SECONDARY INTERLOCK RELAY ORG BRN ORG ORG RED RED GRY GRY GND WHT F3 F2 F1 SENSOR RY1 OVEN LAMP RELAY COM N O HUMIDITY COM N C HIGH VOLTAGE RECTIFIER ORG CAVITY TEMPERATURE FUSE 120VAC 60Hz COM RED RED WHT WHT WHT WHT BRN WHT WHT WHT ORG RED WHT WHT GRN N O B2 B1 CONTROL UNIT N O RY2 C...

Page 10: ...il to open the C T fuse blows simultaneously with closing of the monitor switch contacts CAUTION BEFORE REPLACING A BLOWN C T FUSE TEST THE DOOR SENSING SWITCH SEC ONDARY INTERLOCK RELAY RY2 RELAY RY1 PRIMARY INTERLOCK SWITCH AND MONITOR SWITCH FOR PROPER OPERA TION REFER TO CHAPTER TEST PROCE DURE NOTE C T FUSE AND MONITOR SWITCH ARE REPLACED AS AN ASSEMBLY TURNTABLE MOTOR The turntable motor rot...

Page 11: ...ssembly 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 primary of the power tra...

Page 12: ...hen 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 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 b...

Page 13: ...EME 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 ...

Page 14: ...r flow 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 C T FUSE TEST 1 Disconnect the power supply cord and then remove outer case 2 Open the door and block it op...

Page 15: ...on and the door is closed the cooling fan turntable and oven light will be activated by RY1 SECONDARYINTERLOCKRELAY RY2 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 Disconnecttwo 2 wireleadsfromthemaletabterminalsoftheSecondaryInterlockRelay Checkthe state of the relay contacts using a ohmmeter The relay contac...

Page 16: ...ads a certain pad produces no signal at all b When touching a number pad two figures or more are displayed c When touching the pads sometimes a pad produces no signal I TOUCH CONTROL PANEL ASSEMBLY 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 Before performing this test make sure that the primary interlock...

Page 17: ...n and check all functions 4 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 check all functions TEST PROCED...

Page 18: ...ective RELAY SYMBOL OPERATIONAL VOLTAGE CONNECTED COMPONENTS RY1 Approx 12V D C Oven lamp Turntable motor Cooling fan motor RY2 Approx 12V 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 Recon...

Page 19: ...ct the power supply cord after the outer case is installed M FOIL PATTERN ON THE PRINTED WIRING BOARD TEST RY2 VRS1 L1 J1 a b c d 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 capa...

Page 20: ...e LSI to the initial state when power is supplied 2 IndicatorCircuit This circuit consists of 22 segments and 3 common electrodes using a Liquid Crystal Display 3 Power Source Circuit This circuit generates voltages necessary in the control unit from the AC line voltage In addition the synchronizing signal is available in order to compose a basic standard time in the clock circuit Symbol Voltage A...

Page 21: ...uare waveform voltage is delivered to the RY1 driving circuit and RY2 control circuit 17 P51 OUT Terminal not used 18 P50 OUT Magnetron high voltage circuit driving signal To turn on and off 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 p...

Page 22: ...s input to P70 P71 P41 P45 P47 and AN3 terminal while one of G7 line keys on key matrix is touched 35 P25 OUT Key strobe signal Signal applied to touch key section A pulse signal is input to P70 P71 P41 P45 P47 and AN3 terminal while one of G6 line keys on key matrix is touched 36 P24 OUT Key strobe signal Signal applied to touch key section A pulse signal is input to P70 P71 P41 P45 P47 and AN3 t...

Page 23: ...20 52 SEG 20 SEG10 62 SEG 10 SEG21 51 SEG 21 73 VCC IN Power source voltage GND 0V 74 VREF IN A D converter power source voltage GND 0V The power source voltage to drive the A D converter Connected to GND 75 AVSS IN A D converter power source voltage 5 0V The power source voltage to drive the A D converter 76 COM3 OUT Terminal not used 77 COM2 OUT Common data signal Connected to LCD signal COM1 78...

Page 24: ...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 1 Solderingiron 30W Itisrecommendedtouseasolderingironwithagrounding terminal 2 Oscilloscope Singlebeam frequencyrang...

Page 25: ... 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 26: ...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 27: ...ol panel frame 3 Placethekeyunitfirmlytothecontrolpanelframe by rubbing with soft cloth not to scratch 1 Disconnect the power supply cord and remove outer case 2 Open the door and block it open 3 Discharge high voltage capacitor 4 Remove the oven lamp from the oven lamp socket 5 Pullthewireleadsfromtheovenlampsocketby pushing the terminal hole of the oven lamp socket with the small flat type screw...

Page 28: ...ake sure that the LCD sheet and the liquid crystal display in good condition 3 Remove the backing paper from the new graphic sheet 4 Adjust the upper edge and right edge of the graphic sheet to the large depression on the surface of the control panel frame 5 Attach the graphic sheet to the control panel frame by rubbing with a soft cloth not to scratch 6 Reinstall the control panel frame to the ov...

Page 29: ...bracket 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 smo...

Page 30: ...oosen 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 Figure C 3 Latch Switch Adjustments hook pushing and pulling upper portion of door toward the o...

Page 31: ... emission limitation standards After any service make sure of the following 1 Door latch heads smoothly catch latch hook through latch holes and that latch head goes through center of latch hole 2 Deviation of door alignment from horizontal line of cavity face plate is to be less than 1 0mm 3 Doorispositionedwithitsfacepressedtowardcavityface plate 4 Checkformicrowaveleakagearounddoorwithanapprove...

Page 32: ...nnected to the terminal with blue mark on the oven 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 PNK GRN GRN to Oven cavity WHT WHT WHT WHT BLUE MARK RED WHT CAVITY TEMP FUSE FAN MOTOR C T FUSE RED RED WHT GRY WHT GRN ORG ORG RY2 RY1 SECONDARY INTERLOCK RELAY T1 1 2 POWE...

Page 33: ... P70 XIN XOUT VSS P27 P26 P25 P24 P23 P22 P21 P20 VL3 COM0 COM1 COM2 COM3 AVSS VREF VCC SEG0 SEG1 SEG2 SEG3 SEG4 SEG5 SEG6 SEG7 CST4 00MGW R67 15K R66 15K R65 15K R64 15K R63 15K R62 15K R61 15K R60 15K R80 1M R110 15K G F POWER LEVEL CLEAR KEY UNIT DEFROST MINUTE PLUS REHEAT R78 R77 R76 R75 R74 C64 C63 C62 C61 C60 R68 15K R69 15K R70 15K R71 15K R72 15K P70 P71 P41 P45 G CPU UNIT R41 15K R40 4 7K...

Page 34: ...P20 VL3 COM0 COM1 COM2 COM3 AVSS VREF VCC SEG0 SEG1 SEG2 SEG3 SEG4 SEG5 SEG6 SEG7 CST4 00MGW R67 15K R66 15K R65 15K R64 15K R63 15K R62 15K R61 15K R60 15K R80 1M R110 15K G F POWER LEVEL CLEAR KEY UNIT DEFROST MINUTE PLUS REHEAT R78 R77 R76 R75 R74 C64 C63 C62 C61 C60 R68 15K R69 15K R70 15K R71 15K R72 15K P70 P71 P41 P45 G CPU UNIT R41 15K R40 4 7K C4 00 01uF 25V POWER UNIT DOOR COM Q20 DTA143...

Page 35: ... B C D E F G H Figure S 5 Printed Wiring Board of Power Unit RY1 RY2 E C B E C B E C B VRS1 L1 D7 D3 P S D4 C2 D1 C1 D2 R8 R7 R2 R4 Q3 Q4 SP1 T1 D6 DZ1 WH 2 WH 2 LED Q2 D5 D8 D30 1 2 J1 J6 J2 J5 R5 C4 C5 CN B CN F 1 2 3 C10 DIP CHIP SIDE R90 J3 D31 R3 R6 E B 1 1 2 2 Q1 ...

Page 36: ... 409HK 1 AE 3 2 HPNLFB007MRF0A M Control panel frame R 410HW 1 AE 3 3 PSHEPB122MRR0 M Key unit R 410HK 1 AG 3 3 PSHEPB121MRR0 M Key unit R 410HW 1 AG 3 3 PSHEPB114MRR0 M Key unit R 409HK 1 AG 3 4 JBTN B151MRF0A M Open button R 410HK R 409HK 1 AD 3 4 JBTN B155MRF0A M Open button R 410HW 1 AF 3 5 MSPRTA050WRE0 M Open button spring 1 AA 3 6 XEPSD30P06XS0 M Screw 3mm x 10mm 5 AA OVEN PARTS 4 1 LBNDKB0...

Page 37: ... wire harnes 1 AU 6 3 FROLPB025MRK0 M Turntable support 1 AN 6 4 NTNT A108WREZ M Turntable tray 1 AM 6 5 TCAUAB045MRR0 M Monitor caution label 1 AA 6 6 TCAUAB038MRR0 M DHHS Screw caution label 1 AB 6 7 TINSEB355MRK0 M Operation manual R 410HK HW 1 AD 6 7 TINSEB356MRK0 M Operation manual R 409HK 1 AD 6 8 QW QZB016MRE0 M High voltage wire A 1 AC SCREWS NUTSANDWASHERS 7 1 LX BZA041WRE0 M Special scre...

Page 38: ... E F G H A B C D E F G H OVEN AND CABINET PARTS 2 3 4 7 6 6 1 5 4 6 4 8 4 9 6 4 6 3 2 1 7 5 1 10 4 10 7 2 7 2 4 3 1 11 1 8 7 3 7 5 7 5 7 6 4 2 7 4 1 9 1 3 1 4 7 1 1 7 1 7 4 4 7 1 4 1 1 1 1 2 2 2 2 2 2 2 2 2 7 4 7 4 4 11 7 4 6 5 1 6 4 5 1 12 7 4 7 7 7 4 7 7 1 6 ...

Page 39: ... B C D E F G H A B C D E F G H CONTROL PANEL PARTS 5 1 2 5 1 1 5 1 5 4 5 3 5 2 5 7 5 8 3 3 3 2 3 5 3 1 3 4 3 6 Actual wire harness may be different from illustration 6 8 6 2 6 1 Items 5 7 5 8 5 9 are not included with assembly 5 1 5 6 5 5 5 9 DOOR PARTS ...

Page 40: ... AND ACCESSORIES DOOR PROTECTION SHEET PLASTIC BAG PACKING CASE TOP PAD ASSEMBLY INTO THE OVEN CAVITY 6 4 TURNTABLE TRAY 6 7 OPERATION MANUAL BOTTOM PAD ASSEMBLY TRAY HOLDER 6 3 TURNTABLE SUPPORT ON TOP OF THE OVEN Non replaceable items ...

Page 41: ...39 R 410HK R 410HW R 409HK NOTES ...

Page 42: ...40 R 410HK R 410HW R 409HK NOTES ...

Page 43: ...41 R 410HK R 410HW R 409HK NOTES ...

Page 44: ...HT 2003 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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