Sharp R-420DK Скачать руководство пользователя страница 37

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-420DK

R-420DW

Figure S-3. CPU Unit Circuit For R-420DK/DW

C-4

C-2

C-9

C-3

C-10

C-1

C-5

C-8

C-12

C-11

F-1

F-2

F-3

G 9

G10

G11

G12

G13

G14

G 8

G 7

G 6

G 5

G 4

G 3

G 2

G 1

–

C-6

C-7

C1 0.1µ/50v

LD4

LD3

LD2

LD1

C3 0.1µ/50v

C4 10µ/35v

C10 47µ/16v

C11 0.1µ/50v

C40 0.01µ/25v

C65 330p/50v

C64 330p/50v

C63 330p/50v

C62 330p/50v

C61 330p/50v

C60 330p/50v

C91

0.015µ/25v

C12

0.1µ

/50v

C13

0.01µ

/25v

10µ

/35v

C20
0.1µ
/50v

C92

0.01µ

/25v

C93 0.01µ/25v

C90

0.1µ

/50v

C14

0.01µ

/25v

(J10)

(J11)

4.7K

(J13)

4.7K

(J15)

4.7K

R13

10K

R14

10K

R15

10K

(J12)

(J14)

ZD1

UDZ16B

ZD10

UDZ4.3B

R12.4k

1/4w

R5 4.7k

R96 3.57KD

R91 3.32KD

R12 15k

3.3k

1/4w

MA152WA

(D9-D10)

1SS355

x 2

D10

R93 360kF

R80

P26

S20

S19

S18

S17

S16

S15

S14

S13

S12

S11

S10

S 9

S 8

S 7

S 6

S 5

S 4

S 3

S 2

S 1

SEG0

SEG35

SEG34

SEG33

SEG32

SEG31

SEG30

SEG29

SEG28

SEG27

SEG26

SEG25

SEG24

SEG23

SEG22

SEG21

SEG20

SEG19

SEG18

SEG17

SEG16

SEG15

SEG14

SEG13

SEG12

SEG11

SEG10

SEG9

SEG8

SEG7

SEG6

SEG5

SEG4

SEG3

SEG2

SEG1

SEG0

COM0

COM1

COM2

S 0

VSS0

VLC2

VLC1

VLC0

BIAS

COM3

COM2

COM1

COM0

P27

P70

P71

P72

I C

X 2

X 1

VDD1

XT1

XT2

RESET

INTP0

INTP1

P02

P03

P04

P05

P110

P111

P112

P113

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 37.4kF

R100 150kF

R99 300k

R98 620k

R10 1k

R11 15k

R2 680 1/2w

R68 15k

R69 15k

R70 15k

R71 15k

R72 15k

R73 15k

R41 15k

R92 1.8kF

R90
330 1w

R94 10k R95 47k

R97 47k

100

CF1 CST4.00MGW

CHICKEN

PIECES

STEAKS/

CHOPS

RICE

MINUTE

PLUS

CHICKEN

BREAST

KITCHEN

TIMER

POWER

LEVEL

CUSTOM

HELP

CLOCK

START

BEVERAGE

STOP

CLEAR

BAKED

POTATOES

POPCORN

FROZEN

ENTREES

FRESH

VEGETABLES

FROZEN

VEGETABLES

REHEAT

SENSOR

FISH/

SEAFOOD

FROZEN

ROLLS &

MUFFINS

FRESH

ROLLS &

MUFFINS

GROUND MEAT

(SENSOR COOK)

GROUND MEAT

(COMPU DEFROST)

R4
27 1/4w

1SS355 x 2

D5 D6

Q3
KRC243M

Q30 DTA143EKA

Q20 DTA143EKA

D30 MA152WA

Q21 DTA123JKA

(Q22 DTA123JKA)

R3 510
1/2w

Q1 KTA1661

Q2 KTA1661

Q11
DTA143EKA

Q10
2SA
1037AK

D90
MA152WA

IC2 BA4558

5 6

7 8

1 2 3 4

GND

CPU UNIT

DOOR
SENSING
SWITCH

CN-F AH SENSOR

NOTE

: IF NOT SPECIFIED 1/10 ± 5%

INT

GND

MICRO

TOP
HEATER

BUZZER

OVEN LAMP
TURNTABLE
MOTOR
FAN MOTOR

IC1
IXA020DR

LIQUID CRYSTAL DISPLAY

KEY UNIT

COOK SENSOR

LBS

DEF HELP

Содержание R-420DK

Страница 1: ... 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 TROUBLESHOOTINGGUIDE 10 TESTPROCEDURE 11 TOUCHCONTROLPANEL 21 COMPONENTREPLACEMENTANDADJUSTMENTPROCEDURE 27 PICTORIALDIAGRAM 33 POWERUNITCIRCUIT 34 C...

Страница 2: ...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 Microwav...

Страница 3: ... 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 Reco...

Страница 4: ...he 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 P...

Страница 5: ...r 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 Capacitor Power Transf...

Страница 6: ...ion Pad 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 Authorized DHHS Rules CFR Title 21 Chapter 1 Subchapter J SPECIFICATION GENERAL INFORMATION GROUNDING INSTRUCTIONS This oven is equipped with a three prong grounding plug It must be plugged into a wall receptacle that is properly installed and gr...

Страница 7: ...CUT OR RE MOVE THE ROUND GROUNDING PRONG FROM THIS PLUG OVEN DIAGRAM 1 One touch door open button Push to open door 2 Door latches The 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 wind...

Страница 8: ...ble 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 follo...

Страница 9: ... of the SENSOR pads NOTE The oven should not be operated on sensor immediately after plugging in the unit Wait two minutes before cooking on SENSOR 2 The coil of shut off relay RY 1 is energized the turntablemotorareturnedon butthepowertransformer is not turned on 3 After about 16 seconds the cook relay RY 2 is energized The power transformer is turned on microwaveenergyisproducedandfirststageisst...

Страница 10: ... B1 B2 GRN POWER TRANSFORMER MONITOR FUSE 20A MAGNETRON TEMP FUSE CAPACITOR 1 0µF AC 2300V AH SENSOR SCHEMATIC 2 CLOCK APPEARS ON DISPLAY 3 VARIABLE COOKING CONTROL HIGH 2 COOKING TIME PROGRAMMED 1 DOOR CLOSED NOTE CONDITION OF OVEN 4 START PAD TOUCHED 120V AC 60 Hz OVEN LAMP TURN TABLE MOTOR FAN MOTOR MONITOR SWITCH H V RECTIFIER MAGNETRON SECONDARY INTERLOCK SWITCH TTM OL FM MONITOR FUSE 20A CAV...

Страница 11: ...G 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 d...

Страница 12: ...S 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 prima...

Страница 13: ...ycle Oven goes into a cook cycle but extremely uneven heating is produced in oven load food Oven does not cook properly when programmed for Cooking Power 5 mode Operates properly on Cooking Power 10 HIGH mode Oven goes into COMPU DEFROST but food is not defrosted well AH sensor does not end during sensor cooking condition Oven does not shut off after a cup of water is boiling by sensor cooking Ove...

Страница 14: ...TREME 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 thermocoupl...

Страница 15: ...he 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 A c...

Страница 16: ...terlock 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 capacitor 4...

Страница 17: ...rowave 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 power su...

Страница 18: ...ck 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 chec...

Страница 19: ...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 unit is defective RELAY SYMBOL OPERATIONAL VOLTAGE CONNE...

Страница 20: ...s 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 leads remain isolated from ot...

Страница 21: ... oz of tap water in 1000 millilitres measuring cup 3 Place the container on the center of tray in the oven cavity 4 Close the door 5 Touch REHEAT or REHEAT SENSOR pad once Now the oven is in the sensor cooking condition and SENSOR REHEAT will appear in the display 6 The oven will operate for the first 16 seconds without generating microwave energy NOTE ERROR will appear if the door is opened or ST...

Страница 22: ...ds push plunger of select switch for more than 3 seconds This condition is same as judgement by AH sensor 9 4 After approximately 3 seconds the display shows xx xx which is remaining cooking time and the display count down If the above is not the case the control unit is probably defective If the above is proper the AH sensor is probably defective 10 Disconnect the power supply cord and then remov...

Страница 23: ...me in the clock circuit Symbol Voltage Application VC 5V LSI IC1 4 Relay Circuit A circuit to drive the magnetron fan motor turntable motor and light the oven lamp 5 Buzzer Circuit The buzzer is responsive to signals from the LSI to emit audiblesounds keytouchsoundandcompletionsound 6 Synchronizing Signal Circuit The power source synchronizing signal is available in order to compose a basic standa...

Страница 24: ... and off shut off relay RY1 The square waveform voltage is delivered to the RY1 driving circuit and RY2 control circuit 18 P05 OUT Terminal not used 19 P110 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 G8 line keys on key matrix is touched 20 P111 OUT Key strobe signal Signal applied to touch key section A p...

Страница 25: ...nsor input This input is an analog input terminal from the AH sensor 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 P117 will be input into ANI6 through G1 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 s...

Страница 26: ...dard voltage for LCD 59 VSS0 IN Power source voltage 5 0V The power source voltage to the LSI is input to VSS0 terminal Connected toVC 60 95 S0 S35 OUT Segment data signal Connected to LCD The relation between signals are as follows LSI signal Pin No LCD Pin No LSI signal Pin No LCD Pin No S0 60 SEG 0 S18 78 SEG 18 S1 61 SEG 1 S19 79 SEG 19 S2 62 SEG 2 S20 80 SEG 20 S3 63 SEG 3 S21 81 SEG 21 S4 64...

Страница 27: ...ltage available at its AN1 terminal With this voltage given the switches SW1 to SW5 in the LSI are turned on in such a way as to change the resistance values in parallel with R107 R111 of IC2 Changing the resistance value results in that there is the same potential at both F 3 terminal of the absolute humiditysensorandAN0terminaloftheLSI Thevoltage of AN1 terminal will indicate about 16 seconds ab...

Страница 28: ... 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 1 Soldering iron 30W ...

Страница 29: ...NG 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 signs of arcin...

Страница 30: ...t 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 TERMI...

Страница 31: ...ft 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 corner area...

Страница 32: ...e the bracket may be disfigured Make sure that the fan blade rotates smooth after installation Make sure that the axis of the shaft is not slanted 5 Install the fan motor to 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 blo...

Страница 33: ...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 supply ...

Страница 34: ...ressed 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 Therefor...

Страница 35: ...ght 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 INTERLOCK REL...

Страница 36: ... T1 RY1 RY2 DOOR SENSING SWITCH 12PIN LEAD WIRE HARNESS CN B NC GND NC NC VR INT VA MICRO MICRO NC CN C CN A CN D AC DOOR SENSING SWITCH BUZZER OVEN LAMP FAN MOTOR TURNTABLE MOTOR OVEN LAMP FAN MOTOR TURNTABLE MOTOR D1 4 11ES1 GND VRS1 C2 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 ...

Страница 37: ...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 37 4kF R100 1...

Страница 38: ...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 ...

Страница 39: ...INET PARTS 2 1 GDAI B057MRP0 M Base plate 1 AR 2 2 GLEGPB004MRF0 M Foot 4 AB 2 3 GCABUB092MRP0 M Outer case cabinet R 420DK 1 AW 2 3 GCABUB088MRP0 M Outer case cabinet R 420DW 1 AV CONTROL PANEL PARTS 3 1 CPWBFB042MRU0 M Control unit 1 BL 3 1A QCNCMA446DRE0 J 2 pin connector CN A 1 AC 3 1B QCNCMA275DRE0 J 2 pin connector CN B 1 AB 3 1C FW VZB146MRE0 M 12Pin wire harness CN C 1 AG C2 VCEAB31VW108M ...

Страница 40: ...r frame assembly R 420DW 1 AP 5 1 1 LSTPPB021MRF0 M Latch head 1 AE 5 1 2 MSPRTA046WRE0 M Latch spring 1 AB 5 2 FDORFB062MRT0 M Door panel 1 AW 5 3 PSHEPB021MRE0 M Sealer film 1 AE 5 4 GCOVHB042MRF0 M Choke cover 1 AG 5 5 HPNL B087MRE0 M Door screen R 420DK 1 AK 5 5 HPNL B088MRE0 M Door screen R 420DW 1 AM MISCELLANEOUS 6 1 FW VZB125MRE0 M Stop switch harnnes 1 AF 6 2 FW VZB168MRE0 M Main wire har...

Страница 41: ...H OVEN AND CABINET PARTS 2 3 4 7 6 7 1 5 4 6 4 8 4 11 7 2 7 10 1 15 4 9 6 3 6 5 6 4 2 1 7 10 1 12 4 10 7 2 7 2 7 5 4 3 1 13 7 3 7 6 1 10 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 9 7 7 7 9 7 7 ...

Страница 42: ...3 6 4 5 1 2 3 A B C D E F G H A B C D E F G H CONTROL PANEL PARTS 5 1 5 1 2 5 1 1 5 3 5 4 5 5 5 2 DOOR PARTS MISCELLANEOUS 3 2 1 3 2 2 3 2 3 3 2 3 5 3 4 3 1 3 5 3 3 Actual wire harness may be different from illustration 6 9 6 2 6 1 ...

Страница 43: ...CESSORIES 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 SPADPB038MRE0 BOTTOM PAD ASSEMBLY TRAY HOLDER Non replaceable items ...

Страница 44: ...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 recording orotherwise withoutpriorwrittenpermission of the publisher ...

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