Sharp R-350D Service Manual Download Page 30 | Manualshive

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R-350D

28

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

Figure S-3. CPU Unit Circuit

+

–

C-2

C-3

C-10

C-9

C-1

C-5

C-6

C-7

C-12

C-8

G 9

G10

G11

G12

G13

G14

G 8

54

3

2

1

0

MEAT

CLOCK

HELP

FROZEN

DINNER

STOP

CLEAR

VEGETABLES

POWER

LEVEL

LESS

PIZZA

PASTA

MEAL

DINNER

PLATE

TIMER

SOUP

PIE

BEVERAGE

RICE/

PASTA

EASY

DEFROST

EXPRESS

DEFROST

CASSEROLE

98

7

6

G 7

G 6

G 5

G 4

G 3

G 2

G 1

C-11

C-4

INT

GND

CPU UNIT

VC

LED

VR

VA

MICRO

DOOR

(BROWNER)

NOTE

NC

: IF NOT SPECIFIED, 1/10W

±

5%

BUZZER

OVEN LAMP

TURNTABLE

MOTOR

FAN MOTOR

IC1

IXA049DR

Indicator Circuit

( See Fig. S-4 )

C10 47

µ

/16v

C11 0.1

µ

/50v

C40

0.01

µ

/25v

C65 330pF/50v

C64 330pF/50v

C63 330pF/50v

C62 330pF/50v

C61 330pF/50v

C60 330pF/50v

C12

0.1

µ

/50v

C110

4.7k

C13

0.01

µ

/25v

C92 4.7k

C14

0.01

µ

/25v

C20 0.1

µ

/50v

ZD10

UDZ4.3B

R12

15k

R11

15k

(J10)

(J11)

4.7k

(J13)

4.7k

(J15)

4.7k

(J17)

4.7k

(J12)

(J14)

(J16)

Q30 DTA143EKA

Q11 DTA143EKA

Q20 DTA143EKA

Q21 DTA123JKA

D20 1SS355

D41 1SS355

LD10

LD19

LD18

LD17

LD11

LD12

LD16

LD15

LD14

LD13

CF1 CST4.00MGW

R78 270k

R79 270k

R77 270k

R76 270k

R75 270k

R74 270k

R41 15k

13

0

31

50

51

80

81

100

R68 15k

R69 15k

R70 15k

R71 15k

R72 15k

R73 15k

C93 4.7k

Q10 2SA1037AK

R10 1k

R80

1M

R66 15k

R65 15k

R64 15k

R63 15k

R62 15k

R61 15k

R60 15k

R67 15k

R40 4.7k

SEG35

AN10

AN11

AVSS

P10

P11

P12

P13

P14

P15

P16

P17

X 1

X 2

VSS

OSC2

OSC1

TEST

RES

P20

P21

P22

P23

P24

P25

P26

P27

P30

P31

P32

P33

P91

P90

P87

P86

P85

P84

P83

P76

P75

P74

SEG20

SEG5

SEG36

SEG37

SEG38

SEG39

SEG40

P40

P41

P42

IRQ0

AVCC

AN0

AN1

AN2

AN3

AN4

AN5

AN6

AN7

AN8

AN9

SEG4

SEG3

SEG2

SEG1

COM1

COM2

COM3

COM4

VCC

V 0

V 1

V 2

V 3

VSS

CVCC

P37

P36

P35

P34

SEG19

SEG18

SEG17

SEG16

SEG15

SEG14

SEG13

SEG12

SEG11

SEG10

SEG9

SEG8

SEG7

SEG6

P82

P81

P80

P77

INSTANT

COOK

START

KEY UNIT

MORE

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Summary of Contents for R-350D

Page 1: ... FUNCTION OF IMPORTANT COMPONENTS 5 SERVICING 6 TEST PROCEDURE 8 TOUCH CONTROL PANEL 14 COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE 18 MICROWAVE MEASUREMENT 24 WIRING DIAGRAM 25 PICTORIAL DIAGRAM 26 POWER UNIT CIRCUIT 27 CPU UNIT CIRCUIT 28 PRINTED WIRING BOARD 29 PARTS LIST 30 DINNER PLATE PASTA MEAL FROZEN DINNER CASSEROLE SOUP PIE PIZZA POWER LEVEL LESS MORE STOP CLEAR INSTANT COOK START CLO...

Page 2: ...R 350D ...

Page 3: ...d attached Never look into an open waveguide or antenna while the device is energized 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...

Page 4: ...59 Timer 0 99 minutes 99 seconds Microwave Power for Variable Cooking Repetition Rate HIGH Full power throughout the cooking time MEDIUM HIGH approx 70 of Full Power MEDIUM approx 50 of Full Power MEDIUM LOW approx 30 of Full Power LOW approx 10 of Full Power INSTANT ACTION pads EXPRESS DEFROST pad EASY DEFROST pad NUMBER pads POWER LEVEL pad TIMER CLOCK pad STOP CLEAR pad INSTANT COOK START pad S...

Page 5: ...f oven during cooking press twice to can cel cooking programme POWER LEVEL PAD Press to select microwave power setting If not pressed HIGH is au tomatically selected INSTANT COOK START PAD Press to start the oven after setting programmes Press once to cook for 1 minute on HIGH or increase in 1 minute increments each time this pad is pressed during cooking See note HELP PAD Press to select auto sta...

Page 6: ... come to the following condition CONDITION DURING DOOR OPEN SWITCH CONTACT COOKING NOCOOKING 1st latch switch COM NO Closed Open 2nd latch switch COM NO Closed Open Monitor switch COM NC Open Closed Stop switch COM NO Closed Open The circuits to the power transformer fan motor and turntable motor are cut off when the 1st latch switch 2nd latch switch and stop switch are made open The oven lamp rem...

Page 7: ...rs given off from the heating foods It is then ex hausted through the exhausting air vents at the oven cavity NOISE FILTER The noise filter prevents the radio frequency interference that might flow back in the power circuit DOOR OPEN MECHANISM The door is opened by pulling the door refer to the Figure D 1 Figure D 1 Door Open Mechanism 1ST LATCH SWITCH 2ND LATCH SWITCH AND STOP SWITCH 1 When the o...

Page 8: ...carry out 3D checks and reconnect the leads to the primary of the power trans former REMEMBER TO CHECK 4R 1 Reconnect all leads removed from components during testing 2 Replace the outer case cabinet 3 Reconnect the supply 4 Run the oven Check all functions Microwave ovens should not be run empty To test for the presence of microwave energy within a cavity place a cup of cold water on the oven tur...

Page 9: ...rop erly when STOP CLEAR pad is touched Oven lamp does not light at door opened Display ap pears Oven does not start when the START pad is touched Dis play appears Oven lamp does not light Dis play appears Fan motor does not operate Display appears Turntable motor assembly does not operate Display appears Oven or any electrical parts does not stop when cooking time is 0 or STOP CLEAR pad is touche...

Page 10: ...is as follows Room temperature T0 around 20 C Power supply Voltage Rated voltage Water load 1000 g Initial temperature T1 10 1 C Heating time 38 sec Mass of container mc 330 g T2 Final Temperature P 110 x T 0 55 x mc T2 T0 38 Measuring condition 1 Container The water container must be a cylindrical borosilicate glass vessel having a maximum material thickness of 3 mm and an outside diameter of app...

Page 11: ...ned a Primary winding approx 1 0 Ω b Secondary winding approx 87 Ω c Filament winding less than 1Ω If the reading obtained are not stated as above then the power transformer is probably faulty and should be replaced CARRY OUT 4R CHECKS C HIGH VOLTAGE RECTIFIER ASSEMBLY TEST HIGH VOLTAGE RECTIFIER TEST CARRY OUT 3D CHECKS Isolate the high voltage rectifier assembly from the HV circuit The high volt...

Page 12: ...e Table Terminal Connection of Switch Plunger Operation COM to NO COM to NC COM Common terminal Released Open circuit Short circuit NO Normally open terminal Depressed Short circuit Open circuit NC Normally close terminal If incorrect readings are obtained make the necessary switch adjustment or replace the switch CARRY OUT 4R CHECKS CARRY OUT 3D CHECKS Disconnect the leads from the terminals of t...

Page 13: ...switch s and the fuse M10A CARRY OUT 4R CHECKS CAUTION ONLY REPLACE FUSE M10A WITH THE CORRECT VALUE REPLACEMENT I BLOWN FUSE M10A J NOISE FILTER TEST CARRY OUT 3D CHECKS Disconnect the leads from the terminals of the noise filter Using an ohmmeter check between the termi nals as described in the following table MEASURING POINT INDICATION OF OHMMETER Between N and L Open circuit Between terminal N...

Page 14: ... and Key Unit and also the Control Unit is divided into two units CPU Unit and Power Unit and troubleshooting by unit replacement is described according to the symptoms indicated 1 Key Unit Note Check key unit ribbon connection before replacement The following symptoms indicate a defective key unit Replace the key unit a When touching the pads a certain pad produces no signal at all b When touchin...

Page 15: ... and exam ine the transformer with a tester for the presence of layer short circuit check the primary coil resistance If any ab normal condition is detected replace the defective parts CARRY OUT 4R CHECKS TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST N RELAY TEST O PROCEDURES TO BE TAKEN WHEN THE FOIL PATTERN ON THE PRINTED WIRING BOARD PWB IS OPEN Remove the outer case and check voltage between...

Page 16: ...te when power is supplied 2 Indicator Circuit This circuit consists of 40 segments and 16 common electrodes using a Liquid Crystal Display The Liquid Crystal Display LCD is drived by LCD driver IC3 3 Power Source Circuit Thiscircuitgeneratesvoltagesnecessaryinthecontrol unit from the AC line voltage In addition the synchronizing signal is available in order to compose a basic standard time in the ...

Page 17: ...l applied to touch key section A pulse signal is input to AN9 AN10 AN11 P41 and P42 terminal while one of G3 line keys on key matrix is touched 10 P16 OUT Key strobe signal Signal applied to touch key section A pulse signal is input to AN9 AN10 AN11 P41 and P42 terminal while one of G2 line keys on key matrix is touched 11 P17 OUT Key strobe signal Signal applied to touch key section A pulse signa...

Page 18: ...al not used 87 P41 IN Signal similar to AN10 When either G13 line on key matrix is touched a corresponding signal will be input into P41 88 P42 IN Signal similar to AN10 When either G12 line on key matrix is touched a corresponding signal will be input into P42 89 IRQ0 IN Signal synchronized with commercial power source frequency This is the basic timing for time processing of LSI 90 AVCC IN A D c...

Page 19: ...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 therefore it is possible to check and repair the controls of the touch control panel while keeping it TOUCH CONTROL PANEL SERVICING apart from the oven proper in this case you must short both ends of the door sensing switch on PWB of the touch control pan...

Page 20: ...ron Highvoltagetransformer and Oven cavity 3 Sharp edge Bottom plate Oven cavity Waveguide flange Chassis support and other metallic plate 4 Movable parts to prevent a fault Fan blade Fan motor Switch Open button 3 Do not catch the wire leads in the outer case cabinet 4 Insert the positive lock connector certainly until its pin is locked And make sure that the wire leads should not come off even i...

Page 21: ...he two 2 screws 2 Re install the magnetron to waveguide flange with the four 4 screws 3 Insertthetwo 2 tabsofthechassissupporttotheoven cavity front plate and back plate 4 Re install the chassis support to oven cavity front plate oven cavity rear plate magnetron and fan duct with the five 5 screws 5 Reconnect the wire leads to the magnetron Refer to PICTORIAL DIAGRAM 6 Re install outer case and ch...

Page 22: ... Remove the magnetron and the chassis support from thewaveguide referringto MAGNETRONREMOVAL 4 Release the snap of the main wire harness from the fan duct 5 Remove one 1 screw holding the fan duct assembly to the oven cavity 6 Release the main wire harness from the hole of the fan duct 7 Release the fan duct from the waveguide flange 8 Release the fan duct assembly from the oven cavity 9 Removethe...

Page 23: ...nd tight the screw 3 Connectthebrownandbluewireleadsofpowersupply cord to the noise filter correctly referring to the Pictorial Diagram 4 Hold the the wire leads of the main wire harness and the erath wire of the power supply cord with the one 1 purse lock 5 Re install outer case and check that the oven is operating properly 1ST LATCH SWITCH 2ND LATCH SWITCH STOP SWITCH AND MONITOR SWITCH REMOVAL ...

Page 24: ...thechokecoveranddoorframeasshown in Figure C 6 to free engaging parts 4 Pry the choke cover by inserting a putty knife as shown Figure C 6 5 Release choke cover from door panel 6 Now choke cover is free 7 Release two 2 pins of door panel from two 2 holes of upper and lower oven hinges by lifting up 8 Now door panel with door frame is free from oven cavity Figure C 6 Door Disassembly 9 Remove the f...

Page 25: ... 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 This function does not require that door be air tight moisture condensation tight or light tight Therefore occasional appearance of moisture light or sensing of gentle warm air movement around oven door is not abnormal and do not of the...

Page 26: ...dformicrowaveovensmustbeusedfortesting 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 15ml of water initially at 20 5 C in the centre of the oven tray The water container should be a low form of 600 ml beaker with inside diameter of approx 8 5cm and made of an electrically non conductive material suc...

Page 27: ... CUT OUT 125 C OVEN RY 2 2ND LATCH SWITCH MONITOR RESISTOR 0 8 20W EARTH BLU BRN G Y FUSE M10A N L LINE CROSS CAPACITOR 0 068µ AC250V NOISE SUPPRESSION COIL LINE BYPASS CAPACITOR 0 0022µ AC250V LINE BYPASS CAPACITOR 0 0022µ AC250V NOISE FILTER 230 240V 50Hz POWER TRANSFORMER MAGNETRON H V RECTIFIER H V FUSE 0 75A CAPACITOR 1 07µ AC2300V TURNTABLE MOTOR FAN MOTOR OVEN LAMP STOP SWITCH MONITOR SWITC...

Page 28: ...OR RESISTOR THERMAL CUT OUT OVEN BLK ORG RED GRY WHT BLK BLU BRN POWER SUPPLY CORD EARTH NEUTRAL LIVE G Y N L WHT RED NOTE Neutral WHT wire must be connected to the terminal with black mark on the oven light socket COM MONITOR SWITCH COM COM N O N O N C STOP SWITCH 2ND LATCH SWITCH 1ST LATCH SWITCH COM NO RED ORG YLW BLK YLW RED GRN GRN GRY WHT BLK RED GRY WHT 2 1 GRY WHT YLW ORG RY2 RY1 SP1 IC1 S...

Page 29: ...0µ 35v C2 1000µ 35v C4 10µ 35v 1SS270A 1SS270A D1 D4 11ES1 D6 R5 4 7k R3 390 1 2w R2 510 1w R6 3 3k Q2 2SB1238 SP1 PKM22EPT RY1 RY2 Q3 KRC243M CN C 12PIN LEAD WIRE HARNESS LED GND VC VA INT VR BUZZER MICRO NC NC STOP SWITCH OVEN LAMP TURNTABLE MOTOR FAN MOTOR AC AC MICRO STOP SWITCH OVEN LAMP TURNTABLE MOTOR FAN MOTOR C10 C 2 C 3 C 1 C 4 C 9 C 5 C 6 C 7 C 8 C11 C12 A 2 B 2 B 1 NO NO COM COM ...

Page 30: ...v ZD10 UDZ4 3B R12 15k R11 15k J10 J11 4 7k J13 4 7k J15 4 7k J17 4 7k J12 J14 J16 Q30 DTA143EKA Q11 DTA143EKA Q20 DTA143EKA Q21 DTA123JKA D20 1SS355 D41 1SS355 LD10 LD19 LD18 LD17 LD11 LD12 LD16 LD15 LD14 LD13 CF1 CST4 00MGW R78 270k R79 270k R77 270k R76 270k R75 270k R74 270k R41 15k 1 30 31 50 51 80 81 100 R68 15k R69 15k R70 15k R71 15k R72 15k R73 15k C93 4 7k Q10 2SA1037AK R10 1k R80 1M R66...

Page 31: ...M2 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 IXA044DR 26 50 R134 15k R132 33k R133 510k R120 4 7k R121 4 7k R122 4 7k R123 4 7k R124 4 7k R125...

Page 32: ... G H A B C D E F G H Figure S 5 Printed Wiring Board DIP F SW R3 SP1 R2 E B R1 C4 C2 C5 RY2 RY1 VRS1 P S T1 RY3 CN D D6 D1 D4 D8 D2 D3 D20 D5 R4 Q2 Q3 B B E E R6 D9 D7 J2 J1 D10 R5 ZD1 1 2 C3 C1 CN C CN A CN B SH B SH A RED GREEN 1 1 1 1 2 3 2 12 ...

Page 33: ...ZA232DRE0 12pin lead wire CN C 1 AE C1 RC KZA087DRE0 Capacitor 0 1 uF 50V 1 AA C2 VCEAB31VW108M Capacitor 1000 uF 35V 1 AF C3 RC KZA087DRE0 Capacitor 0 1 uF 50V 1 AA C4 5 VCEAB31VW106M Capacitor 10 uF 35V 2 AA D1 4 VHD11ES1 1 Diode 11ES1 4 AB D5 8 VHD1SS270A 1 Diode 1SS270ATA 4 AA Q2 VS2SB1238 3 Transistor 2SB1238 1 AA Q3 VSKRC243M 3 Transistor KRC243M 1 AB R2 VRS B13AA511J Resistor 510 ohm 1W 1 A...

Page 34: ...or screen 1 AR 5 5 LSTPPA193WRFZ Latch head 1 AE 5 6 MSPRTA187WRE0 Latch spring 1 AC 5 7 XCPSD40P08000 Screw 4mm x 8mm 6 AA 5 8 PCUSUA461WRP0 Cushion 1 AB 5 9 PCUSUA553WRPZ Cushion 2 AC 5 10 PCUSUA554WRPZ Cushion 2 AB 5 11 GCOVHA417WRFZ Choke cover 1 AG AHMISCELLANEOUS 6 1 FROLPA079WRK0 Turntable support 1 AQ 6 2 NTNT A079WRE0 Turntable tray 1 AR 6 3 FW VZB792WREZ Main wire harness 1 AT 6 4 FW VZB...

Page 35: ... 4 18 1 11 4 14 4 2 6 4 7 6 1 12 7 1 7 5 1 7 1 8 4 10 4 16 1 6 7 1 2 3 2 3 7 6 7 6 7 6 4 23 7 6 1 9 4 6 1 3 1 2 1 17 1 15 7 7 7 6 4 9 1 16 7 2 1 13 7 3 4 8 4 4 4 15 7 6 7 6 1 4 4 7 4 11 7 4 7 1 4 18 7 6 4 19 4 22 4 12 6 2 6 1 4 1 7 6 2 4 4 20 7 3 1 5 7 1 4 5 2 2 7 1 4 3 7 3 1 1 1 1 7 1 1 14 7 3 7 3 7 6 1 5 6 6 4 17 7 1 4 21 ...

Page 36: ...2000SHARP CORP 7S0 730E Printed in Australia CONTROL PANEL PARTS MISCELLANEOUS DOOR PARTS PACKING AND ACCESSORIES DOOR PROTECTION SHEET SPADPA204WRE0 TOP PAD ASSEMBLY FPADBA428WRKZ PLASTIC BAG SSAKHA068WREZ Not replaceable items PACKING CASE SPAKCD422WREZ BOTTOM PAD ASSEMBLY FPADBA429WRKZ 6 2 TURNTABLE TRAY 6 8 INSTRUCTION BOOK PRINTING MATTER 6 1 TURNTABLE SUPPORT TRAY PACK SPADFA451WRE0 INTO THE...

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