Sharp R-380D Service Manual Download Page 31

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R-380D

Figure S-1. Pictorial Diagram

HIGH VOLTAGE

CAPACITOR

HIGH VOLTAGE

FUSE

H.V.

RECTIFIER

HIGH VOLTAGE COMPONENTS

OVEN LAMP

AND SOCKET

MAGNETRON

TURNTABLE

MOTOR

POWER

TRANSFORMER

GRY

RED

GRY

BLK

WHT

YLW

WHT

BLK

RED

ORG

Black Mark

WHT

RED

WHT

THERMAL

CUT-OUT (MG)

NOISE FILTER

FAN MOTOR

MONITOR

RESISTOR

THERMAL

CUT-OUT (OVEN)

BLK

ORG

RED

GRY

WHT

BLK

BLU

BRN

POWER

SUPPLY

CORD

EARTH

NEUTRAL

LIVE

G / Y

WHT

RED

NOTE:

Neutral (WHT) wire must

be connected to the

terminal with black mark

on the oven light socket.

COM.

MONITOR

SWITCH

COM.

N.O.

N.C.

STOP

SWITCH

2ND. LATCH

SWITCH

1ST. LATCH

SWITCH

COM.

RED

ORG

YLW

BLK

YLW

RED

GRN

GRY

WHT

BLK

RED

GRY

WHT

GRY

WHT

YLW

ORG

RY2

RY1

SP1

CN-A

CN-B

CN-C

CN-A

CONTROL UNIT

(POWER UNIT)

(Lower)

(Upper)

(Oven side)

(Cabinet side)

GRN

RED

CN-B

GRN

(CPU UNIT)

CN-F

CN-C

CN-G

BLK

AH SENSOR

RED

WHT

CN-F

Summary of Contents for R-380D

Page 1: ... SEQUENCE 4 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 CASSEROLE SOUP PIZZA POWER LEVEL LESS STOP CLEAR INSTANT COOK START CLOCK TIMER RICE SENSOR IN...

Page 2: ...R 380D ...

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: ... 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 HELP pad SENSOR INSTANT REHEAT pads SENSOR COOK pads EXPRESS DEFROST pad EASY DEFROST pad SLOW COOK pad MORE LES pads NUMBER pads POWER LEVEL pad CLOCK pad TIMER pad STOP C...

Page 5: ...selected INSTANT COOK START PAD Press once to cook for 1 minute on HIGH or increase by 1 minute multiples each time this pad is pressed during cooking Press to start the oven after setting pro grammes See note HELP PAD Press to select auto start child lock demonstration modes or info on pads Press to get cooking information SENSOR INSTANT REHEAT PADS Press once to rehaet 1 of 6 popular menus See N...

Page 6: ...2nd latch switch and stop switch are made open The oven lamp remains on even if the oven door is opened after the cooking cycle has been interrupted because the relay RY1 stays closed Shown in the display is the remaining time 6 MONITOR SWITCH CIRCUIT The monitor switch is mechanically controlled by oven door and monitors the operation of the 1st and 2nd latch switches 6 1 When the oven door is op...

Page 7: ... 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 microwaveenergyisproducedandfirststageisstarted 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 or touch STOP CLEAR pad 4 When the sensor detects...

Page 8: ...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 9: ...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 10: ...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 ap pears Oven or any electrical parts does not stop when cooking time is 0 or STOP CLEAR pad is touched Oven seems to be operating but little or no heat is produced in oven l...

Page 11: ... 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 ap...

Page 12: ...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 13: ...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 14: ...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 15: ...eplacement 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 touching a number pad two figures or more are displayed c When touching the pads sometimes a pad produces no signal 2 Control ...

Page 16: ...elay 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 CONNECTED COMPONENTS RY1 APPROX 25 0V D C Oven lamp Turntable motor Cooling fan motor RY2 APPROX 24 0V D C Power transformer CARRY OUT 4R CHECK...

Page 17: ...e 6 Reconnect the oven to the power supply and check the sensor cook operation proceed as follows 6 1 Fill approximately 200 milliliters 7 2 oz of tap water in a 1000 milliliter measuring cup 6 2 Place the container on the center of tray in the oven cavity 6 3 Close the door 6 4 Touch PIZZA pad once 6 5 The control panel is in automatic sensor operation 6 6 The display will start to count down the...

Page 18: ...d by LCD driver IC3 3 Power Source Circuit This circuit generates voltages necessary in the con trol 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 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...

Page 19: ...N9 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 signal is input to AN9 AN10 AN11 P41 and P42 terminal while one of G1 line keys on key matrix is touched 12 X1 IN Connected to GND 13 X2 OUT Terminal not used 14 VSS IN Power source voltage 5 0V VC voltage of power source circuit input 15 OSC...

Page 20: ...12 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 converter power source voltage The power source voltage to drive the A D converter in the LSI Connected to GND 91 AN0 IN Used for initial balancing of the bridge circuit absolute humid...

Page 21: ... on in such a way as to change the resistance values in parallel with R107 R111 of IC2 Changing the resistance values results in that there is the same potential at both F 3 terminal of the absolute humidity sensor and AN0 terminal of the LSI The voltage of AN1 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 th...

Page 22: ...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 23: ...to OVEN PARTS CABINET PARTS CONTROL PANEL PARTS DOOR PARTS when carrying out any of the following removal procedures WARNING FOR WIRING To prevent an electric shock take the following manners 1 Before wiring 1 Disconnect the power supply 2 Open the door and wedge the door open 3 Discharge the high voltage capacitor and wait for 60 seconds 2 Don t let the wire leads touch to the following parts 1 H...

Page 24: ...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 25: ... 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 26: ...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 27: ...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 28: ... 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 29: ...formicrowaveovensmustbeusedfortesting 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 such...

Page 30: ... RY 2 2ND LATCH SWITCH NOISE FILTER MONITOR RESISTOR 0 8 20W EARTH BLU BRN 230 240V 50Hz 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 F1 F2 F3 AH SENSOR 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 31: ... 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 GRY WHT BLK RED GRY WHT 2 1 GRY WHT YLW ORG RY2 RY1 SP1 CN A CN B C...

Page 32: ...00µ 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 C 12PIN LEAD WIRE HARNESS LED GND VC VA INT VR BUZZER MICRO NC NC DOOR SENSING SWITCH OVEN LAMP TURNTABLE MOTOR FAN MOTOR AC AC MICRO DOOR SENSING 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 NO ...

Page 33: ...32kD R11 15k J10 J11 4 7k J13 4 7k J15 4 7k J17 4 7k J12 J14 J16 D90 MA152WA Q30 DTA143EKA Q11 DTA143EKA Q20 DTA143EKA Q21 DTA123JKA D20 1SS355 D41 1SS355 IC2 BA4558 IC2 4 6 5 8 7 LD10 LD19 LD18 LD17 LD11 LD12 LD16 LD15 LD14 LD13 R90 330 1w R94 10k CF1 CST4 00MGW E E D C B A D C B A R92 1 8kF 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 ...

Page 34: ...EG4 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 IXA044DR 26 50 R134 15k R132 33k R133 510k R120 4 7k R121 4 7k R122 4 7...

Page 35: ...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 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 5 Printed Wiring Board ...

Page 36: ...onnector CN A 1 AC 3 1B QCNCMA275DRE0 Connector CN B 1 AB 3 1C FW VZA232DRE0 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 Q1 2 VS2SB1238 3 Transistor 2SB1238 2 AA Q3 VSKRC24...

Page 37: ...R PARTS 5 1 FDORFA332WRT0 Door panel 1 BB 5 2 PSHEPA382WRE0 Sealer film 1 AH 5 3 GWAKPA754WRRZ Door frame 1 AS 5 4 HPNL A745WRRZ Door 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 1 AC 5 10 PCUSUA554WRPZ Cushion 1 AB 5 11 GCOVHA417WRFZ Choke cover 1 AG AHMISCELLANEOUS...

Page 38: ...5 4 24 7 6 7 2 1 18 7 6 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 4 25 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 4 26 7 1 4 21 ...

Page 39: ...E F G H A B C D E F G H Actual wire harness may be different from illustration 6 3 6 5 6 9 5 11 5 1 5 3 5 4 5 7 5 7 5 7 5 6 5 7 5 2 5 5 5 10 5 10 5 9 5 9 5 8 6 4 3 2 3 1 3 5 3 4 3 6 3 3 1 3 6 3 3 6 7 CONTROL PANEL PARTS MISCELLANEOUS DOOR PARTS ...

Page 40: ... H A B C D E F G H DOOR PROTECTION SHEET SPADPA204WRE0 TOP PAD ASSEMBLY FPADBA428WRKZ PLASTIC BAG SSAKHA034WRE0 Not replaceable items PACKING CASE SPAKCD442WREZ BOTTOM PAD ASSEMBLY FPADBA429WRKZ 6 2 TURNTABLE TRAY 6 8 INSTRUCTION BOOK PRINTING MATTER 6 1 TURNTABLE SUPPORT TRAY PACK SPADFA451WRE0 INTO THE OVEN CAVITY ...

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