Sharp R-1480 Service Manual Download Page 36 | Manualshive

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34

R-1480
R-1481
R-1482

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-1. Pictorial Diagram

HIGH

VOLTAGE

RECTIFIER

HIGH VOLTAGE

CAPACITOR

HIGH VOLTAGE

WIRE A

HIGH VOLTAGE COMPONENTS

POWER

TRANSFORMER

Power Supply

cord 120V 60Hz

1

2

3

WHT

GRN

BLK

WHT

GRN

BLK

CAVITY

THERMAL

CUT-OUT

MAGNETRON

TEMPERATURE

FUSE

WHT

RED

BLK

RED

BLK

FAN

MOTOR

TURNTABLE

MOTOR

GRY

ORG

WHT

ORG

ORG

RED

WHT

ORG

BLK

WHT

HOOD LAMPS

& SOCKETS

Blue

Marking

Blue Marking

OVEN LAMP & SOCKET

to Chassis Support

CN-E

GRY

WHT

WHT

WHT

BLU

WHT

WHT

WHT

BLK

SECONDARY

INTERLOCK

SWITCH

N.O.

N.C.

COM.

COM.

MONITOR

SWITCH

FUSE & HOLDER

N.O.

N.O.

GRN

RED

N.O.

COM.

DOOR SENSING SWITCH

CN-B

CN-E

CN-F

CN-E

CN-A

1

1

9

1

1

13

2

12

3
5

7

PRIMARY

INTERLOCK

RELAY

RY1

RY2

RY4

RY1

N.O.

RY1

COM.

RY2

N.O.

RY2

COM.

GRY

C100

T1

HOOD FAN MOTOR

STIRRER MOTOR

1

2

3

4

5

6

WHT

RED

YLW

BLU

BLK

WHT

RED

YLW

BLU

BLK

1

2

RED

GRN

1

2

3

4

5

6

7

YLW

WHT

BLK

RED

CN-A

W H T

G R Y

HOOD FAN

THERMAL

CUT-OUT

RED

WHT

RED

RED

RED

ORG

RED

ORG

GRN

to Right Base Plate

GRN

1

2

3

4

5

6

7

BLK

RED

ORG

WHT

8

9

ORG

CN-B

IC1

IC2

COM.

COM.

RY2:

CN-G

RY5

RED

BLK

RED

ORG

ORG

BLK

RED

WHT

WHT

RED

MAGNETRON

W H T

R E D

WHT

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Summary of Contents for R-1480

Page 1: ...RODUCT SPECIFICATIONS 4 GENERAL INFORMATION 4 OPERATION 6 TROUBLESHOOTING GUIDE 11 TEST PROCEDURE 12 TOUCH CONTROL PANEL ASSEMBLY 21 COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE 26 PICTORIAL DIAGRAM 34 CONTROL PANEL CIRCUIT 35 PRINTED WIRING BOARD 36 PARTS LIST 37 PACKING AND ACCESSORIES 42 S3807R1480X R 1480 R 1481 R 1482 OVER THE RANGE MICROWAVE OVEN MODELS SERVICE MANUAL SHARP CORPORATION Thi...

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 releasing oven to the owner BEFORE SERVICING Before servicing an operative unit perform a microwave emission check as per t...

Page 3: ...ge capacitor 4 Disconnect the leads to the primary of the power transformer 5 Ensure that these 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 ...

Page 4: ... 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 Cook...

Page 5: ...tive 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 out only by trained service personnel DANGER Certaininitialpartsareintentionallynotgroundedandpresent a risk of electrical shock only during servicing Service personnel Do not contact the following parts while the appliance is e...

Page 6: ...prox 30 of Full Power P 20 approx 20 of Full Power P 10 approx 10 of Full Power P 0 No power throughout the cooking time CUSTOM HELP pad BREAKFAST pad POPCORN pad SNACKS REHEAT pad COMPU DEFROST pad COMPU COOK pad Number selection pads POWER LEVEL pad KITCHEN TIMER CLOCK pad MINUTE PLUS pad TURNTABLE ON OFF pad START TOUCH ON pad WORK LIGHT pad NIGHT LIGHT pad FAN HI LO pad Oven Cavity Light 30W x...

Page 7: ...IAGRAM 1 Oven door with see through window 2 Door hinges 3 Stirrer cover 4 Turntable motor shaft 5 Oven lamp It will light when oven is operating or door is open 6 Door latches The oven will not operate unless the door is securely closed 7 Auto Touch control panel 8 Time display Digital display 99 minutes 99 seconds 9 Ventilation openings 10 Light Cover 11 Grease filters 12 Removable turntable The...

Page 8: ...play will clear and will appear COOKING CONDITION Program desired cooking time touching the NUMBER pads When the START pad is touched the following operations occur 1 The contacts of relays are closed and components connected to the relays are turned on as follows For details refer to Figure O 2 1 2 3 4 5 6 7 8 9 0 CUSTOM HELP 1 Coffee tea 2 Roll muffin fresh 3 Roll muffin frozen 4 Hot cereal 5 Sc...

Page 9: ...a short circuit through the monitor fuse secondary interlock switch and primary interlock relay RY2 causing the moni tor fuse to blow POWER LEVEL P 0 TO P 90 COOKING When Variable Cooking Power is programmed the 120 volts A C is supplied to the power transformer intermittently through the contacts of relay RY2 which is operated by the control unit within an interval second time base Microwave powe...

Page 10: ... filter RK 230 must be provided to filter the air before it leaves the oven _ AIR FLOW VENTILATION METHODS HOT AIR EXHAUST 1 VERTICAL VENTING For this venting method hot air rising from the conventional range below is drawn in by the hood fan motor through the grease filters at the right and left sides of the base cover up through the right and left sides of the oven cavity then discharged vertica...

Page 11: ... B7 B5 B3 B1 High Low A1 A3 B9 A7 A5 N O E1 E2 DOOR SENSING SWITCH SECONDARY INTERLOCK SWITCH 120 V AC 60 Hz HOOD LAMP HL HL RY3 RY1 RY2 PRIMARY INTERLOCK RELAY FM STM OL TTM HOOD FAN THERMAL CUT OUT HOOD CAPACITOR RY4 RY5 N C CAVITY THERMAL CUT OUT SSR MAGNETRON TEMPERATURE FUSE FUSE 20A TURNTABLE MOTOR FAN MOTOR STIRRER MOTOR MAGNETRON OVEN LAMP MONITOR SWITCH BLK WHT POWER TRANSFORMER HIGH VOLT...

Page 12: ...s channelled through the oven cavity to remove steam and vapors given off from the heating foods It is then exhausted through the exhausting air vents at the oven cavity HOOD FAN MOTOR The hood fan motor is a two speed single phase double pole induction type requiring a hood fan capacitor It is located outside the upper rear part of the oven cavity is to remove from around the oven hot air rising ...

Page 13: ...ly 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 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 ...

Page 14: ...n cook cycle But it does light when door is opened Fan motor does not operate Oven lamp and turntable motor operate Turntable motor does not operate Oven lamp lights and fan motor operate Oven does not go into cook cycle when 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 in...

Page 15: ... the temperature stabilizes Record the temperature of the water 2 Place the cup of water in the oven Operate oven at POWER 10 HIGH selecting more than 60 seconds cook time Allow the water to heat for 60 seconds measuring with a stop watch second hand of a watch or the digital read out countdown 3 Remove the cup from the oven and again measure the temperature making sure to stir the thermometer or ...

Page 16: ...ven 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 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 ...

Page 17: ...ing 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 F SECONDARY INTERLOCK SWITCH TEST H MONITOR SWITCH TEST G 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 Isolatetheswi...

Page 18: ...reconnect the wire lead to the monitor switch COM terminal and check the continuity of the monitor circuit 5 Reconnect all leads removed from components during testing 6 Reinstall the outer case cabinet 7 Reconnectthepowersupplycordafter the outer case is installed 8 Run the oven and check all functions Secondary Interlock Switch Monitor Switch Screw Driver Ohmmeter Black White White J HOOD THERMA...

Page 19: ... 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 other components and oven chassis by using insulation tape 6 After that procedure re connect the power supply cord 1 Key Unit NOTE 1 Disconnect the power supply cord and then remove outer case 2 Open the door and block i...

Page 20: ...NIT 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 If the display fails to clear when the STOP CLEAR pad is depressed first verify the flat ribbon cable is making good contact verify that the door sensing switch stop switch operates properly that is the contacts are closed when the door is closed and open wh...

Page 21: ...ood motor RY5 Approx 24 0V D C Hood motor HIGH LOW selection 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 Reconnect the power supply cord after the outer case is installed 14 Run the oven and check all functions...

Page 22: ... 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 other components and oven chassis by using insulation tape 6 After that procedure re connect the power supply cord 7 Follow the troubleshooting guide given below for repair STEPS OCCURRENCE CAUSE OR CORRECTION The rated AC volt...

Page 23: ...d the filament serves as cathode The Fluorescent Display has 8 digits 15 segments are used for displaying figures The touch control section consists of the following units as shown in the touch control panel circuit 1 Key Unit 2 Control Unit The principal functions of these units and the signals com municated among them are explained below Key Unit The key unit is composed of a matrix signals gene...

Page 24: ...2 OUT Terminal not used 17 P51 OUT Magnetron high voltage circuit driving signal To turn on and off the cook relay RY2 In P HI operation the signals holds L level during mi crowave cooking and H level while not cooking In other cook ing modes P 90 P 80 P 70 P 60 P 50 P 40 P 30 P 20 P 10 P 0 the signal turns to H level and L level in repetition according to the power level 18 P50 OUT Terminal not u...

Page 25: ...2 VSS IN Power source voltage 5V VC voltage of power source circuit input 33 P27 IN Signal coming from touch key When any one of G12 line keys on key matrix is touched a corresponding signal will be input into P27 When no key is touched the signal is held at L level 34 P26 IN Signal similar to P27 When any one of G11 line keys on key matrix is touched a corresponding signal will be input into P26 ...

Page 26: ...y strobe signal Signal applied to touch key section A pulse signal is input to P27 P24 terminal while one of G6 line keys on key matrix is touched 52 P04 OUT Segment data signal Signal similar to P13 Key strobe signal Signal applied to touch key section A pulse signal is input to P27 P24 terminal while one of G5 line keys on key matrix is touched 53 P04 OUT Segment data signal Signal similar to P1...

Page 27: ... 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 4 Servicing Tools Tools required to service the touch control panel assembly 1 Soldering iron 30W It is recommended to use a soldering ir...

Page 28: ...is bent or warped 5 There are defective parts in the door interlock system 6 There are defective parts in the microwave generating and transmission assembly 7 There is visible damage to the oven Do not operate the oven 1 Without the RF gasket Magnetron 2 If the wave guide or oven cavity are not intact 3 If the door is not closed 4 If the outer case cabinet is not fitted 3 Sharp edge Bottom plate O...

Page 29: ...CaseRemoval And proceed as follows 2 Open the door and block it open 3 Discharge high voltage capacitor 4 Remove one 1 screw holding the hood duct to the oven cavity front flange 5 Disconnect the stop switch harness from the chassis supportanddisconnectthewireleadsfromthefanmotor 6 Lift up the fan motor side of the hood duct 7 Disconnect filament leads of transformer from the magnetron and capacit...

Page 30: ...ENED SE CURELY 1 Disconnect the power supply cord remove the oven from wall and remove outer case Refer to procedure of RemovalofOvenfromWall and OutercaseRemoval 2 Open the door and block it open 3 Discharge high voltage capacitor 4 Disconnect the wire leads from the fan motor and the chassis support and release them from the holes of hood duct 5 Remove the one 1 screw holding the hood duct to th...

Page 31: ...al cut out cavity from the one slit of the oven cavity top plate 8 Disconnect the wire leads from the thermal cut out cavity 9 Now the thermal cut out cavity is free TEMPERATURE FUSE MAGNETRON REMOVAL 1 Disconnect the power supply cord and remove the oven from wall and remove outer case Refer to procedure of RemovalofOvenfromWall and OutercaseRemoval 2 Open the door and block it open 3 Discharge h...

Page 32: ...nd secure it by one canoe clip STIRRER COVER AND STIRRER FAN INSTALLATION 1 Disconnect the power supply cord 2 Remove one 1 screw holding the hood exhaust louver to oven cavity front flange 3 Remove the hood exhaust louver from the oven by pushingtherightandlefttabsofthehoodexhaustlouver Refer to procedure of HOOD EXHAUST LOUVER OVEN LAMP REMOVAL 1 Disconnect the power supply cord 2 Open the door ...

Page 33: ...nel Locator pin Clip F Clip E POSITIVE LOCK CONNECTOR NO CASE TYPE REMOVAL 1 Disconnect the power supply cord and remove the oven from wall and remove outer case Refer to procedure of RemovalofOvenfromWall and OutercaseRemoval 2 Open the door and block it open 3 Discharge high voltage capacitor 4 Push the lever of positive lock connector 5 Pull down on the positive lock connector CAUTION WHEN CONN...

Page 34: ... hinge pins from the upper and lower oven hinges 9 Now the door assembly is free Note When the individual parts are replaced refer to Door Disassembly DOOR ASSEMBLY RE INSTALL 1 Onre installingdoor insertthelowerovenhingetolower door hinge pin 2 Insert the upper oven hinge to the upper door hinge pin 3 Shut the door close the contacts of interlock switches 4 Make sure upper and lower oven hinges a...

Page 35: ...nts are as follows 6 Place door assembly on a soft cloth with latches facing up Note As the engaging part of choke cover and door frame are provided at 15 places do not force any particular part CHOKE COVER 7 Insert a putty knife thickness of about 0 5mm into the gap A between the choke cover and door stopper and between the choke cover and the door frame as shown Figure C 3 to free engaging parts...

Page 36: ...KET to Chassis Support CN E GRY WHT WHT WHT BLU WHT WHT WHT BLK SECONDARY INTERLOCK SWITCH N O N C COM COM MONITOR SWITCH FUSE HOLDER N O N O GRN RED N O COM DOOR SENSING SWITCH CN B CN E CN F CN E CN A 1 1 9 1 1 1 3 2 12 3 5 7 PRIMARY INTERLOCK RELAY RY1 RY2 RY4 RY1 N O RY1 COM RY2 N O RY2 COM GRY C100 T1 HOOD FAN MOTOR STIRRER MOTOR 1 2 3 4 5 6 WHT RED YLW BLU BLK WHT RED YLW BLU BLK 1 2 RED GRN...

Page 37: ...55 P54 P53 P52 P51 P50 P47 P46 P45 P44 P43 P42 INT1 P40 RESET P71 P70 XIN XOUT VSS C100 7µ 230v D2 D3 D4 a b c d 5 6 11 SSR1 C30 R31 4 7k DOOR SWITCH CF1 CST4 00MGW CLOCK KITCHEN TIMER STOP CLEAR POWER LEVEL MINUTE PLUS NIGHT LIGHT FAN HI LO TURN TABLE ON OFF CUSTOM HELP POPCORN BREAK FAST COMPU COOK COMPU DEFROST SNACKS REHEAT WORK LIGHT 1 7 2 8 3 9 4 0 5 6 D30 S101D01 13 3 2 3 2 1 4 10G471K C1 0...

Page 38: ...R81 R82 R70 R71 R72 R73 35 3 1 B B B B B E E E E B E E E E E E B B B B B Q30 Q20 Q40 Q3 R83 R78 D77 IC2 34 42 C3 4 3 5 6 1 3 5 7 1 1 7 2 9 1 7 5 3 1 9 R30 C110 R110 R3 Q26 SSR1 Q25 Q24 Q4 D30 Q28 Q1 IC1 J12 J13 J14 C72 C30 C8 C70 C71 C73 QKITPB027MRE0 R91 R92 R93 J6 J4 J2 J5 J7 J3 33 CN G CN E R20 D31 R8 C21 R31 40 43 C2 C9 C4 44 45 C1 C100 D2 D3 41 39 38 C20 RY2 J1 RY1 Q27 D26 D28 D27 CN B CN B H...

Page 39: ...ANGKB009MRY0 M Hood lamp glass assembly R 1480 1 AN 2 7 FANGKB010MRY0 M Hood lamp glass assembly R 1481 1 AM 2 7 FANGKB011MRY0 M Hood lamp glass assembly R 1482 1 AM 2 7 1 LANGQB016MRP0 M Hood lamp glass angle R 1480 1 AG 2 7 1 LANGQB020MRP0 M Hood lamp glass angle R 1481 1 AG 2 7 1 LANGQB027MRP0 M Hood lamp glass angle R 1482 1 AG 2 7 2 PGLSPB004MRE0 M Hood lamp glass 1 AH 2 8 PCOVPB064MRt0 M Bas...

Page 40: ... FPNLCB205MRK0 M Control panel sub assembly R 1480 1 AZ 3 2 FPNLCB211MRK0 M Control panel sub assembly R 1481 1 AZ 3 2 FPNLCB212MRK0 M Control panel sub assembly R 1482 1 AZ 3 2 1 FUNTKB153MRE0 M Key unit R 1480 1 AU 3 2 1 FUNTKB159MRE0 M Key unit R 1481 1 AU 3 2 1 FUNTKB160MRE0 M Key unit R 1482 1 AU 3 2 2 GMADIB030MRF0 M Display window 1 AF 3 3 XEPSD30P10XS0 M Screw 3mm x 10mm 5 AB OVEN PARTS 4 ...

Page 41: ...te 1 AC 6 5 TINSKB048MRR0 M Wall template 1 AB 6 6 QW QZB023MRE0 M High voltage wire A 1 AD 6 7 FW VZB145MRE0 M Main harness A 1 AU 6 8 TCAUAA025WRR0 M Caution label 2 AA 6 9 TCAUAB015MRR0 M Monitor caution label 1 AA 6 10 TCAUAB005MRR0 M DHHS caution label 1 AB 6 11 FW VZB149MRE0 M Stop switch harness 1 AM 6 12 PFIL B004MRE0 M Chacoal filter 1 AH 6 13 PFIL B002MRE0 M Grease filter 1 AF 6 14 PCLIC...

Page 42: ... 4 7 3 6 10 7 5 7 3 7 1 1 16 1 13 7 8 7 3 1 17 4 18 7 3 7 9 7 9 7 8 4 15 1 10 7 1 4 9 1 10 1 9 4 22 7 6 7 7 1 8 4 17 7 8 2 3 2 2 4 6 4 5 4 3 6 13 2 8 1 2 4 14 4 18 7 3 6 13 4 2 1 16 1 13 6 14 4 10 7 5 4 11 1 3 1 15 4 12 7 3 4 7 4 8 1 4 1 6 1 7 7 8 4 4 1 5 1 3 6 8 7 3 4 20 1 11 7 3 7 3 1 1 7 2 2 4 2 7 1 2 7 2 7 2 2 7 6 9 6 8 4 16 6 12 1 14 ...

Page 43: ... 2 3 A B C D E F G H A B C D E F G H 6 6 6 7 6 11 6 1 5 6 5 4 5 3 4 21 5 5 1 5 2 1 5 2 5 5 5 6 5 6 6 1 1 5 2 4 5 2 2 5 2 3 6 1 2 6 1 3 6 1 7 6 1 5 6 1 6 6 1 4 3 2 2 3 2 1 3 3 3 3 3 3 3 2 3 1 7 3 3 1E DOOR PARTS CONTROL PANEL PARTS MISCELLANEOUS ...

Page 44: ...ms or trans mitted in any form or by any means elec tronic mechanical photocopying record ing or otherwise without prior written per mission of the publisher GREASE FILTER x 2 6 13 INSTALL MATERIAL ASSEMBLY 6 1 6 2 6 3 OPERATION MANUAL WALL TEMPLATE INSTALLATION INSTRUCTION 6 4 TOP TEMPLATE 6 5 4 3 TURNTABLE TRAY TOP PAD SPADBB026MRE0 BOTTOM PAD SPADBB025MRE0 PACKING CASE WRAP COVER SSAKH0103MRE0 ...

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