Sharp R-1490 Service Manual Download Page 18

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R-1490
R-1491
R-1492

Figure S-2. Control Panel Circuit

–

A 7

VRS1

(J1)

D20

R110

R110 47 1/2w

C110 0.033

/250v

C110

D25

D26

D27

D28

D1-D4

11ES1

Q20

KRA101M

Q24

KRA101M

R20

1k 1/2w

RY4

RY5

RY1

RY2

RY3

Q25

KRA101M

Q26

KRA101M

Q28

KRA101M

Q30

KRA101M

Q27

KRC243M

Q40

KRA101M

MOTOR RUN

CAPACITOR

TURNTABLE

MOTOR

HOOD LAMP

HOOD THERMO

HOOD MOTOR

COM(H)

FAN MOTOR

OVEN LAMP

STIRRER MOTOR

MICRO

HIGH

LOW

COM

DTA123ES

C10 0.1

/50v

C73 330pF

C72 330pF

C71 330pF

C70 330pF

R10 3.3 1/2w

Note

Fluorescent display tube

VF1

MIX

CONV

COOK

LBS

TURNTABLE

OFF

HELP

1. 2 F

33. 32 F

VF2

IC2

(IZA495DR)

KRA101M

2SB1238

R3 680 1w

R4 510 1/2w

VCC

P30

P31

P32

P33

P34

P35

P36

P37

P00

P01

P02

P03

P04

P05

P06

P07

P10

P11

P12

P13

P14

P15

P16

P17

P20

P21

P22

P23

P24

P25

P26

P27

VEE

AVSS

VREF

AN7

AN6

AN5

AN4

AN3

AN2

AN1

AN0

P55

P54

P53

P52

P51

P50

P47

P46

P45

P44

P43

P42

INT1

P40

RESET

P71

P70

XIN

XOUT

VSS

C100

/230v

SSR1

C30

R31 4.7k

DOOR

SWITCH

CF1

CST4.00MGW

(A)

Custom

Help

Baked

Potato

Reheat

Frozen

entrees

Compu

Defrost

Clock

Kitchen

Timer

Stop

Clear

Compu

Cook

Power

Level

Night

Light

Fan

Hi / Lo

Turn

table

On / Off

Rice

Popcorn

Ground

meat

Fish/

seafood

Minute

Plus

Work

Light

172

Fresh

vegetables

Frozen

vegetables

(B)

(C)

(B)

AH SENSOR

(C)

D30

S101D01

10G471K

C1 0.1

/50v

C20 10

/35v

C21 0.1

/50v

R30 15k

D31

(J2)

(J4)

(J6)

(J3)

(J5)

(J7)

IC1

IZA877DR

(J15)

C3 0.1

/50v

0.1

/50v

SP40

C2 1000

/35v

C4 10

/35v

C6 10

/35v

ZD1 HZ6A3

ZD2 HZ16-1

ZD3 HZ5C2

ZD4

HZ4A2

4.7k

R1 4.3k 1/2w

R70 3.3k

R71 3.3k

D70

R72 3.3k

R73 3.3k

R76 3.3k

D71

R77 3.3k

D72

R78 3.3k

D73

R79 3.3k

D74

R80 3.3k

D752

R81 3.3k

D76

R82 3.3k

D77

R83 3.3k

R2 1.5k 1/4w

R40 3.3k

R100

330 1w

R91 100k

R92 100k

R93 100k

4 P1

5 P2

6 P3

7 P4

8 P5

9 P6

10 P7

11 P8

12 P9

13 P10

15 P11

16 P12

17 P13

19 P14

20 P15

22 1G

23 2G

24 3G

25 4G

26 5G

27 6G

28 7G

29 8G

A 1

A 3

A 5

E 1

G 1

G12

G11

G10

G 9

B 9

B 7

B 5

B 3

B 1

COM

N.O.

Start

Touch On

: IF NOT SPECIFIED 1/8w

: IF NOT SPECIFIED 1SS270A

: IF NOT SPECIFIED 0.01

F/16v

Summary of Contents for R-1490

Page 1: ...HOOTING GUIDE 8 TEST PROCEDURE 9 TOUCH CONTROL PANEL ASSEMBLY 11 CONPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE 13 PICTORIAL DIAGRAM 15 CONTROL PANEL CIRCUIT 16 PARTS LIST 17 PACKING AND ACCESSORIES 22 S4808R1490X R 1490 R 1491 R 1492 MODELS SERVICE MANUAL SHARP CORPORATION This document has been published to be used for after sales service only The contents are subject to change without notice Th...

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: ...n hazard 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 out only by trained service personnel DANGER Certain initial parts are inten...

Page 6: ...30 approx 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 COMPU DEFROST pad COMPU COOK pad SENSOR COOKING pad Number selection pads POWER LEVEL pad KITCHEN TIMER CLOCK pad MINUTE PLUS pad TURNTABLE ON OFF pad STOP CLEAR pad START TOUCH ON pad WORK LIGHT pad NIGHT LIGHT pad FAN HI LO pad Oven Cavity Light 30W x 1 In...

Page 7: ... The receptacle should be located inside the cabinet directly above the Microwave Oven Hood system mounting location CONTROL PANEL 3 Pronged Plug Grounded Receptacle Box Grounding Pin 3 Pronged Receptacle 1 2 3 4 5 6 7 8 9 0 Power Level Kitchen Timer Clock Minute Plus Turntable On Off Stop Clear Start Touch On Work Light Night Light Fan Hi Lo Compu Cook Compu Defrost Rice Popcorn Reheat Fish seafo...

Page 8: ...ng Sequence 1 Touch one of the INSTANT SENSOR pads NOTE The oven should not be operated on INSTANT SENSOR immediately after plugging in the unit Wait two minutes before cooking on INSTANT SENSOR 2 The coil of shut off relays RY1 and RY3 are energized the oven lamp turntable motor and cooling fan motor are turned on but the power transformer is not turned on 3 Afterabout32seconds thecookrelay RY2 i...

Page 9: ...GRN HOOD MOTOR B7 B5 B3 B1 High Low A1 A3 B9 A7 A5 N O F1 F2 F3 E1 E2 DOOR SENSING SWITCH SECONDARY INTERLOCK SWITCH 120 V AC 60 Hz HOOD LAMP HL HL RY3 RY1 RY2 PRIMARY INTERLOCK RELAY SSR FM STM OL TTM HOOD FAN THERMAL CUT OUT HOOD CAPACITOR RY4 RY5 N C MAGNETRON TEMPERATURE FUSE FUSE 20A TURNTABLE MOTOR FAN MOTOR STIRRER MOTOR MAGNETRON OVEN LAMP MONITOR SWITCH BLK WHT AH SENSOR POWER TRANSFORMER...

Page 10: ...s 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 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 Disconn...

Page 11: ...Compu Defrost Fish seafood Frozen entrees Power Level Turn Table On Off Work Light Night Light Fan Hi Lo Stop Clear Start Touch On Minute Plus Kitchen Timer Clock G 1 G 2 G 3 G 4 G 5 G 6 G 7 G 8 G 9 G10 G11 G12 Q AH SENSOR TEST Checking the initial sensor cooking condition WARNING The oven should be fully assembled before following procedure 1 The oven should be plugged in at least two minutes bef...

Page 12: ...s follows 9 1 Fill approximately 200 milliliters 7 2 oz of tap water in a 1000 milliliter measuring cup 9 2 Place the container on the center of tray in the oven cavity 9 3 Close the door 9 4 Touch reheat pad once and touch the Start pad 9 5 The control panel is in automatic Sensor operation 9 6 The display will start to count down the remaining cooking time and the oven will turn off automaticall...

Page 13: ... and ensure that the oven works properly DESCRIPTION OF LSI LSI IZA877DR The I O signals of the LSI IZA877DR are detailed in the following table Pin No Signal I O Description NOTE For additional informations of LSI please refer back to the R 1480 base model Service Manual 5 AN7 IN Used for initial balancing of the bridge circuit absolute humidity sensor This input is an analog input terminal from ...

Page 14: ...thermistors and two resistors R1 and R2 The output of the bridge circuit is to be amplified by the operational amplifier Each thermistor is supplied with a current to keep it heated at about 150 C 302 F the resultant heat is dissipated in the air and if the two thermistors are placed in different humidity conditions they show different degrees of heat conductivity leading to a potential difference...

Page 15: ...ty are not intact 3 If the door is not closed 4 If the outer case cabinet is not fitted 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 Switch lever Open button 3 Do not catch the wire leads in the outer case cabinet 4 Insert the positive lock connector until its pin is locked and make sur...

Page 16: ...minal hole of the oven lamp socket with a small flat type screw driver 18 Now the oven lamp socket is free 19 Release the harness of the AH sensor assembly from three 3 wire holders of the hood duct 20 Remove two 2 screws holding the AH sensor assembly to the hood duct 21 Now the AH sensor assembly is free Oven lamp socket Terminal Wire lead Terminal hole Flate type small screw driver ...

Page 17: ...port CN E CN F 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 GRN RED N O COM DOOR SENSING SWITCH AH SENSOR CN B CN E CN F CN E CN A 1 1 1 3 1 9 1 2 12 3 5 7 PRIMARY INTERLOCK RELAY RY1 RY2 RY4 RY1 N O RY1 COM RY2 N O RY2 COM GRY C100 T1 1 2 RED WHT 3 HOOD FAN MOTOR STIRRER MOTOR 1 2 3 4 5 6 WHT RED YLW BLU BLK WHT RED YLW BLU ...

Page 18: ...UT VSS C100 7µ 230v D2 D3 D4 a b c d 5 6 11 SSR1 C30 R31 4 7k DOOR SWITCH CF1 CST4 00MGW A A Custom Help Baked Potato Reheat Frozen entrees Compu Defrost Clock Kitchen Timer Stop Clear Compu Cook Power Level Night Light Fan Hi Lo Turn table On Off Rice Popcorn Ground meat Fish seafood Minute Plus Work Light 1 7 2 8 3 9 4 0 5 6 Fresh vegetables Frozen vegetables B C B AH SENSOR C D30 S101D01 13 3 2...

Page 19: ...B011MRY0 M Hood lamp glass assembly R 1492 1 AM 2 7 1 LANGQB016MRP0 M Hood lamp glass angle R 1490 1 AG 2 7 1 LANGQB020MRP0 M Hood lamp glass angle R 1491 1 AG 2 7 1 LANGQB027MRP0 M Hood lamp glass angle R 1492 1 AG 2 7 2 PGLSPB004MRE0 M Hood lamp glass 1 AH 2 8 PCOVPB064MRt0 M Base cover R 1490 1 AY 2 8 PCOVPB066MRt0 M Base cover R 1491 1 AY 2 8 PCOVPB067MRt0 M Base cover R 1492 1 AY CONTROL PANE...

Page 20: ...olid state relay 1 AG SP40 RALM A014DRE0 J Buzzer PKM22EPT 1 AG T1 RTRNPB014MRE0 M Transformer 1 AM VRS1 RH VZA032DRE0 J Varistor 10G471K 1 AE ZD1 VHEHZ6A3 1 J Zener diode HZ6A 3 1 AC ZD2 VHEHZ161 1 J Zener diode HZ16 1 1 AA ZD3 VHEHZ5C2 1 J Zener diode HZ5C 2 1 AA ZD4 VHEHZ4A2 1 J Zener diode HZ4A 2 1 AA 3 2 FPNLCB213MRK0 M Control panel sub assembly R 1490 1 AZ 3 2 FPNLCB214MRK0 M Control panel ...

Page 21: ...CFZK B131MRK0 M Installation material assembly 1 AM 6 1 1 LBSHC0040MRE0 M Grommet 1 AC 6 1 2 LX BZ0195WRE0 M Toggle screw 4 AC 6 1 3 LX MZ0001WRE0 M Cord holder 1 AC 6 1 4 XBRSD50P60000 M Screw 5mm x 60mm 2 AC 6 1 5 XOTSD40P12000 M Screw 4mm x 12mm 1 AA 6 1 6 XTSSD50P35000 M Screw 5mm x 35mm 6 AA 6 1 7 XWHSD50 16300 M Washer 2 AA 6 2 TINSEB177MRR0 M Installation instruction 1 AB 6 3 TINSEB181MRR0 ...

Page 22: ...5 7 1 1 16 1 13 7 8 7 3 7 3 1 17 7 9 7 9 7 8 4 15 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 23 4 11 1 3 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 6 16 7 10 6 16 1 18 1 14 7 3 4 18 7 3 1 15 ...

Page 23: ... 2 3 A B C D E F G H A B C D E F G H DOOR PARTS MISCELLANEOUS 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 CONTROL PANEL PARTS ...

Page 24: ...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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