Sharp R-1490 Service Manual Download Page 7 | Manualshive

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R-1490
R-1491
R-1492

Electrical Requirements
The oven is equipped with a 3-prong grounding plug. DO NOT UNDER ANY CIRCUMSTANCES CUT OR REMOVE THE
GROUNDING PIN FROM THE PLUG.
The power supply cord and plug must be connected to a separate 120 Volt AC, 60 Hz, 15 Amp. or more branch circuit, using
a grounded receptacle. 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/

seafood

Ground

meat

Fresh

vegetables

Frozen

entrees

Baked

potato

Frozen

vegetables

Custom

Help

S e n s o r C o o k i n g

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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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