Sharp R-1482, R-1480 Signal to sound buzzer, Auto clear terminal, Signal coming from touch key

Page 25

R-1480

R-1481

R-1482

Pin No.

Signal

I/O

 

Description

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

22

P44

OUT

Terminal not used.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

23

P43

OUT

Signal to sound buzzer.

 

 

 

0.1 sec

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A: key touch sound.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

B: Completion sound.

 

 

 

 

 

 

 

2 sec

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C: When the temperature of the oven cavity reaches

B

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

the preset temperature in the preheating mode,

1 sec

 

 

 

 

 

1 sec

 

 

 

 

 

H: GND

 

 

 

or when the preheating hold time (30 minutes) is

C

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

L

 

 

 

elapsed.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

24

P42

IN

Terminal not used.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

25

INT1

IN

Signal to synchronize LSI with commercial power source frequency.

 

 

 

 

 

 

 

 

 

 

This is the basic timing for all real time processing of LSI.

 

 

 

 

 

 

 

 

 

 

 

 

 

H : GND

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

L (-5V)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

16.7 msec

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

26

P40

IN

Connected to VC.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

27

RESET

IN

Auto clear terminal.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Signal is input to reset the LSI to the initial state when power is applied. Temporarily set

 

 

 

to "L" level the moment power is applied, at this time the LSI is reset. Thereafter set at "H"

 

 

 

level.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

28-29

P71-P70

OUT

Terminal not used.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

30

XIN

IN

Internal clock oscillation frequency setting input.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The internal clock frequency is set by inserting the ceramic filter oscillation circuit with

 

 

 

respect to XOUT terminal.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

31

XOUT

OUT

Internal clock oscillation frequency control output.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Output to control oscillation input of XIN.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

32

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.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

35

P25

IN

Signal similar to P27.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

When any one of G10 line keys on key matrix is touched, a corresponding signal will be

 

 

 

input into P25.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

36

P24

IN

Signal similar to P27.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

When any one of G9 line keys on key matrix is touched, a corresponding signal will be input

 

 

 

into P24.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

37-40

P23-P20

OUT

Digit selection signal.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The relationship between digit signal and digit are as follows;

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Digit signal

Digit

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

H

 

 

 

P14

1st.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ß(60Hz)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

P15

2nd.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

L

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GND

 

 

 

P16

3rd.

P14

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VP

 

 

 

P17

4th.

P15

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

P20

5th.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

P16

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

P21

6th.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

P22

7th.

P17

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

P23

8th.

P20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(ß : INTO signal)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

P21

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Refer to the touch control panel circuit about the

P22

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

relation between signals and digits. Normally,

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

P23

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

one pulse is output in every synchronized signal

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(ß)period, and input to the grid of the fluorescent display.

23

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Contents Over the Range Microwave Oven Table of ContentsBefore Servicing Dont Touch Before Servicing When the testing is completedRequirements Microwave Measurement ProcedureLeakage test Over the Range Microwave Oven Sharp PLAZA, Mahwah1480 / R-1481 / R-1482 ForewordGeneral Information Product SpecificationDescription Grounding InstructionsOven Diagram Description of Operating Sequence OperationOFF Condition Cooking ConditionCompu Cook Power Level P-0 to P-90 CookingCompu Defrost Cooking Vertical Venting Ventilation Methods HOT AIR ExhaustAIR Flow Horizontal VentingFigure O-1. Oven Schematic-Off Condition Description and Function of Components Stirrer Motor Troubleshooting GuideHood Lamp Possible Case Defective Parts Procedure Letter Component Test Magnetron Assembly Test Test ProceduresMicrowave Output Power Power Transformer TestMagnetron Temperature Fuse Test Procedure Letter Component TestHigh Voltage Rectifier Test High Voltage Capacitor TestPrimary Interlock System Test Door Sensing Switch Secondary Interlock Switch TestMonitor Switch Test Primary Interlock Relay RY2Hood Thermal CUT-OUT Test Blown Monitor Fuse TestHood FAN Motor Test Before testing Touch Control Panel Assembly TestWHT 3 KEY Unit Test Weight 1ST Stage 2ND Stage 3RD Stage 4TH Stage Level Time Procedure Letter Component Test Relay TestFoil Pattern on the Printed Wiring Board Test Compu Defrost TestOccurrence Cause or Correction Procedure Component Test LetterSteps Occurrence Cause or Correction Touch Control Panel Assembly LSIIZA876DR Description of LSISignal coming from touch key Signal to sound buzzerSignal similar to P27 Digit selection signalSegment data signal Segment data signalsKey strobe signal Servicing Other PrecautionsShapes of Electronic Components Servicing of Touch Control PanelHood Exhaust Louver Removal Component Replacement and Adjustment ProcedureRe-install Power Transformer RemovalOuter Case Removal Hood FAN MOTOR, Hood Duct and Oven Lamp Socket RemovalHigh Voltage Rectifier and High Voltage Capacitor Removal Magnetron RemovalHood FAN Thermal CUT-OUT Removal Thermal CUT-OUT Cavity RemovalCooling FAN Motor Removal Temperature Fuse Magnetron RemovalRear View Control Panel ASSEMBLY, Control Unit and KEY Unit Removal Stirrer Cover and Stirrer FAN InstallationTurntable Motor Removal Stirrer Motor RemovalPositive lock connector Positive Lock Connector NO-CASE Type RemovalStep After adjustment, check the following Door ReplacementDoor Assembly Removal Door Assembly RE-INSTALLAfter any servicing, make sure of the following Door DisassemblyChoke Cover Door FrameFigure S-1. Pictorial Diagram Circuit BFB DIPParts marked * are used in voltage more than Parts ListElectric Parts Cabinet PartsDoor Parts Oven PartsMiscellaneous HOW to Order Replacement PartsSCREWS,NUTS and Washers Model NumberOven and Cabinet Parts Control Panel Parts Door Parts Miscellaneous Copyright 1998 by Sharp Corporation ALL Rights Reserved Packing and Accessories

R-1481, R-1482, R-1480 specifications

Sharp R-1480, R-1481, and R-1482 are popular countertop microwave ovens that exemplify innovation in home cooking technology. These models are designed to cater to modern culinary needs, combining functionality, efficiency, and user-friendly features.

The Sharp R-1480 stands out with its powerful 900 watts of cooking power, ensuring that meals are cooked evenly and thoroughly. This model includes a spacious 1.5 cubic feet capacity, allowing users to cook larger dishes without hassle. One of the most striking features of the R-1480 is its advanced Sensor Cooking technology. This intelligent feature automatically adjusts cooking time and power levels based on the type of food being prepared, delivering optimal results with minimal effort.

The R-1481 model shares many similarities with the R-1480 but introduces additional features that enhance convenience and usability. It also boasts a 900-watt power output and a 1.5 cubic feet interior. What sets the R-1481 apart is its impressive variety of pre-programmed settings. These settings simplify cooking tasks, giving users one-touch access to options for popular foods such as popcorn, pizza, and frozen vegetables. The auto defrost function is another advantage, allowing for quick thawing of meats and seafood based on weight.

Meanwhile, the Sharp R-1482 takes the features of the R-1481 a step further, adding a few unique characteristics. This model incorporates both microwave and grill functionality, allowing for versatile cooking options. Users can enjoy the benefits of grilling their favorite dishes for a perfect finish and flavor infusion. The R-1482 also includes a user-friendly control panel with a large LCD display, ensuring easy navigation through the cooking process.

Across these models, Sharp emphasizes safety and ease of use. The child lock feature provides peace of mind for families, while the easy-to-clean stainless steel interior promotes hygiene and longevity. All models include a turntable for even cooking and reheating, making it easier to prepare meals uniformly.

In conclusion, the Sharp R-1480, R-1481, and R-1482 microwave ovens combine advanced technology with practical features, catering to a diverse range of cooking needs. These models stand as a testament to Sharp’s commitment to quality and innovation in the kitchen, making them excellent choices for anyone seeking efficiency and versatility in their cooking appliances.
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