Figure O-1. Oven Schematic - Off Condition

R - 1 8 7 0

R - 1 8 7 1

SCHEMATIC

NOTE: CONDITION OF OVEN

1.DOOR CLOSED.

2.CLOCK APPEARS ON DISPLAY.

 

 

 

FUSE

 

 

MAGNETRON

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BLK

20A

 

 

TEMPERATURE FUSE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BLK

 

 

 

RED

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

COM.

 

 

BLK

 

BLK

 

 

BRN

 

BLK

 

 

CONTROL UNIT

 

 

 

 

 

 

 

 

 

RY1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BLK

 

 

PNK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

HOOD FAN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

THERMAL

 

C9

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CUT OUT

 

 

RY9

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RY2

 

 

 

 

BRN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RY3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BLKBLK

 

 

NOISE

C5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GRN

RESISTOR

 

RY10

 

 

 

RY6

RY5

 

 

RY4

 

RY7

RY1

 

 

 

 

 

 

BLU

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C7

 

 

 

 

 

 

 

 

 

 

 

 

 

WHT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

120 V AC. GND

BLK

PPL

HOOD

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CAPACITOR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

60 Hz

 

 

 

 

 

 

 

RY8

 

 

 

 

 

 

 

 

 

 

 

N.O.

COM.

COM.

N.O.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RY1

RY2

RY3

RY3

 

GRY

 

 

 

HOOD

A1

A3

C1

A5

 

B5

 

B3

 

 

B1

 

B7

YLW

BRN

BRN

PPL

 

E1

 

 

 

 

 

 

 

PNK

GRY

DAMPER MOTOR

BLU

 

RED

 

 

ORG

 

 

BLK

WHT RED

PNK

GRY

YLW

 

 

GRY

BRN

BRN

GRY

MOTOR

TURNTABLE MOTOR

 

 

 

YLW

 

 

 

 

 

GRY

 

 

 

WHTWHT

OVENLAMP

GRY

PPL HEATING ELEMENT

 

 

 

 

 

MOTOR

 

 

 

 

 

 

 

 

 

 

CONVECTION MOTOR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DM

 

 

 

TTM

 

 

 

 

 

 

 

 

DOOR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SENSING

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OL

 

 

 

SWITCH

 

BLU

 

 

REDRED

 

HL

HL

 

 

 

FAN

 

FM

 

 

 

 

CM

 

 

 

 

 

 

 

 

 

 

HOOD

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LAMP

 

 

 

 

 

 

 

 

 

WHT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

YLW

 

 

 

 

 

 

 

 

 

 

 

 

WHT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GRY SECONDARY

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

INTERLOCK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SWITCH

 

 

 

 

 

 

 

 

N.O.

RY2

AH SENSOR

RELAY

 

 

 

 

 

 

PRIMARY INTERLOCK

F1

F2

F3

 

MOTOR

 

 

 

 

E2

E5

E6

 

 

BLK

GRN

BLK

BLK

BRN

WHT

STIRRER

 

 

 

 

E3

E4

 

STM

 

 

 

 

 

 

 

 

 

DAMPER

 

 

 

THERMISTOR

SWITCH

 

 

 

 

 

 

 

WHT

 

MONITOR SWITCH

POWER

TRANSFORMER

BLK

BLK

CAPACITOR

MAGNETRON

 

HIGH VOLTAGE

 

BLK

0.9F

 

 

 

 

 

HIGH VOLTAGE

 

WHT

RECTIFIER

WHT

 

Figure O-1. Oven Schematic - Off Condition

SCHEMATIC

NOTE: CONDITION OF OVEN

1.DOOR CLOSED.

2.COOKING TIME PROGRAMMED.

3.START PAD TOUCHED.

 

 

 

FUSE

 

 

MAGNETRON

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BLK

20A

 

 

TEMPERATURE FUSE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RED

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

COM.

 

 

 

BLK

 

 

BRN

 

BLK

 

 

CONTROL UNIT

 

 

 

 

 

 

 

 

 

RY1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BLK

 

 

PNK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

HOOD FAN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

THERMAL

 

C9

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CUT OUT

 

 

RY9

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BRN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RY3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BLKBLK

 

 

NOISE

C5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GRN

RESISTOR

 

RY10

 

 

 

RY6

RY5

 

 

RY4

 

RY7

RY1

 

 

 

 

 

BLU

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C7

 

 

 

 

 

 

 

 

 

 

 

 

WHT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

120 V AC. GND

BLK

PPL

HOOD

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CAPACITOR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

60 Hz

 

 

 

 

 

 

 

RY8

 

 

 

 

 

 

 

 

 

 

 

N.O.

COM.

COM.

N.O.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RY1

RY2

RY3

RY3

GRY

 

 

 

HOOD

A1

A3

C1

A5

 

B5

 

B3

 

 

B1

 

B7

YLW

BRN

BRN

PPL

WHT RED

 

 

 

 

 

 

 

PNK

GRY

DAMPER MOTOR

BLU

 

RED

 

 

ORG

 

 

BLK

GRY

YLW

 

 

GRY

BRN

BRN

GRY

MOTOR

TURNTABLE MOTOR

 

 

 

YLW

 

 

 

 

GRY

 

 

 

WHTWHT

OVENLAMP

GRY

PPL HEATING ELEMENT

 

 

 

 

MOTOR

 

 

 

 

 

 

 

 

 

 

CONVECTION MOTOR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DM

 

 

 

TTM

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OL

 

 

 

 

BLU

 

 

REDRED

 

HL

HL

 

 

 

FAN

 

FM

 

 

 

 

CM

 

 

 

 

 

 

 

 

 

HOOD

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LAMP

 

 

 

 

 

 

 

 

 

WHT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

YLW

 

 

 

 

 

 

 

 

 

 

 

 

WHT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GRY SECONDARY

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

INTERLOCK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SWITCH

 

 

 

 

 

 

 

BLK BLK

RY2

E1

PNK

DOOR SENSING SWITCH

N.O.

 

 

 

 

 

 

 

 

 

 

RY2

 

 

 

 

 

 

 

 

 

 

 

 

AH SENSOR

 

 

 

 

POWER

 

 

 

 

 

 

 

 

 

 

 

 

PRIMARY INTERLOCK RELAY

 

 

 

 

 

 

 

TRANSFORMER

 

BLK

BLK

BRN

WHT

MOTORSTIRRER

 

BLKBLK

BLK

 

MAGNETRON

GRN

 

 

 

 

F1

F2

F3

 

 

 

 

 

 

 

E2

E5

E6

 

 

 

BLK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

E3

E4

 

STM

 

 

HIGH VOLTAGE

 

 

 

 

 

 

 

 

 

CAPACITOR

 

 

 

 

 

 

 

 

 

 

0.9F

 

 

 

 

DAMPER

 

 

 

 

 

 

 

THERMISTOR

SWITCH

 

 

MONITOR SWITCH

 

 

 

 

 

 

 

 

WHT

 

WHT

WHT

HIGH VOLTAGE

 

 

 

 

 

 

 

 

 

 

RECTIFIER

 

Figure O-2. Oven Schematic - Microwave Cooking Condition

7

Page 9
Image 9
Sharp R-1870 service manual Figure O-2. Oven Schematic - Microwave Cooking Condition, R - 1 8 7 R - 1 8 7

R-1870 specifications

The Sharp R-1870, R-1871, R-1870BK, and R-1872 microwaves are advanced kitchen appliances designed for efficiency and convenience in meal preparation. These models are known for their innovative features and technologies that enhance everyday cooking.

One of the standout features of these microwaves is the integration of inverter technology. This groundbreaking technology allows for a consistent and even distribution of heat, ensuring that food is cooked thoroughly without overcooking or uneven hot spots. Unlike traditional microwave ovens, inverter technology provides a continuous power output, which is particularly beneficial for delicate foods like seafood, sauces, and sweets.

Another notable characteristic of the Sharp R-1870 series is its spacious interior. With a generous capacity, these microwaves can accommodate large dishes, making them ideal for family meals or batch cooking. The flexible turntable adjustment allows users to maximize interior space for various dish sizes.

The R-1870 series also features sensor cooking technology. This intelligent system detects moisture released by the food during cooking and automatically adjusts cooking times and power levels. This ensures optimal cooking results without the need for constant monitoring, saving time and effort in the kitchen.

User convenience is further enhanced by the user-friendly control panel, which includes pre-programmed settings for popular dishes. This simplifies the cooking process, allowing users to prepare meals with the push of a button. The models also feature a large, easy-to-read display that shows cooking settings and times, making operation straightforward.

In terms of design, the Sharp R-1870 models come in various finishes, including sleek black and stainless steel options, to complement modern kitchen aesthetics. The units are compact, making them suitable for countertops with limited space.

Safety features, such as child lock functionality and a time countdown, are also integral to the design of these microwaves. This adds peace of mind for families with young children or for those who multitask in the kitchen.

All in all, the Sharp R-1870, R-1871, R-1870BK, and R-1872 microwaves represent a fusion of technology and practicality, catering to the needs of today’s busy home cooks. With their inverter cooking capabilities, sensor technology, and spacious designs, these models are a smart addition to any kitchen, making meal preparation easier and more enjoyable.