Figure S-2. Touch Control Panel Circuit

11

1

2

3

4

5

6

H

G

F

E

D

C

B

A

T1

CONTROL UNIT

AC120V

60Hz

MOTOR RUN CAPACITOR

TURNTABLE MOTOR

FAN MOTOR

A5

A1

A3

B1

B3

VRS1

 

10G471K

1

 

 

 

 

R - 1 8 7 0 R - 1 8 7 15

d 2Manual background

b

a

(J1)Manual background

c

C100

RY4

6

D1-D4 : 11ES1

3

D1

D4

4

D2

D3

0.1/50v

C1

 

 

 

/35v

R14.3k 1/2w

1.5kR2

1

/50v0.1C3

/35v

HZ5C2ZD3

 

ZD4

HZ4A2

1000 C2

ZD1 HZ6A3

ZD2 - HZ16

10 C4

v

 

 

 

 

 

 

 

16

 

 

+

 

 

 

 

+

 

 

 

 

 

 

 

 

C50.01

 

 

 

 

Q1 2SB1238

 

R4 510 1/2w

 

 

 

4.7k

 

 

R3 680 1w

 

 

 

Q3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

KRA101M

R8

 

 

 

 

 

 

 

 

 

RY5

D20

Q20 KRA101M

SP40

R403.3k

C9 0.1

 

 

 

 

/50v

Q4

DTA123ES

R7 4.7k

C7

C8

C10 0.1/50v

(VP)

R90 100k

Q90 KRA101M

NOTE

: IF NOT SPECIFIEED, 1/4w ± 5%

: IF NOT SPECIFIEED, 1SS270A

: IF NOT SPECIFIEED, 0.01F/16v

 

 

FLUORESCENT DISPLAY TUBE

F

1, 2

MIX CONV

F

31, 32

P1

4

DEFROST

SENSOR

1

2

D21

Q21 KRA101M

 

Q40

35v

1

IC2 IZA495DR

12 (VP)

TURNTABLE

ON OFF COOK LBS OZ KG HELP

 

 

 

 

DAMPER MOTOR

B5

 

KRA101M

+

10

RY6

 

 

C12

D22

Q22 KRA101M

 

 

 

 

 

 

Manual backgroundC11

VCC

P30

Manual backgroundR100 330 1w

 

 

 

5

6 7 8 9

10 11

12

13

15

16

17

18 19

20

22

23 24

25

26

27 28

29

100k

100k

100k

P2

P3

P4

P5

P6

P7

P8

P9

P10

P11

P12

P13

P14

P15

P16

1G

2G

3G

4G

5G

6G

7G

8G

CONVECTION MOTOR

B7

RY7

 

(J2)

(J4)

(J6)

(J3)

(J5)

(J7)

D23

Q23 KRA101M

 

 

 

 

 

 

 

 

 

 

 

 

 

VEE

P31

 

 

 

 

 

 

 

 

 

 

 

 

 

AVSS

P32

 

 

 

 

 

 

 

 

 

 

 

 

 

VREF

P33

 

 

 

 

 

 

 

 

 

 

 

 

 

AN7

P34

 

 

 

 

 

 

 

 

 

 

 

 

 

AN6

P35

 

 

 

 

 

 

 

 

 

 

 

 

 

AN5

P36

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(C) (B) (A)

R91

R92

R93

HOOD LAMP C1

COM

C3

C9

HOOD THERMO

HOOD MOTOR

 

LOW

C7

HIGH

C5

COM

NO

OVEN LAMP

COM

RY8 D24 Manual background RY9 D25 Manual background RY10 Manual background D26 Manual background

RY1 Manual backgroundManual background D27 Manual background

Q24 KRA101M

Q25 KRA101M

Q26 KRA101M

10/35v

 

 

C20

+

Q27

KRC243M

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

+

/50v0.1

 

 

 

 

 

 

 

 

 

 

 

C21

 

 

 

 

 

Q30

KRA101M

R65 1k

Manual backgroundD65

C65 100∝ 16v

+

AN4

 

P37

AN3

 

P00

AN2

 

P01

AN1

 

P02

AN0

 

P03

P55

 

P04

P54

 

P05

P53

 

P06

P52

 

P07

P51

 

P10

P50

IZA719DR

P11

P47

P12

P46

P13

P45

P14

P44

P15

P43

P16

P42

P17

INT1

P20

IC1

P40

P21

RST

P22

P71

P23

 

P70

 

P24

XIN

 

P25

XOUT

 

P26

VSS

 

P27

R76 3.3k

R77 3.3k

R78 3.3k

R79

3.3k

R80

3.3k

R81

3.3k

R82 3.3k

D70

 

D71

D72

D73

 

D74

 

D75

D76

NO

MICRO

RY2 D28 Manual background

C30

C50

15k

C60

3.6kF

Q60

R64

KRC102M

 

CF1 4MHz

Manual backgroundR75 100k

C74 330pF

G 8

G 1 Manual backgroundManual background G 2 Manual background G 3 Manual background G 4 Manual background G 5 Manual backgroundManual background G 6 Manual backgroundManual background G 7 Manual background

CUSTOM SENSOR

MINUTE

POPCORN

COMPU

SENSOR

COMPU

HELP REHEAT

PLUS

DEFROST

COOK

BROIL

COM

NO

CONVECTION

HERTER

COM

RY3 Manual backgroundManual background D29 Manual background

D32

Q28 KRA101M

Q29 KRA101M

R30

R50 15k

R31 4.7k

R51 4.7k

D31

 

R63 220F

R62 36kF

(A)(B)

(C)

C73 330pF

C72 330pF

C71 330pF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LOW MIX

HIGH MIX

 

COMPU

COMPU

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

G 9

CONVEC PREHEAT

 

BAKE

ROAST

 

ROAST

 

BAKE

 

 

 

 

 

SLOW

1

 

2

 

3

4

 

5

 

G10

 

BROIL

COOK

 

100˚F

 

150˚F

275˚F

 

300˚F

 

325˚F

 

 

KITCHEN

 

 

6

 

7

 

8

9

 

0

 

G11

 

TIMER

CLOCK

 

350˚F

 

375˚F

400˚F

 

425˚F

 

450˚F

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3

4

5

 

 

 

 

 

 

 

 

 

 

G12

TURNTABLE POWER

KEEP

STOP

START

FAN LIGHT

 

 

 

 

 

 

 

 

 

 

ON / OFF

LEVEL

WARM

CLEAR

TOUCH ON

 

 

 

 

 

 

 

 

 

 

C70 330pF

 

 

 

D30

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

KEY UNIT

 

 

 

 

 

 

 

E1

E2

E3

E4

E5

E6

F1

F2

F3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

AH SENSOR

 

 

 

 

 

 

 

 

DOOR

DAMPER

OVEN

 

 

 

 

 

 

 

 

 

 

 

 

SWITCH

SWITCH

THERMISTOR

 

 

 

 

 

 

 

 

 

 

 

 

Figure S-2. Touch Control Panel Circuit

 

 

 

 

 

 

H

G

F

 

 

E

 

 

 

D

C

 

 

B

 

 

A

6

R - 1 8 7 0 R - 1 8 7 1

Page 13
Image 13
Sharp R-1870 service manual Figure S-2. Touch Control Panel Circuit, R - 1 8 7 0 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.