R-480J

LSI

The I/O signal of the LSI is detailed in the following table.

Pin No.

Signal

I/O

 

Description

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

COM5

OUT

Common data signal : COM11.

Connected to LCD signal COM11.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

COM4

OUT

Common data signal : COM12.

Connected to LCD signal COM12.

 

3

COM3

OUT

Common data signal : COM13.

Connected to LCD signal COM13.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4

COM2

OUT

Common data signal : COM14.

Connected to LCD signal COM14.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5

COM1

OUT

Common data signal : COM15.

Connected to LCD signal COM15.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

6

COM0

OUT

Common data signal : COM16.

Connected to LCD signal COM16.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

7-10

VL1-VL4

IN

Power source voltage input terminal.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Standard voltage for LCD.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

11

VL5

IN

Power source voltage input terminal.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Standard voltage for LCD. Connected to GND.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

12-14

C3-C1

IN

Terminal not used.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

15

VLIN

IN

Terminal not used.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

16

VREG

OUT

Terminal not used.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

17

NC

_

Terminal not used.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

18

VSS

IN

Power source voltage : -5.0V.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The power source voltage to the LSI is input to VSS terminal. Connected to VC.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

19-21

P27-P25

OUT

Terminal not used.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

22-26

P24-P22

IN

Used for initial balancing of the bridge circuit (absolute humidity sensor).

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

27

P47

IN

To input signal which communicates the door open/close information to LSI.

 

 

 

 

Door close "H" level signal (0V). Door open "L" level signal (-5V).

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

28

P46

OUT

Terminal not used.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

29

P45

OUT

Oven lamp, fan motor and turntable motor driving signal.

 

 

 

 

To turn on and off shut off relay (RY1). The

 

 

 

20.0 msec.

 

 

 

 

 

 

 

 

H : GND

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

square waveform voltage is delivered to the RY1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

driving circuit and RY2 control circuit.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

L : -5V

 

 

 

 

 

 

 

 

 

 

 

 

 

During cooking

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

30

P44

OUT

Magnetron high-voltage circuit driving signal.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

To turn on and off the cook relay (RY2). The

OFF

 

H : GND

100

 

signals holds "L" level during microwave cook-

 

 

PERCENT

ON

 

ing and "H" level while not cooking. In other

L : -5V

 

 

cooking modes (variable cooking) the signal

OFF

 

OFF

turns to "H" level and "L" level in repetition

70

24 sec.

H : GND

 

according to the power level.

 

 

PERCENT

ON

8 sec.

 

 

 

L : -5V

 

(ON and OFF times for other power level.)

31

P43

_

Terminal not used.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

32

CNTR0

OUT

Signal to sound buzzer (2.0 kHz).

 

 

0.1 sec.

 

 

 

A: key touch sound.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

H : GND

 

 

 

A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

B: Completion sound.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

L : -5V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2.0 sec.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

H : GND

 

 

 

 

B

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

L : -5V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

33

P41

OUT

Terminal not used.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

34

INT0

IN

Signal synchronized with commercial power source frequency.

 

 

 

This is the basic timing for time processing of LSI.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

H : GND

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

L : -5V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

20.0 msec.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

35

P07

OUT

Key strobe signal.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Signal applied to touch-key section. A pulse signal is input to AIN7, P14, P15, P16 and P17

 

 

 

terminal while one of G1 line keys on key matrix is touched.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

36

P06

OUT

Key strobe signal.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Signal applied to touch-key section. A pulse signal is input to AIN7, P14, P15, P16 and P17

 

 

 

terminal while one of G2 line keys on key matrix is touched.

17

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Sharp R-480J service manual Lsi

R-480J specifications

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In conclusion, the Sharp R-480J microwave oven stands out for its powerful performance, user-friendly features, and practical design. Its combination of high wattage, multiple power levels, and sensor cooking technology makes it a versatile appliance for any kitchen. Whether tackling daily meals or experimenting with new recipes, the R-480J is equipped to meet diverse cooking needs with ease and efficiency.