Sharp R-380D Service Manual page 20

R-380D
Pin No. Signal I/O
24 P25 OUT
25-26 P26-P27 OUT
27-29 P30-P32 OUT
30-34 P33-P37 OUT
35 CVCC IN
36 VSS IN
37-38 V3-V2 IN
39-40 V1-V0 IN
41 VCC IN
42-45 OUT
COM4-COM1
46-65 OUT
SEG1-SEG20
66-79 P74-P91 OUT
80-85 OUT
SEG35-SEG40
86 P40 OUT
87 P41 IN
88 P42 IN
89 IRQ0 IN
90 AVCC IN
91 AN0 IN
92 AN1 IN
93 AN2 IN
94 AN3 IN
95-98 AN4-AN7 IN
99 AN8 IN
100 AN9 IN
Magnetron high-voltage circuit driving signal.
To turn on and off the cook relay (RY2). The
signals holds "L" level during microwave cooking
and "H" level while not cooking. In other cooking
modes (variable cooking) the signal turns to "H"
level and "L" level in repetition according to the
power level.
Terminal not used.
Terminal not used.
Used for initial balancing of the bridge circuit (absolute humidity sensor).
Connected to GND.
Power source voltage: -5.0V.
The power source voltage to the LSI is input to VSS terminal. Connected to VC.
Terminal not used.
Power source voltage input terminal.
Standard voltage for LCD. Connected to GND.
Power source voltage: GND (0V).
The power source voltage to drive the LSI is input to VCC terminal.
Terminal not used.
Terminal not used.
Data output terminal to LCD driver IC3.
Terminal not used.
Terminal not used.
Signal similar to AN10.
When either G13 line on key matrix is touched, a corresponding signal will be input into
P41.
Signal similar to AN10.
When either G12 line on key matrix is touched, a corresponding signal will be input into
P42.
Signal synchronized with commercial power source frequency.
This is the basic timing for time processing of LSI.
A/D converter power source voltage.
The power source voltage to drive the A/D converter in the LSI. Connected to GND.
Used for initial balancing of the bridge circuit (absolute humidity sensor). This input is an
analog input terminal from the AH sensor circuit, and connected to the A/D converter built
into the LSI.
AH sensor input.
This input is an analog input terminal from the AH sensor circuit, and connected to the
A/D converter built into the LSI.
To input signal which communicates the door open/close information to LSI.
Door close "H" level signal (0V). Door open "L" level signal (-5V).
Connected to VC through resistor.
Terminal to change cooking input according to the Model.
By using the A/D converter contained in the LSI, DC voltage in accordance with the Model
in operation is applied to set up its cooking constant.
Input terminal to judge the model.
The signal out of P14 will be input into AN8 through G4 line on key matrix. The LSI will
judge the model by this signal.
Signal similar to AN10.
When either G11 line on key matrix is touched, a corresponding signal will be input into
AN9.
Description
HIGH
M.HIGH
(ON and OFF times for other power level.)
18
OFF
H : GND
ON
L : -5V
OFF OFF
H : GND
24 sec.
8 sec.
ON
L : -5V
H : GND
L : -5V
20.0 msec.