Sharp R-340DK Service Manual page 25

Pin No. Signal I/O
25 P44 OUT
26 P45 OUT
27 P46 OUT
28 P47 OUT
29-36 D8-D15 OUT
37 Vcc IN
38-45 A0-A7 OUT
46 Vss IN
47-58 A8-A19 OUT
59 Vss IN
60 WATT IN
61 P61 OUT
62 P62 OUT
63 P67 OUT
64 STBY IN
65 RES IN
66 NMI IN
67 Vss IN
68 EXTAL OUT
69 XTAL IN
70 Vcc IN
71 AS OUT
72 RD OUT
73 HWR OUT
Key strobe signal.
Signal applied to touch screen section. A pulse signal is input to PB1-PB5 terminal while
one of G10 line keys on key matrix is touched.
Oven lamp, fan motor and turntable motor driving signal
To turn on and off shut off relay (RY1). The
square waveform voltage is delivered to the
RY1 driving circuit and RY2 control circuit.
Magnetron high-voltage circuit driving signal.
To turn on and off the cook relay (RY2). The
signals holds "H" level during microwave
cooking and "L" level while not cooking. In
other cooking modes (variable cooking) the
signal turns to "L" level and "H" level in
repetition according to the power level.
Terminal not used.
Data signal is output to IC2 and IC5.
Power source voltage : +5V.
The power source voltage to drive LSI is input to Vcc terminal. Connected to VCC.
Address signal is output to IC2 and IC5.
Power source voltage : GND (0V).
The power source voltage to drive LSI is input to Vss terminal.
Address signal is output to IC2 and IC5.
Power source voltage : GND (0V).
The power source voltage to drive LSI is input to Vss terminal.
Connected to VCC.
Envelope signal to sound buzzer.
A: key touch sound (short beep). B: Completion sound (melody or long beep).
Reset signal is output to IC5.
Terminal not used.
Connected to VCC.
Auto clear terminal.
Signal is input to reset the LSI to the initial state when power is applied. Temporarily set
"L" level the moment power is applied, at this time the LSI is reset. Thereafter set at "H"
level.
Connected to GND.
Power source voltage : GND (0V).
The power source voltage to drive LSI is input to Vss terminal.
Internal clock oscillation output.
Output to control oscillation input to EXTAL.
Internal clock oscillation frequency control input setting.
The internal clock frequency is set by inserting the ceramic filter oscillation circuit with
respect to XTAL.
Power source voltage : +5V.
The power source voltage to drive LSI is input to Vcc terminal. Connected to VCC.
Terminal not used.
Read strobe signal is output to RD terminal of IC5.
Write strobe signal is output to WR terminal of IC5.
23
Description
16.7 msec.
During cooking
100
PERCENT
OFF
70
PERCENT
(ON and OFF times for other power level.)
R -340DK
R-340DW
H : +5V
L : GND
ON
H : +5V
L : GND
ON
H : +5V
24 sec.
8 sec.
OFF
L : GND