Sharp KB-6021MS Service Manual page 22

KB-6021MS
KB-6021MK
KB-6021MW
Pin No. Signal
47 P05 OUT
48-52 P04-P00 OUT
53 P57 OUT
54 P56
55 TXD
56 RXD
57 P53
58 P52 OUT
59 P5
60 INT0
6 AVSS
62 VREF
63 AN7
64 AN6
I/O
Magnetron high-voltage circuit driving signal.
To turn on and off the cook relay(RY2). In 00%
power operation, the signals holds "H" level during
microwave cooking and "L" level while not cooking.
In other cooking modes (90%, 80%, 70%, 60%,
50%, 40%, 30%, 20%, 0%, 0%) the signal turns
to "H" level and "L" level in repetition according to
the power level.
Used for initial balancing of the bridge circuit (absolute humidity sensor).
Common relay driving signal. (Square Waveform : 60Hz)
To turn on and off the shut-off relays (RY). The
square waveform voltage is delivered to the relay
(RY) driving circuit.
IN Terminal not used.
IN Terminal not used.
IN Terminal not used.
IN Terminal not used.
Signal to sound buzzer.
A: Key touch sound.
B: Completion sound.
C: When the oven stops so that the food can be
checked in Automatic cooking mode.
Input signal which communicates the drawer door close information to LSI.
IN
Door opened; "H" level signal(+5V).
Door closed; "L" level signal(0V).
IN Signal to synchronize LSI with commercial power source frequency.
This is the basic timing for all real time processing of LSI.
A/D converter power source voltage.
IN
The power source voltage to drive the A/D converter in the LSI.
Reference voltage input terminal.
IN
A reference voltage applied to the A/D converter in the LSI. Connected to +5V.
IN 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.
IN 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.
Description
22
Microwave cooking mode
Other cooking mode
VARI MODE ON TIME OFF TIME ON TIME OFF TIME
00% power 32 sec. 0 sec. 60sec.
90% power 30 sec. 2 sec. 54sec.
80% power 26 sec. 6 sec. 48sec.
70% power 24 sec. 8 sec. 42sec.
60% power 22 sec. 0 sec. 36sec.
50% power 8 sec. 4 sec. 30sec.
40% power 6 sec. 6 sec. 24sec.
30% power 2 sec. 20 sec. 8sec.
20% power 8 sec. 24 sec. 2sec.
0% power 6 sec. 26 sec. 4sec.
0% power 0 sec. 32 sec. 0sec. 60sec.
6.7 msec.
During cooking
0. sec
A
2.0 sec
B
.0 sec
.0 sec
C
6.7 msec.
0ec.
6sec.
2sec.
8sec.
24sec.
30sec.
36sec.
42sec.
48sec.
56sec.
H: +5V
L: GND
H: +5V
L: GND
H : +5V
L : GND