Sharp KB-5121KS Service Manual page 28

KB-5121KS/K/W
Pin No. Signal
20 INT0
21 P81
22 TA4OUT
23 P77
24 TA3OUT
25 TA2IN
26-30 P74-P70
31-33 A67-A65
34 P64
35 TXD0
36 RXD0
37 P61
38 P60
39 RDY
40 ALE
41 HOLD
42 HLDA
43 BCLK
44 RD
45 WRH
46 WR
I/O
IN Signal to synchronize LSI with commercial power source frequency.
This is the basic timing for all real time processing of LSI.
OUT Signal to change the rotational direction is output to the Microwave drawer door
open-close motor.
OUT 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.
OUT Magnetron high-voltage circuit driving signal.
To turn on and off the cook relay(RY2). In 100%
power operation, the signals holds "H" level during
microwave cooking and "L" level while not cook-
ing. In other cooking modes (90%, 80%, 70%,
60%, 50%, 40%, 30%, 20%, 10%, 0%) the signal
turns to "H" level and "L" level in repetition accord-
ing to the power level.
OUT Signal to change the rotational speed is output to the Microwave drawer door open-close
motor.
IN Plus signal coming from the Microwave drawer door open-close motor is input into TA2IN
as revolution number.
OUT Used for initial balancing of the bridge circuit (absolute humidity sensor).
OUT Terminal not used.
IN To input signal which communicates the oven door open/close information to LSI.
Door open "H" level signal (+5V). Door close "L" level signal (GND).
IN Signal coming from key unit.
IN Signal coming from key unit.
OUT Signal to reset LSI.
Signal is output to reset IC-2, IC-3 and IC-4.
IN Signal coming from key unit.
IN Connected to VCC2 (+3.3V).
OUT Terminal not used.
IN Connected to VCC2 (+3.3V).
OUT Terminal not used.
IN Connected to VCC2 (+3.3V).
OUT Read strobe signal is outout to the LCD.
OUT Terminal not used.
OUT Write strobe signal is outout to the LCD.
Description
26
H : +5V
L : GND
16.7 msec.
0.1 sec
A
2.0 sec
B
1.0 sec
1.0 sec
H: +5V
C
L: GND
Other cooking mode
Microwave cooking mode
VARI MODE ON TIME OFF TIME ON TIME OFF TIME
100% 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. 10 sec. 36sec.
50% power 18 sec. 14 sec. 30sec.
40% power 16 sec. 16 sec. 24sec.
30% power 12 sec. 20 sec. 18sec.
20% power 8 sec. 24 sec. 12sec.
10% power 6 sec. 26 sec. 4sec.
0% power 0 sec. 32 sec. 0sec.
0ec.
6sec.
12sec.
18sec.
24sec.
30sec.
36sec.
42sec.
48sec.
56sec.
60sec.