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Microcomputer Control System - Sharp AY-A079E Service Manual

Split system room air conditioners
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AY/AE-A079E
AY/AE-A099E
Microcomputer (IC1)
The microcomputer is a CMOS, one chip, 8-bit microcomputer.
Microcomputer port allocation is as follows.
Pin Terminal Input
No. Name
Output
1
P53
IN
2
P52
IN
3
P51
IN
4
P50
IN
5
P33
IN
6
P32
IN
7
P31
IN
8
P30
IN
9
AGND
IN
10 CK2
IN
11 CK1
IN
12 RESET IN
13 F
OUT
14 R46
IN
15 R45
IN
16 R44
IN
17 R43
IN
18 R42
IN
19 R41
IN
20 R40
IN
21 KH
IN
22 P66
IN
23 P65
IN
24 P64
IN
25 P63
IN
26 GND
IN
27 P62
IN
28 P61
OUT
29 P60
IN
30 OSC
IN
31 OSC
OUT
32 TEST
IN
Function
MODEL B
FAN H
FAN M
FAN L
WIRELESS
PREHEAT
PRM PLUSE
SWEAT
0V
OSILLATION
OSILLATION
RESET
BUZZER
DEICE A
DEICE B
COMP. OFF WIDTH
DEHUM. FAN OFF
TEST 1
PRM SIGNAL
AC CLOCK
0V
EEPROM CLOCK
EEPROM DATA
Pin Terminal Input
No. Name
Output
33 P27
IN
34 P26
IN
35 P25
IN
36 P24
IN
37 P23
IN
38 P22
IN
39 P21
IN
40 P20
IN
41 KI
IN
42 P17
OUT
43 P16
OUT
44 P15
OUT
45 P14
OUT
46 P13
OUT
47 P12
OUT
48 P11
OUT
49 P10
OUT
50 P07
OUT
51 P06
OUT
52 P05
OUT
53 P04
OUT
54 P03
OUT
55 P02
OUT
56 P01
OUT
57 P00
OUT
58 GND
IN
59 VDD
IN
60 VR
IN
61 P57
IN
62 P56
IN
63 P55
IN
64 P54
IN
8
Function
MODEL 4
MODEL 3
MODEL 2
MODEL 1
SWITCH AUX.
SWITCH TEST RUN
POWER ON
WIRELESS SIGNAL
LED OPERATION
LED TIMER
(VALVE COIL)
(OUT DOOR FAN)
RY1
SSR
LOUVER MOTOR
LOUVER MOTOR
LOUVER MOTOR
LOUVER MOTOR
0V
5V
5V
(CURRENT LEVEL)
TH1
TH2
MODEL A

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