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15
2
ULN-2004
16
1
9
8
BUZZER INPUT UNIT
1) CIRCUIT DIAGRAM
LOAD
SELECT
37
D11 SW4
SW3
OPTION : PUMP
SW8
SW7
SW6
SW5
D19 SW12
D18
D17
D16
SW9
D24
1N4148
D22
D12
D25
• Part of the button scan
6
IC06
SW4
D11
SW3
D12
RA1,473J
D15
R66.22O
D13
R67.22O
51 BUTTON SCAN
62 SEGMENTAL PART
MICOM
57
PART OF THE
BUTTON INPUT
58
The system of the BUTTON SCAN is in wide use for the method of the DUTY output part in L. E. D DRIVE yet here. It is in
use for the method of the segmental output.
Duty part
Waveform
No Generation
Segmental Waveform for
Button Input
Segment part
• Though the period of the DUTY part is 1/9, the last 9th part does not generate the waveform and checks the button input
with getting out the segmental output at the same time.
• RA1 (473J, 47KΩ) is a ‘PULL DOWN’ resistance for preventing floating action.
• D15 prevents the L. E. D from turning on unnecessarily with forming the closed loop like a threaden line at the time of
button push.
38
OSCILLATION UNIT
1) CIRCUIT DIAGRAM
!
CF2, 15
CF1, 14
@
XT2, 12
RP2
10M
1.6W
XT1, 11
33PF
33PF
C5 18PF
C4 18PF
Murata 3 Terminal
Ceramic Resonator
(CST12.00MTW)
Kyocera 32.768 KHz
Crystal Cscillator
(KF-38G-13P0200)
2) EXPLANATION OF CIRCUIT
• As the OSCILLATION UNIT is a basic part of the MICOM DRIVE. If the oscillation doesn’t generate, we are able to
consider that the MICOM is destroyed.
–The waveform between the part of ! and the GND.
–The waveform between the part of @ and the GND.
f=12MHz
f=32.768KHz
t
t
• Specification of oscillator
CONDENSER
C1
C2
33PF
33PF
18PF
18PF
NAME OF
OSCILLATOR
TYPE OF OSCILLATOR
MAKER
12MHz
CERAMIC RESONATOR
32.768KHz
CRYSTAL OSCILLATOR
MURATA
CST 12.00 MTW
KYOCERA
KF-38G-13P0200
It is in general use for the MICOM maker’s recommendatory value of condenser which is fit for MICOM’s characteristics.
• The R82(18MΩ, 1/4W) is in use to get rid of the initial abnormal oscillatory phenomenon of the 32.768 KHz crystal
oscillator.
39
SAFETY SWITCH UNIT
1) CIRCUIT DIAGRAM
R4,3.9K
R3.220
Safety
S/W
C1
104Z
2) EXPLANATION OF CIRCUIT
• The MICOM terminal No. 63 gets into 'L' at the state of the closed lid. If the lid is opened in spining stage, the MICOM
generates error signal as 'LE'.
• Case of range 40 mSEC~300 mSEC in spining time: It is regarded that washing clothes should be inclined.
Accordingly washing time increases 8 minutes and rinsing action takes place another one time. Case of above 400
mSEC: It is regarded that the lid should be open. Therefore it is displayed as 'LE'.
3) CAUTION FOR A/S
• Be level with the ground.
• The 'UE' error occurs in case of not being level with the ground.
• The waveform between the MICOM terminal No. 63 and the GND.
5.4V
Lid is closed
Lid is open
0V
t
LOAD SENSOR UNIT
1) CIRCUIT DIAGRAM
TRIAC
MOTOR
RUNNING CONDENSOR
5.4V
R39,10K
Q16
C1959
R17
10K
6V
R53, 10K
R55, 10K
R54
3.9K
IC4
D5
1N4148
PC817
!
R13, 220
2) EXPLANATION OF CIRCUIT
• After TRIAC is off, RUNNING CONDENSOR discharges the voltage charged in it and sinwave is generated at this time.
MICOM starts to check every 0.224ms the time from 2nd falling edge to 3rd falling edge. Photo coupler (IC4) of PCB
converts the sinwave into clock pulse (times X 0.224ms) and send it to MICOM terminal No. 22 & 23. MICOM checks
the clock pulse and counts the periodic time and judges the water level after comparing with data which is already
memorized in the MICOM.
• The waveform between the part of ! and GND (Waveform of pulse)
triac on
triac off
1st
2nd
3nd
(time X 0.224ms)
40
5.4V
23
R14, 220
22
C12
104Z
M
I
C
O
M
Q3
A562
• The element which has an effect on data of LOAD SENSOR
CONDITION
SPECIFICATION
VOLTAGE
220V AC
CAPACITY OF CONDENSER
13.5 µF
TENSION OF BELT
450 gf
DISPLAY UNIT
1) CIRCUIT DIAGRAM
CH4
26 26
6V
14 14
CH3
13 13
CH2
6V
!
A
CH1
10
9
SM
Lo
MI
HI
I.C8
COLD
ME
HOT
ULN-2981
RA4(4X103J)
RA3(4X103J)
5.4V
C36
104Z
B
33 S8
34 S9
35 S10
36 S11
37 S12
38 S13
39 S14
40 S15
41 VddVpp
42 Vp
43 S16
44 S17
45 S18
46 S19
47 S20
48 S21
49 S22
50 S23
51 S24
52 S25
53 S26
54 S27
BK1,BK2
MD1,MD2
ST1,ST2
SP1,SP2
41
SKg,SKb
WO1,WO2
9
8
SD1,SD2
12
5
F1,F2
I.C7
ULN-2004
11
6
12
5
13
4
11
8
12
7
13
6
14
5
14
4
15
3
17
2
18
1
10
7
11
6
13
4
14
3
15
2
16
1
10
7
14
3
2) EXPLANATION OF CIRCUIT
• The MICOM terminal No. 33~40 amplifies the source current to produce the 'H' by use of the buffer UDN-2981A. And
the MICOM terminal No. 43~54 sufficiently amplifies the sink current by use of the DRIVE I.C. ULN-2004A.
• The waveform between the part of ! and the GND (part of the DUTY).
5.4V
0V
t
3.085 mSEC
The division rate of the DUTY is 1/9. And as part of the DUTY treats the black time between the square waves, it
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