Daewoo DWF-7588TE, Руководство по обслуживанию

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1
The gray & red (The waveform in
secondary part of the transformer)
2
Measuring the wave form in case of the
removing condenser by the removal ripple
C33
3
It is removed the ripple with attaching the
C33(2200µF).
4
The waveform of output in the
REGULATOR I.C 7806.
5
The waveform after passing the D2.
ELECTRIC POWER SUPPLY UNIT
1) CIRCUIT DIAGRAM
2) EXPLANATION OF CIRCUIT
• The primary voltage of the transformer sets 220V, the secondary voltage of the transformer is full
wave rectified by use of the D7 (1N4003) & D8(1N4003).
33 32
16
C3 6
104Z
104Z C31
3300
µ
F
10V
470
µ
F
16V
2200
µ
F
35V
104Z
C13 C34
C32
D1,1N4003
7806
REGULATOR
D8,1N4003
C33
COMMON
220V
D7,1N4003
12V
0V
0V
5.4V
0V
6V
0V
f=60Hz
Vpeak=11.4V
Vrms=8V
12V
WATER LEVEL SENSOR UNIT
1) CIRCUIT DIAGRAM
2) EXPLANATION OF CIRCUIT
• Push the power switch. And, in order to carry on the action of course selection, input the selection of
frequency according to each water level selection.
• The frequency of water level sensor in each water level becomes square wave and is sended to the
MICOM.
If the water level is selected ‘HIGH’ in washing, water suppply proceeds until inputing the frequency 22.70
KHz of ‘HIGH’ in the MICOM terminal No. 24. Being finished the water supply, washing process is
proceeded. After the washing process, water level reaches to RESET point, and then after the (D) + 60
seconds, the spin process begins.
• The value of the frequency between the MICOM terminal No. 24 and the GND.
3) CAUTION FOR A/S
• The output of the frequency in the WATER LEVEL SENSOR varies in accordance with temperature and
using condition. If it doesn’t input the output of the WATER LEVEL SENSOR in the MICOM, the error
message is displayed as ‘E9’. In case of proceeding the water supply continuously in ‘HIGH’ water level,
it is desirable to change the WATER LEVEL SENSOR because of the defect in the WATER LEVEL
SENSOR.
• Check the TR Q4(A1270Y)
• Being checked with tester, the value of the voltage reaches about 4V.
• As the frequency is low, the water level is higher.
M
I
C
O
M
24
R18,220
Ω
Q4
A1270
R20,10K
Ω
R21,10K
Ω
R22, 3.9K
Ω
WATER LEVEL NAME FREQUENCY WATER LEVEL DWF-7588 DWF-9288 DWF-1088
HIGH 22.52KHz 400±15 80L 98L 96L
MIDDLE 23.04KHz 340+10, -15 68L 78L 81L
LOW 23.56KHz 280±15 55L 61L 65L
SMALL 24.05KHz 220±15 42L 48L 49L
E.SMALL 24.33KHz 180±15 30.5L 33L 36L
RESET 25.02KHz
0 25.40KHz
60 ±20
5.4V
0V
f=22~25KHz KHz