Daewoo DWF-7588TE, Service Manual

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39 38
SAFETY SWITCH UNIT
1)CIRCUIT DIAGRAM
2) EXPLANATION OF CIRCUIT
• The MICOM terminal No. 63 gets into ‘L’ at the state of the closed lid. If lid is open in spinning state,
the MICOM generates error signal as ‘LE’ .
• Case of range 40mSEC~300mSEC in spinning 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 300 mSEC : It is regarded that 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.
LOAD SENSOR UNIT
1) CIRCUIT DIAGRAM
2) EXPLANATION OF CIRCUIT
• Detecting the voltage of running condenser, it sends the sensing data to the MICOM terminal No. 22
& 23. That is, as charging & discharging time of runing condenser becames different according to the
loads, in fuzzy course the washing time is determined by sensing the quantity of washing clothes.
• The waveform between the part of
1
and the GND(waveform of pulse).
R4, 3.9K
Ω
Door S/W
Unbalance
S/W
C1
104Z
R3,220
Ω
5.4V
0V
t
Lid is closed Lid is open
M
I
C
O
M
PC817
D5
IN4148
IC4
R53,10K
R55,10K
R54,3.9K
R17,10K
Q16,C1959
R39,10K
Q3
A562
5.4V
R13, 220
R14, 220
C12
104Z
23
22
6V
1
6V
0V t
OSCILLATION UNIT
1)CIRCUIT DIAGRAM
2)EXPLANATION OF CIRCUIT
• As the OSCILLATION UNIT is a basic part of the MICOM DRIVE. If the oscillation doesn’t generate, we
able to consider that the MICOM is destroyed.
• The waveform between the part of
1
The waveform between the part of
2
and the GND and the GND
• Specification of oscillator
It is general use for the MICOM maker’s recommendatory value of condenser which is fit for MICOM’s
characteristics.
• The R82(10M
Ω
, 1/6W) is in use to get rid of the initial abnormal oscillatory phenomenon of the 32.768
KHz crystal oscillator.
1
2
M
I
C
O
M
CF2,15
CF1,14
XT2, 12
XT1, 11
R17
10M
Ω
1/6W
C5,18PF
C4,18PF
33PF
33PF
Murata 3 Terminal
Ceramic Resonator
(CST 12.00MTW)
Kyocera 32.768 KHz
Crystal Oscillator
(KF-38G-13P0200)
CONDENSER
TYPE OF OSCILLATOR MAKER NAME OF OSCILLATOR
C1 C2
12 MHZ
MURATA CST 12.00 MTW 33 PF 33PF
CERAMIC RESONATOR
32.768KHZ
KYOCERA KF-38G-13P0200 18PF 18PF
CRYSTAL OSCILLATOR