DAEWOO ELECTRONICS DWF-5590D Series, Service Manual, Page: 31 / 63

2) DETAIL EXPLANATION OF CIRCUIT ACTION (ACTION OF CW WASH)
•In case MICOM terminal No. 31 is ‘H’ and No. 6 is ‘L’, Q14(C3202Y) & Q15 (A1271Y) turn on and control the TRIAC. The
resistance, as 62
Ω
& 1/2W, of R52 is used to limit the GATE current of the TRIAC.
•The resistance R38 (3.9K
Ω
, 1/4W) and R45 (1K
Ω
, 1/4W) control the base current of Q14 & Q15 in order as TR forces to
turn on sufficiently.
•The ceramic condenser C29 between T1 and the GATE of the TRIAC is used for preventing the wrong action by means of
the noise.
•The R63 (100
Ω
, 1W) and C28 (683K) between the T1 and T2 of the TRIAC is used for protecting the TRIAC, it is usually
called SNUBBER CIRCUIT.
•The waveform of MICOM Pin No. 31 & 6.
31
M
I
C
O
M
R38,3.9K
R40
10K
R10
10K
R45,1K
Q15
A1271Y
AC COMMOM
R52,62
C29
R63,100,1W
C28, 683
104Z
TRIAC1
Q14
C3202Y
31
6
action action stop
0V
Terminal No. 31
5.4V
action
0V
Terminal No. 6
5.4V
t
t
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