Daewoo DSB-070LH Service Manual page 83

Triac Driving(4)
MICOM
DESCRIPTION
Number 38 Terminal of Micom is put out Pulse Output, by way of Buffer it is driving Photo Triac is supplied
Trigger Signal.
Trigger Test of Triac is detected Zero Cross Part of AC input and it is triggered from Zero Cross part to Time
delay part according to Fan Speed. (Ref. Fig 4-1) SN1 is Snubber.
AC220V
TRIGGER
MOTOR
INPUT
IC4
KID 65004
2 15
38
MEDIUM SPEED
LOW SPEED LOW SPEED MEDIUM SPEED
12V
TLP561
PT1
T1
SM3JZ47
R5
1K
1/2W
HIGH SPEED HIGH SPEED
Fig 4-1
78
N
L1
AC 220V
1 2
L
130µH
3A
SN1
0.1µF
120Ohm
TO MOTOR