Daewoo DWF-5590DP Series, Service Manual

Page: 32 / 63

3) CAUTION AND CHECKING FOR A/S
• If load is active as soon as the power switch is ‘ON’, check the driving TRIAC of load.
• Check the MICOM output terminal, if the load doesn't act although the TRIAC isn't anything wrong.
• Sometimes it is happened that the TRIAC DRIVE TR has a short circuit or an open circuit. In this case, being measured the
resistance between the TR E & C with tester, the resistance value should be near the oo
Ω
. If not, the DRIVE TR is out of
order.
• If the ceramic condenser (C17, C19, C20, C23, C24, C26, C29) using by protecting the noise between the GATE & T1 of
each TRIAC has a short circuit, it has no voltage drop between the T1 and GATE. Therefore, the TRIAC is not turn on.
• If MICOM terminal No. 6 is not active from 5.4V to 0V, all DRIVE TR of the TRIAC are not turn on. Therefore, if the TRIAC is
out of order, to begin with, check the MICOM terminal No. 6 and TR Q15(A1271) necessarily.
• The TRIAC's names and the values of the snubber & resistance of the total parts.
32
SM12JZ47 (12A), SM8JZ47 (8A) BCR1AM-12L
• CHECK the resistance of the T1 & T2 • CHECK the resistance of the T1 & T2
of the TRIAC. (
∞Ω
). of the TRIAC. (
∞Ω
).
• CHECK the total parts without fail, in • CHECK the total parts without fail, in
case the TRIAC has a short circuit. case the TRIAC has a short circuit.
T1 T2 G
shape
T1 G T2
shape
THE GATE’S
THE
LOAD TRIAC’S NAME
RESISTANCES OF THE VALUES OF
RESISTANCES OF
LIMITED THE SNUBBER
TOTAL PARTS
CURRENTS
CW WASH SM12JZ47
63
Ω
, 1/2W
100
Ω
, 1W+683K
BCR 12PM-14L AC 250V
CCW WASH SM12JZ47
62
Ω
, 1/2W
100
Ω
, 1W+683K
BCR12PM-14L AC 250V
DRAINAGE BCR1AM-12L 330
Ω
, 1/4W
100
Ω
, 1W+103K
AC 250V
HOT & COLD
BCR1AM-12L 330
Ω
, 1/4W
100
Ω
, 1/W+223K
WATER AC 250V
BUBBLE
BCR1AM-12L 330
Ω
, 1/4W
100
Ω
, 1W+103K
GENERATOR AC 250V
FUNCTION
SM8JZ47 100
Ω
, 1W+103K
OF POWER
BCR8PM-14L
62
Ω
, 1/2W
AC 250V
AUTO OFF
SM12JZ47 (12A), SM8JZ47 (8A) BCR1AM-12L