Daewoo DWF-4230 Series Service Manual page 14

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.
SM12JZ47 (12A), SM8JZ47 (8A)
?
? ?
? • CHECK the resistance of the T1 & T2
/ K f @ ? W 2 @ ? @ 6 K O @ ? g ?
V 4 @ ? e @ W & @ @ ? @ @ @ @ @ ? g ?
@ @ U @ @ W @ @ X ? h ?
@ @ @ ? e ( R 4 @ @ ( M I 4 @ @ ? g ? @ Y h f ?
@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ f ?
@ ? h W @ @ X h ? @ f ?
@ ? h 7 @ @ ) X ? g ? @ f ?
@ ? h @ ? ? @ , ? g ? @ f ? @ ? h 3 @ @ ( Y ? g ? @ f ?
@ ? h V @ @ Y h ? @ f ?
@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ f ? of the TRIAC. (∞Ω).
@ ? ? @ f ?
@ ? @ ? ? @ f ? ? @ f ?
@ ? ? @ f ?
@ ? ? @ f ?
@ ? ? @ f ?
@ ? @ ? ? @ f ? ? @ f ?
@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ f ?
@ ? e @ ? @ ? e @ ? @ ? e @ ? g ?
@ ? e @ ? @ ? e @ ? @ ? e @ ? g ? • CHECK the total parts without fail, in
@ ? e @ ? @ ? e @ ? @ ? e @ ? g ? @ ? e @ ? @ ? e @ ? @ ? e @ ? g ?
@ ? ? J @ ? @ ? e @ ? @ ? e @ ? g ?
@ ? ? 7 5 ? @ ? ? J @ ? @ ? ? J @ ? g ?
@ ? ? @ H ? @ L ? 7 5 ? @ L ? 7 5 ? g ?
@ ? ? @ e 3 1 ? @ H ? 3 1 ? @ H ? g ? 3 @ @ 5 e N @ ? @ e N @ ? @ h ?
N @ @ H e ? @ ? @ e ? @ ? @ h ?
? @ @ ? e ? @ ? @ e ? @ ? @ h ?
? @ @ ? e ? @ ? @ e ? @ ? @ h ?
? @ @ ? e ? @ ? @ e ? @ ? @ h ? ? @ @ ? e ? @ ? @ e ? @ ? @ h ? case the TRIAC has a short circuit.
? @ @ ? e ? @ @ @ e ? @ @ @ h ?
?
@ ? ? @ f ? @ ? @ ? @ f @ ? g ?
@ ? ? @ f ? @ e J 5 f @ ? g ?
@ ? ? @ f ? @ ? W . Y f @ ? g ? @ ? ? @ f ? @ ? . Y ? f @ ? g ?
?
?
• Check the MICOM output terminal, if the load doesn't act although the TRIAC isn't anything wrong.
• If the ceramic condenser (C22, C17, C13, C15, C19, C25) 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. Therfore, the TRIAC is not turn on.
• The TRIAC's names and the values of the snubber & resistance of the total parts.
RESISTANCES OF
LOAD TRIAC'S NAME
SM12JZ47
CW WASH
BCR 12PM-14L
SM12JZ47
CCW WASH
BCR12PM-14L
DRAINAGE BCR1AM-12L
HOT / COLD
BCR1AM-12L
WATER
PUMP SM8JZ47
WATER LEVEL SENSOR UNIT1/ CIRCUIT DIAGRAM
1) CIRCUIT DIAGRAM
BCR1AM-12L
? ?
W 2 @ ? @ 6 X ? / T 2 @ 6 T 2 6 X ? h ? • CHECK the resistance of the T1 & T2
* U e ? B 1 ? S @ @ ? B @ Y V 1 ? h ?
V 4 @ ? e @ W & @ @ ? ? @ @ @ @ ? h ?
@ @ @ ? e ( R 4 @ @ @ 0 R 4 @ @ ? h ? @ @ U @ @ ? C @ X ? h e ?
@ ? h g ?
? O 2 6 K ? @ L h g ?
? W 2 @ @ @ 0 M g I 4 @ @ @ 6 X ? h ? ? O 2 @ @ @ @ @ @ @ @ ) K ? h f ?
W & ( M I ' ) K h ?
7 ( Y ? ? V 4 @ 6 X g ?
? J @ H @ 1 g ?
? @ H ? ? 7 5 ? O 2 @ @ 0 M ? @ g ? ? O 2 @ @ @ g ? of the TRIAC. (∞Ω).
? @ L ? h e ? O 2 @ @ 0 M ? e ? @ g ?
? @ ) K h O 2 @ @ 0 M g ? @ g ?
? @ @ @ 6 K e O 2 @ @ @ 0 M ? h ? @ g ?
? @ ? I ' @ @ @ @ 0 M ? h f ? @ g ? ? @ e V ' @ ? ? @ g ?
? @ e ? N @ ? ? @ g ?
? @ f @ ? ? @ g ?
? @ f @ ? ? @ g ?
? @ f @ ? ? @ f @ ? h f ? O 2 @ @ @ g ? ? @ g ?
? @ L ? e @ ? h ? O 2 @ @ @ @ ? h ? • CHECK the total parts without fail, in
? 3 ) X e @ ? g O 2 @ @ 0 M e @ ? h ?
? V ' ) X ? @ ? e ? O 2 @ @ @ g @ ? h ? V ' ) X @ ? O 2 @ @ 0 M ? @ g @ ? h ?
? V 4 @ @ @ @ @ f ? @ g @ ? h ?
? @ f ? @ g @ ? h ?
? @ f ? @ g @ ? h ?
? @ f ? @ g @ ? h ? ? @ f ? @ g @ ? h ?
? @ f ? @ g @ ? h ?
? @ f ? @ g @ ? h ?
? @ f ? @ g @ ? h ? case the TRIAC has a short circuit.
? @ f ? @ g @ ? h ? ? @ ?
?
? @ h f ? @ ? @ ? @ f ?
? @ @ ? f ? @ e J 5 f ? ? @ ? W . Y f ?
@ ? f ? @ ? . Y ? f ?
?
? @ @ ? h g ?
?
THE GATE'S
THE VALUES OF
RESISTANCES OF
LIMITED THE SNUBBER
TOTAL PARTS
CURRENTS
100Ω, 1W+683K
100Ω, 1/2W
AC 250V
100Ω, 1W+683K
100Ω, 1/2W
AC 250V
100Ω, 1W+103K
470Ω, 1/4W
AC 250V
100Ω, 1/W+223K
470Ω, 1/4W
AC 250V
100Ω, 1W+223K
100Ω, 1/2W
AC 250V
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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.
WATER LEVEL NAME
If the water level is selected 'HIGH' in washing, water supply proceeds until inputing the frequency 22.9 KHz of 'HIGH' in the
MICOM terminal No. 33. Being finished the water supply, washing process is proceeded. After the washing process, water
level reaches to RESET point, and then after the (D)+30 seconds, the spin process begins.
• The value of the frequency between the MICOM terminal No. 33 and the GND.
THE
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 WATER
LEVEL SENSING ERROR (See page 22). 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 Q5 (A1270Y).
• Being checked with tester, the value of the voltage reaches about 4V.
• As the frequency is lower, the water level is higher.
FREQUENCY
HIGH 22.9 KHz
MEDIUM 23.5 KHz
LOW 24.1 KHz
RESET 25.30 KHz
OVER FLOW 22.75 KHz
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WATER LEVEL
340±15
260±15
180±15