LG DWD-1074FB Service Manual ▷ View online
24
AC 220-240V
NO
NO
YES
220-240V
NO
YES
PWB ASSEMBLY (MAIN)
PWB ASSEMBLY (POWER)
Replace the sensor
(pressure).
Replace the PWB
assembly (Main).
assembly (Main).
Replace the sensor
(pressure).
When pressing [Option] and [Spin] at the same time
after draining, is the water level frequency 252 or
more?
When pressing [Option], [Spin] buttons at the
same time while wash, is the water level
frequency between 220 - 240?
after draining, is the water level frequency 252 or
more?
When pressing [Option], [Spin] buttons at the
same time while wash, is the water level
frequency between 220 - 240?
Checking voltage between two pins as press
the power Button is the voltage 220 - 240V~?
the power Button is the voltage 220 - 240V~?
When pressing [Option] and [Spin] at the same time
after draining, is the water level frequency 252 or
more?
When pressing [Option], [Spin] buttons at the
same time while wash, is the water level
frequency between 220 - 240?
after draining, is the water level frequency 252 or
more?
When pressing [Option], [Spin] buttons at the
same time while wash, is the water level
frequency between 220 - 240?
Replace the PWB assembly
(POWER or MAIN).
(POWER or MAIN).
HEATING WITHOUT WATER
■ WD(M)-8070F(H)B, WD(M)-1070(5)F(H)B, WD(M)-1170(5)F(H)B, WD(M)-1270(5)F(H)B, WD(M)-1370(5)F(H)B
WD(M)-8074F(H)B, WD(M)-1074(6)F(H)B, WD(M)-1174(6)F(H)B, WD(M)-1274(6)F(H)B, WD(M)-1374(6)F(H)B
WD-8078FHB, WD-1078FHB,WM-1171(6)FHB, WM-1371(6)FHB, WD-1271FB(B), WD-1071FB(B)
WD-8078FHB, WD-1078FHB,WM-1171(6)FHB, WM-1371(6)FHB, WD-1271FB(B), WD-1071FB(B)
■ WD-8070F(H), WD-1070(5)F(H)
YES
YES
NO
NO
NO
NO
YES
YES
NO
PWB ASSEMBLY (MAIN)
PWB ASSEMBLY (MAIN)
2
1
(5)
(6)
1
2C
YES
YES
NO
NO
NO
NO
YES
YES
NO
DRAIN MALFUNCTIONING
Repair drain hose.
Remove foreign material.
Reconnect or repair the
connector.
connector.
Replace the pump
assembly.
assembly.
Replace the PWB
assembly (Main) .
Is the drain hose twisted or frozen?
Is the impeller of the drain pump clogged?
Is the connector disconnected, disassembled?
Is the coil of drain pump cut-off?
(resistance of coil is 90~160
Ω)
When checking voltage between connectors
( , ) on spinning, is the voltage 220 - 240V~
as the figure?
Repair drain hose.
Remove foreign material.
Reconnect or repair the
connector.
connector.
Replace the pump
assembly.
assembly.
Replace the PWB
assembly (Main).
Is the drain hose kinked or frozen?
Is the filter of drain pump clogged?
Is the connector disconnected or is the contact
bad?
bad?
Is the coil of drain pump cut-off?
(resistance of coil is 90~160 )
(resistance of coil is 90~160 )
When checking voltage between two receptacles
as shown ( , ) on spinning, is the voltage
as shown ( , ) on spinning, is the voltage
220-240V ?
■ WD(M)-8070F(H)B, WD(M)-1070(5)F(H)B, WD(M)-1170(5)F(H)B, WD(M)-1270(5)F(H)B, WD(M)-1370(5)F(H)B
WD(M)-8074F(H)B, WD(M)-1074(6)F(H)B, WD(M)-1174(6)F(H)B, WD(M)-1274(6)F(H)B, WD(M)-1374(6)F(H)B
WD-8078FHB, WD-1078FHB, WM-1171(6)FHB, WM-1371(6)FHB, WD-1271FB(B), WD-1071FB(B)
WD-8078FHB, WD-1078FHB, WM-1171(6)FHB, WM-1371(6)FHB, WD-1271FB(B), WD-1071FB(B)
■ WD-8070F(H), WD-1070(5)F(H)
25
26
When checking the voltage between
connector the PWB assembly (Main)
during whites washing ,Is the voltage
220 - 240V ?
connector the PWB assembly (Main)
during whites washing ,Is the voltage
220 - 240V ?
Replace the PWB
assembly (Main).
assembly (Main).
YES
NO
After power off and the heater terminal is
disconnected, is the resistance 10 to 30 ?
disconnected, is the resistance 10 to 30 ?
Replace the heater
assembly.
assembly.
NO
After power off,is the resistance of wire
(RED-YELLOW) connectors between
10 to 30 ?
(RED-YELLOW) connectors between
10 to 30 ?
Normal.
NO
YES
RED
YELLOW
1
2
4
3
~
220 - 240V~
220-240V
NO
NO
YES
NO
YES
PWB ASSEMBLY (MAIN)
■ WD(M)-8070F(H)B, WD(M)-1070(5)F(H)B, WD(M)-1170(5)F(H)B, WD(M)-1270(5)F(H)B, WD(M)-1370(5)F(H)B
WD(M)-8074F(H)B, WD(M)-1074(6)F(H)B, WD(M)-1174(6)F(H)B, WD(M)-1274(6)F(H)B, WD(M)-1374(6)F(H)B
WD-8078FHB, WD-1078FHB, WM-1171(6)FHB, WM-1371(6)FHB, WD-1271FB(B), WD-1071FB(B)
WD-8078FHB, WD-1078FHB, WM-1171(6)FHB, WM-1371(6)FHB, WD-1271FB(B), WD-1071FB(B)
■ WD-8070F(H), WD-1070(5)F(H)
When checking the voltage between two
receptacles of the PWB assembly (Power) during
washing.
Is the voltage 220-240V?
receptacles of the PWB assembly (Power) during
washing.
Is the voltage 220-240V?
After power off, is the resistance between yellow
wire and red wire of connector 10 to 30 ?
wire and red wire of connector 10 to 30 ?
After power off, is the resistance of heater
10 to 30 ?
Replace the PWB
assembly (Power).
assembly (Power).
Normal.
Replace the heater
assembly.
assembly.
WASH HEATER TROUBLE
27
NO
YES
YES
1
2
4
3
(1)
1
NO
YES
YES
■ WD(M)-8070F(H)B, WD(M)-1070(5)F(H)B, WD(M)-1170(5)F(H)B, WD(M)-1270(5)F(H)B, WD(M)-1370(5)F(H)B
WD(M)-8074F(H)B, WD(M)-1074(6)F(H)B, WD(M)-1174(6)F(H)B, WD(M)-1274(6)F(H)B, WD(M)-1374(6)F(H)B
WD-8078FHB, WD-1078FHB, WM-1171(6)FHB, WM-1371(6)FHB, WD-1271FB(B), WD-1071FB(B)
WD-8078FHB, WD-1078FHB, WM-1171(6)FHB, WM-1371(6)FHB, WD-1271FB(B), WD-1071FB(B)
■ WD-8070F(H), WD-1070(5)F(H)
Replace the thermistor
(6322FR2046B)
(6322FR2046B)
Push the thermistor
tightly to the rubber.
When disconnect the connector (1) on the
PWB assembly (Main) is the resistance of the
Natural connectors
PWB assembly (Main) is the resistance of the
Natural connectors
~ ② ( Blue/White, Violet),
③ (Blue, White) ₩between 2.5kΩ to 180kΩ
(105
(105
℃
~0
℃
)?
When checking thermistor on the tub cover,
is the thermistor loosened above 2mm from
the rubber?
HEATING CONTINUOUSLY ABOVE
THE SETTING WATER TEMPERATURE
Replace the thermistor
(6322FR2046B)
(6322FR2046B)
Get the thermistor back
to the rubber.
Is the resistance between two receptacles with
BL/WH wires parted from PWB assembly
BL/WH wires parted from PWB assembly
2.5k
to 180k
(105
~0
)?
When checking thermistor on the tub cover,
is the thermistor gotten more than 2 mm out of the
rubber?
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