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LG WM3770H A Series Service Manual page 2

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1.
Specifications .................................................................................................................................. 3
2.
Features and Technical Explanation ............................................................................................ 4-6
3.
Parts Identification ........................................................................................................................... 7
4.
Installation and Test ................................................................................................................... 8-10
5.
Operation ................................................................................................................................. 11-17
5-1. Control Panel Features ..................................................................................................... 11-13
5-2. Cycle Guide ........................................................................................................................... 14
5-3. Special Functions ................................................................................................................... 15
5-4. Explanation of Each Process ............................................................................................ 16-17
6.
Test Mode ...................................................................................................................................... 18
6-1. Safety Caution ....................................................................................................................... 18
6-2. Load Test Mode ..................................................................................................................... 18
6-3. How To Read the Display in Load Test Mode ........................................................................ 18
7.
Troubleshooting ............................................................................................................................ 19
7-1. Safety Caution ....................................................................................................................... 19
7-2. Error Mode Summary ....................................................................................................... 19-20
7-3. Troubleshooting With Error ............................................................................................... 21-27
7-4. Troubleshooting Else ........................................................................................................ 28-31
7-5. Before using the Tag On function .......................................................................................... 32
8.
Component Testing Information .................................................................................................... 33
8-1. Filter Assembly (Line Filter) ................................................................................................... 33
8-2. Door Look Switch Assembly ............................................................................................. 34-36
8-3. Stator Assembly ......................................................................................................................36
8-4. Pump Motor Assembly ............................................................................................................37
8-5. Inlet Valve Assembly ...............................................................................................................38
8-6. Thermistor Assembly ........................................................................................................ 39-40
9. Disassembly Instructions ........................................................................................................... 41-49
10. Exploded View ......................................................................................................................... 50-52
10-1. Cabinet and Control Panel Assembly ................................................................................... 50
10-2. Drum and Tub Assembly ...................................................................................................... 51
10-3. Dispenser Assembly ............................................................................................................. 52
11. Wiring Diagram ............................................................................................................................. 53
CONTENTS
2

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