This PDF download contains information for the following:
D1420W D1422W D1423W D14131WF D14135LF D14138AC D14121WH LD-4321W LD-4421M LD-4421PV LD-4421NV
The PDF may also contain information that applies to additional models not listed.
LG Dishwasher 3828DD3007T Service Manual